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Operating Manual - MQX-2310, MQX-1310, and MQX-2150 Graphic Equalizer
6. CONNECTIONS AND CABLES
6.1 Balanced vs. Unbalanced Audio Connections
Balanced signal connections are preferred in pro
audio applications because of their improved immunity
to induced hum and noise. A properly shielded and wired
balanced input stage on any product will by design reject
most unwanted noise picked up by the cable as well as
minimize ground loop problems. Therefore it is always
advantageous to use balanced connections when running
signal more than ten or fifteen feet, although particularly
noisy environments (high RFI, EMI, etc.) may require that
even short cabling be balanced.
Unbalanced connections are used mostly for short
distance, high level signals (0dBu nominal). Most exter-
nal EMI noise pick-up will be masked under the noise
floor of the signal, assuming there is little or no gain fol-
lowing the unbalanced signal. If a gain stage does follow
a signal, or if externally sourced noise persists, use bal-
anced connectors. The main advantage of unbalanced con-
nectors is cost, as an unbalanced (tip-sleeve) plug costs
less and is easier to wire than a balanced (TRS) plug.
100-120VAC
50-60Hz 15W
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
COVER. NO USER SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
AVIS:
RISQUE DE CHOC ELECTRIQUE -
NE PAS OUVRIR.
Ashly Audio Inc.
Made In USA
Model MQX-2310
Balanced In
p
Balanced In
p
100-120VAC
50-60Hz 15W
Ashly Audio Inc.
Made In USA
Model MQX-2150
No User Serviceable Parts Inside. To Reduce The Risk Of Fire Or
Electric Shock, Do Not Expose This Equipment To Rain Or Moisture
Balanced
Input
6.2 Inputs and Outputs
Your MQX equalizer is provided with three dif-
ferent connector types. 1/4" TRS (tip-ring-sleeve) phone
jacks, three pin XLR connectors, and screw terminals will
allow interfacing to most professional audio products.
Ashly TRS balanced connections use the tip as (+) and
the ring as (-) signal, with sleeve used for ground. Ashly
XLR connectors use pin 2 (+) and pin 3 (-) with pin 1
ground. Inputs are active balanced using precision 1%
metal film resistors. Outputs are "pseudo-balanced",
which means they have balanced impedance with a single-
ended signal source, and can be wired balanced or unbal-
anced. When possible, we recommend balanced
connections between all components in your system.
If inputs are used unbalanced, the signal should
be on the (+) connection and the (-) connection must be
tied to ground, or signal loss will result. While a mono
phone plug used as an unbalanced connection will auto-
matically ground the (-) ring of the jack, XLR and screw
terminals will not automatically do this so attention must
be given to proper wiring.