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Valhalla 2 (1/20/2015)

TRIODE OTL HEADPHONE AMP AND PREAMP



SPECIFICATIONS

Frequency Response: 20Hz-20Khz, -0.1db, 7Hz-200KHz, -3dB Maximum Power, 50 ohms: 180mW RMS per channel Maximum Power, 300 ohms: 800mW RMS per channel Maximum Power, 600 ohms: 450mW RMS per channel THD: < 0.02%, 20Hz-20KHz, at 1V RMS, high gain (worst case) IMD: < 0.03%, CCIR at 1V RMS, high gain (worst case) SNR: > 98db, 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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