Nagra

Classic PHONO

MSRP not recorded

The Nagra Classic PHONO is a phono stage manufactured by Nagra, designed for moving-coil and moving-magnet cartridges. It uses custom-made Nagra input transformers, a fully tube-based Class A topology with four triodes—2× E88CC/6922, 1× ECC81/B739, and 1× ECC83/B759—and an internal 100–240 V power supply, with optional Classic PSU support. It provides adjustable gain from 37.7 to 63.9 dB, selectable RIAA, TELDEC, and COLUMBIA curves, adjustable cartridge loading, and mono operation.

MSRP

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Original list price not on record.

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Specifications

1: MM 增益开关低点 37.7 dB 增益开关高点 47.7 dB MC 增益开关低点 53.9 dB 增益开关高点 63.9 dB kHz
Nagra: 2 個 E88CC / 6922 1 個 ECC81 / B739 1 個 ECC83 / B759
SNR: > -82 dB (ASA A) With dummy loads connected to the inputs
Crosstalk: > -75 dB (typically > -82 dB)
Dimension: 350 (390 from nose of the modulometer to back of the connectors) x 277 x 80mm (15.4 x 10.9 x 3.2 inches) – Add 3cm or 1.2 inches with a VFS plate placed under
Mains fuse: T 500 mA FST 5 x 20 mm 250 V
Weight: 5.4 kg 11.9 lbs CLASSIC PHONO unit alone with 1x MC / MM input and 1x MC input
Output level: 1 V RMS for 0 dB Large tolerance to smoothly provide 2 V RMS
Power supply: Internal 100 240 V~ ±10% / 50-60 Hz With Mains or with optional CLASSIC PSU 1x 12.6 V / 1.5 A w (Standby <1 W)
Output impedance: < 500 Ω (typically 470 Ω)
Power consumption: PMAX 35 W
Transformer ratio: 16 dB
Frequency response: 20 Hz 50 kHz +0.6 dB RIAA, TELDEC, -0.2 dB COLUMBIA LP 100 Hz 50 kHz +/- 0.2 dB
Interchannel phase: < 4° (typically 0.35°) @ 20 kHz
Operating environment: Indoor only IP30
Operating temperature: +15 °C to +35 °C Moderate climate +59 °F to +95 °F
Tube stage gain 1 khz no load: MM Gain switch LOW 37.7 dB Gain switch HIGH 47.7 dB MC Gain switch LOW 53.9 dB Gain switch HIGH 63.9 dB
Total harmonic distortion THD n: Please refer to the below graph
Vacuum tubes selected by nagra laboratory: 2x E88CC/ 6922 1x ECC81/B739 1x ECC83/B759