American Audio M1224FX, User Manual And Reference Manual

Page: 16 / 26

©
American Audio
®
- www.americanaudio.us - M1224FX Instruction Manual Page 16
Insert Points
Amp/Line Input
Headphones
Unbalanced
Input/Output
AUX Send
Ring
Ring
Tip
Tip
Sleeve
Sleeve
Send
Return
Screen
Hot ( positive
)
Cold (
negative)
Screen
Left Signal
Right Signal
Ground
Signal
Ground
3 Pole (Stereo) Jack
2 Pole (Mono) Jack
Ring Tip Sleeve
Tip Seeve
2
1
3
Balanced Input
Hot (positive)
Hot (positive)
Sleeve
Screen
Cold (negative)
Cold (negative)
M1224FX CONNECTORS
- Always use good quality twin screened audio cable. Check for instability at the output.
- Always connect both conductors at both ends, and make sure that the screen is connected only at
one end.
- Do not disconnect the mains earth from each piece of equipment. This is needed to provided both
safety and screen returns to the system star point.
- Equipment which has balanced inputs and outputs may need to be electrically isolated from the
equipment rack and/or other equipment, to avoid earth loops.
It is important to remember that all equipment which is connected to the mains it a potential source
of hum and interference and may radiate both electrostatic or electromagnetic radiation. In addition,
the mains will also act as a carrier for many forms of RF interference generated by electric motors,
air-conditioning units, hyristor light dimmers etc. Unless the earth system is clean, all attempts to
improve hum noise levels will be ineffective. In extreme cases there will be no alternative but to pro-
vide a completely separate and independent ‘technical earth’ to replace the incoming ‘noisy earth’.
However, always consult your local electricity supply authority to ensure that safety regulations are
not being infringed.
American Audio products are manufactured and wired to accept wiring practices used throughout
the world.
balanced XLR connections are wired as described, please see the diagram shown below:
Pin #1 Shield
Pin #2 Positive
Pine #3 Negative
balanced 1/4” TRS connections are wired as described, please see the diagram shown below:
Tip is Positive
Ring is Negative
Sleeve is Shield