4
Introduction
The Stereo-Q is a parametric 5-band stereo equalizer which excels particu-
larly in two ways:
• It is the first stereo equalizer in its class.
• The serial-filter design based on the legendar y 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 unsui-
table 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 chan-
nels (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 capaci-
tors for incorporation into the frequency determining components.
Additionally the design of a clearly arranged front panel with comprehen-
sive legible scaling was given high priority; large handy buttons with
detented potentiometers guarantee a fast and assured adjustment.