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Valhalla 2 (10/27/2014)

TRIODE OTL HEADPHONE AMP AND PREAMP




SPECIFICATIONS

Frequency Response: 20Hz-20Khz, -0.1db, 7Hz-200KHz, -3dB

Maximum Power, 50 ohms: 180mW

Maximum Power, 300 ohms: 800mW

Maximum Power, 600 ohms: 450mW

THD: < 0.04%, 20Hz-20KHz, at 1V RMS, high gain (worst case)

IMD: < 0.05%, CCIR at 1V RMS, high gain (worst case)

SNR: > 97db, unweighted, referenced to 1V RMS, low gain

Crosstalk: < -71dB, 20 Hz-20KHz

Output Impedance:  14 ohms (hi gain), 3.5 ohms (lo gain)

Gain: 7 (16.9db) or 1.5 (3.5 db), via rear switch

Topology: All-triode, noninverting, single voltage gain stage, current source biased front end and optimized WCF output stage, DC-coupled input

Tube Complement: 6N1P dual triode input, 6N6P dual triode output, 1 each per channel. 6N1Ps rollable to 6DJ8, E88CC, 6922, 6BZ7, and similar types.

Power Supply:  Two internal power transformers with over 2,000uF of filter capacitance

Power Consumption: 40W

Size: 9 x 6 x 3.25”

Weight: 7 lbs


All measurements made on a Stanford Research SR1+ Audio Analyzer

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