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What is the stereo power output for the MCINTOSH MC300 POWER AMPLIFIER?
The minimum sinewave continuous average power output per channel from 20Hz to 20,000Hz with both channels operating is 300 watts into 8, 4, or 2 ohm loads.
The output RMS voltage is:
- 49.0 across 8 ohms
- 34.6 across 4 ohms
- 24.5 across 2 ohms
What is the mono-bridge power output for the MCINTOSH MC300 POWER AMPLIFIER?
The minimum sinewave continuous average power output from 20Hz to 20,000Hz is 600 watts into a 16, 8, or 4 ohm load. The output RMS voltage is:
- 98.0 across 16 ohms
- 69.3 across 8 ohms
- 49.0 across 4 ohms
What is the mono-parallel power output for the MCINTOSH MC300 POWER AMPLIFIER?
The minimum sinewave continuous average power output from 20Hz to 20,000Hz is 600 watts into a 4, 2 or 1 ohm load. The output RMS voltage is:
- 49.0 across 4 ohms
- 34.6 across 2 ohms
- 24.5 across 1 ohm
What are the stereo and mono output load impedances for the MCINTOSH MC300 POWER AMPLIFIER?
For STEREO, the output load impedance is 8, 4 or 2 ohms by connecting to the proper output terminals.
For MONO, the output load impedance is 16, 8, 4, 2 or 1 ohms by connecting to proper output terminals.
What is the total harmonic distortion for the MCINTOSH MC300 POWER AMPLIFIER?
For STEREO, it is 0.005% minimum harmonic distortion at any power level from 250 milliwatts to rated power per channel from 20Hz to 20,000Hz, both channels operating.
For MONO, it is 0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power from 20Hz to 20,000Hz.
What is the intermodulation distortion specification for the MCINTOSH MC300 POWER AMPLIFIER?
For STEREO, it is 0.005% maximum if instantaneous peak power output does not exceed twice the output rating per channel, with both channels operating, for any combination of frequencies from 20Hz to 20,000Hz.
For MONO, it is 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.
What is the frequency response for the MCINTOSH MC300 POWER AMPLIFIER at one watt output?
The frequency response is:
- +0, -0.25dB from 20Hz to 20kHz
- +0, -3.0dB from 10Hz to 100kHz
What is the hum and noise specification for the MCINTOSH MC300 POWER AMPLIFIER?
The hum and noise (A-weighted) is 105dB below rated output.
What is the IHF dynamic headroom for the MCINTOSH MC300 POWER AMPLIFIER?
The IHF dynamic headroom is 1.9dB.
What is the damping factor for the MCINTOSH MC300 POWER AMPLIFIER?
The damping factor is Greater than 40.
What are the input impedances for the MCINTOSH MC300 POWER AMPLIFIER?
The input impedances are:
- 20,000 ohms Unbalanced
- 40,000 ohms Balanced
What is the input sensitivity for the MCINTOSH MC300 POWER AMPLIFIER?
The input sensitivity is 1.4V with LEVEL Controls at maximum, and 2.5V sensitivity marked.
What are the power requirements for the MCINTOSH MC300 POWER AMPLIFIER?
The power requirements are:
- 120VAC, 50/60Hz, 3.3 Amperes UL/CSA
- 230VAC, 50/60Hz, 1.8 Amperes
What are the mechanical specifications (size and weight) for the MCINTOSH MC300 POWER AMPLIFIER?
The mechanical information is:
- Size: 17-1/2 inches wide (44.5cm) by 7-1/16 inches high (17.9cm). Depth is 19-3/4 inches (50.17cm) including connectors. Knob clearance required in front of the mounting panel is 1-1/8 inches (2.9cm).
- Finish: The front panel is a combination of glass and black anodized aluminum. The chassis is black.
- Weight: 79 pounds (35.8 kg) net, 97 pounds (44 kg) in shipping carton.
What are the front panel and trim parts lists for the MCINTOSH MC300 POWER AMPLIFIER?
The FRONT PANEL and TRIM PARTS LIST is:
| Part | Description |
|---|---|
| 018345 | End Caps |
| 018451 | Bottom Panel Extrusion |
| 018453 | Top Panel Extrusion |
| 048704 | Front Panel, Complete |
| 090247 | Control Knob Serial Nos. LN1001 thru LN1325 |
| 090246 | Control Knob Serial Nos. LN1326 and Above |
| 104017 | Knob Felt Washer, 3/4″ Dia |
What are the general service notes for the MCINTOSH MC300 POWER AMPLIFIER?
