DAC • Preamp • Headphone Amplifier DAVE is an acronym for "Digital to Analogue Veritas in Extremis" DAVE has an FPGA ten times the capacity of Hugo This gave opportunities to further improve performance: Improved time domain (transient timing accuracy) Improved noise-shaper performance DAVE has much more advanced analogue electronics TIME DOMAIN The primary purpose of a DAC is to reproduce the un-sampled continuous analogue waveform from sampled digital data Conventional DACs do a poor job of reproducing the original continuous analogue signal, with timing errors on transients Increasing tap-length of FIR filters gives better time domain accuracy in terms of the timing of transients The ear/brain is extremely sensitive to very small timing errors Timing accuracy upsets the perception of the start and stopping of notes It also degrades the ability to perceive instrument timbre and power It degrades soundstage precision DAVE has a 164,000-tap WTA filter. The noise-shaper takes the high-resolution 2048 FS data and converts it to 5 bits 20-element Pulse Array DAC. Ultra-low-noise sub-milli-ohm power planes for Pulse Array element flip-flops. MEASURED PERFORMANCE Maximum output voltage 6V RMS – the reference voltage dBA, measured using APx 555 THD and noise at 5V RMS 1kHz -124 dBA A wt THD and noise at 2.5V RMS 1kHz - 127 dBA A wt (-124 dBA into 33 ohms) THD 1kHz 2.5V RMS 0.000015% Dynamic Range at -60 dBFS 1kHz -127 dBA A wt No measurable noise floor modulation, no anharmonic distortion Analogue distortion characteristic – no distortion for small signals. Technical Features: Digital Inputs 4x 75Ω S/PDIF BNC Coax – 44.1kHz to 384kHz 1x AES XLR – 44.1kHz to 96kHz 2x Fibre Optic TOSLINK – 44.1kHz to 96kHz 1x USB Type B – 44.1kHz to 768kHz – PCM and DSD Analog Outputs 1x Stereo Pair of Unbalanced RCA 1x Stereo Pair of Balanced XLR 1x 1/4" TRS Jack Headphone Output Performance Frequency Response 20Hz to 20kHz +/- 0.1dB THD +N -127.5dB (AWT) Channel Separation >125dB @ 1kHz Dynamic Range 127.5dB (AWT) Headphone Output 1% THD 6.8v RMS with 300Ω (154mW) 1% THD 6.8v RMS with 33Ω (1.4w) Output Impedance 0.055Ω (short circuit protected) Operating voltage 90v AC – 250v AV auto switching 50Hz – 60Hz Dimensions (including connectors) 333.5mm (W) x 71mm (H) x 154mm (D) Weight 7kg (15.5 lbs) Package Includes 1.5m Type A to Type B USB Cable 1.5m 10a IEC Mains Power Lead Reference Dave Remote Dave Owners Manual 5-Year Warranty DAVE Presentation

Hidizs MS1-Galaxy Customized 10.2mm High-Performance Dual Magnetic Circuit Dynamic Driver In-ear Monitors. Disclaimer: "Hidizs" Company graciously provided the "MS1 GALAXY HEADPHONES" for this review. I recently had the opportunity to test out the MS1-Galaxy earphones from Hidizs, and I must say, I was thoroughly impressed, it was nothing short of breathtaking. First off, the packaging is of excellent quality. Upon receiving the MS1-Galaxy, I was immediately captivated by its packaging. Unboxing these earphones is like unwrapping a present, creating an eager anticipation for the listening experience ahead. The earphones come in a sleek black/transparent design, with an option to choose between a cable with or without a microphone which adds a touch of customization to suit individual preferences. When you take that out of the box, the rest is underneath: the cable you selected (with or without microphone) in a plastic bag, and you're greeted with six silicone tips (one pair each of small, medium, and large sizes) in a small plastic bag. You also get a serial number and date card, a card with specs and a pretty manga image, and a bilingual instruction manual (English and Chinese languages) with assembling illustrations. No travel pouch is provided. Tech Highlights: At the heart of the MS1 Galaxy lies its innovative 10.2mm dual magnetic dynamic driver, featuring a PU+PEEK composite polymer diaphragm. This advanced diaphragm technology ensures cleaner sound reproduction, minimal distortion, uniform thickness, and enhanced sensitivity. With a sensitivity of 108 dB @1kHz and an impedance of 32Ω, the MS1 Galaxy effortlessly pairs with any portable audio player or dongle DAC seamlessly, making it a