Buzz Audio DBC-20 Diode Bridge Compressor
A new take on vintage audio compression with a gain reduction element of silicon diodes in a transformer coupled balanced bridge arrangement.
The DBC-20 diode bridge compressor audio path uses our Class A discrete amplifier design in a balanced configuration from input to output, but for extra colour in this unit, we have a radio steel laminated transformer of our own design to couple into the diode bridge element. This overall combination produces a desirable compression character that can best be described as tight, colourful and rich with harmonics.
dynamic ratio power
In the style of compressors from the 60’s, the DBC-20 diode bridge compressor incorporates a self-adjusting ratio whereby the compression ratio is progressively increased with deepening gain reduction. This feature allows for the control of very dynamic signals (such as vocals) in a seamless fashion and is also a very desirable characteristic when used on complex percussive material.
This compressor is easy to get happening with six switched attack and release times covering a wide range, including an interesting auto release mode. Big knobs are provided for the amount of compression and the output gain control. The DBC-20 diode bridge compressor can be switched to a Soft mode whereby dynamic peaks are partially retained. Another switch introduces a high pass filter to the side chain to lower compression sensitivity at low frequencies which is useful on the mix bus. The large knobs with pointers allow for accurate resetting of the compressor and the fast response 15 LED bar graph meter accurately displays gain reduction.