The notes for service on the MCINTOSH MC300 POWER AMPLIFIER are:
- The heavy lines on the schematics denote the primary signal path.
- Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions:
- AC input at 120 volts, 50/60Hz.
- All voltages are ± 10% with respect to ground. A high impedance (10 megohm) voltmeter must be used.
- Unless otherwise specified:
- Resistor values are in ohms.
- Capacitor values are in microfarads (uF).
- Inductor values are in microhenries (uH).
- The voltages enclosed in a box are signal voltages that are measured with a 1.4V, 1kHz signal connected to both channels at the input jacks.
- Front panel controls are set at:
- POWER ON
- METER WATTS
- On PC Board Drawings, Square Pad Indicates:
- Polarized Capacitors Positive
- Diode Cathode
- Others Pin 1
- WARNING: Parts marked with the symbol have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
What are the parts lists for the illumination sections of the MCINTOSH MC300 POWER AMPLIFIER?
Illumination Parts Lists:
LEFT FRONT PANEL ILLUMINATION PARTS LIST:
| Symbol | Part | Description |
|---|---|---|
| DS1 | 058120 | INC, 14V, 7373 |
LEFT FRONT PANEL ILLUMINATION PARTS LIST (For components marked with an asterisk on reverse side of board):
| Symbol | Part | Description |
|---|---|---|
| DS2 | 058120 | INC, 14V, 7373 |
RIGHT FRONT PANEL ILLUMINATION PARTS LIST:
| Symbol | Part | Description |
|---|---|---|
| DS3 | 058120 | INC, 14V, 7373 |
RIGHT FRONT PANEL ILLUMINATION PARTS LIST (For components marked with an asterisk on reverse side of board):
| Symbol | Part | Description |
|---|---|---|
| DS4 | 058120 | INC, 14V, 7373 |
LEFT METER ILLUMINATION PARTS LIST:
| Symbol | Part | Description |
|---|---|---|
| DS1-DS4 | 058120 | INC, 14V, 7373 |
RIGHT METER ILLUMINATION PARTS LIST (Components marked with an asterisk are on reverse side of board):
| Symbol | Part | Description |
|---|---|---|
| DS5-DS8 | 058120 | INC, 14V, 7373 |
POWER GUARD ILLUMINATION PARTS LIST:
| Symbol | Part | Description |
|---|---|---|
| DS9-DS10 | 058121 | LED, Amber Bar, MV15-3101 |
What are the parts lists for the INTERCONNECTION section of the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| C1 | 052005 | Capacitor Assy |
| D1 | 070139 | BRID, RECT, GBPC3504 |
| F1 | 089065 | FUSE, 10A, 250V, S.B. |
| F1 (EXPORT VERSION) | 089076 | FUSE, 5A, 250V, S.B. |
| S1,S4 | 146237 | Power Switch |
| S2,S3 | 153017 | Thermal Switch |
| RT1,RT2 | 052008 | Thermistor, 5 ohm |
| T1 | 048505 | Power |
| T2(L&R) | 047187 | Audio |
What are the parts lists for the INPUT portion of PCB 048488 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| IC1,IC2 | 133094 | Dual Op Amp, NE5532N |
| S1 | 148069 | MODE |
What are the parts lists for the CAPACITOR PCB 048489 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| C5,C6 | 066401 | ELECT, 30,000uF 100V |
| D1,D2 | 070031 | RECT, 400V, 1.5A |
| T1 | 159215 | Current |
What are the parts lists for the POSITIVE HEATSINK PCB 047188 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| Q15,Q16 | 132248 | NPN, 2SC3790D or E |
| Q18 | 132246 | NPN, MJ15020 |
| Q20,Q22,Q24, Q26,Q28 | 132212 | NPN, MJ15024 |
What are the parts lists for the NEGATIVE HEATSINK PCB 047189 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| Q17 | 132249 | PNP, 2SA1480D OR E |
| Q19 | 132247 | PNP, MJ15021 |
| Q21,Q23,Q25, Q27,Q29 | 132213 | PNP, MJ15025 |
