![]() This battery of tests will usually reveal if the amplifier has any issues that need further attention.īefore the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. 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. If the device under test has both balanced and single ended inputs they are both tested at this time. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. We continue increasing the signal level until the amplifier reaches clipping. 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 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. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. If 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. On vintage units we often spot check select capacitors for value and ESR. ![]() We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. The SkyFi Testing Process for Solid State Amplifiers: Weight 48 lb.Ĭlick here for a PDF copy of the Original MC7106 Sales BrochureĬlick here for a PDF copy of the MC7106 Owner's ManualĬlick here to view all McIntosh available for purchase on our website Power LED's indicate when each channel pair is active.īACK PANEL: Output terminals. (100w into 4 ohms mono with 2 channels bridged) Response 20-20kHz (+0 -0.25dB). This MC7106 will ship in an authentic McIntosh double box for safe transport.Ĭlick below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.Īscent Series Hero Analog Interconnects (PAIR) - RCA Ultraplate or WBT ConnectorsĪscent Series Hero Analog Interconnects (PAIR) - BALANCED XLR ConnectorsĮLECTRICAL: Eight channels. Light cosmetic blemishes including a black vertical mark in the channel four meter.Some of the red binding posts have cracks in the plastic from age that do not affect functionality.It comes in its original McIntosh box and includes an original copy of the owner's manual and a power cord. It has been fully tested in our lab to manufacturer specifications. This particular sample is in super clean condition without any noticiable scratches or blemishes. This unit, like almost all other McIntosh units, uses a front glass face plate which provides an attractive and very durable finish. The 6 x LED VU meters, not activated in the pictures, are simply gorgeous and very useful. There is also an adjustable display brightness control as shown on the back panel photo in this listing. 2 x 100 *AND* 2 x 300 for 4 channels total).4 x 100W and 1 x 300W for 3 channels total.You can configure this beast in the following configurations: *Note that a current McIntosh home theater amp will set you back over $7k ![]() Super flexible and powerful Lucasfilm THX rated theater amplifier from McIntosh.Ħ x 100 Watt amplifier channels in a single chassis! ![]()
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