versatile choice for audiophiles on the go. Design: The MS1 Galaxy not only delivers on performance but also excels in aesthetics. Available in a range of vibrant colors including black, red, blue, and mixed variations with or without a microphone, it caters to diverse preferences. Crafted using high-density German Makrolon resin for the faceplates and shells, the earphones offer stability and comfort to the user. The injection molding technique employed in the manufacturing process lends a premium finish to the faceplates. Sporting a distinctive diamond-like design protected by resin, the faceplate provides a glimpse of the dynamic driver, 2-pin connector, and wires, adding to its visual appeal. The average-length nozzle, equipped with a nozzle lip, ensures a secure fit for the ear tips, eliminating any worries of slippage. Speaking of fit, these earphones nestle comfortably in the ears, guaranteeing hours of uninterrupted snug, and secure fit for listening pleasure. The cable is not pre-attached to the earpieces, and it's important to put things together properly, or else you won't get a good fit in the ear - instructions are provided for that. The cable has a Blue dot on the LEFT side and a Red dot on the RIGHT side (Red for right is a well-known convention in audio. The color of the other side varies). The cable is the correct way to loop around your ear as shown in the wearing guide. Need to attach the silicon tips also. The easiest to do is by turning the flexible part inside-out while attaching it and then flipping it back into place after it is seated. Try them all to see what works best in your ears. For good Bass response, they should seal well. According to my experience, for the best bass response, you can try to use foam bits. For example, I like tips from the Comply. The pièce de résistance – the sound quality of the MS1-Galaxy is simply mesmerizing. The MS1-Galaxy earphones deliver a truly remarkable audio experience. The sound is incredibly clear and deep, immersing you in your music like never before. It's like having diamonds in your ears, as the sound sparkles with clarity and depth. Sound Impressions: The low-frequency extension is excellent; There is a touch of extra sibilance at the top end but it's not severe. The overall frequency response is slightly V-shaped, with a bit of bass and treble emphasis, but again it's not nearly as pronounced as on some earbuds and it provides a good listening experience. Bass: The MS1 Galaxy delivers robust bass with considerable quantity, particularly in the mid-bass region, offering a satisfying thump. However, its emphasis on quantity compromises quality, resulting in a somewhat bloated and overpowering bass that occasionally masks vocals and instruments. Ideal for bass enthusiasts seeking a visceral experience. Mids: While the MS1 Galaxy's mids excel with male vocals, offering richness and natural timbre, its performance with female vocals is lacking. Female vocals sound thin, recessed, and artificial, with a veiled quality that detracts from the overall listening experience. The mids, overall, lack the forwardness needed to convey vocal nuances effectively. Treble: With the relaxed treble extension, the MS1 Galaxy provides a non-fatiguing listening experience, featuring adequate sparkle without excessive detail retrieval. While suitable for laid-back listening sessions, it may lack the finesse needed for intricate musical passages., missing the finesse needed for complete musical immersion. In summary, the Hidizs MS1 Galaxy offers commendable comfort and a robust bass response but falls short in isolation and vocal reproduction, making it better suited for bass-heavy genres and casual listening rather than critical listening sessions or environments requiring noise isolation. Conclusion: Hidizs has once again raised the bar in the ultra-budget segment with their latest offering, the MS1 Galaxy, priced at a mere $25.99 SRP. Boasting a formidable 10.2mm Dual Magnetic Circuit Dynamic Driver, this earphone promises an immersive audio experience without breaking the bank. With its remarkable sound quality, comfortable fit, and stylish design, it effortlessly surpasses