M c I n t o s h MC 2250 Stereo Power Amplifier250 250 Watt Per Channel prod. 1982 - 1988 1 out of only 499 units! This stereo amplifier is a serious piece of audio equipment. It is by far the most powerful amp that my home entertainment center has ever seen. The unit is about the size of an original XBOX, just alittle taller, but the MC 2250 weighs approx. 80 pounds! Ill include more detailed specs and information below, but in terms of my own experience with the unit; Sound: Exceptionally True, Full Resolution, Wide Soundstage with impressive seperation of vocals and bass, playback stays precise at low & high levels----no clipping or lagging or distortion whatsoever. Just smooth & powerful. Machine operates DEAD SILENT too! Physical Condition: Overall very good - great appearance. There are some hairline scratches and stubburn brushed-marks, and then theres maybe half a dozen more noticeable scratchesmarkings. Original Printed TextLettering is 96% Unscathed & Fully Legible, meaning less than 5% of the textlettering has been lost to time. Faceplate has one slightly bent corner, see photos, which is unfortunately not all that uncommon to see with heavy units like these. Interior is clean and well kept, wires kept tidy, surfaces shiny and connections secure. Metal frames and housings have very-very little to no rust at all. The photos should illustrate better than my words! ISSUE: The Red Light. Turn on the unit, and immediately the automatic system test sounds the alarm, (optional toggle off or on) indicates that there is something awry with The Left Channel (System Test code #3 blinks for a few seconds, it is faint, old bulb). Turn off the unit, wait a few moments and power it up again to find the same test code flashes, lighting up the red indicator for the left channel. HOWEVER, both channels are fully functioning and neither channel is operating differently than the other, if that makes sense. The left channel in this instance should be dead and or operate within a limited range, and the right channel should then sound significantly loudermore dynamic, simply in contrast to the left. But this is NOT the case. Fortunately, both left and right channels operate as they should, at low & high levels all the same. Unfortunately, there is a red light present alongside the normal green light. My guess is the left channel limit indicator has a faulty connection somewhere andor the corresponding IC chip (integrated circuit) component just needs to be replaced...or ignored! Technical Specifications:PERFORMANCE Mclntosh audio power ratings are in accordance with the Federal Trade Commission Regulation of November 4, 1974 concerning power output claims for amplifiers uséd in home entertainment products. POWER OUTPUT STEREO 250 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is: 15.8 volts RMS across 1 ohm 22.4 volts RMS across 2 ohms 31.6 volts RMS across 4 ohms 44.7 volts RMS across 8 ohms MONO 500 watts minimum sine wave continuous average power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is: 15.8 volts RMS across 0.5 ohm 22.4 volts RMS across 1 ohm 31.6 volts RMS across 2 ohms 44.7 volts RMS across 4 ohms 63.2 volts RMS across 8 ohms 89.4 volts RMS across 16 ohms OUTPUT LOAD IMPEDANCE STEREO 1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output. MONO-PARALLEL 0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by connecting together the appropriate terminals of both channels. MONO-BRIDGED 2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to common connections. RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION STEREO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 250 watts per channel from 20 Hz to 20,000 Hz, both channels operating. MONO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 500 watts from 20 Hz to 20,000 Hz. INTERMODULATION DISTORTION STEREO 0.02% maximum if instantaneous peak power out- put is 500 watts or less per channel with both channels operating for any combination of frequencies, 20 Hz to 20,000 Hz. MONO 0.02% maximum if instantaneous peak power out- put is 1000 watts or less for any combination of frequences, 20 Hz to 20,000 Hz. FREQUENCY RESPONSE (at one watt output) 20 Hz to 20,000 Hz +0 -0.25 dB. 10 Hz to 100,000 Hz + 0.25 - 1 dB. NOISE AND HUM 95 dB below rated output. DAMPING FACTOR Greater than 30 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. POWER REQUIREMENTS 120 volts 50/60 Hz 0.7 to 12 amps. SEMICONDUCTOR COMPLEMENT 76 silicon transistors 37 silicon rectifiers and diodes 9 integrated circuits SIZE Front panel measures 16 inches wide (40.7 cm) by 6-31/32 inches high (17.7 cm). Chassis measures 14-9/16 inches wide (37 cm) by 6-1/2 inches high (16.5 cm) by 14-1/2 inches deep (36.8 cm), including connectors. Knob clearance required is 1 inch (2.5 cm) in front of mounting panel FINISH Front panel is anodized gold. Chassis is chrome and black WEIGHT 80 pounds (36.3 kg) net 94 pounds (42.6 kg) in shipping carton Experience the exceptional sound quality of the McIntosh MC2250 Stereo Power Amplifier, a very rare piece of audio equipment that is 1 of only 499 ever made. This power amplifier delivers a powerful 250/250 watt output and features stereo L/R RCA audio inputs, 2 channels, and 2 inputs. Plus, it has a headphone jack and 4 outputs, making it the perfect addition to your home audio setup. With its sleek design and top-of-the-line features, the McIntosh MC2250 is the ideal choice for audiophiles who demand nothing but the best.