What are the parts lists for the POWER DRIVER PCB 047360 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| D1-D10 | 070047 | SIG, 75V, 150mA, 1N4148 |
| IC1 | 133094 | Dual Op Amp, NE5532N |
| LDR1 | 144179 | LDR, VTL5C9 |
| K1 | 087050 | SPST, 5VDC, Reed, HE3321A0400 |
| Q1,Q2 | 132224 | PNP, MPS4126 |
| Q3 | 132253 | PNP, Dual, 2SA1237G |
| Q4 | 132250 | NPN, Dual, 2SC3066G |
| Q5 | 132251 | PNP, Dual, 2SA1239G |
| Q6 | 132252 | NPN, Dual, 2SC3064G |
| Q7 | 132250 | NPN, Dual, 2SC3066G |
| Q8 | 132251 | PNP, Dual, 2SA1239G |
| Q9 | 132136 | NPN, MPSA42 |
| Q10 | 132147 | PNP, MPSA92 |
| Q11 | 132249 | PNP, 2SA1480D or 2SA1480E |
| Q12 | 132248 | NPN, 2SC3790D or 2SC3790E |
| Q13 | 132171 | NPN, MPSA05 |
| Q14 | 132172 | PNP, MPSA55 |
What are the parts lists for the METER/REGULATOR PCB 047190 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| D1 | 070047 | SIG, 75V, 100mA, 1N4148 |
| D2 | 070099 | ZN, 12V, 5%, 500mW, 1N52428 |
| D3,D4 | 070131 | RECT, 400V, 1A, 1N4004 |
| D5 | 070085 | ZN, 6.2V, 5%, 500mW, 1N5234B |
| D6-D19 | 070047 | SIG, 75V, 150mA, 1N4148 |
| D20,D22 | 070136 | SIG, Low Leakage, FDH300 |
| D21 | 070047 | SIG, 75V, 150mA, 1N4148 |
| D23-D26 | 070047 | SIG, 75V, 150mA, 1N4148 |
| F1 | 089064 | Fuse, SB, 2A, 250V, 2AG |
| IC1 | 133156 | +12V Regulator, MC78M12CT |
| IC2 | 133155 | -12V Regulator, MC79M12CT |
| IC3,IC4 | 133028 | Dual Hi-speed Operational Amp, MC4558CP1 |
| IC5 | 133094 | Dual Operational Amp, NE5532N |
| M1,M2 | 124047 | METER |
| Q1 | 132242 | N, FET, BUZ71A |
| Q2 | 132224 | PNP, MPS4126 |
| Q3 | 132223 | NPN, MPS4124 |
| Q4,Q5 | 132224 | PNP, MPS4126 |
| Q6 | 132090 | NPN, DAR, MPSA25 |
| Q7,Q8 | 132223 | NPN, MPS4124 |
| Q9 | 132090 | NPN, DAR, MPSA25 |
| Q10-Q13 | 132254 | NPN, 2SC2362KG |
What are the parts lists for the RELAY PCB 048488 for the MCINTOSH MC300 POWER AMPLIFIER?
| Symbol | Part | Description |
|---|---|---|
| D1 | 070131 | RECT, 400V, 1A, 1N4004 |
| IC4 | 133093 | 5V Regulator, MC78L05ACP |
| IC5 | 133192 | CMOS, Quad 2-Input NAND Gate, MC74HC132 |
| K1 | 087052 | SPST, TV-8, 48VDC, JC1A-DC48V-TV |
| Q1 | 131020 | OPTO ISO, MOC3023 |
What are the parts required to repack the MCINTOSH MC300 POWER AMPLIFIER for shipment?
If it is necessary to repack the MCINTOSH MC300 POWER AMPLIFIER for shipment, the unit must be packed exactly as shown. The four plastic feet must be attached to the bottom of the unit so they will locate in the four holes of the bottom pad. Two #10 x 2-1/4″ screws and washers must be used to fasten the unit securely to the bottom pad and wood skid. Failure to do this will result in shipping damage.
The parts list for repacking is:
| Qty. | Part No. | Description |
|---|---|---|
| 1 | 033888 | Shipping carton only |
| 4 | 033887 | End cap (Foam pad) |
| 1 | 033697 | Inside carton only |
| 1 | 033725 | Top pad |
| 1 | 033698 | Bottom pad |
| 3 | 017218 | Plastic foot (spacer) |
| 1 | 033699 | Wood skid |
| 3 | 101169 | #10 x 2-1/4″ Wood screw |
| 3 | 104033 | #10 x 1-3/4″ Flat washer |
| 4 | 017218 | Plastic foot |
| 4 | 100159 | #10-32 x 3/4″ Machine screw |
| 4 | 104083 | #10 x 7/16″ Flat washer |
| 1 | 048572 | Shipping carton complete with all the above parts |
Use the original shipping carton and interior parts only if they are in good serviceable condition. If a shipping carton or any of the interior parts is needed, call or write the Customer Service Department of McIntosh Laboratory. Order parts from the accompanying list by part number.