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Manafacture: Ashly File size: 701.08 kb File name: pq16-26.pdf Language of manual:

Compared to graphic equalizers that preset center frequencies and bandwidth, the Ashly PQ-Series provides control that can tune over a 5.5 octave range, with variable bandwidth from 3.3 to 1/20 octave. Some applications include: shaping the overall response of a sound system to improve response, feedback control, instrument tone control, speaker or room resonance problems, vocal and dialogue equalization, broadcast announcer voice enhancement, special effects, or any application where complete equalization control is necessary. At th6 heart of the Ashly PQ-Series is our unique bandpass filter circuit. Basically a "state variable" type, this filter is trimmed and optimized to provide excellent transient response and a wide range bandwidth adjustment. Each filter can be tuned over a 50:1 frequency range (about 5.5 octaves) and a 70:1 bandwidth range with no more than a 2dB amplitude error at center frequency. At its sharpest setting, the filter has a "Q" of about 35 and generates a response curve with 3dB points only 1/20 octave apart, making feedback control possible with no audible side effects. Tunable low and high frequency shelving filters are also provided to trim frequency extremes. 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. A hefty output stage is provided so that low impedance loads and long cable runs may be driven with optimal results. The single channel PQ-16 and the stereo PQ-26 (also usable as 12-band mono) Parametric Equalizers are covered by Ashly's exclusive five-year worry-free warranty. Tunable Low and High Frequency Shelving Filters Center Frequency Tunable over a 5.6 Octave Range PQ-16 Master and Individual Band In/Out Bypass Switching Specifications Architect’s Specification Ashly PQ-26 The unit shall be a dual channel parametric equalizer, capable of being center-frequency-tunable over a 5.5 octave range. The unit shall have two channels of 4 bands of equalization adjustable as follows: Low: 16Hz-800Hz, Low Mid: 50Hz-2.4kHz, High Mid: 160Hz-8kHz, and High: 500Hz-24kHz. Each band shall have a bandwidth adjustable between 3 1/3 octave and 1/20 octave. The frequency response shall be 20Hz-20kHz, ±0.5dB. The distortion shall not exceed <0.05% THD, + 10dBV, 20Hz-20kHz. Hum and noise shall be below -87dBV with the EQ engaged and -95dBV with the EQ out. The unit shall offer a per band amplitude adjustment of ±15dB as well as a master gain adjustment of ±15 dB. The unit shall also include low frequency and high frequency shelving covering the range of 30-300Hz and 700Hz to 8kHz respectively. The range of the shelving equalization shall be ±15dB. The input impedance of the unit shall be lOkH active balanced bridging, and the output impedance shall be 20012, terminated with 60012 or more. The maximum in/out level shall be +20dBm or +5dBm at maximum boost, full sharp. The unit shall be designed for mounting in a standard EIA 19” rack (19"L x 3.5"H x 6"D) and shall have a shipping weight of lOlbs . The unit shall operate at 115VAC ±5%, 5...

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