Built to the same standards and component quality as all other Mc amps from this era but in a compact chassis. We love the high quality and super capable speaker connectors on the back, which makes us wish they still made them like this. Includes single ended AND balanced XLR inputs. Built like a tank and fully tested. A Small Sampling of Performance Features Include: SENTRY MONITOR CIRCUIT• All power transistors have limits for the maximum amount of power they can handle. The MC7100 output transistors and power supply have been designed to allow very high current flow into properly matched load impedances. However, if a short circuit or very low load impedance is connected to the MC7100 outputs, destructive current levels could be reached if it was not controlled by the SENTRY MONITOR circuit. THERMAL CONTROL• All power transistors have limits to the maximum amount of heat they can safely tolerate. The MC7100 uses a highly efficient amplifying circuit which produces relatively little heat for the output power produced. The amplifier uses large area heat sinks to efficiently dissipate what heat it does generate. Natural convection air flow is sufficient for safe cool operation. POWER GUARD• A unique and patented feature of Mclntosh power amplifiers insures that each channel of the MC7100 will deliver full power, free of clipping distortion. A Mclntosh power amplifier with POWER GUARD will always deliver its maximum distortion free output. This power is always well above the rated power due to the Mclntosh philosophy of conservative design. MC7100 PERFORMANCE LIMITS:Performance limits are the maximum deviation from perfection permitted for a Mclntosh instrument. We promise you that when you purchase a new MC7100 from a Mclntosh Franchised Dealer, it will be capable of performance at or better than these limits. From hifi-review.com: "The McIntosh MC7100 represents a happy combination of truly state-of-the-art performance and design, handsome styling, and electrical and mechanical ruggedness from a company that has enjoyed an enviable reputation for customer support and product reliability for almost fifty years. It is also something of a bargain for a McIntosh product. Priced well below most so-called "high-end" amplifiers, it appears to provide most of their good qualities at a price not far above those of many well-known mass-market designs. That's great engineering."STEREO POWER OUTPUT150 watts into 4 ohm loads or 100 watts into 8 ohm loads minimum sine wave continuous average power output per channel, both channels operating.The output RMS voltage is:28.3V across 8 ohms 24.5V across 4 ohmsMONOPHONIC (BRIDGED)300 watts into an 8 ohm load minimum sine wave continuous average power output. The output RMS voltage is: 49 volts across 8 ohms.OUTPUT LOAD IMPEDANCE STEREO8 or 4 ohmsMONOPHONIC8 ohmsRATED POWER BAND20Hz to 20,000HzTOTAL HARMONIC DISTORTION0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power output.IHF DYNAMIC HEADROOM 8 ohms, 1.7dB4 ohms, 2.1dBFREQUENCY RESPONSE+ 0, -0.25dB from 20Hz to 20.000Hz + 0, -3.0dB from 10Hz to 100,000HzINPUT SENSITIVITY1.4 volts (2.5 volts at gain control center detent)A-WEIGHTED SIGNAL-TO-NOISE RATIO95dB (115dB below rated output)INTERMODULATION DISTORTION. SMPTE 0.005% maximum if instantaneous peak power output does not exceed twice the output power rating.RATINGSWIDE BAND DAMPING FACTOR8 ohms, 2004 ohms, 100INPUT IMPEDANCE 20,000 ohmsPOWER GUARDClipping is prevented and THD does not exceed 2% with up to 14dB overdrive at 1000Hz.POWER REQUIREMENTS120 volts, 50/60HZ, 3.0 amps UL/CSAMECHANICALSIZEFront panel: 17 1/2 inches (44.5cm) wide, by 3 5/8 inches (9.2cm) high.Chassis: 14 3/4 inches (37.5cm) wide, by 2 3/8 inches (6cm) high, by 14 1/2 inches (36.9cm) deep, (from back of front panel), in- cluding connectors. Panel clearance required in front of the mounting surface is 1 inch (2.54cm).FINISHGlass with special gold/teal nomenclature illumination. Chassis and chassis cover are black.WEIGHT24 pounds (11 Kg) net; 35 pounds (15.9Kg) in shipping carton. McIntosh MC7100 Owner's Manual McIntosh MC7100 Service Manual Our Testing Process for Amplifiers (Solid State) at SkyFi:We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage Kef speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice. Please click here for detailed specifics regarding our specialized packing process that separates us from the rest. Item Included Original Box No Manual Online Remote N/A Cables No Physical Condition 8 Working Condition 10
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