JBL MPA750
The JBL MPA750 is a professional two-channel power amplifier built for installed sound systems. It is a no-frills, rack-mounted workhorse of the kind you'd find driving speakers in a bar, restaurant, or small venue. The record is thin. Production years and original pricing aren't documented anywhere we've found. A 1997 issue of EQ Magazine (October 1997, p.116) covers the MPA750's use in a professional stage setup.
What is known comes mostly from the owner's manual and a ProSoundWeb review by a user who put one to work in a pub/restaurant sound system. The amp is rated at 750 watts per channel into 4 ohms, and 1500 watts bridged into 8 ohms. It uses a Class H topology with a variable-speed cooling fan. Inputs are balanced XLR and 1/4" TRS, and outputs are binding posts. A ground lift switch is there for chasing hum. The rear panel also has an RJ-45 connector for phone/Tel input wiring in distributed audio setups, which is an unusual feature and points squarely at its installed-sound intent. The manual also references both Stereo and Bridged operating modes.
The ProSoundWeb review described it as competing with the Crown XTi and QSC RMX series for installed applications. Owner comments in that same thread were positive but unflashy: "plenty of power, no noise, no hum," "plain, honest, and reliable," and one user reporting five years of service with zero failures. Another forum user mentioned running one in a bar for years without issues. The same thread notes it's a very heavy amp, though no exact weight is recorded.
ProSoundWeb noted the MPA750's straightforward, workaday character — a sentiment echoed by multiple owners. One commenter compared it favorably to the old Peavey CS1200, though that's an owner observation rather than a manufacturer claim.
Known specs:
- 750W per channel @ 4Ω; 1500W bridged @ 8Ω
- Class H topology, variable-speed fan cooling
- Balanced XLR and 1/4" TRS inputs; binding post outputs
- Damping factor >200; frequency response 20 Hz - 20 kHz ±0.5 dB
- Ground lift switch; 120V AC operation
- RJ-45 Phone/Tel input for distributed audio systems
No production years, original MSRP, dimensions, or THD figures have surfaced. The manual is available via manualzz.com, and owners note these can be picked up at very reasonable prices on the used market.
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