Boulder 2150 Monoblock Power Amplifier

Boulder's most powerful continuously manufactured amplifier: 1000W into any load Computer designed surface-mount circuit boards secured in custom-machined frames, each damped to eliminate mechanical distortion Dual toroidal transformers, potted and installed in a welded steel enclosure: transformer hum is not permitted Boulder Link for turn-on and turn-off of amplifiers and to send status messages to the display of any Boulder preamplifier 12V trigger connection for remote turn-on by most surround-sound processors and control systems Two 99H2 gain stages (one for + audio and one for - audio), a third-generation descendent of the 990 gain stage used in recording and broadcast studios world-wide Supervisor board monitors and controls all aspects of the amplifier's operating status Dual gain stage design maximizes bandwidth by incorporating the majority of gain in the first stage Designed as a fully-balanced, true monaural amplifier for ideal loudspeaker interface Full Class-A biasing actively managed with an analog circuit that reduces heat and improves efficiency Massive instant power delivery and damping from 80 bipolar output transistors Dual speaker connections via easy to connect, high-current speaker terminals to accommodate bi-wired loudspeakers

Specifications

Peak Power, 8 Ohms- 1000W

Peak Power, 4 Ohms- 2000W

Peak Power, 2 Ohms- 4000W

THD, 8 Ohms, 1000W- 20-2 kHz: 0.0008%, 20 kHz: 0.0035%

THD, 4 Ohms, 1000W- 20-2 kHz: 0.0009%, 20 kHz: 0.0045%

THD, 2 Ohms, 1000W- 20-2 kHz: 0.0014%, 20 kHz: 0.0090%

Frequency Response- -3dB @ 0.015 Hz, 200 kHz

Equivalent Input Noise (EIN), 20 KHz BW- 1.5 μV

Magnitude Response, 20 to 20 KHz- +0.00, -0.04 dB

Magnitude Response, -3 dB at- 0.015 Hz, 200 kHz

Voltage Gain- 26 dB

Input Impedance- Balanced: 200kΩ,
Unbalanced 100kΩ

Common Mode Rejection (Balanced only)- 60 Hz: 90 dB,
10 kHz: 70 dB

Inputs- 3-pin balanced XLR

Output Connectors- 2 sets of 6 mm / .250-inch wingscrews

Weight- Amplifier: 220 lbs. (99.8 kg),
Shipping: 319 lbs. (144.7 kg)

Power Requirements- 100, 110-120, 220-240 VAC, 50-60 Hz
250W nominal, 5000W at maximum output

Amplifier Topology- Pure Class A to full-rated output