McIntosh MC-2105 User Manual
THE MCINTOSH MC 2105 SOLID STATE STEREO POWER AMPLIFIER
Reading Time: 28 Minutes
Price $1.25
Your MC 2105 Stereo Power Amplifier
will give you many years of pleasant
and satisfactory performance. If you
have any questions, please contact:
CUSTOMER SERVICE
Mclntosh Laboratory Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3512
WARNING: TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE.
Take Advantage of 3 years
of FREE Factory Service . . .
Fill in the Application NOW.
CONTENTS
SERVICE CONTRACT 1
INSTALLATION 2,3
HOW TO CONNECT 4,5
HOW TO USE THE DYNAMIC
PEAK LOCKING METERS ... 6
FRONT PANEL INFORMATION ... 8
PERFORMANCE LIMITS
AND RATINGS 9
TYPICAL PERFORMANCE CHARTS .. 10
TECHNICAL DESCRIPTION 11
BLOCK DIAGRAM 12
THREE YEAR FACTORY SERVICE CONTRACT
An application for a FREE THREE YEAR FACTORY SERVICE CONTRACT is included with this manual.
The terms of the contract are:
1. Mclntosh will provide all parts, materials and
labor needed to return the measured performance of the instrument to the original performance limits free of any charge. The
SERVICE CONTRACT does not cover any shipping costs to and from the authorized service
agency or the factory.
2. Any Mclntosh authorized service agency will
repair all Mclntosh instruments at normal
service rates. To receive the free service under
the terms of the SERVICE CONTRACT, the
SERVICE CONTRACT CERTIFICATE must accompany the instrument when taken to the
service agency.
3. Always have service done by a Mclntosh
authorized service agency. If the instrument
is modified or damaged, as a result of unauthorized repair the SERVICE CONTRACT
will be cancelled. Damage by improper use
or mishandling is not covered by the SERVICE CONTRACT.
4. The SERVICE CONTRACT is issued to you as
the original purchaser. To protect you from
misrepresentation this contract cannot be
transferred to a second owner.
5. For your protection Mclntosh selects its
dealers carefully. Only one dealer in ten
qualifies for a Mclntosh franchise. To receive
the SERVICE CONTRACT your purchase must
be made from a Mclntosh franchised dealer.
6. Your completely filled in application for a
SERVICE CONTRACT must be postmarked
within 30 days of the date of purchase of
the instrument.
7. To receive the SERVICE CONTRACT all information on the application must be filled
in. The SERVICE CONTRACT will be issued
when the completely filled in application
is received at Mclntosh Laboratory Incorporated in Binghamton, New York.
Copyright © 1970 By Mclntosh Laboratory Inc.
1
Adequate ventilation extends the trouble-free
life of electronic instruments. It is generally found
that each 10° centigrade (18° F) rise in temperature reduces the life of electrical insulation by one
half. Adequate ventilation is an inexpensive and
effective means of preventing insulation breakdown
that results from unnecessarily high operating tem-
peratures. The direct benefit of adequate ventila-
tion is longer, trouble-free life.
Allow at least 15 inches deep x 17 inches wide
x 8 inches high for mounting the MC2105. Always
allow for air flow by either ventilation holes or
space next to the bottom of the amplifier and a
means for a warm air to escape at the top. With
adequate ventilation the amplifier can be mounted
in any position.
To prepare the MC 2105 for installation remove
the plastic protective covering. Turn it upside down
so that it rests on its top on the shipping pallet.
Remove the four plastic feet fastened to the bottom of the chassis.
Next, place the mounting brackets, the parts
bag and the mounting template at hand.
The PANLOC professional mounting design
eliminates the need for any shelf or bracket to
support the MC 2105. It is completely supported
by its own mounting brackets.
The design of the mounting template allows you
to position or locate the cutout from the front or
rear of the panel to which the instrument is to be
mounted. Position the plastic mounting template
over the area of the panel to be cut out for installation.
If the cutout is to be located from the front of
the panel, begin at 2. If the cutout is to be located
from the rear of the panel, begin here.
1. On the back of the cabinet panel, scribe a
vertical centerline through the exact center of
the area in which the cutout is to be made.
Place the template against the back of the
panel and match the template centerline with
the centerline on the cabinet panel.
Make sure that there is at least ¼ inch clearance between the bottom of the dashed line of
the cutout area on the template and any shelf
or brace below the proposed cutout.
Mark the two locating holes ("C" holes on
the mounting template).
Drill the two locating holes. Be certain the
drill is perpendicular to the panel.
Now position the template on the front of the
panel by aligning the "C" locating holes on the
template with the drill holes.
2. If the cutout is to be located from the front of
the panel:
With the template in place against the cabinet
panel, mark the "A" and "B" drill holes and
the four small holes that identify the corners
of the cutout. Join the corner marks with a pen-
cil. The edge of the template can be used as a
straight edge.
IMPORTANT: DRILL THE 6 HOLES BEFORE
MAKING THE CUTOUT.
Accurately drill the three holes on each side of
the cutout area with a 3/16 inch drill.
With the saw on the INSIDE OF THE PENCIL
LINES carefully cut out the rectangular opening.
Secure the mounting strips to the rear of the
cabinet panel using two screws from the hardware
package.
Insert the screws in the center holes of the cabi-
net panel ("B" holes on the template) and tighten.
The screw head should pull into the wood slightly.
(Use two % inch long screws for panels under ½
inch, or two 1¼ inch long screws for panels ½ inch
thick and larger.)
2
Attach the mounting brackets to the cabinet
panel using four screws.
Place the template over the mounting screws.
The mounting screws should be centered in the
"A" and "B" holes on the template. The sides of
the mounting brackets should match the vertical
dash lines on the template. If necessary, loosen the
screws and push the brackets into alignment and
retighten.
Insert the power cord through the opening. Carefully slide the MC 2105 into the opening so the rails
on the bottom of the equipment slide in the track
of the mounting brackets. Slide the instrument in
until it stops at the adjust position latches. Press
the latches in and continue to slide the instrument
in until the front panel is against the cabinet panel.
At the bottom front corners of the PANLOC instru-
ments are the PANLOC buttons. Depressing the
PANLOC buttons will lock the instrument firmly in
the installation. Depressing the PANLOC buttons
a second time (as with a ballpoint pen) will release
the instrument. You can then slide the instrument
forward to the inspection-adjustment position. Depressing the inspection-adjustment position latches
will allow the instrument to be slid completely out
of the installation.
3
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