expectations, all at a wallet-friendly price point. Whether you're a casual listener or a seasoned audiophile, the MS1-Galaxy promises an immersive audio experience that's second to none. I can wholeheartedly recommend the Hidizs MS1-Galaxy earphones. They offer exceptional sound quality, comfortable fit, and stylish design, all at a reasonable price point. Hidizs has truly outdone itself with this product. Kudos to Hidizs for delivering yet another masterpiece in the form of the MS1-Galaxy. Final Rating: 4.5/5 Features: - High-Performance Dual Magnetic Circuit Dynamic Driver - 10.2mm PU+PEEK Composite Diaphragm - Optional Inline Control & Microphone - High-Density German Makrolon Resin Shell - Silver-Plated Oxygen-Free Copper Wire - 0.78mm 2-Pin Plug - Ergonomic Liquid Silicone Ear Tips - Ergonomic Design with Comfortable Extended Wear - Perfectly Aligned With The H-2019 Target Frequency Response Curve - 3.5mm Gold-Plated Plug & Durable Metal Shell & Splitter - Hi-Res Certification

Headphone Amplifier Balanced headphone amplifier with 4 output stages 50 Volts internal operating voltage - ideal for high-impedance headphones High output power, for headphones with low impedances and magnetostatics +/- 18 dB pre-gain 3500 mW Pmax at 50 Ohm > 23 V RMS into 600 Ohm Volume control with RK 27 potentiometer Large 38 mm all-aluminium knob Delayed switching of headphones after power-on Integrated power supply 2 Line inputs: XLR (L/R) 2 Line inputs: RCA (L/R) 1 Stereo headphone output: 4.4 mm Pentaconn balanced 1 Stereo headphone output: 4-pin XLR balanced 1 Stereo headphone output: 6.3 mm jack unbalanced Dimensions (W x H x D): 170 x 65 x 252 mm Weight: 3.1 kg

Solid-State Fidelity: The Era of Ultra-High-Resolution MEMS Speakers IEM Driver Technology xMEMS’ solid-state MEMS micro speakers deliver a new level of performance, size, energy efficiency, and uniformity not possible with traditional voice coil speakers through the combination of design innovation and monolithic capacitive piezo-MEMS manufacturing. xMEMS micro speaker technology is based on the inverse piezoelectric effect using piezoMEMS material and is covered by 90+ patents and over 100 patents pending. The inverse piezoelectric effect is created by applying an electrical voltage to make the piezoMEMS contract or expand, converting electrical energy to mechanical energy. This energy excites an integrated silicon membrane to move air and generate acoustic sound waves. Unlike bulk piezoceramics or crystals, which have been used to generate low-grade speakers and buzzers for decades, xMEMS’ piezoMEMS actuators offer an increased range of movement enabling rich, loud audio. And now, Noble Audio’s new Falcon Max TWS (True Wireless Stereo) and FoKus earbuds will include the groundbreaking MEMS-based driver from xMEMS Labs. Through this partnership, Noble Audio’s Falcon Max headphones will be some of the first to adopt cutting-edge MEMS speaker technology. xMEMS Products SOUND QUALITY Montara, Cowell, and Montara Plus: Full bandwidth (20Hz-20kHz) with flat frequency response for occluded applications High-performance tweeter or midrange tweeter for open/leaky applications Cypress: Full bandwidth (20Hz-20kHz) for ANC earbuds +/-1° phase consistency for improved spatial audio performance No in-band resonances Superior high-frequency response vs. coil speakers improves: Clarity Presence Speech-in-noise performance for hearing health applications 0.5% THD (94dB @ 1kHz) Better SPL/mm3 ROBUSTNESS Monolithic piezoMEMS 10,000g mechanical shock resistance CONSISTENCY Highly uniform frequency response and phase Reliable semiconductor process (JEDEC-qualified) Eliminates driver matching and calibration LONGER LISTEN TIMES Capacitive vs. current-driven architecture reduces driver power consumption WATER-PROOF IP58 water immersion and dust resistance without special membrane PRECISE TRANSDUCTION The monolithic design eliminates spring and suspension recovery of coil-based speakers Fast mechanical response (<50μs group delay) enables improved ANC bandwidth of nonstationary noise Near-zero phase delay increases the maximum noise suppression bandwidth of stationary noise IMPLEMENTATION World’s First SMT-ready micro-speaker Companion piezo amplifier IC (xMEMS Aptos) SMALL SIZE 1mm thickness More space for larger batteries or more components Top or Side-firing package orientations

