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4

Unpacking the MC2301

Caution

To prevent damage to the MC2301 

Tubes during shipping, there is a 

special foam insert surrounding the 

Tubes located on both sides of the 

Power Amplifier.

BOTH Foam Inserts must be 

removed from the MC2301 

before connecting the AC 

Power Supply Cord to the 

power amplifier.

Failure to do so has the po-

tential of a Fire Hazard, 

resulting in damage to the 

MC2301 and the surround-

ing environment. 

Follow the instructions below 

for removal of the packing 

foam before connecting the 

AC Power Supply Cord to 

the MC2301.

In order to remove the foam inserts sur-

rounding the tubes on the MC2301, it is nec-

essary to temporarily remove the two Tube 

Covers. After the foam inserts are removed, the 

Tube Covers are re-installed and should not be 

removed. The covers provide protection from 

Figure 2

Tube Cover

Chassis 

screws

the hazardous voltages inside the MC2301. 

The MC2301 has no user serviceable parts, 

including the tubes. If repairs are needed they 

must be performed by an authorized McIntosh 

Service Agency.

1. Orient the MC2301 so the Front Panel is fac-

ing you and remove the Warning Sheet. Refer to 

figure 1.

2. Using a Philips Head #2 screw driver, remove the 

two chassis screws securing the Tube Cover to 

the chassis on both sides of the MC2301. Refer to 

figure 2. Also remove the two screws securing the 

rear of the Tube Covers to the bracket. Refer to 

figure 7B on the next page.

3. Carefully lift up and remove the Tube Cover from 

each side of the MC2301. Refer to figure 3.

4. Place the Tube Covers, Bracket and the previously 

removed chassis screws in a safe location, as the 

Tube Covers will be reinstalled.

5. Carefully lift up and remove the Foam Insert from 

both sides the MC2301 exposing the Tubes. Refer 

to figures 4 and 5.

6. Carefully reinstall the previously removed Tube 

Covers using two chassis screws on each side and 

the Bracket with the two remaining screws at the 

rear of the MC2301. Make sure the metal tabs lo-

cated on the bottom of the Tube Cover are inserted 

into the chassis slots. Refer to figures 6, 7A, 7B 

and 8.

Note: Only use the chassis screws supplied with the 

MC2301. If you can not find the chassis screws, 

contact the McIntosh Parts Department for 

replacements.

7. Save the two Foam Inserts and Warning Sheet 

with the MC2301 Shipping Carton for possible 

further use.

Figure 1

Tube Covers

TO AVOID A FIRE HAZARD, 

THE FOAM INSERTS OVER 

THE VACUUM TUBES MUST 

BE REMOVED PRIOR TO 

CONNECTING THE A.C. 

MAINS POWER SUPPLY 

CORD AND OPERATING

THIS PRODUCT.

WARNING

REFER TO PAGE 3 IN THE 

MC2301 OWNER’S MANUAL

FOR INSTRUCTIONS.

Remove Foam 

Inserts located 

under the Tube 

Covers and the 

Warning Sheet

Summary of Contents for MC2301

Page 1: ...McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com MC2301 Tube Power Amplifier Owner s Manual...

Page 2: ...d for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularl...

Page 3: ...3 IMPORTANT INSTRUCTIONS FOR REMOVAL OF FOAM INSERTS OVER THE VACUUM TUBES PRIOR TO CONNECTING THE A C POWER SUPPLY CORD START ON THE NEXT PAGE...

Page 4: ...Tube Cover to the chassis on both sides of the MC2301 Refer to figure 2 Also remove the two screws securing the rear of the Tube Covers to the bracket Refer to figure 7B on the next page 3 Carefully l...

Page 5: ...on holes on the bottom of the amplifier and a means for the warm air to escape at the top Refer to figure 9 and the information on the next page for placement and installation of the MC2301 Ventilatio...

Page 6: ...art of your system If you or your Dealer wish additional help concerning a suspected problem you can receive technical assistance for all McIntosh products at McIntosh Laboratory Inc 2 Chambers Street...

Page 7: ...ry The MC2301 is fully balanced from input to output It consists of two matched Power Amplifiers operating in push pull using the famous McIntosh Patented Uni ty Coupled Circuit The circuit outputs ar...

Page 8: ...ion for your MC2301 Dimensions Front View of the MC2301 Rear View of the MC2301 Side View of the MC2301 17 3 4 45 09cm 11 27 94cm 12 5 16 31 27cm 20 50 86cm 21 54 61cm 3 16 0 48cm 10 1 2 26 70cm 15 3...

Page 9: ...per ating temperature A custom cabinet installation should provide the fol lowing minimum spacing dimensions for cool opera tion Allow at least 12 inches 30 48cm above the top 2 inches 5 08cm below th...

Page 10: ...10 Notes...

Page 11: ...en ter audio output BALANCED INput1 OUTput for an audio cable from a Pre amplifieroutput or to connect an audio cable on to the next Power Amplifier input 1 This Balanced connector may be used as an I...

Page 12: ...twisted ends can be tinned with solder to keep the strands together or attach spade lug and or banana connector Spade lug or prepared wire connection Insert the spade lug connector or prepared sec ti...

Page 13: ...13 How to Connect Loudspeaker Preamplifier Connect to AC Outlet...

Page 14: ...tion Insert the spade lug connector or prepared sec tion of the cable end into the terminal side ac cess hole and tighten the terminal cap until the cable is firmly clamped into the terminal so the wi...

Page 15: ...15 Loudspeaker How to Connect for Bi Amp Preamplifier Connect to AC Outlet Power Amplifier Two...

Page 16: ...er On and Sentry Monitor Tube Protection Activa tion Indicator Meter indicates the Power Output of the Amplifier POWER Switch Turns AC Power On Off or On Remote METER Switch selects the display modes...

Page 17: ...cIntosh A V Control Center or Preamplifier with Remote Meter Illumination Control the Meter Illumination will automatically be remotely controlled On Off with the METER Switch set to the WATTS or HOLD...

Page 18: ...udspeaker system Creating a tube amplifier with this level of perfor mance did not come easily Many months of design testing and measuring were required Extensive con trolled listening tests the ultim...

Page 19: ...re 13 The output signals of the two matched Patented Unity Coupled Circuit Power Amplifiers operate in a push pull balanced circuit and are coupled together in the unique McIntosh MC2301 Dual Core Out...

Page 20: ...in the event of an improper load mismatched impedance shorted loudspeaker cable or if a Power Output Tube should fail During normal operation there is absolutely no compromise in sonic perfor mance w...

Page 21: ...jack is delayed by a fraction of a second so that the turn on power surge of the next power ampli fier occurs at a later time This helps prevent power circuit overload that could trip circuit breaker...

Page 22: ...does not exceed twice the rated power output for any combination of frequencies from 20Hz to 20 000Hz Wide Band Damping Factor Greater than 15 Input Impedance 47 000 ohms Tube Compliment 2 12AT7 Volta...

Page 23: ...ached to the bottom of the equipment This will ensure the proper equipment location on the bottom foam pad Failure to do this will result in shipping damage To protect the tubes during shippment the t...

Page 24: ...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...

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