Sound Performance Lab 2048 User Manual
Model 2048
Manual
Parametric 5-Band Stereo Equalizer
2
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.
Limitations of Liability:
In no event will SPL be liable for any damages, including loss of data, lost
profits, cost of cover or other special, incidental, consequential or indirect
damages arising from the use of the unit,however caused and on any theory
of liability.This limitation will apply even if SPL or an authorized dealer has
been adviced of the possibility of such damage.
Sound Performance Lab
P.O.Box 12 27
D- 41368 Niederkruechten, Germany
Phone +49 - 21 63 / 98 34-0
Fax +49 - 21 63 / 98 34-20
eMail: info@soundperformancelab.com
www.soundperformancelab.com
© 2000 SPL electronics GmbH. All Rights Reserved.
3
Contents
Introduction ................................................................................................................... 4
Features ........................................................................................................................... 5
Hookup ............................................................................................................................. 5
Connections:
Rear front/wiring ............................................................................................................ 6
General advices,sockets .............................................................................................. 7
Operation:
General Advice
Proportional-Q, recommendations for the setting of bandwidth (Q) ............ 8
Power ................................................................................................................................9
Active ............................................................................................................................... 9
Sub ..................................................................................................................................... 9
Low ....................................................................................................................................10
Mid .....................................................................................................................................11
High ...................................................................................................................................11
Air .......................................................................................................................................12
3D Enhancer ...................................................................................................................12
Power Supply .................................................................................................................13
Specifications ...............................................................................................................13
Warranty ..........................................................................................................................14
Copy Master ..................................................................................................................15
Notes ................................................................................................................................16
4
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 gua-
rantees the high tonal qualities for which SPL-products have become
renowned.
The continuously increasing number of stereo equipment such as stereo
keyboards, samplers or guitar amplifiers together with the broad spectrum
of sundry stereo effect gear reinforces the need for utilization of stereo
equalizers. Furthermore the processing of stereo tracks in the console’s
subgroups (drums, loops, synth or vocal groups for example) or master
tracks is facilitated and improved by using a stereo EQ.
All control functions for both channels can be adjusted with one control –
a large time saver. It is extremely important however that both channels are
assured of being adjusted equally.Differing adjustments could cause unsuitable correlations of the stereo program, the correction of which is very
complicated.The close adjustment-tolerances of the Stereo-Q reliably avoid
this problem which makes it an extremely suitable unit for inclusion in a 5.1
surround studio where the need for coherent twin matching of both channels (front L/R or surround L/R) is paramount.
Even small and medium sized recording studios are now in a position to
produce high quality masters. Keyboard players or guitarists are provided
with the perfect tool for fast production of stereo signals with outstanding
tonal properties.
The filter circuits of the Stereo-Q are serially constructed which prevents
mutual influencing of the filters. All components used are of high and
selected quality. Great value was laid on the selection of high quality capacitors for incorporation into the frequency determining components.
Additionally the design of a clearly arranged front panel with comprehensive legible scaling was given high priority; large handy buttons with
detented potentiometers guarantee a fast and assured adjustment.
5
Hookup
• 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: 940Hz to 24 kHz.
• Sub-Bass-EQ (Cut/Boost +/- 14dB, up to 200Hz) 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.
• Air-EQ: the selected coil/capacitor-filter network provides a silky and airy
presence – especially in digital recording.
• The 3D-Enhancer intensifies the spatial impression of the stereo signal
without affecting the low frequency tonal components.
• Optional provision of input and output transformers from Lundahl:balancing through transformer stages; the galvanic separation ensures high
operational safety. Tonal advantages are offered by the transformer coil.
This minimizes odd harmonic distortion and provides a silky top end.
• Generally coils sound less aggressive, but produce a rounder and more
powerful sound in the deep tone spectrum. This means they possess
advantageous musical properties which is why SPL prefers to install coils
in the filter area.
• Ground: Disturbances which could have an effect over the ground-runs
are minimized by the separation of the audio-ground from that of the
remaining apparatus. This leads substantially to a higher and ‘cleaner’
tonal quality (in the strictest sense of the word).
• Power supply:The toroidal transformer forms the basis for a clean power
supply throughout the circuitry.
Carefully select a place for setting up the Stereo Q. The unit should be
situated away from heat sources and direct sunlight. Avoid installation in
environments exposed to vibrations, dust, heat, cold or moisture. Keep the
unit away from transformers or motors or any other unit that could generate
large variations in power supply or cause electrical interferences. Do not
install the unit in proximity to power amplifiers or digital processors. You
may consider placing it in a rack containing other analog gear. Such placement can prevent interference from Word Clock,Smpte, MIDI,etc.
• Do not open the case. You may risk electric shock and equipment damages.
• Leave repairs and maintenance to a qualified service technician. Should
foreign objects fall inside the case, contact your authorized dealer or support person.
• To avoid electric shock or fire hazards do not expose your unit to rain or
moisture.
• In case of lightning unplug the unit. Please unplug the cable by pulling on
the plug only; never pull on the cable. Never force a switch or knob.
• To clean the case use a lint-free cloth. Avoid cleaning agents as they may
damage the chassis. Manufactured in standard 19" EIA format, it utilizes two
rack units.
• Please support the back of the unit whenever it is being mounted into a 19"
rack (especially important when touring).
Features
Loading...