Biamp MPA250 User Manual

MPA250

Multi-Purpose Amplifier

MPA250 single-channel, multi-purpose ampliers deliver a full 250 Watts of power into direct or
distributed speaker systems. The MPA250 is designed for reliable service in permanent installations,
and comes complete with short-circuit and thermal protection, including front/rear panel indicators and
automatic reset. Plug-in barrier strip input and screw terminal outputs provide trouble-free, dependable
connections. MPA250 ampliers are UL listed and carry Biamp’s ve-year warranty.

FEATURES

• 250 watts at all outputs (4Ω direct & transformer)

• internal transformer (8Ω, 70V, 25V, & 25V-CT outputs)

• signal/peak & temp/fault indicators on front & rear panels

• balanced/unbalanced input selector on rear panel

• level control & input sensitivity selector on rear panel

• high-pass lter selector on rear panel (12dB/oct. @ 125Hz)

• input on plug-in barrier - outputs on screw terminals

• short-circuit & thermal protection with automatic reset

• variable speed fan (quiet, reliable - no lter maintenance)

• RoHS compliance and AES grounding practices

• UL / C-UL listed

• covered by Biamp Systems’ ve-year warranty

ARCHITECTS & ENGINEERS SPECIFICATION

The power amplier shall provide single channel, reliable continuous power of 250 Watts at a 4 ohm direct output. This same
250 Watts shall also be available, via an internal transformer, at 8 ohm, 70V, 25V, & 25V-CT outputs. Output connections shall be
on rear panel screw terminals. Input connection shall be on rear panel plug-in barrier strip. Balanced or unbalanced input shall be
selectable via rear panel switch. Input sensitivity, of either 775mV or 300mV, shall be selectable via rear panel switch, and a screw­driver adjustable level control shall be included. A high-pass lter of 12dB/octave @ 125Hz shall be selectable via rear panel switch.
Short-circuit and thermal protection circuitry shall be provided, with automatic reset. Signal/peak and temp/fault indicators shall be
provided on both front and rear panels. Amplier cooling shall be by means of an internal variable speed fan, which shall require no
lter or associated maintenance.
Frequency Response shall be +0/-1dB from 20Hz to 20kHz. THD shall be less than 0.2% from 20Hz to 20kHz at rated power to
the 4 ohm direct output, and less than 1.0% from 100Hz to 15kHz at rated power to any transformer output. Signal-to-Noise Ratio
shall be greater than 90dB from 20Hz to 20kHz at rated power to the 4 ohm direct output. Power consumption shall be less than
900 Watts. Dimensions shall be 3.5 inches (2 rack spaces) high, 19 inches wide, and 8.5 inches deep. Weight shall be 23 lbs. The
amplier shall be UL/C-UL listed and shall incorporate AES48-2005 Grounding & EMC practices. The amplier shall be compliant with
EU Directive 2002/95/EC, the RoHS directive. The amplier shall carry a ve-year warranty.
The amplier shall be a BIAMP MPA250.

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] www.biamp.com

MPA250 SPECIFICATIONS

Continuous Power (4 ohm direct & transformer outputs): 250 watts

Signal-to-Noise Ratio (20Hz~20kHz):

referenced to 250 watts into 4 ohm direct output >90db

Total Harmonic Distortion:

20Hz~20kHz @ 250 watts into 4 ohm direct output <0.2%

100Hz~15kHz @ 250 watts at transformer outputs <1.0%

Intermodulation Distortion (SMPTE): <0.35%

Frequency Response (20Hz~20kHz): +0/-1db

Input Sensitivity (selectable): 775mV / 300mV

Input Impedance:

balanced 20k ohms

unbalanced 10k ohms

Power Requirements: 120VAC @ 60Hz

Power Consumption: 900 watts

Dimensions (H x W x D): 3.5” x 19” x 8.5” (89 x 483 x 216mm)

Weight: 23 lbs. (10.5kg)

Compliance: AES48-2005 Grounding & EMC practices

EU Directive 2002/95/EC, RoHS directive

UL/C-UL listed

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] www.biamp.com

17Dec08