111 MUSICCENTER The 111 Musiccenter is an audiophile masterpiece that sets a new standard for digital music reproduction. The technology combines a music server, CD player, CD ripper, DAC, and an analog preamplifier for a groundbreaking variety of functions. Musiccenter With its 111 Musiccenter Burmester sets a new world standard for the era of digital music reproduction. This audiophile masterpiece offers a music server, CD player, and CD ripper as well as a DAC and an analog preamplifier in one groundbreaking unit. Uniquely, it combines reference-quality music reproduction with a never-before-seen variety of functions. At the same time, operating it is intuitive and user-friendly, thus subtracting nothing from a relaxed musical enjoyment. Behind the absolute musical fidelity and outstanding sound of the new Reference Line Musiccenter stand cutting-edge technical capabilities. The digital engine of the 111 can handle massive amounts of data in the blink of an eye. It takes only fractions of a second for any selected track to start playing. As a multi-talent, the Musiccenter can do much more than operating as a music server. Its full-function analog preamp section can serve as the central control unit of any music system. With three analog and six digital inputs, it offers music lovers great connectivity for a multitude of external sound sources. Design The design and visual appearance of this new highlight in the Burmester portfolio combines avant-garde touches with well-known and proven aspects of Burmester products, particularly their clean and uncluttered lines. Inside, the two-chamber construction metallically separates the preamp from the server section to rigorously insulate the analog section with its sensitive DAC from potential interference from the server section. Even though its imposing appearance marks a new trend for the visual design of Burmester products it still shows popular classical elements like chrome and high-quality brushed aluminum. Handmade The eye-catching rotary knobs on the front panel have been developed especially for the 111 Musiccenter. They are mounted last at the end of a long and complex manufacturing process. Burmester’s highly trained technicians carefully measure, assemble, and polish more than 60 pounds of aluminum, transformers, circuit boards, and other electronic parts to form this remarkable work of audiophile art. TECHNICAL DETAILS

SPL DIAMOND Premium DAC with VOLTAiR technology. Unparalleled Audio Precision: A Short Review of the Diamond Premium DAC with VOLTAiR Technology. The Diamond Premium DAC with VOLTAiR technology stands as a pinnacle in digital-to-analog conversion, offering an unparalleled audio experience for those who exclusively indulge in digital music sources. With connectivity for six digital sources and an external word clock, the Diamond sets itself apart with its superior VOLTAiR technology and premium DAC featuring the exceptional DLP120. This, coupled with an analog volume control, ensures the highest resolution at any volume level, delivering an unmatched analog feel and extraordinary soundstages. One of the standout features of the Diamond is its versatility in accommodating various digital sources. Offering stereo USB and AES inputs, as well as two optical and coaxial stereo inputs, it supports both PCM and DSD audio conversion via USB. The source selection is intuitive, thanks to the front control and dot matrix LED display, which elegantly showcases the chosen input and, after a brief moment, the type of clock source and detected sampling rate. The Diamond's synchronization capabilities are noteworthy, not only aligning with the integrated clock in the source signal but also providing a word clock input for digital players. The DAC seamlessly adjusts to the sampling rate and resolution of connected devices, be it a streamer, computer, CD player, or external word clock, ensuring a consistently high-quality audio output. Equipped with two stereo