User manual MCINTOSH MC215X BROCHURE

[. . . ] McIntosh superior quality has been long recognized world wide. that permits adequate ventilation, then correctly matching the cool operating output circuit to the loudspeakers with a McIntosh designed and manufactured autotransformer. The McIntosh output circuit uses bipolar epitaxial output transistors in a cleverly inventive design that keeps the circuit components cool, extending the long trouble-free life of the components. The circuit has the ability to recognize the power demands of the program material and then to activate only as much of the output circuit as is needed to satisfy that demand. [. . . ] Anodizing is an electro-chemical process that leaves a color dyed and hardened surface that is impervious to attack from common household cleaning fluids, oils and acids from the skin and is highly wear resistant. This handsome combination of glass, anodized aluminum and epoxy requires very little maintenance to keep that, "Just new" appearance. The subtle yet sophisticated styling is designed to complement any decorative scheme and will remain in "good taste". The MC 2150 front panel is an attractive combination of textured anodized aluminum and baked enamel. The knobs are machined of solid aluminum then anodized for permanence. pleasure and enjoyment of listening. This form of distortion (clipped signal) also produces extra heat energy which will damage most speakers. McIntosh leadership in engineering has developed the Power Guard circuit which-(1) dynamically prevents power amplifiers from being overdriven into hard clipping-(2) assures that the amplifier will produce its maximum output without increased distortion-(3) protects your speaker from excessive heating. Power Guard is a patented McIntosh design (U. S. patent #4, 048, 573). THE MCINTOSH AUTOMATIC TEST SYSTEM The McIntosh Automatic Test System provides positive performance protection and extends the long trouble-free life of an amplifier. Each time the amplifier is turned on, the Automatic Test System electronically measures and verifies accurate performance at seven critical points in the amplifier's circuits. The Automatic Test System verification assures operational readiness before operation starts and limits any damage should there be component malfunction. Each time a test is verified an LED number indicator shows which test is being performed. This Automatic Test System protects your investment. INSTALLATION WITHTHEMC2155 The quality performance, quality appearance, qualify manufacture and quality protection described for the MC 2155 are repeated in the MC 2150. The "Pro-Panel" has an attractive baked enamel and gold anodized finish. Its versatility permits ease of custom installation, installation in the McIntosh furniture cabinet or can be easily converted to professional rack mounting with The deletion of the meters and and circuits are the only high performance models. THE McINTOSH POWER METERS The lack of accurate performance in ordinary meters has PROTECTION 1. When ordinary amplifiers are asked to exceed their design maximum, or have an accidental short circuit across the output or a severe impedance mismatch, the operating temperature of the output stages can rise very rapidly, leading to cataclysmic failure. McIntosh engineers developed the Sentry Monitory Circuit which monitors operating conditions of the output stages of the amplifier. If a McIntosh amplifier is asked to exceed its design parameters, the Sentry Monitor Circuit is activated which protects the output transistors and helps to prevent failure. The Sentry Monitor Circuit has been granted a U. S. A heat sensing switch attached to the super sized heat sinks controls the AC power to the amplifier. As long as temperatures are normal it does not function; but, should the temperature of the heat sinks rise above normal, the AC power is disconnected automatically until the temperature returns to normal when the AC power is restored. In ordinary solid state circuits failure in the output stage can cause damaging direct current components to flow to the loudspeakers. [. . . ] RATINGS DAMPING FACTOR INPUT IMPEDANCE 50, 000 ohms. INPUT SENSITIVITY Switchable: 0. 75 volt or 2. 5 volts-level control provided for higher input voltages. POWER GUARD Clipping is prevented and THD does not exceed 2% with up to 20 dB overdrive at 1 kHz. GENERAL INFORMATION POWER REQUIREMENTS 120 volts 50/60 Hz 0. 7 to 12 amps. [. . . ]