AUDIO DEVICE
OTL Tube Headphone Amplifier (6N6P / 6N1P)
Specifications
| Category | Headphone Amp |
|---|---|
| Brand | Valve Audio |
| Form factor | Desktop |
| Power source | Linear Ps |
| DAC chip | n/a |
| Amp topology | OTL tube (6N6P parallel SE) |
| Output power @ 32Ω | 120 mW |
| Output power @ 300Ω | 1200 mW |
| Output impedance | 65 Ω |
| SNR | 108 dB |
| THD | 0.15 % |
| MQA support | no |
| Price (USD) | $899 |
| Release year | 2021 |
Overview
Output-transformerless tube headphone amplifier optimized for 300 Ω+ dynamic headphones. Two 6N6P output tubes per channel in parallel single-ended configuration; 6N1P driver tube. 120 mW into 32 Ω and 1,200 mW into 300 Ω — the inverse of solid-state delivery curves.
Output impedance is 65 Ω — too high for low-impedance planars (damping factor below 1 produces audible bass bloom) but ideal for high-impedance dynamics where the source-impedance interaction with the driver creates the warm, lush midrange that tube enthusiasts seek.
The canonical pairing is the classic 300 Ω dynamic. See our headphone-amp matching guide for impedance / damping factor rationale.
Output jacks
Recommended pairings
Frequently asked questions
What headphones pair well with OTL Tube Headphone Amplifier (6N6P / 6N1P)?
OTL Tube Headphone Amplifier (6N6P / 6N1P) delivers approximately 120 mW into 32Ω and 1200 mW into 300Ω with an output impedance of 65 Ω. That makes it well-matched to IEMs and high-sensitivity portable headphones.