output pairs – one with XLR and the other with RCA outputs – the Diamond offers flexibility in connecting power amplifiers or active loudspeakers. The volume control on the front panel governs both outputs, with the option to individually switch off the signal path for each output via the DIP switch on the device's rear, catering to various audio setups. At the heart of the Diamond is the DAC768, featuring the acclaimed AKM AK4490 Velvet Sound™ premium DAC chip. Capable of handling PCM audio with a resolution of 32 bits and a sampling rate of up to 768 kHz, as well as DSD audio up to DSD256, the DAC768 ensures a meticulous reproduction of sound details. The integration of the SPL DLP120 with VOLTAiR technology in the DAC768 sets it apart from its counterparts, offering dynamic headroom and sound quality that exceeds conventional standards. The VOLTAiR technology, operating at a DC voltage of 120 volts, is a testament to the Diamond's commitment to achieving the highest audio quality. The proprietary SPL 120V SUPRA operational amplifiers, designed to handle such high voltage, contribute to exceptional technical specifications and sonic benefits, including an impressive dynamic range, signal-to-noise ratio, and headroom. This technology, unique in the world, elevates the listening experience by delivering rich detail and a relaxed, immersive ambiance. In conclusion, the Diamond Premium DAC with VOLTAiR technology stands as a masterpiece in the realm of digital audio conversion. Its meticulous design, advanced features, and commitment to sonic excellence make it a worthy investment for audiophiles seeking an unparalleled audio experience. User Manual

What DAC's Design Is Better And Why Better for You? - Delta Sigma (DS) DAC - R2R (Resistor Ladder) DAC Reflecting on digital-to-analog conversion concepts, the ongoing discourse between Delta Sigma (DS) and R2R (resistor ladder) DAC designs continues to intrigue audio enthusiasts and professionals alike. The fundamental question of which is superior often leads to a quagmire, as the theoretical debate faces the challenge of numerous implementation variables in DAC design – an analog to the futile endeavor of proving the inherent superiority of apples over pears. To truly assess the merit of each design, it becomes imperative to transcend theoretical discussions and delve into the realm of practical experience. Comparing the sonic signatures of a well-crafted DS DAC with a meticulously designed Non-Oversampling (NOS) R2R DAC, such as the widely recognized TDA1543, unveils the distinctive and naturally musical character of the latter. Those who have embraced the unique qualities of a digital filterless R2R design understand its enchanting sonic allure. However, it's crucial to acknowledge that the DAC chip alone does not dictate the entire listening experience! Surrounding elements, including power supplies, the I/V conversion stage, the SPDIF receiver (if present), and the output stage, contribute significantly to the final output. In the practical realm, the complexity deepens further. The circuit's design, the careful selection and combination of components around the DAC chip, and the digital transport – whose role is as pivotal as the DAC itself – collectively shape the audio experience. In this intricate web of variables, the pursuit of audio perfection transcends the narrow confines of DS versus R2R debates. Rather, it emphasizes the holistic orchestration of components and design choices that harmonize to create a symphony of sound. Thus, the exploration and appreciation of digital-to-analog conversion extend beyond theoretical postulations, inviting enthusiasts to engage in the rich tapestry of practical implementation where each element plays a nuanced role in crafting an auditory masterpiece. The distinctive qualities of R2R DAC designs, particularly those emphasizing non-oversampling (NOS) configurations, stand in stark contrast to their Delta Sigma (DS) counterparts, sparking an ongoing debate in the audio community. The essence of this debate transcends theoretical discussions, finding resonance in the practical experiences of enthusiasts. Drawing an analogy to