{"product_id":"mcintosh-mc7108-8-channel-configurable-power-amplifier","title":"McIntosh MC7108 8-Channel Configurable Power Amplifier","description":"\u003cp\u003e\u003cstrong\u003eGeneral:\u003c\/strong\u003e\u003cbr\u003eThe McIntosh MC7108 is an unusually flexible multi-channel power amplifier that can be configured for 4, 5, 6, 7, or 8-channel operation, making it well suited for a wide range of stereo and home theater systems.\u003c\/p\u003e\n\u003cp\u003eIn its standard configuration, it provides up to eight 40-watt channels. Channel pairs can also be bridged to deliver 100 watts per channel, allowing you to trade channel count for higher output power depending on your system needs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMC7108 Output Configurations:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8-Channel Mode:\u003c\/strong\u003e\u003cbr\u003e8 x 40W\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7-Channel Mode:\u003c\/strong\u003e\u003cbr\u003e6 x 40W + 1 x 100W bridged channel\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6-Channel Mode:\u003c\/strong\u003e\u003cbr\u003e4 x 40W + 2 x 100W bridged channels\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5-Channel Mode:\u003c\/strong\u003e\u003cbr\u003e2 x 40W + 3 x 100W bridged channels\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4-Channel Mode:\u003c\/strong\u003e\u003cbr\u003e4 x 100W bridged channels\u003c\/p\u003e\n\u003cp\u003eEach 100W output is created by bridging a pair of amplifier channels.\u003c\/p\u003e\n\u003cp\u003eBridged operation is rated for 4-ohm loudspeaker loads.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis example  is in excellent cosmetic condition and was fully tested in our lab, where it performed properly across all channels.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eService Notes:\u003cbr\u003e\u003c\/strong\u003e• Channel 1 volume trimmer replaced\u003cbr\u003e• All lamps replaced\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCosmetic Notes:\u003c\/strong\u003e\u003cbr\u003e• Light marks on the end caps and metal trim surrounding the glass\u003cbr\u003e\u003cbr\u003e\u003cb\u003eBrand Background:\u003c\/b\u003e\u003cbr\u003eMcIntosh Laboratory is an American manufacturer of handcrafted high-end audio equipment based in Binghamton, New York. The company was founded in 1949 by Frank McIntosh. The company designs and produces audio amplifiers, stereo tuners and other consumer electronics products.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eOwnership:\u003c\/b\u003e\u003cbr\u003eSingle Owner\u003cbr\u003e\u003cbr\u003e\u003cb\u003eConnections:\u003c\/b\u003e\u003cbr\u003eRCA input and output jacks, screw terminals for speakers, captive power cord. 12V triggers.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eGeneral Sound:\u003c\/b\u003e\u003cbr\u003eAccurate to the recording\u003cbr\u003e\u003cbr\u003e\u003cb\u003eCosmetic Condition:\u003c\/b\u003e\u003cbr\u003e7\/10 = Good. One or two minor scratches. Well Maintained.. See our detailed rating description \u003ca href=\"https:\/\/skyfiaudio.com\/pages\/our-rating-scale\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWorking Condition:\u003c\/b\u003e\u003cbr\u003eWorking perfectly and tested in our lab and listening room.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eIncluded:\u003c\/b\u003e\u003cbr\u003eJust the unit and power cord.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePacking:\u003c\/b\u003e\u003cbr\u003eOriginal Manufacturers Packing\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003cbr\u003ePOWER OUTPUT, EIGHT CHANNELS\u003cbr\u003e40 watts per channel, minimum sine wave continuous average power output per channel, all channels operating into 4 ohm loads.\u003cbr\u003e\u003cbr\u003eThe output RMS voltage is:\u003cbr\u003e12.6V across 4 ohms\u003cbr\u003e\u003cbr\u003ePOWER OUTPUT, TWO CHANNELS BRIDGED\u003cbr\u003e100 watts into a 4 ohm load, minimum sine wave continuous average power output.\u003cbr\u003e\u003cbr\u003eThe output RMS voltage is:\u003cbr\u003e20V across 4 ohms\u003cbr\u003e\u003cbr\u003eOUTPUT LOAD IMPEDANCE\u003cbr\u003e8 or 4 ohms, for all eight separate channels\u003cbr\u003e8 or 4 ohms, for all Bridged Pairs\u003cbr\u003e\u003cbr\u003eRATED POWER BAND\u003cbr\u003e20H2 to 20,000Hz\u003cbr\u003e\u003cbr\u003eTOTAL HARMONIC DISTORTION\u003cbr\u003e0.005% maximum harmonic distortion at any power level from 250mW to rated power per channel from 20Hz to 20,000Hz, all channels operating.