Drawmer 1977 Operator's Manual - Page 5

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AUDIO CONNECTIONS

The inputs and outputs are electronically balanced on conventionally wired XLRs (pin 1 screen, pin 2 hot,

pin 3 cold and XLR shell is connected to chassis). The 1977 fully conforms to the EMC standards, if the

unit is used where it maybe exposed to high levels of disturbance such as found close to a TV or radio

transmitter we suggest that the screen of the signal cable is connected to the chassis connection on the

XLR type connector. The operating level is nominally +4dBu.

If ground loop problems are encountered, never disconnect the mains earth, but instead, try disconnecting

the signal screen on one end of each of the cables connecting the outputs of the 1977 to the patchbay. If

such measures are necessary, balanced operation is recommended.

The side-chain access points are unbalanced. The side chain feature on the 1977 is part of the compressor

feedback stage and would normally be connected to a normalised or semi-normalised pair of patchbay

contacts. This would allow the user to insert additional EQ for some de-essing, or frequency conscious

compression. The intended use of the audio insert jacks would be to patch in EQ (eg Drawmer 1961, 1974),

reverb or similar processing. Connection is via stereo ¼" jacks, the wiring convention being: ring is signal

send, tip is signal return and sleeve ground.

DRAWMER 1977 O

PERATOR'S

ANUAL