Aphex Channel Instruction Manual download pdf (Page 23)

230

instruction Manual

Aphex Systems Ltd. Model 230Page 22

230

master voice channel

Page 23Aphex Systems Ltd. Model 230

transformerless balanced, usually called “active bal-

anced”. Transformer balanced outputs are becoming

outdated because of their high cost and their sonic

limitations. However, they can still be found on a lot

of older equipment.

Within the transformerless class, there are several

types of circuits that are used by different manufac-

turers. These different types of output circuits all look

just about alike to any balanced line, but they act dif-

ferently when driving an unbalanced line. You need

to observe the proper cable wiring for each type of

output circuit. We strongly recommend that you refer

to your various equipment manuals to find out what

is used in each case before hooking up to unbalanced

lines.

When connecting a balanced output to a balanced

input, however, you don’t need to know what kind

of balanced output you are dealing with. Simply

treat it generically.

Appendices

PART 1: BALANCED OUT to BALANCED IN

OK for Microphones

Standard store-bought cable. Shield grounded at both ends.

Positives: Good for microphones.

Negatives: May cause ground loops through the shield grounds if used

to connect equipment together.

Preferred for Line Levels

Shield grounded at receiving end only.

Positives: Stops ground loops and reduces noise.

Negatives: None

Standard store-bought cable. Shield is grounded at both ends.

Positives: Both ends are interchangeable.

Negatives: May cause ground loops through shield contacts.

BETTER

Custom cable. Shield is grounded at receiving end only.

Positives: Stops ground loops and reduces noise.

Negatives: Should be oriented so lifted shield is at sending end.

1/4” TRS Phone to 1/4” TRS Phone Balanced Cables

XLR to XLR

XLR to 1/4” TRS Phone Balanced Cables

Stereo Phone Plug

Female XLR

Male XLR

From an Output

No Connect

Stops Ground Loops

Stereo Phone Plug

To an Input

From an Output

No Connect

Stops Ground Loops

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