Boulder 1151
Image source — © Boulder
What is it?
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Model name
1151
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
200 000
Input impedance (single-ended) (Ω)
100 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
350
Output power (4Ω) (W)
600
Gain (dBu)
26
Frequency response low +/- 3dB (Hz)
0.015
Frequency response high +/- 3dB (Hz)
150 000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
0.002%, 20kHz 0.01% (8 Ohms)
Max power consumption (W)
N/A
Damping factor
N/A
Dimensions (mm)
N/A
Weight (kg)
24.5
Official link
The Boulder 2150 is a Class A single—channel power amplifier with up to 4,000 watts for any load (2-8 ohms). Inside there are 80 output transistors, three toroidal transformers and 48 capacitors for clear, distortion-free sound. The device is equipped with a fully balanced circuit and an XLR connector for input, two sets of terminals for output, supports Ethernet control and a 12V trigger.
The Boulder 3050 is the flagship Class A mono amplifier with 2,100 watts per channel (peak power of 6,000 watts at 2 ohms). Fully designed and hand-assembled in Colorado, with advanced circuitry, 120 output transistors and four filtered transformers for perfect sound output.