The PCB is intended for "balancing" and increasing the gain of unbalanced audio equipment.
Each PCB has an integral dual Phono socket for the unbalanced input and either XLR or IDC connections for the balanced outputs.
All connectors are in a row, in the same plane, thus allowing easy mounting of the PCB. If the non XLR version is chosen then the output signal will appear internally on the 10 way(2x5) 0.1" IDC type header.
The power to the board is supplied via another 10 way IDC header thus allowing power to be bussed along several boards.
Ideally a supply of +/-15v should be used, although the board will operate from lower voltages.
The gain of each board is adjustable, up to +20dB, these presets are adjusted from the same edge of the PCB as the connectors.
(See also Lynden PCB 97432, part no. 09-120, for balanced>unbalanced conversion)

The PCB is intended for converting balanced audiio feeds to unbalanced, and reducing their gain, allowing "domestic" audio equipment to be used in a balanced environment.
Stereo Balanced audio, input on 3 pin PCB mout XLRs, to be fed, via a pair of attenuators and high quality isolating transformers, to gold plated phono/cinch output connectors. A preset is provided for adjustment of each attenuator, accessible from the same edge of the board as the connectors. All connectors are on the same plane along the edge of the PCB making mounting the board easier.
Please note that the unit is passive, no PSU is required.
(See also Lynden PCB 97432, part no. 09-120, for balanced>unbalanced conversion)