Bravo - 6v6 tube Headphone Amplifier

$2,900.00

Hand Built in North Carolina, USA

Pure Class-A Operation
Dual Independent Power Supplies
Two 6SN7 (NOS) and two pairs of 6V6 (NOS) included

Designed and tuned for the discerning listener.
A Lifetime Amp

Bravo amplifier acoustic performance chart plotting dB SPL output against headphone impedance from 16 Ω to 600 Ω across three efficiency tiers (85, 95, and 100 dB/mW), with sample headphones — ULI, Ada, O2, Utopia, and HD600 — all reaching above 110 dB SPL of clean headroom.

Features

Core Architecture

Pure Class-A Operation
Tube Complement: 6SN7 & 6V6
Dual Independent Power Supplies
Pure Single-Ended Triode-to-Pentode Signal Path
No-Compromise Topology (Zero tone-killing compromises; entirely free of Cathode Follower or Parafeed circuits)
True Auto-Bias Circuitry
Optimized Load Profile: Ideal for headphones 32 Ω to 600 Ω

Craftsmanship & Signal Path

100% Hand-Built Construction
Premium Point-to-Point Wiring
Fully Shielded Input Stage
TKD 2CP-2511 100k Premium Volume Control

Power & Real-World Noise Specifications

Heavy-Duty Power Transformers
Premium CLCLC Filter Stage with Dual Heavy-Duty Filter Chokes
Non-Magnetic Aluminum Chassis (Eliminates stray eddy currents & hum)
Elevated DC Filament Supply
Honest Residual Noise Floor: −80 dB (Loaded @ 32 Ω) / −72 dB (Unloaded)

Elevated DC filaments and a CLCLC-filtered B+ rail drop the noise floor. The result is full clean power across the entire impedance range.

The power supply is true dual mono, meaning that each separate power supply powers one 6V6 and one side of the 6SN7 for complete channel separation.

The B+ (high voltage) supply is rectified with ultra-fast diodes and the plates of the 6SN7 are supplied with regulated B+ from a Zener diode chain. Non-inductive Vishay resistors on the regulated B+ rail and on the 6V6 cathodes keep the signal path clean from supply to output stage.

Specifications

Headphone Output Power Matrix

Impedance	Max Voltage (V RMS)	Clean Power	Use Case
8 Ω	1.6 V	320 mW	Ultra-low impedance stability
16 Ω	2.6 V	422 mW	High-current drive
32 Ω	4.0 V	500 mW	Standard low-impedance benchmark
50 Ω	4.7 V	441 mW	Optimized planar magnetic drive
100 Ω	5.7 V	324 mW	Mid-impedance studio control
150 Ω	6.2 V	256 mW	High-voltage swing stability
200 Ω	6.5 V	211 mW	Premium audiophile matching
300 Ω	6.8 V	154 mW	High-impedance reference standard
600 Ω	7.0 V	81 mW	Extreme voltage studio drive

Preamplifier output (unloaded line out): 8.0 V RMS max clean · residual noise floor ≤ −78 dBm.

Loaded noise floor: ≤ −80 dBm into 32 Ω — acoustic silence on high-sensitivity headphones.

Acoustic Performance — dB SPL at Max Clean Power

Real-world headroom: how the Bravo's clean wattage translates into volume across different headphone efficiencies. 110 dB+ represents concert-level headroom.

Impedance (Max Clean Power)	Low Eff. (85 dB/mW)	Mid Eff. (95 dB/mW)	High Eff. (100 dB/mW)
32 Ω (500 mW)	112 dB SPL	122 dB SPL	127 dB SPL
150 Ω (256 mW)	109 dB SPL	119 dB SPL	124 dB SPL
300 Ω (154 mW)	107 dB SPL	117 dB SPL	122 dB SPL
600 Ω (81 mW)	104 dB SPL	114 dB SPL	119 dB SPL