Service Schematics for McIntosh MC 2250   (circuit diagrams, settings... - what you need to repair a device) It is an ORIGINAL from McIntosh!!! Good used condition! Check out mine other items!By all means, take me into yours favorites! Have fun and success with the repair!!!   Service Schematics for McIntosh MC 2250   (circuit diagrams, settings... - what you need to repair a device) It is an ORIGINAL from McIntosh!!! Good used condition! Check out mine other items! By all means, take me into yours favorites! Have fun and success with the repair!!!  

M c I n t o s h MC 2250 Stereo Power Amplifier250 250 Watt Per Channel prod. 1982 - 1988 1 out of only 499 units! This stereo amplifier is a serious piece of audio equipment. It is by far the most powerful amp that my home entertainment center has ever seen. The unit is about the size of an original XBOX, just alittle taller, but the MC 2250 weighs approx. 80 pounds! Ill include more detailed specs and information below, but in terms of my own experience with the unit; Sound: Exceptionally True, Full Resolution, Wide Soundstage with impressive seperation of vocals and bass, playback stays precise at low & high levels----no clipping or lagging or distortion whatsoever. Just smooth & powerful. Machine operates DEAD SILENT too! Physical Condition: Overall very good - great appearance. There are some hairline scratches and stubburn brushed-marks, and then theres maybe half a dozen more noticeable scratchesmarkings. Original Printed TextLettering is 96% Unscathed & Fully Legible, meaning less than 5% of the textlettering has been lost to time. Faceplate has one slightly bent corner, see photos, which is unfortunately not all that uncommon to see with heavy units like these. Interior is clean and well kept, wires kept tidy, surfaces shiny and connections secure. Metal frames and housings have very-very little to no rust at all. The photos should illustrate better than my words! ISSUE: The Red Light. Turn on the unit, and immediately the automatic system test sounds the alarm, (optional toggle off or on) indicates that there is something awry with The Left Channel (System Test code #3 blinks for a few seconds, it is faint, old bulb). Turn off the unit, wait a few moments and power it up again to find the same test code flashes, lighting up the red indicator for the left channel. HOWEVER, both channels are fully functioning and neither channel is operating differently than the other, if that makes sense. The left channel in this instance should be dead and or operate within a limited range, and the right channel should then sound significantly loudermore dynamic, simply in contrast to the left. But this is NOT the case. Fortunately, both left and right channels operate as they should, at low & high levels all the same. Unfortunately, there is a red light present alongside the normal green light. My guess is the left channel limit indicator has a faulty connection somewhere andor the corresponding IC chip (integrated circuit) component just needs to be replaced...or ignored! Technical Specifications:PERFORMANCE Mclntosh audio power ratings are in accordance with the Federal Trade Commission Regulation of November 4, 1974 concerning power output claims for amplifiers uséd in home entertainment products. POWER OUTPUT STEREO 250 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is: 15.8 volts RMS across 1 ohm 22.4 volts RMS across 2 ohms 31.6 volts RMS across 4 ohms 44.7 volts RMS across 8 ohms MONO 500 watts minimum sine wave continuous average power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is: 15.8 volts RMS across 0.5 ohm 22.4 volts RMS across 1 ohm 31.6 volts RMS across 2 ohms 44.7 volts RMS across 4 ohms 63.2 volts RMS across 8 ohms 89.4 volts RMS across 16 ohms OUTPUT LOAD IMPEDANCE STEREO 1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output. MONO-PARALLEL 0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by connecting together the appropriate terminals of both channels. MONO-BRIDGED 2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to common connections. RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION STEREO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 250 watts per channel from 20 Hz to 20,000 