Nagra HD Phono

Recent arrival- Nagra's HD Phono. Phono preamp and power supply is in almost new condition. complete with all packing, documentation, cables and unopened remote. This unit was used briefly and fully tested. It is listed at 9/10 only because it not in a factory sealed box.

The HD PHONO is a two chassis design in which the delicate phono stage circuitry is isolated in its own CNC machined aluminum chassis. A second chassis serves to house a massive supercapacitor external power supply. Supercapacitor based power supplies provide all of the advantages of battery-based power supplies with the added advantage of accepting and delivering charges much faster and with higher current load and cycle stability than battery-based power supplies. This power supply is based on those of the HD PREAMP and HD DAC X but features a number of innovations which make it even more silent with improved performance. Both chassis are suspended in a system incorporating a damped, constrained layer platform coupled to four isolator damped towers providing superior vibration resistance.

The best of analog is incorporated in the HD PHONO. It is dual-mono, pure Class A with 100% tube stages. In addition, it incorporates remote control cartridge load adjustability from 10 to 390 Ohms, with steps as fine as 5 Ohms for smaller values. This allows perfect matching between your cartridge and HD PHONO stage – all confirmed by ear from the comfort of your listening chair.

The HD PHONO features a new generation of input transformers. Following the original VPS transformer and based on the Nagra IV-S microphone input transformers, the HD PHONO’s transformers are a fourth-generation design featuring 26 dB of gain. The new transformer’s core is made with Cobalt and is cryogenically treated over the course of several weeks to improve performance. The transformer itself is hand wound in a very delicate process requiring watchmakers’ type of skills.

Technical specifications:
ELECTRONICS
Transformers ratio:    26 dB
Tube stage gain:    30.5 dB
36.5 dB
42.5 dB
Maximum gain:
Transformers ratio and tube stage gain
68.5 dB with gain switch @ +6 dB
Output impedance:    < 500 Ω
Frequency response:    10 Hz – 100 kHz      +1.5 dB / – 2 dB
Signal to noise ratio:    80 dB ASA A
Dynamic range:    > 150 dB
Output level:    1 VRMS for 0 dB
Harmonic levels:    < 0.1 %                      @ 1 kHz, 1 V out, no load
Crosstalk:    > 80 dB                     @ 1 kHz, 1 V RMS
Filtering:
De-emphasis curves selectable with the FILTERING controller & display: RIAA, TELDEC, NAB 100μS, VICTOR EUR, VICTOR USA
Input setting – MC1 & MC2:
 
Goodwin's High End is a brick and mortar store and Nagra dealer, located just outside of Boston. 

If paying via PayPal please add 3% for domestic or 4% for international. For international PayPal or wire transfer only. PayPal to alan@goodwinshighend.com 

Store hours (Eastern Time): Tuesday-Thursday 11am-7pm Friday-Saturday 11am-5pm

As we are a registered Audiogon dealer, for quicker responses please feel free to deal directly with us instead of messaging through Audiogon. For detailed information or questions please email michael@goodwinshighend.com