Bose PM4250 User Manual download pdf (Page 6)

PowerMatch® PM4250 / PM4250N

configurable power amplifier

TECHNICAL DATA SHEET

All information subject to change without notice.

® 2015 Bose Corporation

All trademarks are those of their respective owners.

Bose Professional Systems Division

OF 7

pro.Bose.com

Architects’ and Engineers’

Specifications

The amplifier shall contain all solid-state circuitry, using MOSFET

output devices employing Class-D topology and a current and

voltage feedback loop circuit. The amplifier shall incorporate

a switch-mode power supply with fast-tracking power factor

correction (PFC) that will allow full-rated power from AC outlets

ranging from 100 - 240 V, 50/60 Hz. The amplifier shall have an

IEC 60320-C14 10/15-amp electrical power inlet and shall be

equipped with a removable power supply cord. The amplifier

shall include protection from shorted and open loads, general

overheating, DC, high-frequency overloads, under/over voltage

and internal faults.

The amplifier shall contain four independent amplifier channels,

which can be configured to allocate the 1000 watts total rated

output power between 1 and 4 channels. The amplifier shall

contain variable speed fans, which are automatically controlled

to minimize acoustic noise. Fan airflow direction will be from the

front panel to the rear panel and should not require air filtering.

Rack mounting of multiple amplifiers shall be possible without

extra rack spacing for ventilation. The amplifier shall be capable

of continuous operation at 1/3 of rated power into 4-ohm loads,

in ambient temperatures up to 104° F (40° C). The typical current

draw at 1/3-rated power shall be 4.2 amps with 120 VAC and 2.2

amps with 230 VAC.

The power amplifier shall meet or exceed the following

performance specifications:

• Analog input sensitivity for rated output: 0, +4, +12 and +24

dBu, user selectable

• Rated output power, per channel, with all channels driven at

less than 0.1% THD, typical (1 kHz): Mono mode with up to 4

channels, 250 watts into 4 and 8 ohms. V-Bridge mode with

up to 2 channels, 500 watts into 4 ohms, 8 ohms, or with 100V

lines (at 1% THD), 400 watts with 70V lines (at 1% THD). I-

Share mode with up to 2 channels, 500 watts into 2 ohms.

Quad mode at 1 channel, 1000 watts into 4 ohms or with 100V

lines (at 1% THD), 800 watts with 70V lines (at 1% THD)

• Frequency Response (±0.5 dB at 1 watt): 20 Hz to 20 kHz

• Signal-to-Noise Ratio (below rated power, A-weighted with +24

dBu analog input sensitivity) >99 dB

• Total Harmonic Distortion (1 watt from 20 Hz to 20 kHz): less

than 0.4%

• Intermodulation Distortion (SMPTE 60 Hz and 7 kHz): less than

0.4%

• Channel Separation (adjacent channels at 1 kHz): greater than

65 dB

• Damping Factor (10 – 1000 Hz, 4 ohms, measured at amplifier

output): greater than 1000

The amplifier shall incorporate four balanced analog inputs, with

rear-panel mounting and utilizing 3-pin terminal block connectors.

The analog inputs shall support up to +24 dBu input signals.

The amplifier shall support a digital expansion slot capable of

receiving 4 digital audio channels using optional digital expansion

cards, available in proprietary and industry-standard protocols.

The amplifier outputs shall terminate with an 8-pin, high-current,

terminal-block connector, accepting 10-22 AWG cables.

The amplifier shall include digital signal processing (DSP)

optimized for loudspeaker processing, with 24-bit, 48 kHz

operation. The total latency (analog input to amplifier output) shall

be less than 0.95 milliseconds. The fixed-block signal processing

shall include the following elements for each of the four channels:

5-band parametric input EQ, array EQ, bandpass (crossover)

filters, 9-band parametric output EQ, delay, output peak and

RMS-average limiter. A 4x4 matrix mixer shall be included for

routing and attenuation of any input/output combination. A signal

generator supporting tone, noise and sweep functions shall be

included, which shall also enable the amplifier to measure, record,

and store automated impedance sweeps on any output channel.

The amplifier front panel shall contain a user interface with a 240

x 64 LCD primary display, with LED indicators for signal present,

input clipping, output limiting and fault. Functions accessible from

the front-panel interface shall include output configuration, fault

logging, mute, input sensitivity selection, output attenuation, EQ

on/off per channel and loudspeaker processing preset recall.

The amplifier shall contain a PC interface with a front-panel USB

connection, which will allow full amplifier setup, configuration

and monitoring using Bose ControlSpace® Designer™ software

(PM4250N model only). The network version amplifier shall also

contain a rear-panel Ethernet interface available from an RJ45

connector to allow serial over Ethernet communications and

network control/monitoring of multiple network version amplifiers

when using a PC running Bose ControlSpace Designer software.

The amplifier chassis shall be constructed of steel with a durable

black finish. The dimensions of the amplifier shall allow for 19-

inch (483 mm) EIA standard rack mounting. The amplifier shall be

3.5 inches (2RU, 88 mm) in height, and 20.7 inches (525 mm) in

depth. The amplifier shall weigh 24.4 pounds (11.1 kg).

The amplifier shall be the Bose PowerMatch PM4250 (PM4250N)

configurable professional power amplifier.

Safety and Regulatory Compliance

PowerMatch configurable professional power amplifiers comply

with CE requirements, are cUL listed according to UL60065

(7th edition) and CAN/CSA C22.2 No. 60065-03; CB approved,

according to IEC60065 (7th edition), including group and national

differences. These models also comply with FCC Part 15B Class

A, Canadian ICES-003 Class A, EN55103-1, EN55103-2, and

CISPR13 requirements.

Product Codes

PowerMatch® PM4250

PowerMatch PM4250 - US 361816-1110

PowerMatch PM4250 - AU 361816-2110

PowerMatch PM4250 - JPN 361816-3110

PowerMatch PM4250 - EU 361816-4110

PowerMatch PM4250 - UK 361816-5110

PowerMatch® PM4250N

(Network model)

PowerMatch PM4250N - US 361815-1110

PowerMatch PM4250N - AU 361815-2110

PowerMatch PM4250N - JPN 361815-3110

PowerMatch PM4250N - EU 361815-4110

PowerMatch PM4250N - UK 361815-5110

Expansion Cards

PowerMatch ESPLink card 349898-0110

PowerMatch Dante™ network card 359844-0020

PowerMatch CobraNet® network card 345975-0110

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Bose PM4250 User Manual Page 6

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