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Ashly PQX572 Equalizer
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 20 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. PQX572 Equalizer Features• Ý 5 parametric and 2 shelving bands per channel• Ý Wide range adjustment of all parameters for powerful control • Ý Very low noise and distortion • Technical Description • Controls • Master Gain: +/-15dB • Master Defeat Switch: Yes • Per Band Amplitude: +/-15dB • Per Band Defeat Switch: Yes • Parametric Frequencies (5 Bands) • Range Switch Out: 200Hz-20kHz • Range Switch In: 20Hz-2kHz • Bandwidth: .05-3.3 Octaves • Shelving Frequencies (2 Bands) • Low: 40Hz-400Hz • High: 1.6kHz-16kHz • Input Impedance: 20k Ohms, Active Balanced • Output Impedance: 200 Ohms, Terminate with >600 Ohms • Max Input Level: +22 dBu (+7 dBu at max boost, 1/3-octave or narrower) • Frequency Response: +/-.2dB 20Hz-20kHz • Total Harmonic Distortion (THD):
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Ashly Ashly PQX571 Mono 7-Band Parametric EQ Ashly PQX572 Equalizer • Ashly • Add Comment or Question • Write a review!
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