Ashly presents the PQX series parametric equalizers. Like graphic equalizers,
parametrics allow you to boost or cut selected frequencies. However, parametric
equalizers also allow exact adjustment of the frequency and bandwidth of each
band, resulting in very precise control of frequency response. The amplitude,
center frequency, and bandwidth are the “parameters” for each equalizer band
and the term “Parametric” refers to the ability to adjust all of these characteristics
The Ashly PQX series equalizers are a third generation design including many
refinements on our original PQ models. Lower noise, greater headroom, additional
filters, full 20Hz -20KHz range on all parametric filters and additional connector
types are the result.
The heart of the PQX equalizers is a unique bandpass filter circuit. Basically a
“state-variable” type, this filter is trimmed and optimized to provide excellent
transient response and a wide range of frequency and bandwidth adjustment.
Each filter can be tuned over a 100:1 frequency range (about 6.6 octaves) and
a 70:1 bandwidth range with no more than a 2 dB amplitude error at center frequency.
At its sharpest setting, the filter has a “Q” of about 35 and generates a response curve
with 3 dB points only 1/20 octave apart, making feedback control possible with no
audible side effects. Each filter is placed in the feedback loop of a summing amplifier
to produce the desired frequency response. Since a separate summing amplifier is used
for each band, no interaction between bands occurs. After twenty years of refinement,
the Ashly parametrics are the most powerful equalization tool available. They especially
excel in control of resonance and feedback yet also provide smoother broadband tone
shaping than Graphic equalizers.
|5 Fully parametric bands|
|Parametric filters tunable from 20Hz to 20KHz|
|Very low hum and noise design|
|Adjustable bandwidth from 3 1/3 to 1/20 of an octave|
|True reciprocal curves|
|Master and individual band in/out bypass switching|
|Balanced Inputs and Outputs|
|XLR, 1/4″ TRS and barrierstrip audio connections|
|Five Year Warranty|