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 independently
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 |