photography, the comparison between R2R and DS is likened to images captured with optical lenses versus those subjected to digital zoom and extensive post-processing. A well-designed NOS R2R DAC is lauded for its ability to present music with depth, organic textures, and a natural flow, akin to the richness found in pictures taken with proper optical lenses. The theoretical superiority of DS chips, evident in their specifications, often falls short in practical applications. While DS DACs boast impressive accuracy numbers post-modulation, achieving these figures in real-world scenarios proves challenging due to factors such as power supply quality and imperfections in components and materials. The clever concept of oversampling, demodulation, and noise shaping employed by DS DACs comes at a cost, particularly in terms of musicality. The critical examination of DS DACs reveals their reliance on oversampling, which involves interpolating missing data and subsequently noise-shaping and filtering. The resulting sound is characterized by clarity and perceived details, yet it often lacks the natural coherence and precision found in music. The use of a negative feedback loop in DS designs introduces phase and amplitude distortion, adversely affecting the emotional engagement of the listener. In contrast, NOS R2R DACs, devoid of digital filtering, offer a more natural and musically alive experience. While both DS and R2R designs grapple with imperfections inherent in digital-to-analog conversion, the absence of digital filtering in NOS R2R designs contributes to their distinctive sonic character. The perceived weaknesses of NOS R2R DACs, such as a lack of resolution, are mitigated through meticulous component selection and circuit optimization. The impedance mismatch inherent in DAC designs is also addressed through innovative approaches, such as using a single transistor for I/V conversion and a class A, zero-feedback valve output stage. In the quest to determine what is truly superior, the evaluation extends beyond theoretical considerations. The comparison hinges on the critical assessment of real-world examples, inviting listeners to discern between a NOS R2R DAC's brute force, real-time resolution, and a DS chip's filtered pink noise manipulated by algorithms. The conclusion leans toward the subjective experience, where the musicality of NOS R2R designs often surpasses that of modern DS counterparts, offering a timeless and analog-like sonic richness. The inherent musicality of NOS R2R designs, when coupled with meticulous circuit implementation and high-quality components, defies the notion of obsolescence. The analog-like sound and natural timbres found in NOS R2R DACs prompt a reconsideration of progress in audio technology, suggesting that the charm of established and optimized technologies may rival or even surpass the latest innovations. Ultimately, the judgment rests in the ears of the listener, inviting them to appreciate the timeless elegance of well-crafted NOS R2R DACs in the ever-evolving landscape of audio technology. Links: Delta Sigma vs Non-oversampling (NOS) R2R DAC https://en.wikipedia.org/wiki/Delta-sigma_modulation https://dsp.stackexchange.com/questions/88339/sigma-delta-modulator-for-dac https://www.allaboutcircuits.com/textbook/digital/chpt-13/r-2r-dac/

The HIFI ROSE RA280 Integrated Amplifier, the latest offering from the Korean brand, is making waves in the audio community. Drawing inspiration from the success of its predecessor, the RA180, the RA280 continues the legacy with its refined design and innovative technology. Design and Build Quality: The RA280 boasts an elegant industrial aesthetic that effortlessly complements any modern listening space. The sturdy aluminum chassis not only adds weight and solidity but also effectively isolates electronic circuitry from surrounding interferences. The top-mounted vents not only contribute to the design's character but also aid in efficient heat dissipation. Amplification Technology: Utilizing HiFi Rose's advanced Class AD design with GaN FET technology, the RA280 brings a minimalist and opinion-dividing approach to amplification. The Class AD