Bose | PM8250N | PowerMatch 8250/8250N Power Amplifiers Tech data sheet

PowerMatch® PM8250 / PM8250N
configurable power amplifier
Key Features
The Bose® PowerMatch PM8250 configurable professional
power amplifier provides concert-quality sound with a high
level of scalability and configurability. The PM8250 offers
multiple channel and power options, an integrated audio
DSP, front panel interface and USB connection. Ethernetequipped versions enable network configuration, control and
monitoring. An expansion slot supports inputs from optional
digital accessory cards. PowerMatch amplifiers utilize
numerous Bose technologies to deliver an unprecedented
combination of performance, efficiency and ease of
installation—all in a reliable, proprietary design. Available
in two versions, the PM8250 provides USB connection for
single-unit setup and control using Bose ControlSpace® V3.0
or higher software. The PM8250N adds Ethernet connectivity
for network control and monitoring of multiple “N” version
• QuadBridge™ Technology – Allows each 4-channel
loudspeaker block to be configured as Mono, V-Bridge, IShare or Quad modes, allowing the total available power
of the amplifier block to be allocated to one or more output
channels. The amplifier is capable of driving both low
impedance and 70/100V loudspeaker loads directly.
Designed for a wide range of applications, including:
Houses of worship
Retail stores
Atriums and malls
Auxiliary zones
Conference centers
Hospitality venues
• Bose® ControlSpace® Designer™ software – PowerMatch
amplifiers can be fully configured using ControlSpace
Designer software via the onboard front panel USB
connection, or the rear panel Ethernet connection (network
models only). Using ControlSpace Designer software you
can access additional features including: Parametric EQ
stages, load sweep of each output channel and auto standby.
ControlSpace Designer software is also used to integrate
network model PowerMatch amplifiers into larger control and
monitoring systems comprised of Bose ESP processors and
CC control centers.
Product Overview
• Auto-Standby/Auto-Wake function – When enabled, this
function automatically enters/exits Standby Mode, allowing the
system to consume less power.
• Dual voltage and current feedback loop – Proprietary
design combines Class-D efficiency with a unique current
and voltage feedback loop circuit that continuously monitors
and controls both the current and voltage delivered to the
loudspeaker load. Independent of power level and load
impedance, the amplifier consistently delivers the widest
possible dynamic range, frequency response and lowest
possible distortion.
• PeakBank™ power supply – Regenerative 4-quadrant power
supply enables higher power density while allowing the reuse of energy from reactive loads that is normally wasted in
conventional Class-D designs. This highly efficient amplifier
design delivers sustainable and repeatable low frequency
• Fast-tracking power factor correction (PFC) – Efficiently
manages the current drawn from the AC mains, allowing the
amplifier to drive loudspeakers to maximum output longer
without power fluctuation. PFC provides superior transient
response and functions at peak burst power much longer
than conventional Class-D amplifier designs to satisfy the
requirements of even the most demanding program material.
Bose Professional Systems Division
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
Technical Specifications
Power Rating
THD for Power Rating, Typical
< 0.1 %
< 0.1 %
< 0.1 %
70 V
100 V
Mono Mode
250 W
250 W
250 W
See footnote 3
See footnote 3
V-Bridge Mode
250 W2
500 W
500 W
400 W
500 W
I-Share Mode
500 W
250 W2
150 W2
Not available
Not available
Quad Mode
1000 W2
1000 W
500 W2
800 W
1000 W
Maximum Rated Power
2000 W (250 W x 8 channels at 4 ohms)
Peak Output Voltage
71 / 142 V (Mono / V-Bridge, I-Share, and Quad modes)
Voltage Gain
30 / 33 / 30 / 33 dB (Mono / V-Bridge / I-Share / Quad modes)
Audio Performance Specifications
Frequency Response
20 Hz - 20 kHz (at 1 W and +/- 0.5 dB)
Signal-to-Noise Ratio, Analog Input
>99 dB (1 dB below rated power, A-weighted)
< 0.4 % (at 1 W, 20 Hz to 20 kHz)
Intermod Distortion - SMPTE
< 0.4 % (60 Hz, 7 kHz)
Channel Separation (Crosstalk)
> 65 dB (adjacent channels, at 1 kHz)
Damping Factor
> 1000 (10-1000 Hz, 4 ohms, at amplifier output)
Integrated DSP
A/D and D/A Converters
48 kHz / 24-bit
Total Latency (Analog In - Amp Out)
< 0.95 ms
Input to Output Signal Routing
8 x 8 matrix
Loudspeaker Presets
Bose Professional
Input EQ
5-band PEQ (+/- 20 dB), notch, shelving, high pass, low pass
Bandpass Filters (Crossover)
Butterworth, Bessel, or Linkwitz-Riley, up to 48 dB/octave
Loudspeaker EQ
9-band PEQ (+/- 20 dB), shelving, high pass, low pass, 2-band RoomMatch® array EQ
Maximum Output Delay
Output Limiter
Peak and RMS voltage
Audio Inputs
Input Channels
8 (balanced line level)
Digital (Optional Card)
Input Impedance
> 100 kΩ
0, +4, +12, +24 dBu, selectable
Digital: 0, -12, -20, -24 dBFS, selectable
Maximum Input Level
+24 dBu (at 24 dBu sensitivity setting)
Connectors, Input
3-pin Phoenix Contact® (green color; part # 1776168)
Card Dependent
Audio Outputs
Output Channels
2 to 8 (configurable)
Connectors, Output
8-pin Phoenix Contact® connectors (part # 1778120), supports 10-24 AWG wire
Indicators and Controls
LED Status Indicators
Signal, limit, clip, fault
User Interface Controls
Mute, input sensitivity, output attenuation, EQ on/off, preset select. 240 x 64 LCD. Additional controls available w/ ControlSpace® Designer™
Electrical Specifications
Mains Voltage
100-240 V (50/60 Hz)
Mains Circuit Recommendation
15A (120 V) or 10A (230 V)
Mains Connector
IEC 60320-C14 (Inlet)
Minimum AC Line Voltage
80 V (reduced output power)
Maximum Inrush Current
15.4 A (230 VAC, 50 Hz)
Maximum RMS Current Draw
Efficiency, 1/3 Rated Power
> 68 % (pink noise input signal)
Output Stage Topology
Overload Protection
High temperature, DC, HF, short, voltage limiter, current limiter, inrush current, mains circuit breaker protection
Net Weight
3.5" H x 19" W x 20.7" D (88 mm x 483 mm x 525 mm) - 2 rack space
28.3 lb (12.8 kg)
Mounting Depth
21" (533 mm)
Operating Temperature
32 °F - 104 °F (0 °C - 40 °C)
Cooling System
Microprocessor-controlled, variable-speed fans, front to rear airflow
Bose Professional Systems Division
Shipping Weight: 34 lb (15.4 kg)
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
Setup and Configuration Software
ControlSpace® Designer™ software V3.2 or greater
PC Interface Connection
USB (Network version adds Ethernet RJ45)
Fault Notification Output
NC/NO Relay Contact (1 A, 30 VDC), 3-pin Phoenix Contact® connector (orange color; part # 1976010)
Output power is measured per channel, all channels driven, using test signals at 1 kHz.
