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
300k ohms Balanced; 100k ohms Single-ended.
OUTPUT POLARITY
Non-inverting. Balanced input pin 2+ (IEC-268).
OUTPUT TAPS
16 ohms, 8 ohms, 4 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
105-130VAC 60Hz (210-250VAC 50Hz) 400 watts at rated output, 700 watts maximum, 260 watts at “idle”, 1 watt off.
TUBES REQUIRED
2 matched pair KT150 (Power output V1-4); 2 6H30 (Gain stage V5 and V6).
DIMENSIONS
Width 19.0” (48.26 cm)
Height 10.25” (26 cm)
Depth 18.5” (46.4 cm)
With Handles and Connectors: 20.75” (52.7 cm)
WEIGHT
56lbs (25.5 kg) Net
73lbs (33.2 kg) Shipping

The price is for each mono amplifier

MER INFORMATION HÄR

Vacuum tube Monaural power amplifier

After two years in development, the new Reference 160M (REF160M) Monoblock Power Amplifier is built like no other, looks like no other, and sounds like no other amplifier that you have ever heard, but it is unmistakably Audio Research.

It features a refined audio topology with fewer and better components in the signal-path than in previous designs, switchable Ultralinear/Triode operation, proprietary auto-bias, output tube monitoring and protection, an advanced power meter, and much more. This array of features has never been offered before in an Audio Research amplifier.

The designers at Audio Research wanted to create a new style that would complement the look of the REF6 preamp while also featuring a transparent faceplate that allows a view of the glowing KT150 vacuum tubes.

While this window allows you to see the output tubes, it also incorporates an innovative dual-layer construction with distinctively etched markings that create an integrated power meter. The power meter’s output-level markings illuminate via hidden LEDs, and the illumination brightness is adjustable.

The REF160M includes a sculpted cover with an integrated fan to cool the heat generated by the four (4) KT150 output tubes and two (2) 6H30 driver tubes. Solid-state power regulation was chosen to provide increased efficiency, stability, and reliability.

The power supply stage uses a newly developed High Energy Capacity Transformer and a hefty bulk storage-capacity network to provide extremely high current on demand for transient peaks and intense dynamics, as well as for prodigious bass depth and authority.

It is understood that the best path is the shortest path. Audio Research engineers created a new audio circuit topology with the shortest signal path and the fewest components.

Those components are not only the best available, many are custom made for Audio Research. Incorporating these quality components is a special 4-layer circuit board that lowers the noise floor to unprecedented levels, and a design which was previously reserved for use in our preamplifiers.

The result is a new benchmark in musicality in every criterion of sound quality.

The REF160M also features a proprietary auto-bias circuit that works with various tubes types, including 6550, KT88, and KT120, in addition to the supplied KT150 and works constantly to maintain precise bias of the output tubes, while also adjusting for tube wear. There is no need to check or adjust bias ever again.

The new REF160M breaks new ground sonically, aesthetically and operationally, and will be available in Natural (Silver) or Black finishes.

About Audio Research
Audio Research is one of the oldest continually operating manufacturers in American audio. The company was founded in 1970 in Minneapolis with one goal in mind: to advance the state-of-the-art in music reproduction. Today, Audio Research remains a performance-oriented company by philosophy and design. New product introductions are driven only by genuine advances in technology and performance -- the HIGH DEFINITION that is the hallmark of the company's products.

The company has grown steadily over the last 40 years, with a network of top audio specialist retailers across North America and distributors throughout Europe, Asia and South America. The company occupies a 48,000 square-foot, technically-advanced production plant and administrative headquarters in Plymouth, Minnesota, where approximately 50 technical, assembly and support staff guide the product line from concept to finished goods.

The audio industry
Audio Research was instrumental in refocusing the audio industry on designing products for musical performance, and not merely for the sake of new technology or mass-market pricing. Audio Research was founded by William Z. Johnson, who began designing custom audio electronics in the early 1950's and who also operated a specialty audio retail store until the mid-1960's.

Johnson's efforts almost single-handedly revived vacuum-tube designs at a time when major industry manufacturers had abandoned this technology in favor of low-cost solid-state devices which were markedly inferior in terms of musical accuracy, a fact widely acknowledged today. Many industry observers consider Johnson one of the true originators of the entire concept of "high-end" audio as it exists today -- an area of technological expertise in which American companies remain the clear innovators and leaders on a global scale.

Musical enjoyment
Audio Research prides itself on manufacturing only those products which will provide genuine enjoyment for as long as the customer cares to own them. In company practice, this means that Audio Research technicians can still repair, refurbish and restore to original performance standards most products manufactured during the company's 40-year history. Indeed, 40-year-old Audio Research designs continue to provide exceptional musical enjoyment daily in music systems around the world.

Music lover
Audio Research products have demonstrated lasting residual value after purchase. More than a few models have acquired legendary "collector" status and continue to resell for as much or more than what they originally cost. The Audio Research customer does not have to fear instant, marked depreciation as is the case with most other audio components. Used Audio Research equipment is quickly absorbed on the open market because savvy enthusiasts know the company is interested in providing service and support for older models on an ongoing basis.

Much more than a mere carriage-trade brand name, the Audio Research marque has come to represent stellar performance and lasting value for music lovers and audio enthusiasts everywhere.