Hz, both channels operating. MONO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 500 watts from 20 Hz to 20,000 Hz. INTERMODULATION DISTORTION STEREO 0.02% maximum if instantaneous peak power out- put is 500 watts or less per channel with both channels operating for any combination of frequencies, 20 Hz to 20,000 Hz. MONO 0.02% maximum if instantaneous peak power out- put is 1000 watts or less for any combination of frequences, 20 Hz to 20,000 Hz. FREQUENCY RESPONSE (at one watt output) 20 Hz to 20,000 Hz +0 -0.25 dB. 10 Hz to 100,000 Hz + 0.25 - 1 dB. NOISE AND HUM 95 dB below rated output. DAMPING FACTOR Greater than 30 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. POWER REQUIREMENTS 120 volts 50/60 Hz 0.7 to 12 amps. SEMICONDUCTOR COMPLEMENT 76 silicon transistors 37 silicon rectifiers and diodes 9 integrated circuits SIZE Front panel measures 16 inches wide (40.7 cm) by 6-31/32 inches high (17.7 cm). Chassis measures 14-9/16 inches wide (37 cm) by 6-1/2 inches high (16.5 cm) by 14-1/2 inches deep (36.8 cm), including connectors. Knob clearance required is 1 inch (2.5 cm) in front of mounting panel FINISH Front panel is anodized gold. Chassis is chrome and black WEIGHT 80 pounds (36.3 kg) net 94 pounds (42.6 kg) in shipping carton Experience the exceptional sound quality of the McIntosh MC2250 Stereo Power Amplifier, a very rare piece of audio equipment that is 1 of only 499 ever made. This power amplifier delivers a powerful 250/250 watt output and features stereo L/R RCA audio inputs, 2 channels, and 2 inputs. Plus, it has a headphone jack and 4 outputs, making it the perfect addition to your home audio setup. With its sleek design and top-of-the-line features, the McIntosh MC2250 is the ideal choice for audiophiles who demand nothing but the best.

M c I n t o s h MC 2250 Stereo Power Amplifier250 250 Watt Per Channel prod. 1982 - 1988 1 out of only 499 units! This stereo amplifier is a serious piece of audio equipment. It is by far the most powerful amp that my home entertainment center has ever seen. The unit is about the size of an original XBOX, just alittle taller, but the MC 2250 weighs approx. 80 pounds! Ill include more detailed specs and information below, but in terms of my own experience with the unit; Sound: Exceptionally True, Full Resolution, Wide Soundstage with impressive seperation of vocals and bass, playback stays precise at low & high levels----no clipping or lagging or distortion whatsoever. Just smooth & powerful. Machine operates DEAD SILENT too! Physical Condition: Overall very good - great appearance. There are some hairline scratches and stubburn brushed-marks, and then theres maybe half a dozen more noticeable scratchesmarkings. Original Printed TextLettering is 96% Unscathed & Fully Legible, meaning less than 5% of the textlettering has been lost to time. Faceplate has one slightly bent corner, see photos, which is unfortunately not all that uncommon to see with heavy units like these. Interior is clean and well kept, wires kept tidy, surfaces shiny and connections secure. Metal frames and housings have very-very little to no rust at all. The photos should illustrate better than my words! ISSUE: The Red Light. Turn on the unit, and immediately the automatic system test sounds the alarm, (optional toggle off or on) indicates that there is something awry with The Left Channel (System Test code #3 blinks for a few seconds, it is faint, old bulb). Turn off the unit, wait a few moments and power it up again to find the same test code flashes, lighting up the red indicator for the left channel. HOWEVER, both channels are fully functioning and neither channel is operating differently than the other, if that makes sense. The left channel in this instance should be dead and or operate within a limited range, and the right channel should then sound significantly loudermore dynamic, simply in contrast to the left. But this is NOT the case. Fortunately, both left and right channels operate as they should, at low & high levels all the same. Unfortunately, there is a red light present alongside the normal green light. My guess is the left channel limit indicator has a faulty connection somewhere andor the corresponding IC chip (integrated circuit) component