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> PQ Recording Equalizer
Owner‘s Manual
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PQ Recording Equalizer, Model 2377 Owner‘s Manual Owner‘s Manual V 1.0, 5/2004 Software version 016 R & D: Wolfgang Neumann The information in this document has been carefully verifi ed and is assumed to be correct. However Sound Performance Lab (SPL) reserves the right to modify the product described in this manual at any time. Changes without notice. This document is the property of SPL and may not be copied or reproduced in any manner, in part or full without the authori
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Content Introduction ................................................................................................... 3 Installation .................................................................................................... 4 Technology ..................................................................................................... 5 Fuctions and Operation ................................................................................... 6 Rear Panel/Connections, External Powe
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Installation BEFORE SWITCHING ON POWER SUPPLY AND PQ, THE PQ MUST BE CONNECTED TO Setting the appropriate supply voltage THE POWER SUPPLY WITH THE SUPPLIED MULTICORE LEAD. PAY ATTENTION TO A The appropriate supply voltage (115 V/230 V) must be set on the rear panel of the SECURE CONNECTION. external power supply. The fuse block (left from the power cord socket) can be The PQ and the external power supply should be situated away from heat sources inserted in two positions to meet your country‘
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Technology SPL High Gain Technology Additional construction features SPL is constantly pushing analog signal processing to its limits by combining the best possible components with perfectly optimized circuit design. As our latest achieve- All crucial resistors in the I/O and fi lter circuits are subject to ultra-tight tolerances of ment in this ongoing process, SPL‘s High Gain Series surpasses the hitherto accepted 0.001% to ensure clean and accurate amplifi er stage performance. All circuit bo
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Functions and Operation Constant Q and proportional Q modes Each frequency band consists essentially of two fully parametric equalizers: one for constant Q mode and one for proportional (or variable) Q mode, selectable per band. The PQ is the fi rst equalizer to offer both modes, endowing it with double equaliza- tion power for demanding corrective and creative applications. In constant Q mode, the selected bandwidth remains unaffected by the amplitude setting, making it the best choice for co
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Functions and Operation Amplitude Amplitude settings are freely adjustable from -/+ 15 dB in proporional mode and from -/+ 20 dB in constant Q mode. Frequency Each channel provides fi ve fully parametric frequency bands covering 10 Hz to 28 kHz. Each band overlaps its neighbor by one octave and can be independently acti- vated and deactivated. The following frequency bands are provided: LF (Low Frequencies): 10 Hz - 235 Hz LMF (Low Mid Frequencies): 35 Hz - 720 Hz MF (Mid Frequencies): 330 H
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Rear Panel/Connections Audio inputs and outputs are provided as balanced XLR connectors. Connect the included external power supply to the multi-pin socket in the upper left corner, ensuring that the connection is secure. Please note: To ensure secure connections, stable operation and optimal audio quality, always use professional-grade cables and connectors. External Power Supply The PQ comes with an external linear power supply featuring a toroidal transformer for optimal audio quality and
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Specifi cations Input impedance (balanced): 20 kOhm (Welwyn precision resistors; transformerless) Output impedance (balanced): ‹ 600 Ohm (CMR trimmers, transformerless) Overload resistance: +34 dB (Band 1-5 = ON, B/C = 0) Harmonic distortion: @-30 dBu: 0.2% @-20 dBu: 0.05% @0 dBu: 0.01% @+10 dBu: 0.002% @+30 dBu: 0.0005% S/N: -90 dBu (A-weighted; -88 dBu w/o Filter) (Band 1-5 ON, B/C = 0, each Q = Q 1, Band 1 = 10 Hz, Band 2 = 100 Hz, Band 3 = 1 kHz, Band 4 = 10 kHz, Band 5 = 28 kHz
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Warranty SPL electronics GmbH (hereafter called SPL) products are warranted only in the All remedies and the measure of damages are limited to the above services. It is country where purchased, through the authorized SPL distributor in that country, possible that economic loss or injury to person or property may result from the failure against defects in material or workmanship. The specifi c period of this limited of the product; however, even if SPL has been advised of this possibility, this
