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MQX-2150
The graphic equalizer shall be stereo (2 channels). Each
channel shall consist of 15 bands centered on standard
ISO frequencies at intervals of 2/3 octave and covering
a frequency range of 25Hz to 16kHz. Individual bands
shall be activated by linear slide faders with a 25mm
travel, and a tactile center detent. The range of equaliza-
tion per band shall be switchable between ±15dB or
±6dB.
The equalizer shall have a gain of unity with all sliders
centered, and shall have a maximum in/out level of
+23dBu. Frequency response shall be ±.25dB 20Hz to
20kHz. Hum and noise shall be at least -96dBu and
SMPTE intermodulation distortion or THD shall be
less than 0.01% at +20dBu. Input impedance shall be
20k ohm balanced, 10k ohm unbalanced. Output
impedance shall be 200 ohm balanced, 100 ohm unbal-
anced. Inputs and outputs shall be active (tranformer-
less) balanced type on both XLR and 1/4 phone jacks.
Individual filters shall be Wein-bridge type and con-
nected in a summing circuit optimized for minimum
filter interaction and constant bandwidth at any slider
setting. Boost and cut characteristics shall be fully sym-
metrical, with the filter being electrically removed from
the circuit in the center (flat) position. Individual filters
shall be accurate to within 3% of indicated center fre-
quency and shall be non-adjustable to insure long term
accuracy.
The equalizer shall also include an 18dB per octave
high pass filter at 20Hz, internally selectable. A green
signal presence and red clip indicators shall show criti-
cal operating levels. Input gain shall be adjustable over
minus infinity to +6dB, and an overall EQ bypass
switch shall be included. The equalizer shall weigh 6.5
lbs net and mount in a standard 19 rack using 1 space
(1.75 high). The power requirement shall be 90-
125VAC, 50-60Hz, 10W. The unit shall be an Ashly
Audio MQX-2150.
TECHNICAL NOTES & SPECIFICATIONS
ARCHITECTS SPECIFICATIONS
MQX-2150 Miniature 15-Band Graphic Equalizer
Features:
Constant "Q" design for low
ripple and minimum interac-
tion
Precision Wein Bridge Filters
Balanced XLRs & 1/4 TRS
Jacks on Inputs and Outputs
Selectable 15dB or 6dB Range
18dB/Octave High Pass Filter
Low Noise Design
Silent In/Out Switching
Signal Present and Clip LEDs
25mm Fader with Center-Off
Position
5-Year Worry-Free Warranty