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Boulder 1151 Mono Power Amplifier
Boulder 1151 Mono Power Amplifier
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Details
Description
Boulder has the rare combination of technical and creative skills required to design this visually stunning and high-performance power amplifier.
Loudspeakers demand high-powered amplifiers to play at realistic levels. Even at low volumes, absolute control of the speaker is what makes you stop and listen.
Boulder has been providing this experience for over 40 years. Our history includes amplifiers that were used when capturing some of the greatest recordings ever made, so we know a thing or two about flawless audio reproduction. We also know that giving the 1151 Mono Amplifiers enough power to rein in the most challenging loudspeakers in a manageable package is the best way to bring these recordings to life in your home.
The heritage of Boulder’s 40 years of experience in amplifier design is evident in every aspect of the Boulder 1151 Mono Power Amplifier. Don’t take our word for it, we encourage you to hear it for yourself.
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350W peak power per channel into 8 ohms, 600W peak power into 4 ohms, 750W peak power into 2 ohms
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Space saving design is the same footprint (width and depth) as the 1110 Preamplifier and 1161 Stereo Amplifier and allows the use of a standard power cord
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Class-A Smart Current biasing circuit
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Newly developed protection circuitry safely and immediately shuts down the output section in case of shorted speaker cables or faults in the system and allows for greater peak power output
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Smaller carton packaging means easier transportation, unpacking, and installation
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Truly balanced input connections and output stage as with other 1100 Series products
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Output stage uses 40 output transistors and 12 supply capacitors per chassis to ensure stable, high-power output into any load while maintaining detail and clarity.
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The 1151 provides high amounts of current, making even the most difficult speaker perform to its fullest potential.
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Dual speaker connections via easy to connect, high-current speaker terminals to accommodate bi-wired loudspeakers
Specifications
Specifications
| Model | 1151 Mono Power Amplifier |
| Continuous Power; 8, 4, 2 Ohms | 250W |
| Peak Power, 8 Ohms | 350W |
| Peak Power, 4 Ohms | 600W |
| Peak Power, 2 Ohms | 750W |
| THD, 8 Ohms, 250W | 0.002%, 20 kHz: 0.01% |
| THD, 4 Ohms, 250W | 0.002%, 20 kHz: 0.01% |
| THD, 2 Ohms, 250W | 0.003%, 20 kHz: 0.02% |
| Signal to Noise | -108 dB, 10-80 kHz |
| Equivalent Input Noise (EIN), 20 kHz BW | 2.2 μV |
| Magnitude Response, 20 Hz to 20 kHz | +0.00, -0.04 dB |
| Magnitude Response, -3 dB at | 0.015 Hz, 150 kHz |
| Voltage Gain | 26 dB |
| Input Impedance | Balanced: 200k ohms, Unbalanced: 100k ohms |
| Common Mode Rejection (Balanced Only) | 60 Hz: 90 dB, 10 kHz: 65 dB |
| Input Connectors | 3-pin balanced XLR |
| Output Connectors | Two sets of 6 mm / .250-inch wingscrews |
| Weight | Amplifier: 54 lbs. (24.5 kg), Shipping: 64 lbs. (29.0 kg) |
| Power Requirements | 100, 110-120, 220-240 VAC, 50-60 Hz |
| Power Consumption | 10W standby, 60W idle, 800W at maximum output |
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Delivery & Returns
Delivery & Returns
We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).
For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.
Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.
Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.