just needs to be replaced...or ignored! Technical Specifications:PERFORMANCE Mclntosh audio power ratings are in accordance with the Federal Trade Commission Regulation of November 4, 1974 concerning power output claims for amplifiers uséd in home entertainment products. POWER OUTPUT STEREO 250 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is: 15.8 volts RMS across 1 ohm 22.4 volts RMS across 2 ohms 31.6 volts RMS across 4 ohms 44.7 volts RMS across 8 ohms MONO 500 watts minimum sine wave continuous average power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is: 15.8 volts RMS across 0.5 ohm 22.4 volts RMS across 1 ohm 31.6 volts RMS across 2 ohms 44.7 volts RMS across 4 ohms 63.2 volts RMS across 8 ohms 89.4 volts RMS across 16 ohms OUTPUT LOAD IMPEDANCE STEREO 1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output. MONO-PARALLEL 0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by connecting together the appropriate terminals of both channels. MONO-BRIDGED 2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to common connections. RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION STEREO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 250 watts per channel from 20 Hz to 20,000 Hz, both channels operating. MONO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 500 watts from 20 Hz to 20,000 Hz. INTERMODULATION DISTORTION STEREO 0.02% maximum if instantaneous peak power out- put is 500 watts or less per channel with both channels operating for any combination of frequencies, 20 Hz to 20,000 Hz. MONO 0.02% maximum if instantaneous peak power out- put is 1000 watts or less for any combination of frequences, 20 Hz to 20,000 Hz. FREQUENCY RESPONSE (at one watt output) 20 Hz to 20,000 Hz +0 -0.25 dB. 10 Hz to 100,000 Hz + 0.25 - 1 dB. NOISE AND HUM 95 dB below rated output. DAMPING FACTOR Greater than 30 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. POWER REQUIREMENTS 120 volts 50/60 Hz 0.7 to 12 amps. SEMICONDUCTOR COMPLEMENT 76 silicon transistors 37 silicon rectifiers and diodes 9 integrated circuits SIZE Front panel measures 16 inches wide (40.7 cm) by 6-31/32 inches high (17.7 cm). Chassis measures 14-9/16 inches wide (37 cm) by 6-1/2 inches high (16.5 cm) by 14-1/2 inches deep (36.8 cm), including connectors. Knob clearance required is 1 inch (2.5 cm) in front of mounting panel FINISH Front panel is anodized gold. Chassis is chrome and black WEIGHT 80 pounds (36.3 kg) net 94 pounds (42.6 kg) in shipping carton Experience the exceptional sound quality of the McIntosh MC2250 Stereo Power Amplifier, a very rare piece of audio equipment that is 1 of only 499 ever made. This power amplifier delivers a powerful 250/250 watt output and features stereo L/R RCA audio inputs, 2 channels, and 2 inputs. Plus, it has a headphone jack and 4 outputs, making it the perfect addition to your home audio setup. With its sleek design and top-of-the-line features, the McIntosh MC2250 is the ideal choice for audiophiles who demand nothing but the best.

M c I n t o s h MC 2250 Stereo Power Amplifier250 250 Watt Per Channel prod. 1982 - 1988 1 out of only 499 units! This stereo amplifier is a serious piece of audio equipment. It is by far the most powerful amp that my home entertainment center has ever seen. The unit is about the size of an original XBOX, just alittle taller, but the MC 2250 weighs approx. 80 pounds! Ill include more detailed specs and information below, but in terms of my own experience with the unit; Sound: Exceptionally True, Full Resolution, Wide Soundstage with impressive seperation of vocals and bass, playback stays precise at low & high levels----no clipping or lagging or distortion whatsoever. Just smooth & powerful. Machine operates DEAD SILENT too! Physical Condition: Overall very good - great appearance. There are some hairline scratches and stubburn brushed-marks, and then theres maybe half a dozen more noticeable scratchesmarkings. Original Printed TextLettering is 96% Unscathed & Fully Legible, meaning less than 5% of the textlettering has been lost to time. Faceplate has one slightly bent corner, see photos, which is unfortunately not all that uncommon to see with heavy units like these. Interior is clean and well kept, wires kept