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Underwood Hifi is glad to be selling Audio GD products. Audio GD is a 17 year old Chinese company that produces state of the art products at amazingly affordable prices. Reviews on all their products have been excellent.
We were blown away at the value per dollar on these products.
Save $200.00 during our current Sale
We ship from stock out of our Georgia warehouse. We also service the product in Georgia.
The R28 (2022 version) is a Fully Balanced solid state preamp with 9.5 watts per channel headphone amp and a resistor ladder DAC. We continue to be shocked at this level of sonic performance along with this feature set at this cost. Comparable products sell for $3000.00-$4000.00 range from the competition.The preamp or DAC alone is worth he price of the entire product. DAC’s of this quality typically sell for over $3000.00.
The R28 features 8 fully discrete R2R DAC modules to combine into a real balanced push/pull digital decoder as well as 4 fully discrete real balanced DSD native decoders. The DAC uses two 90/98 MHz Accusilicon 318B femto clocks to provide ultra low jitter.
The Amanero USB input supports 32bit / PCM384K PCM and up to DSD 512 asynchronous transfer. Clocking is done by a custom programmed FPGA. The whole digital circuit is built around one custom programmed FPGA and 5 CPLD programmable chip sets to separate the different circuits for avoid any interference in the data process in parallel mode.
The R28 headphone amp has two gain modes, 12DB in the low gain position to drive higher efficiency headphones at over 95dB sensitivity, and 22DB on high gain with the full 9.5 watts to drive any lower efficiency phones such as the HifiMan HE6 at 85dB efficiency.
The custom internal software that runs the unit is upgradable to improve sound quality in the future. All digital process mode settings are accessible by buttons on the front.
An upgraded metal remote is available at only $60.00 with purchase. The analog output stage is superb and has a tremendous effect on any DAC’s sound quality. After the D/A conversion by the R2R D/A modules the analog signal is run by fully discrete matched-transistor output stages. These high speed special ACSS output stages are zero-feedback and a current driven design as opposed to the voltage design of most other DAC’s. They are Special because almost all other designs need to convert the signal multiple times from and to current or voltage, resulting in less detail and a less defined soundstage.
The Output stage in the R28 has 4 pairs of 15W transistors to offer tremendous output capability. This Diamond Differential design avoids switch distortion. It works in full Class A mode but doesn’t draw large idle current. This balanced drive design lowers noise and distortion and improves the soundstage presentation and transparency.
Compare this Preamp/DAC to anything we have heard under $2000.00-$2500.00.
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Read our over 13,700 points of AudiogoN #1 rated feedback and then call 770-667-5633 with questions or to order this fine preamp/DAC/headphone amp or other Audio GD products.
GA & HI residents add sales tax.
Brands carried: Audio Alchemy, Audio GD electronics, Audio GE speakers, Bluesound music servers & streamers, Core Power Technologies A/V Power conditioners & cables, Denon, DSPeaker room correction, Emerald Physics speakers & amplifiers, Focal headphones, HifiMan headphones, Iso-Acoustics, LSA speakers, headphones, turntables & electronics, Marantz Reference, Martin Logan speakers & subwoofers, MOFI Electronics, Musical Fidelity, Music Hall Ortofon cartridges, Peachtree Audio, Project turntables, Quad, Raal headphones, Sendy headphones, Silverline Audio speakers, SPL electronics, Sumiko cartridges, Sweet Vinyl pop & click filters, Wireworld, Zesto Audio tube electronics
Sales policies on the Underwood Hifi Inc. website at www.underwoodhifi.com