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Stereo Q
Model 2048

Production discontinued

I n  S h o r t

Two In One

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.

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.

Features

• Three fully parametric bands in accordance with the musically effective proportional-Q-principle, Boost/Cut +/- 15dB, Q 0.5 to 5; LOW band:10-250 Hz, MID band: 140Hz-3,5kHz, HIGH band: 940Hz to 24kHz.
• 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.

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