background image

1/4" DIA. (2 HOLES) 

Fig. 2. Top view of the panel cutout and mounting shelf. 

INSTALLATION PROCEDURE 

1. Mark for Position 

Mark the cabinet panel where the instrument is 

to be installed. The solid lines in Fig. 1 represent 
the outline of the rectangular cutout to be made 
and also represent the outside dimensions of the 
chassis. Make sure to clear internal shelves, parti-
tions, or any equipment. The broken line repre-

sents the outside dimension of the panel. 

2. Drill Holes 

Using a drill bit slightly larger than the tip of 

your saw blade, drill one hole at each of two dia-

gonally opposite corners. The holes should barely 
touch the inside edge of the outline. 

3. Saw Panel Cutout 

Place the blade of the saw in one of the holes. 

Sawing carefully on the inside of the lines, first 

make the two long cuts and then the two short 

cuts. After the rectangular opening has been cut 
out, use a file to square the corners and smooth 
any irregularities in the cut edges. 

4. Shelf Installation 

In the same way mark and saw the ventilation 

cutout shown in Fig. 2. Also drill two ¼

"

 holes for 

the mounting screws. Install the shelf to the 

cabinet panel. It must be able to support the total 

weight of the instrument. 

5. Install Instrument 

Guide the AC power cord through the panel 

opening to the back of the cabinet; then, slide the 

instrument into the opening until its front panel is 

flush with the cabinet panel. Secure the amplifier 
to the shelf with #10 wood screws of the proper 

length. 

½

" thick shelf—use 1" screws 

¾" thick shelf—use 1¼ " screws 

Do not use longer screws. They may penetrate 

electronic components inside the chassis and 

cause severe damage. The screw length must not 

exceed the shelf thickness by more than ½

". 

INSTALLATION IN A 19 INCH RACK 

The optional RMA7 RACK MOUNTING ADAPTERS 

install on each end of the amplifier front panel. On 

each side of the amplifier, three screws secure the 
front panel bracket to the chassis. See Fig. 3. 

Remove these three screws, place the RACK MOUN-

TING ADAPTER over the screw holes, and replace 

the screws. The entire amplifier weight is transmit-
ted through the RACK MOUNTING ADAPTERS to the 

rack. Additional support for the amplifier can be pro-

vided at the rear of the chassis as desired. 

Fig. 3. Rack Mounting Adapters installed. 

-3-

VENTILATION 

CUTOUT 

PANEL 

CUTOUT 

FRONT PANEL 

MTG.SURFACE 

Summary of Contents for MC 2250

Page 1: ...THE MclNTOSH MC 2 2 5 0 SOLID STATE STEREO POWER AMPLIFIER Reading Time 31 Minutes Price 2 00...

Page 2: ...the rear panel of the chassis Record that serial number here The model serial number and purchase date are im portant to you for any future service Record the pur chase date here Upon application Mcln...

Page 3: ...ng is not covered by the SERVICE CONTRACT 4 The SERVICE CONTRACT is issued to you as the original purchaser To pro tect you from misrepresentation this contract cannot be transferred to a se cond owne...

Page 4: ...nsformer and heat sinks but will not touch the edge of the front panel A pad from the shipping carton can be used for this purpose INSTALLATION IN A CUSTOM CABINET The trouble free life of an electron...

Page 5: ...l two holes for the mounting screws Install the shelf to the cabinet panel It must be able to support the total weight of the instrument 5 Install Instrument Guide the AC power cord through the panel...

Page 6: ...the loudspeakers have been designed If undersize wire is used resistance is added to the amplifier loudspeaker combination which adversely affects the perfor mance Added resistance causes depreciation...

Page 7: ...output im pedances of 2 4 8 and 16 ohms are accomodated Output connections are made by connecting to the output terminals as listed below Note that neither output terminal is at ground potential MONO...

Page 8: ...Stereophonic Connections 6...

Page 9: ...Mono Bridge Connections 7...

Page 10: ...Mono Parallel Connections 8...

Page 11: ...loudspeakers When the switch is OFF you can listen to headphones in private POWER The POWER switch turns the MC 2250 ON or OFF Each time the power is turned on the red SYSTEM TEST readout and green P...

Page 12: ...then five four three etc until it reaches 1 and then the speakers turn on A beep tone is heard each time a test is performed If a circuit should fail both red limit lights will come on and the sequenc...

Page 13: ...the Right MONO channel input jack accepts signal and the Left channel input jack is disconnected the 2 5 V position and the front panel LEFT and RIGHT MONO GAIN controls in the fully clockwise positi...

Page 14: ...Limits are the maximum deviation from perfection permitted for a Mclntosh instru ment We promise you that when you purchase a new MC 2250 from a Mclntosh franchised dealer it will be capable of or can...

Page 15: ...Performance Charts PERFORMANCE CHARTS ARE FOR ONE STEREO CHANNEL WITH BOTH CHANNELS OPERATING MONO OPERATION IS IDENTICAL EXCEPT POWER IS DOUBLED FOR THE SINGLE MONO OUTPUT 13...

Page 16: ...14...

Page 17: ...hich is then amplified by a following class A voltage amplifier Both the differential transitors and the voltage amplifier are supplied by active current sources The results are lower distortion and c...

Page 18: ...line power is applied to the MC 2250 the System Test circuit functions to verify operating potentials at 7 test locations within the amplifier Upon applying power a digital display lights with the nu...

Page 19: ......

Page 20: ...2 CHAMBERS ST BINGHAMTON N Y 13903 9990 607 723 3512 The continuous improvement of its products is the policy of Mclntosh Laboratory Incorporated who reserve the right to improve design without notice...

Reviews: