Audio Research Reference 160M MkII Mono Amplifier

The Reference 160M MkII monoblock amplifier combines advanced tube technology with refined engineering for exceptional musical performance. Featuring four KT150 output tubes, two 6H30 drivers, switchable Ultralinear/Triode modes and proprietary auto-bias with tube monitoring, it delivers powerful dynamics, deep bass and outstanding clarity. A redesigned signal path with fewer, higher-grade components and a high-current power supply improves transparency and musicality. The signature GhostMeter™ display doubles as an adjustable power meter, blending style with functionality. Compatible with multiple tube types and requiring no manual bias adjustment, the REF160M MkII sets a new benchmark in performance, design and usability.

Technical Specifications:

Power Output: 140 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 140 watts, below 0.04% at 1 watt. (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical)

Power Bandwidth: (-3dB Points) 5Hz to 70kHz

Frequency Response: (-3dB points at 1 watt) 0.5Hz to 110kHz

Input Sensitivity: 2.4V RMS Balanced for rated output. (25.5 dB gain into 8 ohms)

Input Impedance: 200k ohms Balanced; 100k ohms Single-ended

Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)

Output Taps: 4, 8, 16 ohms

Output Regulation: Approximately 0.6dB 16 OHM LOAD TO OPEN CIRCUIT (Damping factor approximately 14)

Overall Negative Feedback: 14dB

Slew Rate: 13 volts/microsecond

Rise Time: 2.0 microseconds

Power Requirements per Monoblock: 105-130VAC 60Hz (210-250VAC 50Hz) 400 watts at rated output, 700 watts maximum, 260 watts at “idle”, 1 watt off.

Tubes Required per Monoblock: 2 matched pair KT150 (Power output V1-4); 4 6H30 (Gain stage V5 and V6)

Dimensions:

Width: 17.25” (43.8 cm)
Height: 10” (25.4 cm)
Depth: 18.5” (47 cm)
Handles Extended: 19.25” (48.9 cm)

Weight per Monoblock: 56lbs (25.5 kg) Net ; 73lbs (33.2 kg) Shipping