The new 1151 monoblock is the latest addition to Boulder Amplifiers’ range and expands the Colorado company’s exalted 1100 series high power amplifier selection.
The new 1151 mono amplifier is designed, CNC machined and fully assembled in Louisville, Colorado at Boulder Amplifiers’ own facility – that includes the 1151’s bespoke circuit boards. As per the company’s amplifier design principles, the 1151 features a wide bandwidth (-3dB from 0.015 Hz to 150 kHz Frequency Response), two-stage signal path architecture, with the amplifier being rated at 250 watts of continuous power into 8, 4, and 2 ohms. Boulder Amplifiers states the peak power to be 350 watts into 8 ohms with near-doubling-up to 600 watts into 4 ohms and providing 750 watts into 2 ohms. As per the other 1100 series electronics, the 1151 is a true balanced design from input to output.
The 1151 mono amplifier features a newly revised and redesigned automatic biasing circuit which “accurately stabilizes bias to eliminate the need for manual calibration”. Also new is an enhanced protection scheme which activates immediately after sensing a fault, shutting down the amplifier and protecting it and other connected components from damage.
The high-current, low output impedance design features a total of 40 output transistors and 12 smaller and faster power supply capacitors per monoblock, with the 1151 said to be capable of driving any load “while maintaining detail and clarity”. The heatsinking system is machined from a solid billet of aluminium for efficient heat dissipation. The chassis sits on specially-designed footers featuring constrained layer damping technology.
Being a true balanced design, signal connectivity is only available via XLR input coupled to a 200 kohms balanced input impedance (100 kohms unbalanced). Twin custom binding posts allow bi-wiring connectivity to speakers providing dual terminals.
The Boulder Amplifiers 1151 Mono Power Amplifier is priced at AU$41,750 each and will be available in Australia via importer Absolute Hi End.
Boulder Amplifiers 1151 Mono Power Amplifier
Price: AU$41,750 each
Australian Distributor: Absolute Hi End
+61 488 777 999
www.absolutehiend.com
