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8

Caution: The supplied AC Power Cord should not be

connected to the Rear Panel of the MC252
Amplifier until after the Loudspeaker Connections
have been made and the supplied protective
Terminal Connection Covers have been installed.
Failure to observe this could result in Electric
Shock.

1. For Remote Power Control, connect a power control

cable from the Control Center or Preamplifier Power
Control Out to the MC252 Power Control In.

2. Connect cables from the Unbalanced Output of a McIn-

tosh Preamplifier or Control Center to the MC252
Unbalanced Inputs.

Note: An optional hookup is to use balanced cables.

3. Prepare the Loudspeaker Hookup Cables that attach to

the MC252 Power Amplifier by choosing one of the
methods below:

Bare wire cable ends:
Carefully remove sufficient insulation from the cable
ends, refer to figures 1,
2 & 3. If the cable is
stranded, carefully twist
the strands together as
tightly as possible.

Note: If desired, the 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 section of
the cable end into the terminal side access hole, and
tighten the terminal cap until the cable is firmly
clamped into the terminal so the wires cannot slip out.
Refer to figures 4, 5 & 6.

Banana plug connection:
Insert the banana plug into the hole at the top of the
terminal. Tighten the top portion of the terminal post
and the set screw to secure the banana plug in place.

Note: The use

of
Banana
Plugs is
for use in
the
United
States
and Canada only.

4. Connect the Loudspeaker hookup cables to the output

terminals that match the impedance of the Loudspeak-
er, being careful to observe the correct polarities. Out-
put impedance connections of 2

S

 (ohm), 4

S

 (ohm) and

8

S

 (ohm) are provided. If the Loudspeaker’s imped-

ance is in-between the available connections, use the
nearest lower impedance connection.

WARNING: Loudspeaker terminals are hazardous live

and present a risk of electric shock. For
additional instruction on making
Loudspeaker Connections contact your
McIntosh Dealer or McIntosh Technical
Support.

5. Attach the supplied Terminal Connection Covers with

the four Mounting Screws (6-32 x 1/4 inch Phillips
Head) to the Rear Panel of the MC252 Amplifier. Refer
to figure 9.

Note: The illustration in figure 9 is for the purpose of

installing the Terminal Connection Covers, showing
the opening on the covers for the Loudspeaker
Cables to exit the MC252. It is not intended to show
which terminal connections to use.

6. Connect the MC252 power cord to an active AC outlet.

How to Connect in Stereo

Terminal Connection Covers

Cover Mounting
Screw Locations

Cable Openings

Figure 9

Cover Mounting
Screw Location

Содержание MC252

Страница 1: ...MC252 Owner s Manual McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 FAX 607 724 0549 Power Amplifier...

Страница 2: ...polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the prov...

Страница 3: ...x 607 723 3636 Table of Contents Important Information Caution The MC252 Amplifier weight is 94 5 pounds 42 87 kilograms It requires two or more persons to safely handle when moving the amplifier 1 Th...

Страница 4: ...mponents Positive N C Ground Balanced and Unbalanced Inputs Balanced connections guard against induced noise and al low long cable runs without compromising sound quality Patented Sentry Monitor with...

Страница 5: ...MC252 There is additional informa tion on the next page pertaining to installing the MC252 into cabinets 17 1 2 44 45cm 8 13 16 22 38cm Front View of the MC252 Rear View of the MC252 Side View of the...

Страница 6: ...fier If all the components are in stalled in a single cabinet a quiet running ventilation fan can be a definite asset in maintaining all the system components at the coolest possible operating tempera...

Страница 7: ...se holder refer to information on the top back panel of the MC252 to determine the cor rect fuse size and rating POWER CONTROL IN receives a turn On Off Trigger from a McIntosh component POWER CONTROL...

Страница 8: ...l so the wires cannot slip out Refer to figures 4 5 6 Banana plug connection Insert the banana plug into the hole at the top of the terminal Tighten the top portion of the terminal post and the set sc...

Страница 9: ...9 How to Connect in Stereo To AC Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 Top Rear View 4 ohm Loudspeaker...

Страница 10: ...or banana connector Spade lug or prepared wire connection Insert the spade lug connector or prepared section of the cable end into the terminal side access hole and tighten the terminal cap until the...

Страница 11: ...okup Connections Loudspeaker Impedance Loudspeaker Negative Connection Loudspeaker Positive Connection 4S Ohm Left Output 2S Positive Connection Right Output 2S Positive Connection 8S Ohm Left Output...

Страница 12: ...r to figures 1 2 3 If the cable wire is stranded carefully twist the strands together as tightly as possible Note If desired the twisted ends can be tinned with solder to keep the strands together or...

Страница 13: ...Outlet 4 ohm Loudspeaker McIntosh C45 Audio Control Center MC252 Top Rear View Jumper Wires additional instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical...

Страница 14: ...er POWER GUARD LED lights when the amplifier Right Channel POWER GUARD circuit activates POWER Switch Turns AC power On Off or On Remote Remote On Indicator lights when the amplifier is in the Remote...

Страница 15: ...e of a 2000Hz tone burst Hold The meter pointer is locked to the highest power peak in a sequence of peaks It is elec tronically held to this power level until a higher power peak passes through the a...

Страница 16: ...The MC252 can deliver the best possible perfor mance from any type of high quality loudspeaker system Creating an amplifier with this level of performance did not come easily Many months of design te...

Страница 17: ...000Hz with optimum imped ance points of two ohms four ohms and eight ohms The unequaled expertise of McIntosh in the design and manu facturing of autoformers is legendary in the high fidelity industr...

Страница 18: ...omise in sonic perfor mance with this circuit and it ensures safe op eration of the amplifier under even the most extreme operating condi tions The different types of protection circuits incorpo rated...

Страница 19: ...MC252 is equipped with a circuit that provides remote Power Control from Figure 20 Block Diagram of the Power Supply your McIntosh Preamplifier or Control Center When you turn on your preamplifier a...

Страница 20: ...20...

Страница 21: ...21 Notes...

Страница 22: ...on Distortion if instanta neous peak output per channel does not exceed twice the rated output for any combination of fre quencies from 20Hz to 20 000Hz with all channels operating is 0 005 Dynamic He...

Страница 23: ...he equipment must be packed exactly as shown below It is very important that the four plastic feet are at tached to the bottom of the equipment Three 10 x 2 1 2 inch screws and washers must be used to...

Страница 24: ...ntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without...

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