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QSC Audio SPA-3 specifications Stereo Precision Attenuator, Basic Description, ISA models

Models: SPA-3

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P E R F O R M A N C E A C C E S S O R I E S

P E R F O R M A N C E A C C E S S O R I E S

SPA-3

Stereo Precision Attenuator

Basic Description

The SPA-3 is an externally mounted two-channel precision attenuator accessory for DataPort-equipped QSC amplifiers. With pushbutton pro- gramming and digital gain control, it offers precise, secure, and repeat- able attenuation settings from 0 to 32 dB. It features optional input iso- lation transformers custom-made for QSC by Jensen, providing superb common-mode noise rejection for high-performance sound systems.

The SPA-3 mounts directly to the rear panel of two-channel CX, DCA, and PowerLight 2 Series amplifiers. For use with four-channel models or with PowerLight amplifiers, the accessory can be mounted on an acces- sory rack-mount panel and connected to the amplifier via a VGA-type extension cable (with pin 9). See below for a more detailed list.

Compatible amplifier models
•Two-channel CX, DCA, and base PL2 models

•Four-channel CX and DCA models (via connecting cable)

•ISA models

•PowerLight models (via DPX-2 connecting cable and with DPX-1 external power supply; use DPX-4 accessory mounting bracket)

Features

•Precisely attenuates signal up to 32 dB in increments as small as 0.5 dB

•Selectable increment scaling: 0.5 or 1 dB

•Low-noise, low-distortion, high-performance digital gain controls

•DataPort connectivity
•Balanced “Euro-style” inputs

•Optional high-performance input transformers to precisely balance and isolate amplifier inputs for superb noise rejection

•Channels can be independently muted, bypassed, or locked

•Easy to install
Specifications subject to change without notice.

SPA-3, shown with optional XF-1 transformers installed

1675 MacArthur Boulevard Costa Mesa, CA 92626

Ph: 800/854-4079 or 714/957-7100

Fax: 714/754-6174 www.qscaudio.com

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QSC Audio SPA-3 specifications Stereo Precision Attenuator, P E R F O R M A N C E A C C E S S O R I E S, Basic Description
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FAQ

What are the compatible amplifier models for the SPA-3?

The compatible amplifier models for the SPA-3 include two-channel CX, DCA, and base PL2 models, four-channel CX and DCA models via connecting cable, ISA models, and PowerLight models via DPX-2 connecting cable and with DPX-1 external power supply with the use of a DPX-4 accessory mounting bracket.

What are the features of the SPA-3?

The SPA-3 precisely attenuates the signal up to 32 dB in increments as small as 0.5 dB, with selectable increment scaling of 0.5 or 1 dB. It also features low-noise, low-distortion, high-performance digital gain controls, DataPort connectivity, balanced Euro-styleinputs, optional high-performance input transformers, and the ability to independently mute, bypass, or lock channels.

How can the SPA-3 be installed?

The SPA-3 mounts directly to the rear panel of two-channel CX, DCA, and PowerLight 2 Series amplifiers. For use with four-channel models or with PowerLight amplifiers, it can be mounted on an accessory rack-mount panel and connected to the amplifier via a VGA-type extension cable with pin 9.