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User Guide Page 45
pro.Bose.com
Installation and Operating Guide
Technical Specifications - PM4250 / PM4250N
Power Rating
1
2
Ω
4
Ω
8
Ω
70 V
100 V
THD for Power Rating, Typical
< 0.1 %
< 0.1%
< 0.1%
1%
1%
Mono Mode
250 W
250 W
250 W
Not available
3
Not available
3
V-Bridge Mode
250 W
2
500 W
500 W
400 W
500 W
I-Share Mode
500 W
250 W
2
150 W
2
Not available
Not available
Quad Mode
1000 W
2
1000 W
500 W
2
800 W
1000 W
Maximum Rated Power
1000 W (total all channels)
Peak Output Voltage
71 / 142 / 142 V
Voltage Gain
30 / 33 / 30 / 33 dB (Mono / V-Bridge / I-Share / Quad modes)
Audio Inputs
Analog
Digital (Optional Card)
Input Channels
4 (balanced line level)
4, selectable range
Input Impedance
> 100 k
Ω
N/A
Sensitivity
0, +4, +12, +24 dBu, selectable
Digital: 0, -12, -20, -24 dBFS, selectable
Maximum Input Level
+24 dBu (at 24 dBu sensitivity setting)
N/A
Connectors, Input
3-pin Phoenix Contact
®
(green color; part # 1776168)
Card Dependent
Audio Outputs
Output Channels
1 to 4 configurable
Connectors, Output
8-pin Phoenix Contact connector (part # 1778120), supports 10-24 AWG wire
Electrical Specification
Mains Voltage
100-240 V (50/60 Hz)
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
4 A
Efficiency, 1/3 Rated Power
> 66 % (pink noise input signal, typical)
Output Stage Topology
Class-D
Overload Protection
High temperature, DC, HF, short, voltage limiter, current limiter, inrush current, mains circuit breaker protection
Physical
Dimensions
3.5" H x 19" W x 20.7" D (88 mm x 483 mm x 525 mm) - EIA-310 standard width, 2RU height
Net Weight
24.4 lb (11.1 kg)
Shipping Weight
30.0 lb (13.6 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
(1) Output power is measured per channel, all channels driven, using test signals at 1 kHz.
(2) Configuration not recommended / not optimal.
(3) Derated use available. Refer to the application note "Using MONO Mode (single channel) to Drive High Impedance Loudspeaker Loads".