Aphex 228 - Manual (Page 22)

Aphex Systems Ltd. Model 228 Page 20
228
instruction Manual
Page 21 Aphex Systems Ltd. Model 228
228
8-channel audio interface
PART 2: BALANCED OUT to UNBALANCED IN
It was mentioned that there are several types of
balanced output stages in use today. The following
diagrams show you how to properly unbalance each
type of output. If you follow these instructions, you
should have no problems.
SIMPLIFIED SCHEMATIC
Transformer Balanced Outputs
Mono Phone Plug
Female XLR
Servo Balanced Outputs
Mono Phone Plug
Female XLR
SIMPLIFIED SCHEMATIC
Voltage Balanced Outputs (Used on the 207)
Mono Phone Plug
Female XLR
SIMPLIFIED SCHEMATIC
Don’t Ground or Connect Pin 3
Ground Pin 3 Directly to Pin 1.
Alternatively, Carry Pin 3 Through Twisted Pair Cable
and Ground at Other End
Ground Pin 3 Directly to Pin 1
Do Not Carry Pin 3 Through Cable and Ground
at Other End
Impedance Balanced Outputs
Female XLR
SIMPLIFIED SCHEMATIC
Pin 3 Doesn’t Matter
OK Grounded or Not Grounded
Unbalancing loses half the output level.
You lose 6dB of gain.
Unbalancing loses no output level.
You retain full gain.
Unbalancing loses no output level.
You retain full gain.
Unbalancing loses no output level.
You retain full gain.
Mono Phone Plug
Appendices