Instrukcja obsługi McIntosh MI1250

McIntosh odbiornik MI1250

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McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com
2
Thank You from all of us at McIntosh
You have invested in a precision instrument that
will provide you with many years of enjoyment.
Please take a few moments to familiarize yourself
with the features and instructions to get the
maximum performance from your equipment.
If you need further technical assistance, please
contact your dealer who may be more familiar with
your particular setup including other brands. You
can also contact McIntosh with additional questions
or in the unlikely event of needing service.
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Technical Assistance (607) 723-3512
Fax (607) 724-0549
Customer Service (607) 723-3515
Fax (607) 723-1917
Email support@mcintoshlabs.com
Website www.mcintoshlabs.com
Please Take A Moment
For future reference, you can write down your serial
number and purchase information here. We can
identify your purchase from this information if the
occasion should arise:
Serial Number: ______________________________
Purchase Date: ______________________________
Dealer Name: ______________________________
Copyright © 2021 by McIntosh Laboratory, Inc.
Table of Contents
Safety Instructions. .. .. .. .. .. .. .. .. .. .. Separate Sheet
Important Additional
Operation Information Guide
General Information . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 2
Connector .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 3
Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 3
Performance Features .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
3
Installation . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 4
Installation of Side Rack Mount Brackets . .. .. .. .. .. 4
Dimensions .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 5
Audio Input for Each Amplifier Channel 6
.. .. .. .. .. ..
Making All the Right Connections .. .. .. .. .. .. .. .. .. 7
Output Plug Connection.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 8
Connect From a Multichannel Zone Preamp . .. .. .. 8
How to Operate .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 9
Front and Rear Panel Displays. .. .. .. .. .. .. .. .. .. .. . 10
Specifications .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 11
Packing Instructions . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 11
General Information
1. For additional connection information, refer to the
owner’s manual(s) for any component(s) connected
to the MI1250.
2. The MI1250 mutes the speaker output for approxi-
mately two seconds when first turned on.
3. Included with the MI1250 and located in the
Owner’s Manual Packet are two Side Rack Mount
Brackets and screw fasteners. Refer to page 4 for
installing the Side Rack Mount Brackets.
4. For the best performance and safety it is impor-
tant to always attach a single Loudspeaker with
Important Safety Information is supplied in a separate document “Important Additional Operation Information Guide”
an 8 Ohm or 4 Ohm impedance to the Channel
1 - Channel 12 output terminals. Refer to “How to
Connect” pages 8 thru 10.
Note: The impedance of a Loudspeaker actu-
ally varies as the Loudspeaker reproduces
different frequencies. As a result, the nomi-
nal impedance rating of the Loudspeaker
(usually measured at a midrange frequency)
might not always agree with the impedance
of the Loudspeaker at low frequencies where
the greatest amount of power is required.
Contact the Loudspeaker Manufacturer for
additional information about the actual im-
pedance of the Loudspeaker before connect-
ing it to the McIntosh MI1250.
5. In the event the MI1250 Channels overheat, due
to improper ventilation or Loudspeaker Imped-
ance, the protection circuits will activate. The Front
Panel Channel LED will change color and the au-
dio will be muted. Refer to page 10. When the unit
has returned to a safe operating temperature, the
Channel(s) normal operation will resume.
6. If it becomes necessary to replace the Loudspeaker
Connection Plugs used on the MI1250 Rear Panel,
order part number 31065800 from the McIntosh
Parts Department.
7. For additional information on the MI1250 and
other McIntosh Products please visit the McIntosh
website at www.mcintoshlabs.com.
3
Connector Information
Power Control Connector
The MI1250 Power Control Input receives an On/Off
signal from +5 to +12 volts. The Power Control Output
will in turn provide a +12 volt Output Signal with a
total current up to 50mA. An additional connection
is for controlling the illumi-
nation of the MI1250 Meter
Power Output Indicators. The
3.5mm stereo mini phone
plug connects to a McIntosh
Preamplifier or A/V Control
Center Power Control Output.
Introduction
Now you can take advantage of traditional McIntosh
standards of excellence in the MI1250 Power Ampli-
fier. The Twelve Channel Power Amplifier produces
high power output per channel and will drive quality
Loudspeakers to a high level of performance. The
MI1250 reproduction is sonically transparent and ab-
solutely accurate. The McIntosh Sound is “The Sound
of the Music Itself.”
Performance Features
• Power Output
The MI1250 consists of Twelve Power Amplifier
Channels, each capable of 50 watts into 8 ohm or 90
watts into 4 ohm Loudspeakers with distortion less
than 0.05%.
• Loudspeaker Guard
The McIntosh Loudspeaker Guard Circuit prevents
the amplifier from being overdriven into clipping,
with its harsh, distorted sound that can damage your
valuable Loudspeakers.
• Versatile Operation
The MI1250 provides power amplification for up to
twelve channels in a multi-Zone Audio System.
• Unbalanced Inputs
There are twelve Unbalanced Analog Audio Inputs
for all twelve Power Amplifier Channels.
• Digital Audio Inputs
The Digital Inputs decode PCM Signals from exter-
nal sources. The Optical Inputs process Digital Sig-
nals from 32kHz to 192kHz with 24-Bit resolution.
• Sentry Monitor and Thermal Protection
McIntosh Sentry Monitor power output stage protec-
tion circuits ensure the MI1250 will have a long and
trouble free operating life. Built-in Thermal Protec-
tion circuits guard against overheating.
• Power Control
The McIntosh Power Control Circuit allows for
remote turn-on of the MI1250 Power Amplifier from
a McIntosh A/V Control Center or Preamplifier for a
single or dual Zone System.
• Robust Power Supply
A well regulated power supply ensures stable low
noise performance.
• LED Solid State Front Panel Illumination
The even Illumination of the Front Panel is accom-
plished by extra long life Light Emitting Diodes
(LEDs). The Metal and Glass Front Panel ensures
the pristine beauty of the MI1250 will be retained
for many years.
Power
Control
Meter
Illumination
Control Ground

Specyfikacje produktu

Marka: McIntosh
Kategoria: odbiornik
Model: MI1250

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