background image

14

Vacuum Tube Specifications

Power Output

150 watts into 2 ohm load

150 watts into 4 ohm load

150 watts into 8 ohm load

Rated Power Band

20Hz to 20,000Hz 

Dynamic Headroom

1.2dB

Wide Band Damping Factor

Greater than 18

Frequency Response

+0, -0.5dB from 20Hz to 20,000Hz

+0, -3.0dB from 10Hz to 70,000Hz

Total Harmonic Distortion

0.5% maximum harmonic distortion at any power 

level from 250 milliwatts to rated power, 20Hz to 

20,000Hz

Intermodulation Distortion

0.5% maximum, if the instantaneous peak power 

output does not exceed twice the rated power output 

for any combination of frequencies from 20Hz to 

20,000Hz

Signal To Noise Ratio (A Weighted)

112dB below rated output

Input Sensitivity (for rated output)

2.4 Volts Balanced

1.2 Volts Unbalanced

Voltage Gain

29dB, 8 ohms

26dB, 4 ohms

23dB, 2 ohms

Input Impedance

22,000 ohms Balanced

22,000 ohms Unbalanced

Solid State Specifications

Power Output

300 watts into 2 ohm load

300 watts into 4 ohm load

300 watts into 8 ohm load

Rated Power Band

20Hz to 20,000Hz

Dynamic Headroom

2.5dB

Wide Band Damping Factor

Greater than 40

Frequency Response

+0, -0.25dB from 20Hz to 20,000Hz

+0, -3.0dB from 10Hz to 100,000Hz

Total Harmonic Distortion

0.005% maximum harmonic distortion at any power 

level from 250 milliwatts to rated power, 20Hz to 

20,000Hz

Intermodulation Distortion

0.005% maximum, if the instantaneous peak power 

output does not exceed twice the rated power output 

for any combination of frequencies from 20Hz to 

20,000Hz

Signal To Noise Ratio (A Weighted)

118dB below rated output

Input Sensitivity (for rated output)

3.4 Volts Balanced

1.7 Volts Unbalanced

Voltage Gain

29dB, 8 ohms

26dB, 4 ohms

23dB, 2 ohms

Input Impedance

22,000 ohms Balanced

22,000 ohms Unbalanced

General Specifications

Power Control Input

5-12VDC

Power Control Output

12VDC, 25mA 

Power Requirements

100 Volts ~ 50/60Hz at 7.2 Amps

110 Volts ~ 50/60Hz at 6.0 Amps

120 Volts ~ 50/60Hz at 6.0 Amps

127 Volts ~ 50/60Hz at 6.0 Amps

220 Volts ~ 50/60Hz at 3.3 Amps

230 Volts ~ 50/60Hz at 3.3 Amps

240 Volts ~ 50/60Hz at 3.3 Amps

Standby, less than 0.5 watt

Refer to the rear panel of the MC451 for the 

correct voltage.

Overall Dimensions

Height is 11 13/16 inches (30cm) 

Width is 17 7/8 inches (45.4cm)

Depth is 21 1/2 inches (54.6cm) 

Weight

133 pounds (60.3kg) net

159 pounds (72.1kg) in shipping carton

Shipping Carton Dimensions

Height is 171/4 inches (43.8cm) 

Width is 28 inches (71.1cm)

Depth is 31 inches (78.7cm)

Содержание MC451

Страница 1: ...McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com MC451 Dual Mono Power Amplifier Owner s Manual...

Страница 2: ...al Specifications 14 Packing Instructions 15 Packaging Parts List 15 Thank You from All of Us at McIntosh You have invested in a precision instrument that will provide you with many years of enjoyment...

Страница 3: ...ir Warm Air Dimensions The following dimensions can assist in determining the best location for your MC451 17 8 45 4 cm 10 8 27 6 cm 11 16 30 cm 12 4 31 1 cm WATTS HOLD LIGHTS OFF METER REMOTE OFF ON...

Страница 4: ...porarily remove the tube cover To remove the tube cover 1 Use a 2 phillips head screw driver to remove the four screws two on each side that hold the tube cover 2 Pull the tube cover upward from the c...

Страница 5: ...nnection It is a safe bet to use the lower impedance output terminals for a speaker whose impedance falls between two choices Loudspeaker Cables When connecting loudspeakers to the MC451 it is very im...

Страница 6: ...too high a circuit in Power Guard SGS is activated which then dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels 5 POWER GUARD LED Indicates when P...

Страница 7: ...7 Front Panel Displays and Knobs...

Страница 8: ...ut sends a full range input signal to the solid state amplifier 5 Crossover Refer to page 12 Setting Up the Crossover for additional information 6 Power Control Power control allows the MC451 to send...

Страница 9: ...2 SOLID STATE 300W OUTPUTS CLASS 2 WIRING VACUUM TUBE 150W OUTPUTS CLASS 2 WIRING POWER CONTROL OUT IN AUTO OFF ENABLED DISABLED CROSSOVER MONO MODE VACUUM TUBE INPUT INPUT MODE BALANCED UNBALANCED BA...

Страница 10: ...R POINT Hz 1 2 3 3 6 0 VACUUM TUBE LEVEL dB HDMI ARC DA2 DIGITAL AUDIO MODULE USB AUDIO COAX 2 COAX 1 MCT OPTICAL 2 OPTICAL 1 DIGITAL AUDIO INPUTS SERIAL NUMBER POWER CONTROL MAIN TRIG 1 TRIG 3 PASSTH...

Страница 11: ...CONTROL OUT IN AUTO OFF ENABLED DISABLED CROSSOVER MONO MODE VACUUM TUBE INPUT INPUT MODE BALANCED UNBALANCED BAL UNBAL MONO SOLID STATE INPUT AMPLIFIER MODE MONO SEPARATE BAL UNBAL 300 250 400 550 1...

Страница 12: ...plifier CROSSOVER MONO MODE 300 250 400 550 180 130 800 1k 100 CROSSOVER POINT Hz 1 2 3 3 6 0 VACUUM TUBE LEVEL dB The VACUUM TUBE LEVEL knob allows gain adjustments to be made to the vacuum tube ampl...

Страница 13: ...er point and 0dB level difference Other crossover points will have similar curves 6 4 2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 20 30 50 100 200 300 500 1k 2k 3k 5k 10k 20k Frequency Hz Decibels Combined...

Страница 14: ...from 20Hz to 20 000Hz 0 3 0dB from 10Hz to 100 000Hz Total Harmonic Distortion 0 005 maximum harmonic distortion at any power level from 250 milliwatts to rated power 20Hz to 20 000Hz Intermodulation...

Страница 15: ...n the bottom pad Failure to do this will result in shipping damage Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping carton or any of...

Страница 16: ...cts is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www mcin...

Отзывы: