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MPA Series Amplifiers MPA Series Owner's Manual

MPA Series Brochure

The MPA Professional Audio Amplifier Series is specifically matched to the characteristics of JBL speakers.

  • They deliver a wide range of output power to accommodate even JBL's most powerful transducers.
  • They exhibit good peak power capability and excellent dynamic headroom to accurately reproduce musical transients.
  • Each amplifier includes a protective output limiter to protect both the amplifier and the loudspeaker form excessive power.
  • The limiting action curve is perfectly matched to JBL transducers taking full advantage of their low power compression characteristics.
  • The action of the limiter does not "rob" the system of acoustic power since the total output of a heavily distorted amplifier is the same as the "limited" MPA amplifier, but with extremely clean, non-distorted sound.
  • Open Input Architecture™: JBL systems philosophy also extends to the input stage of the amplifier. Flexible input cards allow these amplifiers to be tailored to a variety of applications, and configurations can be changed easily as new situations arise.
4 Ohm/Ch:
1200 W* 800 W 660 W 400 W 275 W
8 Ohm/Ch:
820 W* 550 W 440 W 275 W 175 W
8 ohm bridge:
2400 W* 1600 W 1320 W 800 W 550 W
2 Ohm/Ch:
1520 W* 1100 W 960 W 600 W 400 W
4 Ohm/Ch:
1320 W* 900 W 740 W 450 W 325 W
8 Ohm/Ch:
880 W* 600 W 480 W 300 W 200 W
Voltage Gain:
80 (38 dB) 63 (36 dB) 56 (35 dB) 45 (33 dB) 35.5 (31dB
Net Weight:
29 kg (64 lbs) 24.8 kg (55 lbs) 20 kg (44 lbs) 19.1 kg (42 lbs) 18.1 kg (40 lbs)
Shipping Weight:
31.8 kg
(70 lbs)
26.8 kg
(59 lbs)
22.2 kg
(49 lbs)
21.2 kg
(47 lbs)
20.4 kg
(45 lbs)
*Amplifier's output protective circuitry prevents full power output above 15kHz.

**Rated Power:  is minimum continuous sine wave output per channel, with both channels driving their rated load over a power bandwidth of 20 Hz to 20 kHz. Maximum total harmonic or intermodulation distortion measured at any power level from 250 milliwatts to rated power is less than 0.1%. Maximum Transient Intermodulation Distortion is less than 0.05%.

***Midband Power:  is maximum output per channel, with both channels driven, at onset of clipping with 1 kHz sine wave, THD 1%

Distortion: SMPTE-IM, less than 0.05%
Frequency Response: 20 Hz to 20 kHz, +0.1 dB, 8 Hz to 100 kHz, +0/-3 dB
Damping Factor: Greater than 200
Dynamic Headroom: 3 dB at 4 ohms (2 dB for MPA 275)
Noise: 100 dB below rated output (20 Hz to 20 kHz)
Sensitivity: 1 Vrms for rated power (8 ohms)
Input Impedance: 10 kOhms unbalanced, 20 kOhms balanced
Controls: Front: AC switch, Ch 1 & Ch2 Gain (2 dB detents). Rear panel switch for parallel inputs or bridged output configuration.
INDICATORS: (each channel)
Power: Green LED
Signal Present: Green LED
Level -20: Green LED
Level -10: Yellow LED
Clip: Red LED
Protect: Red LED (flashes for over-temp)
CONNECTORS: (each chan., except one stereo Speakon)
Input: Barrier strip and XLR
Speakers: 5-way binding posts, Speakon connectors, st. Speakon (for mating cable, use Neutrik NL4FC connector)
Cooling: Continuously variable speed fan, rear-to-front air flow
Amplifier Protection: Full short circuit (Output Averaging™ short circuit protection US Patent 4,321,554), open circuit, ultrasonic, and RF protection, thermal limiting, muting; stable into reactive or mismatched loads
Load Protection: On/off muting, clip limiting, DC-fault load grounding relay with internal fault fuses
Output Circuit Type: Complementary linear, high-efficiency outputs: 3-step on MPA1100, 2-step on MPA750, MPA600 and MPA400, 1-step on MPA275
Power Requirements: 100, 120, 230 Vac. 50-60 Hz
Power Consumption: (@ 120 Vac) Normal Operation: 4 ohms per channel
All models: less than 12 A, (1.44 kW)
Max. (full power, 2 ohms/channel): MPA1100, 41A (5kW); MPA750, 58A (7kW); MPA600, 32A (3.9kW); MPA400, 24A (2.9kW); MPA275 18A (2.2kW)
Dimensions: 48.3 cm (19in) rack mounting
45.5 cm (17.9in) deep (rear support ears)
MPA1100 & MPA750 are 13.3 cm (5 1/4in) tall (3 spaces); MPA600, MPA400 & MPA275 are 8.9 cm (3 1/2in) tall (2 spaces)
OPTIONS: (Input Modules)
IM-10 Two-channel, two-way crossover card provides multi-way active selectable frequency division with adjustable time delay for transducer alignment and equalization for both 2360 and 2380 horns
IM-11 18dB/octave sub-bass crossover card provides subsonic filter at 30 or 40 Hz, crossover frequencies of 80, 120 or 250 Hz with external highpass outputs
IM-12 Cinema crossover module features 24dB/octave filter slopes, crossover frequencies of 500 and 800 Hz, time delays for transducer offset alignment, horn equalization for 2360 and 2380 series horns and screen loss equalization
IM-30 Input connector expansion module provides parallel XLR and TRS 1/4" phone connector inputs and outputs

Copyright 2001 JBL Professional.
All rights reserved.