Manual Model 2048 Parametric 5-Band Stereo Equalizer
Manual Stereo Q Model 2048 Version 1.0 – 5/2000 R & D: Wolfgang Neumann The information in this document has been carefully verified 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 authorization of SPL.
Contents Introduction ................................................................................................................... 4 Features ........................................................................................................................... 5 Hookup ............................................................................................................................. 5 Connections: Rear front/wiring .......................................................................
Introduction The Stereo-Q is a parametric 5-band stereo equalizer which excels particularly in two ways: • It is the first stereo equalizer in its class. • The serial-filter design based on the legendary QURE equalizer filter guarantees the high tonal qualities for which SPL-products have become renowned.
Features • Three fully parametric bands in accordance with the musically effective proportional-Q-principle, Boost/Cut +/- 15 dB, Q 0.5 to 5; LOW band:10-250 Hz, MID band: 140 Hz-3,5 kHz, HIGH band: 940 Hz to 24 kHz. • Sub-Bass-EQ (Cut/Boost +/- 14 dB, up to 200 Hz) with coil/capacitor filter network that produces a penetrating and lucid deep tone spectrum. The combination of Sub-Bass and Low filter for the processing of the bass spectrum is very effective and opens a new dimension for sound creations.
Console outputs, insert sends 2 3 1 Pin wiring XLR input 1 = GND, 2 = hot (+), 3 = cold (-) Outputs (XLR or Jack) All stereo signals (or 2 x Mono) Inputs (XLR or Jack) 1 3 2 Console inputs/ stereo returns or inserts of any equipment Sampler Pin wiring XLR output 1 = GND, 2 = hot (+), 3 = cold (-) Guitar amp Stereo mic preamp Pin wiring stereo jack connectors Tip = hot (+), Ring = cold (-), Sleeve = GND Keyboard Connections Rear front/ wiring
Connections General Advice Again, while Stereo Q’s housing is EMV-proof and protects against HF-interference, placement of the unit is very important. Please read hookup instructions first (page 4). Before connecting the the unit or any other equipment turn off all power. Adjust the voltage setting on the back so that it corresponds with the power conditions.
Operation General Advice Proportional-Q principle info Low-, Mid- and High filters operate to the proportional-Q principle. This means that maximum possible boost and cut is dependant upon the selected bandwidth. If the bandwidth is increased the measure of boost or cut (=amplitude) decreases automatically with the setting of the Cut/Boost control. Obversely the amplitude increases automatically as the bandwidth decreases.
Power, Active, Sub Bass Operation Power The power switch is used to turn the unit on or off.The positive and negative paths of the power supply are separated in front of the power unit to ensure that the switched off unit is reliably separated from the mains current. The lamp in the power switch is powered directly from the mains current in conformity with CE-regulations, enabling easier detection of faults: If the power lamp is not illuminated the reason is probably a defective mains fuse.
Operation Low Coils additionally produce a more pleasant harmonic spectrum, which is especially important for the precision and tangibility of bass sounds. The Sub Bass filter is exceptionally suitable in presenting voluminous and powerful deep bass sound and produces a fat bass layer. In combination with the Low filter extensive possibilities for processing of bass sounds are provided.
Mid, High Operation Mid The Mid filter covers a frequency range of 140 Hz to 3.5 kHz (Frequency control). The frequency range of the Mid filter reaching down to 140 Hz offers a problem-free access to sounds in this range. This means that a snare which operates often around 160 Hz can be processed with the Mid filter, leaving the Low filter free for other instruments. The maximum cut and boost (Cut/Boost control) of the selected frequency is +/- 15 dB. The Q factor can be varied from 0.
Operation Air, 3D Enhancer Air The Air filter comprises of a passive network of capacitor, resistor and coil in the same way as the Sub Bass filter. It possesses a so called bell-characteristic with a center frequency at 17.5 kHz. At this frequency the maximal possible boost or cut is +/- 9 dB. The inductivity of the coil possesses advantageous acoustic properties in comparison to simple condenser resistor filter stages.
Power Supply Built around a toroidal transformer, the power supply allows for a minimal electromagnetic field with no hum or mechanical noise. The power supply's output side is filtered by an RC circuit to extract noise and hums caused by your power service. 6000µf capacitors smooth out the positive and negative half waves. The supply voltage can be set to 230 V/50 Hz or 115 V/60 Hz. Check your country’s power requirements for the appropriate setting.
Warranty SPL electronics GmbH (hereafter called SPL) products are warranted only in the country where purchased, through the authorized SPL distributor in that country, against defects in material or workmanship.The specific period of this limited warranty shall be that which is described to the original retail purchaser by the authorized SPL dealer or distributor at the time of purchase.
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