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Pelham USB DAC is released. It has a USB/DAC module with isolated 24/96 USB into a new controller powered by dual low jitter oscillators into a new reclocker with differential I2S output into dual hybrid NOS dac chips with passive IV conversion (DN2). That differential output is sent to the main board with dual 1:1 isolation transformers make the differential to single ended conversion and send that directly to the 71A output tube. The 71A tube is loaded with a custom 50% nickel choke and an 80% nickel output autoformer. The Pelham is powered externally by a linear regulated power supply with switchable 120/240 voltages.

$9000, Silver autoformer available as well for $19,000 and double silver with silver loading choke $27,500. Silver available in limited quantities.
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Cosecant, really the start of the USB dac craze. In August 6th, 2003 I finished my first Cosecant USB DAC. That was the start for all USB DACS to follow. The Cosecant uses a 6GM8/ECC86 tube with parallel feed transformer coupled output. The new output transformers are wound with Cardas high grade copper.

A separate linear power supply is included with the Cosecant.

The N2 version has isolated USB with a new USB controller with 20x the buffer space and a new reclocker circuit powered by two low jitter clocks. Hybrid 44.1, 48, 88.2 and 96KHz sample rates are supported. All operating systems are supported without drivers. Phones, Tablets and Computers are all supported as well.

$3500.00

Only 2 more left then the Cosecant is done. Sorry we only have transformers for 2 more. One in stock.
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With only a few Cosecant transformer sets left. I figured I better get on it to design something to replace what started it all. After two years and countless new transformers and prototypes the Secant is born. Using directly heated triode output tubes, black gates and the same stellar N2 NOS DAC design this makes an excellent replacement. The external power supply even has a tube rectifier for the high voltage. Top LED indicators to show the sample rate and all bound up in the same package as the Cosecant was.

Hybrid 44.1, 48, 88.2 and 96KHz sample rates are supported. All operating systems are supported without drivers. Phones, Tablets and Computers are all supported as well.

$5000.00
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Callisto Silver USB DAC. Continuing in the N2 tradition the Callisto uses an isolated USB section with a new controller with 20x the buffering space. A reclocker powered by two low jitter audio oscillators and an NOS DAC. Shinko Tantulum resistors do the IV job directly connected to the VT135 triode output tubes into silver outputs. V-Cap ODAM coupling capacitors and an external linear supply supply the rest.

$10,000
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The Brick was conceived after the Cosecant to bring more customers into this new Computer Audio technology. The Brick uses a single 12AU7A in a unique reactor follower directly coupled to the TDA1543 dac chip with passive I/V. The new N2 version is a hybrid which allows users to use 24/96 material in an NOS environment. The USB is fully isolated from the main circuitry. Hybrid 44.1, 48, 88.2 and 96KHz sample rates are supported. All operating systems are supported without drivers. Phones, Tablets and Computers are all supported as well.

Brick N2 $2000, one left with silver wound inductors $7500
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