Drawmer DA6 Balanced Distribution Amplifier - Manual (Page 4)

DA6 OPERATORS’ MANUAL
INTRODUCTION
The distribution of mono and stereo balanced audio signals from a single source to
multiple destinations has many applications, including: multi-zone sound reinforcement
installation; live sports events coverage; broadcast studios; video suites; duplication
houses or where high quality audio has to be distributed to a number of locations down
long cable runs.
The Drawmer DA6 is a six channel stereo output ( or twelve mono ) distribution amplifier
featuring XLR balanced connections. Optional transformer balanced outputs are offered
for instanced where electrical isolation of remote equipment is required.
The electronically balanced stereo input features individual left/right level controls with
LED bargraph metering enabling the correct balancing of stereo material or two mono
signals. Each of the six output pairs incorporate further left/right level controls and a
Mono/Stereo switch which will mix two stereo signals, or, connect a single mono signal
to both stereo outputs.
The monitor section consists of a channel select so that the individual left/right output
level of each channel can is displayed on the output LED bargraph and can be
simultaneously heard at the front-panel headphone jack.
An auxiliary pair of balanced output jacks provide a facility to connect further DA6 units
where even more distribution is required. These outputs are post input gain trim, and
may be fitted with optional output isolating transformers.
INSTALLATION
The DA6 is designed for standard 19" rack mounting and occupies 1U of rack space.
Avoid mounting the unit directly above power amplifiers or power supplies that radiate
significant amounts of heat. Always connect the mains earth to the unit. Use fibre or
plastic washers to prevent the front panel becoming marked by the mounting bolts.
AUDIO CONNECTIONS
Input and Output audio connections are provided via balanced XLRs at a level of +4dBu.
This applies to both inputs and outputs. The wiring convention being:
Pin 1 Ground; pin 2 Hot; and pin 3 Cold.
For use with unbalanced systems, the Cold pin 3 must be grounded at both input and
output inside the XLR connectors.
The Stereo Aux. Outputs are balanced ¼" (TRS) jack sockets, where Tip connection is
Hot; Ring is Cold; and Sleeve is Ground. These connections are offered for chaining
multiple DA6 units if there is a requirement for more than 6 stereo outputs. For use with
unbalanced systems, use mono jack plugs, or connect the Ring (Cold) to the Sleeve
terminal inside the Jack plugs.