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McIntosh MC-7300 Audiophile 2-Ch Amplifier MC7300 AMP For Sale


McIntosh MC-7300 Audiophile 2-Ch Amplifier MC7300 AMP



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McIntosh MC-7300 Audiophile 2-Ch Amplifier MC7300 AMP:
$2,500


McIntosh MC-7300 Audiophile 2-Ch Amplifier MC7300 AMP A Remarkable Stereo Amp! MUST SEE!! !!!!!!!!!


    High Output Current Greater than 85 amperes peak output current to drive uneven speaker loads. Some esoteric speaker designs have input impedances that dip to 1 or 2 ohms at various frequencies. The MC7300 has the output current reserve to drive them.

  • Over 227 Joules of Energy Storage Huge main filter capacitors that guarantee an excellent signal to noise ratio and the energy storage necessary for the wide dynamic range that "Digital Audio" demands.

  • 50 Amp Gold Plated Output Terminals An exclusive McIntosh gold plated output terminal that will deliver full output power to speaker wires from 16GA to 4GA. 4 gauge wire is .204 inches in diameter, nearly 1/4 of an inch. ("Monster Cable" is 8GA, .128 inches in dial. You can connect directly to the wire. Special lugs or pins that can cause power loss are not required.

  • Illuminated Peak Responding Output Wattmeters The McIntosh MC7300 is the first high power amplifier to have Output Wattmeters that respond 95% full scale to a single cycle tone burst at 2kHz. Voltage and current output are electronically measured, multiplied and fed to a special circuit that accelerates the pointer movement in the upward direction. When the pointer reaches its peak it pauses only long enough for the human eye to perceive its position, then drops. It is almost 10 times faster than a professional VU meter.

  • Watts Hold The "Watts Hold" mode for the output meters, records and displays the highest power output peak of the source material being amplified.

  • Ultra Low Distortion Distortion so low that it defies measurement, even with the finest distortion analyzers At mid-frequencies, 8 ohm load, the distortion meter reads the residual distortion of the oscillator ( 0002%) with or without the MC7300 in the circuit. This means the amplifier distortion is lower than the analyzer is capable of measuring

  • Balanced and Unbalanced Inputs Modern technology has made it possible to build preamps and amplifiers with the high signal to noise ratio necessary to reproduce the sound quality present on compact discs However, the interconnecting cables can pick-up electrical interference from other equipment or appliances The balanced inputs on the MC7300 provide a minimum of 40dB more protection against such noise pick-up. Standard RCA inputs are also provided for normal connection.

  • Wide Power Bandwidth Full power output capability well above and below the frequencies that can be heard by humans

  • Power Guard This exclusive McIntosh circuit prevents harsh sounding clipping and protects your speakers from damage The MC7300 has a circuit that compares the wave shape of the output signal to the input signal If the disparity between the two signals, due to overdrive, exceeds an average of 0 3% (equivalent to 0 3% total harmonic distortion) an amber POWER GUARD indicator illuminates With any further increases in distortion the POWER GUARD circuit operates to limit the amplifier input dynamically so that the amplifier cannot be overdriven POWER GUARD eliminates amplifier output clipping POWER GUARD only operates when the amplifier is asked to deliver more power than that for which it was designed While the power output remains within these limits the POWER GUARD indicators do not illuminate

  • Sentry Monitor All power transistors have limits for the maximum amount of power they can handle The MC7300 output transistors and power supply have been designed to allow very high current flow into properly matched load impedances If, however, a short circuit or very low value of load impedance is applied to the output of the MC7300, destructive current levels could be reached if it was not controlled by the Sentry Monitor circuit. This circuit senses the dynamic operating time, voltage, and current of the amplifier output stage and controls the current flow confining it to nondestructive limits Sentry Monitor does not limit the power output available from the amplifier

  • Thermal Protection Thermal sensors that turn off the AC power if improper loading or ventilation causes the amplifier to over heat

  • Regulated Illumination The tremendous peak output power capability of the MC7300 has made the addition of a circuit that regulates the brilliance of the illumination necessary When there are high power output demands, the line voltage may sag, however this new circuit prevents the panel lights from dimming

  • Turn On Delay The MC7300 has a circuit that delays amplifier operation for about two seconds after turn on This prevents pops or thumps generated in other equipment from causing annoying noises or damaging your speakers

  • Output Autoformers The unequaled expertise of McIntosh in the design and manufacture of output transformers is legendary in the Hi Fi industry In the MC7300 they provide proper matching for 2, 4 and 8 ohms loads in stereo and 1,2,4,8 and 16 ohms in mono They protect your speakers from damage in the event of an output transistor failure, provide low distortion power transfer at frequencies well beyond human hearing and deliver peak output currents in excess of 85 amperes

  • Mode Switch The MC7300 will operate in three modes, Stereo, Mono Bridge, and Mono Parallel.