amplifier, a step beyond traditional Class D, employs Gallium Nitride FETs for improved efficiency, higher output, and enhanced noise and distortion measurements. Performance: The RA280 doesn't compromise on performance, featuring separate 250W (4Ω and 8Ω) amplifier modules per channel, delivering a total system power of 500W. The HiFi Rose-designed two-stage analog filter minimizes carrier noise associated with Class D amplifiers, ensuring a clearer and cleaner sound across the frequency range. Tone Controls and Connectivity: The front panel offers Bass and Treble tone controls, providing users with the flexibility to tailor the sound to their preferences. With one balanced and three unbalanced inputs, a built-in phono stage, subwoofer output, trigger connections, and a grounding post, the RA280 offers a comprehensive range of features and connectivity options. Power Supply: The power supply, initially developed for the flagship RA180, incorporates Silicon Carbide FET technology for high output efficiency with low heat generation. Responding well to power delivery fluctuations, the 2.5kW class PFC circuit and high-capacity condenser ensure stable performance. Technical Specifications: Amplifier Out: 250W x 2ch (500W) at 4Ω and 8Ω Input Sensitivity: Balanced Input 600mV, Unbalanced Input 300mV, Phono (MM) Input 5mV Impedance Input: 47kΩ for all inputs THD: 0.007% (@ 125W) Damping Factor: >250 Signal to Noise Ratio: Balanced, Unbalanced: 109dB, Phono MM: 85dB Output Impedance: 30mΩ Tone Control: Bass (@100Hz) / Treble (@10kHz) ±15dB Size: 430 x 355 x 103mm Weight: 9.5kg Conclusion: The HIFI ROSE RA280 Integrated Amplifier impresses with its sophisticated design, innovative technology, and powerful performance. With a comprehensive set of features and a focus on sound quality, this amplifier is a noteworthy addition to any audio enthusiast's setup, especially considering its affordability in the high-end audio market.

WA23 LUNA Amplifier - Unveiling the Pinnacle of High-End Audio WA23 LUNA, compact version flagship WA33 amplifier with a fresh aesthetic that doesn't compromise on delivering an exceptional audio experience, a revolutionary piece that not only breaks away from the mundane design of traditional Hi-Fi equipment but also delivers unparalleled sound quality. Design: Say farewell to the conventional black boxes that dominate the Hi-Fi landscape. The WA23 LUNA is a visual masterpiece, a departure from the ordinary. The curved lines surrounding the volume controller, showcasing the premium ALPS RK50 potentiometer's brass enclosure, and the meticulously crafted black-and-gold chassis CNC machined from a single piece of aluminum redefine how audio components should look and feel. The WA23 LUNA is a testament to uncompromising quality, both in its internal components and external aesthetics. Craftsmanship: Each WA23 LUNA undergoes expert hand assembly by master craftsmen with decades of experience in point-to-point wiring. The painstaking attention to detail, patience, and dedication to absolute quality are evident in every unit. This small team, trusted with building flagship amplifiers, ensures that the WA23 LUNA is not just an audio device but a work of art. Internals: The WA23 LUNA's foundation is a single-ended triode pure Class A design, boasting a pair of 6C45 driver tubes, a pair of 2A3 power tubes, and a single 5U4G rectifier tube. The warm glow emitted by the tubes from the moment you turn it on sets the mood. Every internal component, from the custom-made output transformers to Mundorf capacitors, is carefully selected through extensive listening tests for their sonic capabilities. When the music starts playing, the richness in details, clean highs, wide dynamic range, and deep full bass create an immersive sonic experience. Functionality: The WA23 LUNA's compact size, complemented by a small external power supply, allows it to seamlessly fit on your desk or the side table next to your easy chair. The marriage of innovation and unrestrained engineering takes performance to new heights, redefining the standards of high-end audio. Conclusion: In the WA23 LUNA, innovation, craftsmanship, and cutting-edge