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Operating Manual -4048A digital signal processor
1. INTRODUCTION
Your new 4048A is a flexible four input/eight output digital signal processor capable of precise control of a
broad range of audio functions. Because it has no user controls, it is ideal for applications where real-time changes are
unlikely or when tamper-proof security is required. All adjustments are made using Altec Lansing Maestro™ soft-
ware for Windows™.
The 4048A utilizes state of the art DSP technologies, beginning with 24 bit, 48kHz delta-sigma A/D convert-
ers with 128x oversampling. Audio processing includes Gain, Parametric EQ, Signal Routing, Crossover Functions,
Time Delay, Compressor/Limiter, and Polarity Invert, all taking place in twin high performance Motorola DSP proces-
sors. D/A conversion uses 24 bit delta-sigma converters with 128x oversampling. All input and output connections are
precision balanced and RF protected using "Euro-Block" style two piece terminal block connectors.
2. UNPACKING
As a part of our system of quality control, every Altec Lansing product is carefully inspected before leaving
the factory to ensure flawless appearance. After unpacking, please inspect for any physical damage. Save the shipping
carton and all packing materials, as they were carefully designed to minimize the possibility of transportation damage
should the unit again require packing and shipping. In the event that damage has occurred, immediately notify your
dealer so that a written claim to cover the damages can be initiated. The right to any claim against a public carrier can
be forfeited if the carrier is not notified promptly and if the shipping carton and packing materials are not available for
inspection by the carrier. Save all packing materials until the claim has been settled.
3. AC POWER REQUIREMENTS
Note: The AC power switch for model 4048A is on the back panel. The Altec Lansing 4048A uses a
universal input power supply which will accept any line voltage in the range of 80VAC to 260VAC, 50-60Hz, and is
exceptionally resistant to voltage dips, or "brown outs". A standard IEC-320 grounded AC inlet is provided on the rear
panel to accept the detachable power cord. Never remove the AC earth ground connection to the 4048A. In the
event of an internal fuse failure, refer the product to a qualified service technician for fuse replacement, replacing only
with the same type and rating fuse, 0.5A time delay Littlefuse 218.500 or equivalent.
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