tidy, surfaces shiny and connections secure. Metal frames and housings have very-very little to no rust at all. The photos should illustrate better than my words! ISSUE: The Red Light. Turn on the unit, and immediately the automatic system test sounds the alarm, (optional toggle off or on) indicates that there is something awry with The Left Channel (System Test code #3 blinks for a few seconds, it is faint, old bulb). Turn off the unit, wait a few moments and power it up again to find the same test code flashes, lighting up the red indicator for the left channel. HOWEVER, both channels are fully functioning and neither channel is operating differently than the other, if that makes sense. The left channel in this instance should be dead and or operate within a limited range, and the right channel should then sound significantly loudermore dynamic, simply in contrast to the left. But this is NOT the case. Fortunately, both left and right channels operate as they should, at low & high levels all the same. Unfortunately, there is a red light present alongside the normal green light. My guess is the left channel limit indicator has a faulty connection somewhere andor the corresponding IC chip (integrated circuit) component just needs to be replaced...or ignored! Technical Specifications:PERFORMANCE Mclntosh audio power ratings are in accordance with the Federal Trade Commission Regulation of November 4, 1974 concerning power output claims for amplifiers uséd in home entertainment products. POWER OUTPUT STEREO 250 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is: 15.8 volts RMS across 1 ohm 22.4 volts RMS across 2 ohms 31.6 volts RMS across 4 ohms 44.7 volts RMS across 8 ohms MONO 500 watts minimum sine wave continuous average power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is: 15.8 volts RMS across 0.5 ohm 22.4 volts RMS across 1 ohm 31.6 volts RMS across 2 ohms 44.7 volts RMS across 4 ohms 63.2 volts RMS across 8 ohms 89.4 volts RMS across 16 ohms OUTPUT LOAD IMPEDANCE STEREO 1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output. MONO-PARALLEL 0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by connecting together the appropriate terminals of both channels. MONO-BRIDGED 2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to common connections. RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION STEREO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 250 watts per channel from 20 Hz to 20,000 Hz, both channels operating. MONO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 500 watts from 20 Hz to 20,000 Hz. INTERMODULATION DISTORTION STEREO 0.02% maximum if instantaneous peak power out- put is 500 watts or less per channel with both channels operating for any combination of frequencies, 20 Hz to 20,000 Hz. MONO 0.02% maximum if instantaneous peak power out- put is 1000 watts or less for any combination of frequences, 20 Hz to 20,000 Hz. FREQUENCY RESPONSE (at one watt output) 20 Hz to 20,000 Hz +0 -0.25 dB. 10 Hz to 100,000 Hz + 0.25 - 1 dB. NOISE AND HUM 95 dB below rated output. DAMPING FACTOR Greater than 30 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. POWER REQUIREMENTS 120 volts 50/60 Hz 0.7 to 12 amps. SEMICONDUCTOR COMPLEMENT 76 silicon transistors 37 silicon rectifiers and diodes 9 integrated circuits SIZE Front panel measures 16 inches wide (40.7 cm) by 6-31/32 inches high (17.7 cm). Chassis measures 14-9/16 inches wide (37 cm) by 6-1/2 inches high (16.5 cm) by 14-1/2 inches deep (36.8 cm), including connectors. Knob clearance required is 1 inch (2.5 cm) in front of mounting panel FINISH Front panel is anodized gold. Chassis is chrome and black WEIGHT 80 pounds (36.3 kg) net 94 pounds (42.6 kg) in shipping carton Experience the exceptional sound quality of the McIntosh MC2250 Stereo Power Amplifier, a very rare piece of audio equipment that is 1 of only 499 ever made. This power amplifier delivers a powerful 250/250 watt output and features stereo L/R RCA audio inputs, 2 channels, and 2 inputs. Plus, it has a headphone jack and 4 outputs, making it the perfect addition to your home audio setup. With its sleek design and top-of-the-line features, the McIntosh MC2250 is the ideal choice for audiophiles who demand nothing but the best.

