Bryston BHA-1 User Manual

BHA-1 REAR & FRONT PANEL LEGENDS
FRONT PANEL
1: INPUT SELECT SWITCH
Select between Balanced (XLR 3 pin female),
RCA (unbalanced or single-ended) and MINI
(3.5mm TRS or 3 conductor mini Phone jack)
2: GAIN SELECT SWITCH
Select between 14 decibels (gain = 5) or 20
decibels (gain = 10)
3: VOLUME CONTROL
4: BALANCE CONTROL
With centre detent.
5: BALANCED OUTPUTS
Using two 3 pin XLR jacks, one for the left
channel output and another for the right chan-
nel output. Pin 1 is ground, pin 2 is the posi-
tive phase and pin 3 is the negative phase.
See page 5 and 6 for more wiring details.
6: BALANCED OUTPUT (4 PIN XLR)
This 4 pin XLR jack is wired in parallel to the
dual 3 pin XLR jacks (see above), therefore
do not use both the dual 3 pin XLR’s and the
single 4 pin XLR output at the same time.
Pin 1 = Left + Pin 3 = Right +
Pin 2 = Left – Pin 4 = Right –

Bryston BHA-1 Specifications

General

Type	Headphone Amplifier
Frequency Response	20 Hz to 20 kHz ±0.1dB
Input Impedance	50kΩ
Inputs	2x XLR, 2x RCA
Outputs	4-pin XLR, 1/4 inch TRS
Gain	20dB high gain
Total Harmonic Distortion	Less than 0.005%
THD+N	Less than 0.005%