  • Input Level The input sensitivity of the MC7300 is 1.4 volts or 2.5V depending on the position of the INPUT sensitivity switch. For the best signal to noise ratio when using McIntosh source equipment, place the INPUT sensitivity switch in the 2.5V position and the front panel LEFT GAIN and RIGHT/MONO GAIN controls in the fully clockwise position. If more gain is desired, the 1.4V position may be used. All McIntosh preamplifiers have been designed to deliver 2.5 volts output with rated input. For source equipment other than McIntosh, set the switch in the position nearest to stated output rating of the source equipment.

  • Design Philosophy The secret to this performance will sound very simple, but it is more difficult to carry out than it may seem The principle used in the design of the MC7300 was to arrange every stage of voltage or current amplification to be as linear as possible This linear operation is accomplished by using several different techniques
    1
    Each transistor is selected to have nearly constant current gain (Beta) over the entire range of currents at which the transistor must operate
    2
    The load impedance presented to each amplification stage is made to be as uniform as possible for all signal levels
    3
    The input impedance of stages is increased and linearized where possible by using emitter degeneration
    4
    Resistors and capacitors in the signal path are carefully selected to have exceedingly low voltage coefficients (low change of resistance or reactance with applied voltage) Precision metal film resistors and low dielectric absorption film capacitors are used in all critical circuit locations
    5
    Output transistors have matched uniform current gain, high current gain-bandwidth product, low output capacitance, and large active-region safe operating area These characteristics and the automatic tracking bias system eliminates cross-over distortion

  • And Much More!


Actual MC7300 in video. Other equipment available in my other sales
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Power Output Stereo;
300 watts minimum sine wave continuous average power output, per channel, both channels operating into 2 ohms, 4 ohms, or 8 ohms load impedance, which is:
24.5 volts RMS across 2 ohms
34.6 volts RMS across 4 ohms
49.0 volts RMS across 8 ohms

Mono:
600 watts minimum sine wave continuous average power output into 4 ohms, 8 ohms, or 16 ohms load impedance, which is:
24.5 volts RMS across 1 ohm
34.6 volts RMS across 2 ohms
49.0 volts RMS across 4 ohms
69.3 volts RMS across 8 ohms
98.0 volts RMS across 16 ohms Output Load Impedance Stereo;
2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output.
Mono:
16, 8, 4, 2 or 1 ohms by connecting to proper output terminals. Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Stereo;
0.005% maximum harmonic distortion at any power level from 250 milliwatts to 300 watts per channel from 20 Hz to 20,000 Hz, both channels operating.
Mono;
0.005% maximum harmonic distortion at any power level from 250 milliwatts to 600 watts from 20Hz to 20,000Mz. Intermodulation Distortion 0.005% maximum if instantaneous peak power output does not exceed twice the output rating for any combination of frequencies from 20Hz to 20,000Hz. Frequency Response (at one watt output)
20Hz to 20,000Hz +0 -0.25dB l0Hz to 100,000Hz +0 -3dB Noise and Hum (A-Weighted)
105dB below rated output. IHF Dynamic Headroom 1.9dB Damping Factor Greater than 40 Input Impedance 20,000 ohms Unbalanced
40,000 ohms Balanced Input Sensitivity Switchable for either 1.4 or 2.5 volts Power Guard Clipping is prevented and THD does not exceed 2% with up to 14dB overdrive at 1kHz Power Requirements 120 volts, 50/60Hz, 0.6 to 13 amperes Dimensions 17 ½” Wide x 7 3/8” High x 16 ½” Deep Weight 77 lbs unpacked



Amplifier is in excellent condition sonically, mechanically, and cosmetically. It has been tested and all features and functions are working flawlessly. Both channels are strong and loud with no hum or distortion. All Lamps and meters are operating correctly. Cosmetically amp is very clean. Faceplate is flawless, no bubbling. This is a truly remarkable amp.

This is a sale so it will go to the highest buyer. I specialize in shipping large delicate items and I know what it will take to pack this right. All you have to pay towards shipping, insurance, packaging material, and expert packing is $55.75 to anywhere in the continental U.S. I will also ship this unit World Wide and will only charge the Actual Shipping cost.
Please note: the item pictured is guaranteed to be the actual item you will receive. None of my pictures are taken off other peoples pages or web sites, so offer with confidence - what you see is what you get! PayPal and any other approved payments gladly accepted! (please email for details) Never a handling fee, buyer pays actual shipping as stated above.

International buyers welcome.

Click here to check out my other sales for more great items!


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On Jun-10-11 at 20:10:57 PDT, seller added the following information:

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On Jun-10-11 at 22:14:56 PDT, seller added the following information:

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