\u003cbr\u003e\u003cbr\u003eIHF DYNAMIC HEADROOM\u003cbr\u003e1.8dB\u003cbr\u003e\u003cbr\u003eFREQUENCY RESPONSE\u003cbr\u003e+ 0, -0.25dB from 20Hz to 20,000Hz\u003cbr\u003e+ 0, -3.0dB from 10Hz to 100,000Hz\u003cbr\u003e\u003cbr\u003eINPUT SENSITIVITY\u003cbr\u003e1V, (2.5V with Level control at center detent)\u003cbr\u003e\u003cbr\u003eA WEIGHTED SIGNAL TO NOISE RATIO\u003cbr\u003e92dB (112dB below rated output)\u003cbr\u003e\u003cbr\u003eINTERMODULATION DISTORTION,SMPTE\u003cbr\u003e0.005% maximum if instantaneous peak power does not exceed twice the output power rating per channel, with all channels operating, for any combination of frequencies from 20Hz to 20,000Hz.\u003cbr\u003e\u003cbr\u003eWIDE BAND DAMPING FACTOR\u003cbr\u003e200 at 8 ohms\u003cbr\u003e100 at 4 ohms\u003cbr\u003e\u003cbr\u003eINPUT IMPEDANCE\u003cbr\u003e20,000 ohms\u003cbr\u003e\u003cbr\u003ePOWER GUARD\u003cbr\u003eClipping is prevented and THD does not exceed 2% with up to 14dB overdrive at 1000Hz.\u003cbr\u003e\u003cbr\u003ePOWER REQUIREMENTS\u003cbr\u003e120V, 50\/60Hz, 8A UL\/CSA\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDimensions:\u003c\/b\u003e\u003cbr\u003eFront panel: 17-1\/2 inches (44.5cm) W, 7-1\/16 inches (17.9cm) H, 20 inches (50.8cm) D behind mounting panel, including clearance for connectors. Panel clearance required in front of mounting panel is 3\/4 inch (1.9cm).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e\u003cbr\u003e40 lbs.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eApproximate Age:\u003c\/b\u003e\u003cbr\u003e1998\u003cbr\u003e\u003cbr\u003e\u003cb\u003eLink to Manual:\u003c\/b\u003e\u003cbr\u003e\u003ca href=\"https:\/\/www.mcintoshlabs.com\/legacy-products\/amplifiers\/MC7108\" target=\"_blank\"\u003eClick Here\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eRecommended Cables:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-hero-interconnects-pair-rca-ultraplate-or-wbt-connectors-new\" target=\"_blank\"\u003eKimber Kable - RCA Interconnects\u003c\/a\u003e - Better\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-8tc-8-tc-ascent-speaker-cables-pair-new\" target=\"_blank\"\u003eKimber Kable - Speaker Cables\u003c\/a\u003e - Better\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-summit-series-monocle-xl-speaker-cables-pair-new\" target=\"_blank\"\u003eKimber Summit Series Monocle XL Speaker Cables (PAIR)\u003c\/a\u003e - Best\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-summit-series-bifocal-xl-bi-wire-speaker-cables-pair-new\" target=\"_blank\"\u003eKimber Summit Series BiFocal XL Bi-Wire Speaker Cables (PAIR)\u003c\/a\u003e - Best If Applicable \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-pk14-pk-14-ascent-power-cord-brand-new\" target=\"_blank\"\u003eKimber Kable - Power Cords\u003c\/a\u003e - Better\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/skyfiaudio.com\/products\/kimber-kable-ascent-series-pk10-pk-10-power-cord-brand-new\" target=\"_blank\"\u003eKimber Kable - Power Cords\u003c\/a\u003e - Best\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe SkyFi Testing Process for Solid State Amplifiers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR.\u003c\/p\u003e\n\u003cp\u003eIf the amplifier passes visual inspection, we move on to a controlled power on sequence using a Sencore safety analyzer to monitor current draw in real time. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. We connect the speaker outputs of the amplifier to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1KHz test signal at the amplifier’s input and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. If the device under test has both balanced and single ended inputs they are both tested at this time. We finish off the bench evaluation with a 1KHz square wave check and a 20Hz to 20KHz sine sweep to assess the amplifier’s frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention.\u003c\/p\u003e\n\u003cp\u003eBefore the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics.\u003c\/p\u003e\n\u003cp\u003eIf the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature.\u003c\/p\u003e","brand":"McIntosh","offers":[{"title":"Default Title","offer_id":44298679845118,"sku":"104637","price":3913.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0003\/3275\/9084\/files\/mcintosh-mc7108-8-channel-configurable-power-amplifier-141.jpg?v=1791236826","url":"https:\/\/skyfiaudio.com\/en-au\/products\/mcintosh-mc7108-8-channel-configurable-power-amplifier","provider":"SkyFi Audio","version":"1.0","type":"link"}