{"product_id":"audio-research-reference-160m-mkii-monoblock-poweramplifier-each","title":"Audio Research Reference 160M MkII Monoblock Poweramplifier (each)","description":"\u003ch1\u003eAudio Research Reference 160M MkII Monoblock Power Amplifier\u003c\/h1\u003e\n\u003ch3\u003e140 Watts of Reference-Series Tube Power With Switchable Ultralinear\/Triode Operation, Auto-Bias, and the Signature GhostMeter\u003c\/h3\u003e\n\u003cp\u003eThe Reference 160M MkII is a central pillar of Audio Research's Reference amplifier range, combining 140 W of continuous monoblock power with a refined signal path, switchable Ultralinear\/Triode operation, proprietary auto-bias, and comprehensive output-tube monitoring and protection.\u003c\/p\u003e\n\u003cp\u003eEach monoblock uses four KT150 output tubes, while a newly developed High Energy Capacity Transformer and substantial bulk storage-capacity network are designed to provide high current on demand. Audio Research's approach pairs this robust power supply with a deliberately short audio path built around a four-layer circuit board and selected high-grade and custom components.\u003c\/p\u003e\n\u003ch4\u003eUltralinear or Triode Operation\u003c\/h4\u003e\n\u003cp\u003eThe Reference 160M MkII allows the user to switch between Ultralinear and Triode operation, providing two distinct operating choices from the same amplifier. The feature is integrated into the amplifier's broader control and protection architecture rather than requiring manual reconfiguration of the output stage.\u003c\/p\u003e\n\u003ch4\u003eAutomatic Tube Bias\u003c\/h4\u003e\n\u003cp\u003eAudio Research's proprietary auto-bias circuit continuously maintains output-tube bias and compensates as the tubes wear, eliminating routine manual bias adjustment. In addition to the supplied KT150 output tubes, the circuit is designed to work with 6550, KT88, and KT120 tube types.\u003c\/p\u003e\n\u003ch4\u003eGhostMeter Display\u003c\/h4\u003e\n\u003cp\u003eThe distinctive GhostMeter provides a clear view of the output tubes while incorporating a power-output meter directly into the front-panel presentation. Etched markings form part of the integrated display, and its brightness is adjustable to suit the room.\u003c\/p\u003e\n\u003ch4\u003eHigh-Energy Power Supply and Short Signal Path\u003c\/h4\u003e\n\u003cp\u003eThe power supply incorporates Audio Research's High Energy Capacity Transformer and a large bulk storage-capacity network intended to provide the current reserves required for demanding transient peaks. A four-layer circuit board supports the amplifier's short signal path and its selection of high-grade and custom-made components.\u003c\/p\u003e\n\u003cp\u003eThe Reference 160M MkII is available in Natural (Silver) or Black finishes.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e140 W continuous monoblock output from 20 Hz–20 kHz\u003c\/li\u003e\n\u003cli\u003eSwitchable Ultralinear\/Triode operation\u003c\/li\u003e\n\u003cli\u003eProprietary automatic output-tube bias system\u003c\/li\u003e\n\u003cli\u003eOutput-tube monitoring and protection\u003c\/li\u003e\n\u003cli\u003eFour KT150 output tubes per monoblock\u003c\/li\u003e\n\u003cli\u003eCompatible with 6550, KT88, and KT120 output tubes through the auto-bias system\u003c\/li\u003e\n\u003cli\u003eHigh Energy Capacity Transformer with substantial bulk storage capacity\u003c\/li\u003e\n\u003cli\u003eFour-layer circuit board supporting a short signal path\u003c\/li\u003e\n\u003cli\u003eGhostMeter with integrated power-output display and adjustable brightness\u003c\/li\u003e\n\u003cli\u003eBalanced and single-ended inputs\u003c\/li\u003e\n\u003cli\u003e4-, 8-, and 16-ohm output taps\u003c\/li\u003e\n\u003cli\u003eAvailable in Natural (Silver) or Black finishes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003ePower Output:\u003c\/b\u003e 140 W continuous from 20 Hz–20 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTotal Harmonic Distortion (1 kHz):\u003c\/b\u003e Typically 1% at 140 W; below 0.04% at 1 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Bandwidth (-3 dB Points):\u003c\/b\u003e 5 Hz–70 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response (-3 dB Points at 1 W):\u003c\/b\u003e 0.5 Hz–110 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Sensitivity:\u003c\/b\u003e 2.4 V RMS balanced for rated output; 25.5 dB gain into 8 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 200k ohms balanced; 100k ohms single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Polarity:\u003c\/b\u003e Non-inverting; balanced input pin 2+ (IEC-268)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Taps:\u003c\/b\u003e 4, 8, 16 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Regulation:\u003c\/b\u003e Approximately 0.6 dB, 16-ohm load to open circuit; damping factor approximately 14\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOverall Negative Feedback:\u003c\/b\u003e 14 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSlew Rate:\u003c\/b\u003e 13 V\/microsecond\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRise Time:\u003c\/b\u003e 2 microseconds\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Requirements per Monoblock (US):\u003c\/b\u003e 105–130 VAC, 60 Hz; 400 W at rated output, 700 W maximum, 260 W at idle, 1 W off\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOutput Tubes per Monoblock:\u003c\/b\u003e 2 matched pairs KT150 (V1–V4)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (H × W × D):\u003c\/b\u003e 10\" x 17.25\" x 18.5\" (25.4 x 43.8 x 47 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDepth With Handles Extended:\u003c\/b\u003e 19.25\" (48.9 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eShipping Weight per Monoblock:\u003c\/b\u003e 73 lb. (33.2 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight per Monoblock:\u003c\/b\u003e 56 lb. (25.5 kg)\u003c\/p\u003e\n","brand":"Audio Research","offers":[{"title":"Black","offer_id":53876968390840,"sku":"ARC-REF160M-BLK","price":22500.0,"currency_code":"USD","in_stock":true},{"title":"Natural (Silver)","offer_id":53876968423608,"sku":"ARC-REF160M-NAT","price":22500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/Ref160frontcoverBLKfull.jpg?v=1786385337","url":"https:\/\/upscaleaudio.pro\/products\/audio-research-reference-160m-mkii-monoblock-poweramplifier-each","provider":"Upscale Audio","version":"1.0","type":"link"}