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SINGLE-ENDED TRIODE OTL HEADPHONE AMPLIFIER
ZERO FEEDBACK | NONINVERTING

Valhalla is a Class A, single-ended triode headphone amplifier with no overall feedback and noninverting circuit topology. It provides classic tube sound and can drive headphones with impedances as low as 32 ohms.

Yes, we know that all you got out of the preceding paragraph is probably, “Classic tube sound.” And if you’re not a tube junkie, you might not even know what that means. Well, let us explain. Tube sound is a smoky nightclub with a hot chick in a red dress, it’s a warm swimming pool in summer, glowing green against the purple twilight, it’s a . . . well, hell, you can’t really explain tube sound. Think “smooth, fluid, liquid, alive.” But not in a SF-movie-gonna-eat-you kinda way. Valhalla delivers warm, magical sound for most headphones, as long as they aren’t less than 32 ohms.

All Tube, All The Time
The only active devices in the audio signal path in Valhalla are tubes. The 6N1P triodes input provides highly linear, low noise voltage gain. The 6N6P triodes provide good power output capability for a wide variety of headphones (though, if you're looking at orthos, check Lyr and Asgard instead.

High Quality Parts
Don't compare Valhalla to cheap tube amps using open-frame carbon pots and substandard parts. Compare it to tube amps using Alps blue velvet pots, Dale resistors, Wima capacitors, and other top-end components. Also consider that Valhalla has almost 2,000uf of filter capacitance in its oversized power supply, for superior performance.

5-Year Warranty
Most of Valhalla is covered by a limited warranty that covers parts and labor for five years. That’s 5 years. Yes. FIVE. Compare that to the competition. The parts that aren’t covered by a 5-year warranty: the tubes. Tubes are covered by a 90-day warranty. They should last between 3,000 and 5,000 hours, but they do wear out. They will need replaced. Do not panic. Humans lived for many decades with this technology.

Specifications
Headphone Impedance: 32-600 ohms
Gain: 8 (18 dB)
Frequency Response: 10Hz-200KHz, -3dB
Maximum Output: 30V P-P typ
THD: Less than 0.5%, 20Hz-20KHz, at 1V
Topology: Class-A single-ended triode, zero feedback, noninverting, single voltage gain stage Tube Complement: 6N1P dual triode input, 6N6P dual triode output, 1 each per channel
Power Consumption: 40W
Size: 9 x 6.75 x 3.25”
Weight: 7 lbs