Altec lansing 4048A User Manual

4048A

4 Input / 8 Output Digital Processor

FEATURES –

• 8 Filters per Input, 6 Filters + LP/HP per Output

• Crossover, EQ, All-Pass Filter, Delay and Comp/Limiter

• Link Bus for Output Comp/Limiters

• Matrix-Sum Any Input to Any Output(s)

• Servo-Balanced Outputs

• No Front Panel Controls

• Contact Closure for Recall of 8 Presets

• Five Year Warranty

GENERAL PRODUCT DESCRIPTION

Altec Lansing’s 4048A digital processor is a professional matrix solution for your permanent audio system install needs. The 4048A features four (4) balanced line-level inputs and eight (8) balanced line-level outputs. Any input can be routed and summed to any output or combination of outputs. Mute, gain and EQ controls are found on all inputs and outputs. High/low pass filters, delays, polarity invert and compressor/limiters are on the outputs. Output compressor/limiters can be linked for smooth concurrent operation.

There are no front panel controls to entice dedicated meddlers. Set up and Programming the 4048A is only through the Altec Lansing Maestro software (included). RS-232 serial ports are located on the front and back to improve ease of field service. Eight (8) of the eighteen (18) presets can be recalled using a simple contact closure. All inputs are electronically balanced and all outputs are active servo-balanced.

All inputs and outputs use a Euroblock connector located on the back panel. System integrators and consultants will appreciate these connectors as they allow bare wire to be easily connected to the 4048A without expensive connectors and soldering.

APPLICATIONS

The Altec Lansing 4048A can be used to drive 4 two-way active floor monitors from 4 monitor mixes. It can drive a three-way mono main and 3 floor monitor mixes, or stereo two-way mains and a mono sub with stereo delays. The 4048A can be a fourroom combining system with extra outputs for recording or media sends. The versatility of this processor makes it a perfect choice for audio systems in auditoriums, Houses of Worship, meeting rooms, and rental applications.

4048A Revision 01

THE ALTEC LANSING DIFFERENCE

Phone: 1.405.848.3108 y Fax: 1.405.848.3217 y Email: proinfo@alteclansing.com

GENERAL SPECIFICATIONS

INPUTS . . . Active Balanced, 18k ohms

Maximum Input Level: +20dBu

OUTPUTS . . . Active Servo Balanced, 112 ohms

Maximum Output Level: +20dBu

INPUT & OUTPUT GAIN: +12/-40dB, 0.1dB increments

FREQUENCY RESPONSE . . . 20Hz – 20kHz, +

THD . . . <0.01% @ 1kHz, +20dBu

DYNAMIC RANGE . . . >110dB (20Hz – 20kHz) unweighted

OUTPUT NOISE . . . <-90dBu unweighted

EQ FILTERS: 8 per Input, 6 per Output

Parametric Bandwidth . . .1/64

Range . . .+15/-30dB, 0.1dB increments

Resolution . . .1/96

Low-Shelf Slope . . .Selectable 6 or 12dB/Octave

Freq. Range . . .19.7Hz to 2kHz, 1/96

Range . . . +

High-Shelf Slope . . . Selectable 6 or 12dB/Octave

Freq. Range . . . 3.886kHz to 20.9kHz, 1/96

Range . . . +

All-Pass Frequency Range . . .19.7Hz to 21.9kHz, 2

CROSSOVER FILTERS:

High-Pass Type . . . Linkwitz-Riley, Bessel, Butterworth

Slope . . . 12, 18 and 24dB/Octave

Freq. Range . . . 19.7Hz to 21.9kHz and Off, 1/96

Low-Pass Type . . . Linkwitz-Riley, Bessel, Butterworth

Slope . . . 12, 18 and 24dB/Octave

Freq. Range . . . 19.7Hz to 21.9kHz and Off, 1/96

OUTPUT DELAY: 682.5ms maximum, 20µs steps

OUTPUT POLARITY: 0 or 180 degrees

COMPRESSOR/LIMITER:

Threshold . . . -20dBu to +20dBu, 1.0dB increments

Ratio . . . 1.2:1, 1.5:1, 2:1, 3:1, 4:1, 6:1,

10:1, 20:1, Infinite:1

Attack . . . 0.5ms to 50ms per dB

Release . . . 10ms to 1 sec per dB

PROCESSOR:

Input A/D and Output A/D . . . 24 bit

Processor . . . 24 bit, 56 bit accumulator

Sample Rate . . . 48kHz

Propagation Delay . . . 1.46ms

15dB, 0.1dB increments

Octave to 4 Octave

Octave

0.25dB

Octave

Order

Oct.

Rear Panel View

OTHER:

Input LED Indicators

Sig . . . green (-20dB), amber (0dB), red (+20dB clip)

Mute . . . red

Output LED Indicators

S/L . . . green (-20dB),

amber (limiter threshold),

red (+20dB clip)

Mute . . . red

RS-232 Cable Distance . . . max. 1300 feet (396m)

Power Requirements . . . 80 – 260VAC, 30W max.

Net Weight . . . 6 lbs (2.7 kg)

Shipping Weight . . . 8.0 lbs (3.6 kg)

Dimensions . . . 19.0”W x 1.75”H x 6.0”D

(48.3cm x 4.4cm x 15.2cm)

Environmental . . . 40 – 120 deg. F, Non-Condensing

(4 – 49C)

* 0dBu = 0.775V rms

As we are continually striving to improve Altec Lansing products,

specifications are subject to change without notice.

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS

The digital processor shall have four inputs that can be routed to any or all eight outputs. Each input shall include mute on/off, gain adjustment from +12dB to -40dB and 8 filter stages selectable for high/low shelving, parametric or all-pass type filters. All inputs shall be electronically balanced with Euroblock connectors. Maximum input level shall be +20dBu. Input LED indicators on the front panel shall show signal present, 0dB level, +20dB clip and mute.

Any input or combination of inputs shall be assignable to any output or combination of outputs.

Each output shall include high/low pass crossover, 6 filter stages selectable for high/low shelving, parametric or all-pass type filters, a delay stage (682ms max), gain adjustment from +12dB to -40dB with ability to phase invert, a full-function compressor/limiter and mute. All outputs shall be active servo balanced with Euroblock connectors and maximum output level shall be +20dBu. Output LED indicators on the front panel shall show signal present, limiter threshold, +20dB clip and mute.

Frequency response of the 4048A shall be 20Hz to 20kHz, + with dynamic range greater than 110dB (20Hz – 20kHz, unweighted) and SMPTE IM or THD shall be less than 0.01% at 1kHz, +20dBu.

Complete programming of the 4048A shall be from the front or back panel accessible RS-232 serial port using Altec Lansing’s Maestro software. There shall be 18 internal presets that can be overwritten by the user and stored and presets 1 – 8 shall be capable of external recall via momentary or latched switch contact.

The digital processor shall be 1 rack space and must be fully covered with a five year warranty. The dimensions shall be 19 inches (48.3cm) wide by 1.75 inches (4.4cm) high by 6.0 inches (15.2cm) deep. The unit shall weigh 6.0 pounds (2.7 kg). The digital

processor shall be the Altec Lansing Professional model 4048A

0.25dB

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4048A Revision 01

Phone: 1.405.848.3108 y Fax: 1.405.848.3217 y Email: proinfo@alteclansing.com