McIntosh MA6900 User manual

MA6900
Integrated
Amplifier
“ the power you want and the
flexibility you need all combined
in a single component”
Designed to deliver a continuous 200 Watts per channel, the MA6900 also
provides selection and control of 6 input sources, including one balanced
input and selectable moving-magnet phono stage. oudness compensation,
5-band equalizer, precision trimmed volume control and two sets of
switched outputs add to the list of features of this integrated amplifier.
Unique in the world of solid-state amplifiers, the MA6900 utilizes an
autoformer at the output of each channel. The autoformer provides an ideal
match for all types of speakers, regardless of their impedance, and allows
the MA6900 to always deliver all of its rated 200 Watts per channel. Whether
your speakers are 8, 4 or 2 Ohms, the exclusive McIntosh output autoformer
ensures that you will always get all of the power that you pay for.
The preamp section of the MA6900 utilizes encapsulated switching, which
reduces noise to the vanishing point. Instead of taking the music signal
“for a ride” through long wires and open connections that can oxidize and
become intermittent with age, all input switching in the MA6900 is done
using sealed electromagnetic switches located close to the input jacks.
Filled with an inert gas, these glass-encapsulated devices cannot oxidize
and never need cleaning.
Exclusive McIntosh Power Assurance System
Power uard®Clipping Protection
Sentry Monitor®Current Protection
Thermal Protection
DC Failure Protection
Turn-On Delay
Soft Start Inrush Protection
Illuminated Peak-Responding Wattmeters
Silent Electromagnetic Switching
Precision-Trimmed Volume Control
Exclusive McIntosh 5-Band Equalizer
Control Data Outputs
Remote Power Control

McIntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 139 3-2699
Tel [phone] • US Toll-Free (8 ) 538-6576 • Fax: [phone] • www.mcintoshlabs.com
For the Consumer’s Protection: In order to ensure the highest level of customer satisfaction, “new” McIntosh
products ma onl be purchased over-the-counter or delivered and installed b an Authorized McIntosh Dealer.
McIntosh products that are purchased over the Internet, b phone or mail order are presumed to be “used” and
do not qualif for an McIntosh Warrant . McIntosh does not warrant, in an wa , products that are purchased
from an one who is not an Authorized Dealer or products that have had their serial number altered or defaced.
MA6900
Integrated
Amplifier
5 BAND EQUALIZER
reat for touching up an
old recording, or taming the
acoustics of a problem room.
FLEXIBILITY
One set of balanced inputs, main
preamp-out/amp-in connection
and two additional switched
preamp outputs are included.
The ability to drive speaker
loads down to 2 Ohms make this
the perfect amplifier for driving
multiple pairs of speakers.
PHONO INPUT
The ultra-quiet McIntosh
phono stage for moving
magnet cartridges is built-in.
If desired, this input may
be changed to an “aux”
high level input in seconds.
ROW YOUR SYSTEM
With the addition of optional
McIntosh sensors, the amplifier
and other McIntosh components
can be operated from additional
rooms. Complete your system
with a McIntosh tuner and a
McIntosh CD changer.
2 x 200 watts (8/4/2 ohms)
Wide power bandwidth with ultra-low distortion
Exclusive Mc ntosh Power Assurance System
lluminated peak-responding meters
Exclusive Mc ntosh 5 band equalizer circuit
Silent electromagnetic switching
Precision-trimmed volume control
Loudness compensation
6 source selections including phono
Switching for 2 pairs of speakers
Control data output for source components
Remote power control
Remote operation of lights, screens and drapes
with optional Mc ntosh Home Controller
Electronically regulated power supply with
double-shielded transformer
Gold-plated input and output jacks
Fanless convection cooling
Modular construction with polished stainless steel chassis
Glass front panel with illuminated nomenclature
nfrared remote control
Connector for external R sensor or keypad controller
Headphone jack
FREQUENCY RESPONSE
20Hz to 20kHz, +0/-0.5dB
TOTAL HARMONIC DISTORTION
0.005% max. at any level from 250 milliwatts
to rated power output per channel from 20Hz
to 20kHz.
INTERMODULATION DISTORTION
SMPTE 0.005% maximum if instantaneous
peak power does not exceed 400W
per channel.
POWER OUTPUT (8/4/2)
200W minimum sine wave continuous
average power output per channel from 20Hz
to 20kHz with both channels operating.
A-WEI HTED SI NAL-TO-NOISE RATIO
Power amp: 110dB
below rated output
High level: 100dB
below rated output (90dB HF)
Phono: 90dB
below 10mV input (84dB HF)
INPUT IMPEDANCE
High level: 22K ohms
Phono: 47K ohms, 65pf
Main in: 20K ohms
OUTPUT LOAD IMPEDANCE
2, 4, or 8 ohms
INPUT SENSITIVITY
High Level: 250mV for 2.5V rated
output (50mV HF)
Phono: 2.5mV for 2.5V rated
output (0.5mV HF)
Power Amp n: 2.5V for rated output
DAMPIN FACTOR
Greater than 40
RATED POWER BAND
20Hz to 20kHz
DYNAMIC HEADROOM
2.4dB
MAXIMUM PREAMP VOLTA E OUTPUT
8V
MAXIMUM INPUT SI NAL
High level: 8V
Phono: 90mV
VOLTA E AIN
High level to tape: 0dB
High level to main: 20dB
EQUALIZER CONTROLS
Variable ±12dB at 30Hz, 150Hz, 500Hz,
1500Hz and 10kHz
POWER UARD®
Clipping is minimized and THD does not
exceed 2% with up to 14dB overdrive at 1kHz
POWER REQUIREMENTS
120V, 50/60Hz, 4.4 Amps
10.03.MA6900.20k.JCP 35002200
OVERALL DIMENSIONS (H x W x D including knobs and feet)
7-1/16" (17.9cm) x 17-1/2" (44.5cm) x 18.75" (47.6cm)
WEI HT
74.5 lbs (34kg) net • 92.5 lbs. (42kg) boxed