M c I n t o s h MC 2250 Stereo Power Amplifier250 250 Watt Per Channel prod. 1982 - 1988 1 out of only 499 units! This stereo amplifier is a serious piece of audio equipment. It is by far the most powerful amp that my home entertainment center has ever seen. The unit is about the size of an original XBOX, just alittle taller, but the MC 2250 weighs approx. 80 pounds! Ill include more detailed specs and information below, but in terms of my own experience with the unit; Sound: Exceptionally True, Full Resolution, Wide Soundstage with impressive seperation of vocals and bass, playback stays precise at low & high levels----no clipping or lagging or distortion whatsoever. Just smooth & powerful. Machine operates DEAD SILENT too! Physical Condition: Overall very good - great appearance. There are some hairline scratches and stubburn brushed-marks, and then theres maybe half a dozen more noticeable scratchesmarkings. Original Printed TextLettering is 96% Unscathed & Fully Legible, meaning less than 5% of the textlettering has been lost to time. Faceplate has one slightly bent corner, see photos, which is unfortunately not all that uncommon to see with heavy units like these. Interior is clean and well kept, wires kept tidy, surfaces shiny and connections secure. Metal frames and housings have very-very little to no rust at all. The photos should illustrate better than my words! ISSUE: The Red Light. Turn on the unit, and immediately the automatic system test sounds the alarm, (optional toggle off or on) indicates that there is something awry with The Left Channel (System Test code #3 blinks for a few seconds, it is faint, old bulb). Turn off the unit, wait a few moments and power it up again to find the same test code flashes, lighting up the red indicator for the left channel. HOWEVER, both channels are fully functioning and neither channel is operating differently than the other, if that makes sense. The left channel in this instance should be dead and or operate within a limited range, and the right channel should then sound significantly loudermore dynamic, simply in contrast to the left. But this is NOT the case. Fortunately, both left and right channels operate as they should, at low & high levels all the same. Unfortunately, there is a red light present alongside the normal green light. My guess is the left channel limit indicator has a faulty connection somewhere andor the corresponding IC chip (integrated circuit) component just needs to be replaced...or ignored! Technical Specifications:PERFORMANCE Mclntosh audio power ratings are in accordance with the Federal Trade Commission Regulation of November 4, 1974 concerning power output claims for amplifiers uséd in home entertainment products. POWER OUTPUT STEREO 250 watts minimum sine wave continuous average power output, per channel, both channels operating into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load impedance, which is: 15.8 volts RMS across 1 ohm 22.4 volts RMS across 2 ohms 31.6 volts RMS across 4 ohms 44.7 volts RMS across 8 ohms MONO 500 watts minimum sine wave continuous average power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8 ohms, or 16 ohms load impedance, which is: 15.8 volts RMS across 0.5 ohm 22.4 volts RMS across 1 ohm 31.6 volts RMS across 2 ohms 44.7 volts RMS across 4 ohms 63.2 volts RMS across 8 ohms 89.4 volts RMS across 16 ohms OUTPUT LOAD IMPEDANCE STEREO 1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate terminals are provided for each output. MONO-PARALLEL 0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by connecting together the appropriate terminals of both channels. MONO-BRIDGED 2 ohms, 4 ohms, 8 ohms, or 16 ohms, balanced to common connections. RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION STEREO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 250 watts per channel from 20 Hz to 20,000 Hz, both channels operating. MONO 0.02% maximum harmonic distortion at any power level from 250 milliwatts to 500 watts from 20 Hz to 20,000 Hz. INTERMODULATION DISTORTION STEREO 0.02% maximum if instantaneous peak power out- put is 500 watts or less per channel with both channels operating for any combination of frequencies, 20 Hz to 20,000 Hz. MONO 0.02% maximum if instantaneous peak power out- put is 1000 watts or less for any combination of frequences, 20 Hz to 20,000 Hz. FREQUENCY RESPONSE (at one watt output) 20 Hz to 20,000 Hz +0 -0.25 dB. 10 Hz to 100,000 Hz + 0.25 - 1 dB. NOISE AND HUM 95 dB below rated output. DAMPING FACTOR Greater than 30 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. POWER REQUIREMENTS 120 volts 50/60 Hz 0.7 to 12 amps. SEMICONDUCTOR COMPLEMENT 76 silicon transistors 37 silicon rectifiers and diodes 9 integrated circuits SIZE Front panel measures 16 inches wide (40.7 cm) by 6-31/32 inches high (17.7 cm). Chassis measures 14-9/16 inches wide (37 cm) by 6-1/2 inches high (16.5 cm) by 14-1/2 inches deep (36.8 cm), including connectors. Knob clearance required is 1 inch (2.5 cm) in front of mounting panel FINISH Front panel is anodized gold. Chassis is chrome and black WEIGHT 80 pounds (36.3 kg) net 94 pounds (42.6 kg) in shipping carton Experience the exceptional sound quality of the McIntosh MC2250 Stereo Power Amplifier, a very rare piece of audio equipment that is 1 of only 499 ever made. This power amplifier delivers a powerful 250/250 watt output and features stereo L/R RCA audio inputs, 2 channels, and 2 inputs. Plus, it has a headphone jack and 4 outputs, making it the perfect addition to your home audio setup. With its sleek design and top-of-the-line features, the McIntosh MC2250 is the ideal choice for audiophiles who demand nothing but the best.