engineering converge to create a masterpiece that not only captivates the eyes but also creates a product that also elevates your audio experience to unprecedented levels. The WA23 LUNA is more than an amplifier; it's a statement, a commitment to pushing the boundaries of what's possible in high-end audio. In the WA23 LUNA, innovation, craftsmanship, and sonic excellence harmonize to create a product that transcends the boundaries of high-end audio. More than an amplifier, the WA23 LUNA is a statement — a testament to the relentless pursuit of perfection in both design and sound. Elevate your audio experience; let the WA23 LUNA redefine your perception of what is possible in the world of high-fidelity sound. Highlights: Introduced in February 2022 Single-ended, all-tube design (not hybrid), Class A operation Power tube: 2A3 x 2, driver tube: 6C45 x 2, rectifier tube: 5U4G x 1 Self-biasing amplifier Headphone amp or preamplifier Transformer-coupled, Point-to-Point wiring User-selectable HI / LO impedance and HI / LO level for headphone User-selectable output: pre-amp or headphone ALPS RK50 potentiometer in a brass enclosure Mundorf Supreme Silver/Gold capacitor for interstage coupling, one per channel (4pcs) Polytetrafluoroethylene (PTFE) tube sockets Compatible headphones (8–600 Ohms) Inputs: XLR x 1, RCA x 2 Outputs: preamplifier (Pre-out) XLR x 1, headphone outputs: 4-pin XLR and 6.3mm (1/4”). Frequency response: 10Hz to 50KHz Preamplifier voltage gain: CNC-machined aluminum chassis milled out of a solid block of aluminum in an anodized, sand-blasting finish Color: black and gold Operating AC voltage: 115v – 230v (voltage below 115v requires step-up transformer) Dimensions: AMP without tubes: 16” L x 10-5/8” W x 4” H (407mm x 270mm x 102mm) AMP with tubes installed 16” L x 10-5/8” W x 7” H (407mm x 270mm x 178mm) PSU: 7” L x 4-1/8” W x 3-1/4” H (178mm x 105mm x 83mm) 1.0m (3.5ft.) custom-made premium umbilical cord [custom length available] Weight: 30 lbs / 13.6 KG Power consumption: 150 watts Designed and assembled in New York, USA Three-year limited warranty [learn more] In the Box: WA23 LUNA amplifier x 1 6C45 driver tubes x 2 2A3 power tubes x 2 5U4G (5U3C) rectifier tube x 1 External linear power supply unit x 1 1.0m (3.5ft.) custom-made premium umbilical x 1 Quick start guide *AC power cord and audio cables are not included Visit Patreon Site

The iFi Audio ZEN Stream is a formidable addition to the ZEN series, showcasing a focus on streaming. With its DAC collaboration, this device transforms any WiFi-connected gadget into a remote control, enabling high-resolution music streaming from various sources. Whether it’s Spotify, Deezer, or service-specific modes like Tidal Masters, the ZEN Stream covers all your streaming needs. Underneath its elegant exterior, the ZEN Stream is a technological powerhouse. Offering true hi-res performance with PCM384/DSD256 via WiFi/LAN, its open-source architecture ensures future-proofing through constant updates. The streamlined design, featuring two USB 3.0 ports with Active Noise Cancellation II, S/PDIF out with iPurifier, and Silent Power tech in the power supply, contributes to its cutting-edge capabilities. The ZEN Stream’s software platform is meticulously optimized, allowing exclusive modes for specific operations, minimizing ‘software jitter’ and ensuring top-notch sonic performance. It stands out as an all-in-one solution, supporting DLNA streaming, NAA streaming, Roon Ready, and Tidal streaming. Connectivity options are extensive, supporting Spotify Connect, Tidal Connect, DLNA-certified streaming apps, Airplay, Chromecast (future update), and Roon compatibility. Powered by a robust 64-bit quad-core ARM Cortex microprocessor and incorporating technologies like Active Noise Cancellation II and iPurifier, the ZEN Stream boasts serious horsepower beneath its unassuming exterior. In summary, the iFi Audio ZEN Stream impresses with its seamless operation, extensive connectivity, and powerful hardware, making it a masterful addition to the world of streaming devices. For more details, you can visit their website: iFi Audio ZEN Stream https://ifi-audio.com/products/zen-stream/