Configuration not recommended / not optimal.
Limited use available. Tap 70V loudspeakers 2x the desired power. Tap 100V loudspeakers 4x the desired power.
Measured at +24 dBu sensitivity unless otherwise specified.
Bose Professional Systems Division
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
1. LED Indicators - Fault, Clip, Limit and Signal indication
2. LCD Display - Detailed graphical backlit display
3. Navigation Soft Key - Front panel interface navigation key
4. Rotary Encoder - Scroll to move LCD display cursor, push to select option
5. Menu Soft Keys (1 – 5) - Five pushbuttons mapping to onscreen selections
6. USB connector - Type B USB port for use with a PC running ControlSpace® Designer™ software
7. Front airflow vents - Filterless intake cooling for the amplifier
8. Front rack-mount ears - For use when securing into rack-mount enclosures
1. Analog Input connectors - Line-level balanced input connectors (+24 dBu max)
2. Fault-Notification Output - 3-pin normally open or normally closed contact closure fault connection (1A, 30 VDC max)
3. Ethernet network connector (network versions only) - RJ-45 connection supporting ControlSpace Designer software and Serial
over Ethernet communications
4. Rear airflow vents - Exhaust venting
5. Digital expansion slot cover - Supports optional ESPLink and digital audio network cards
6. Output connector - Loudspeaker connections (10 - 24 AWG)
7. AC Mains receptacle - Power cord connection (IEC 60320-C14 Inlet)
8. AC Mains retention clip - Secures the power cord to the amplifier
9. Power switch - ON/OFF AC power switch. Also serves as resettable circuit breaker
10. Rear rack-mount support tabs - Accommodates rear brackets for rear rail mounting
Bose Professional Systems Division
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
Mechanical Diagrams
Back View
Front View
Bose Professional Systems Division
Right View
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
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 eight independent amplifier channels,
which can be configured to allocate the 2000 watts total rated
output power between 2 and 8 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 8.1 amps with 120 VAC and 4.1
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 8
channels, 250 watts into 4 and 8 ohms. V-Bridge mode with
up to 4 channels, 500 watts into 4 ohms, 8 ohms, or with 100V
lines (at 1% THD), 400 watts with 70V lines (at 1% THD). IShare mode with up to 4 channels, 500 watts into 2 ohms.
Quad mode with up to 2 channels, 1000 watts into 4 ohms or
with 100V lines (at 1% THD), 800 watts with 70V lines (at 1%
• 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
• Channel Separation (adjacent channels at 1 kHz): greater than
65 dB
• Damping Factor (10 – 1000 Hz, 4 ohms): greater than 1000
The amplifier shall incorporate eight 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
8 digital audio channels using optional digital expansion cards,
available in proprietary and industry-standard protocols. The
amplifier outputs shall terminate with 8-pin, high-current, terminalblock connectors, which accept 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 eight channels:
5-band parametric input EQ, array EQ, bandpass (crossover)
filters, 9-band parametric output EQ, delay, output peak and
RMS-average limiter. An 8x8 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
(PM8250N 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 19inch (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 28.3 pounds (12.8 kg).
Architects’ and Engineers’
The amplifier shall be the Bose PowerMatch® PM8250
(PM8250N) 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® PM8250
PowerMatch PM8250 - US
PowerMatch PM8250 - AU
PowerMatch PM8250 - JPN
PowerMatch PM8250 - EU
PowerMatch PM8250 - UK
PowerMatch® PM8250N
(Network model)
PowerMatch PM8250N - US
PowerMatch PM8250N - AU
PowerMatch PM8250N - JPN
PowerMatch PM8250N - EU
PowerMatch PM8250N - UK
Expansion Cards
PowerMatch ESPLink card
PowerMatch Dante™ network card
PowerMatch CobraNet® network card
All information subject to change without notice.
® 2015 Bose Corporation
All trademarks are those of their respective owners.
Bose Professional Systems Division
OF 7
PowerMatch® PM8250 / PM8250N
configurable power amplifier
PowerMatch® AES3 input card
All information subject to change without notice.
® 2015 Bose Corporation
All trademarks are those of their respective owners.
Bose Professional Systems Division
OF 7
Download PDF