Mcintosh mr85br schematic

MR85
AM/FM Tuner

“rediscover the pleasures

of radio with

the

MR85 tuner”

The MR85 is meticulously engineered as a broadcast-grade monitor
that reveals the upper limits of AM/FM performance. Manual tuning
is accomplished through a sophisticated optical encoder that is
actuated by a “smooth-dialing” weighted flywheel. Other features
include permanent memory for all settings and selectable auto-mute
for local/distance tuning. An alpha-numeric fluorescent display
indicates band, station frequency, signal strength and station preset.

As an expansion option, an additional tuner module may be added by
a McIntosh dealer. This is perfect for multizone applications because
the MR85 becomes two great tuners that operate independently and
can be used simultaneously. All station presets for each tuner may be
labeled with a name containing as many as eight characters. A good
tuner is hard to find, even as a separate. A great tuner such as the
MR85 is truly rare, and will let you rediscover the pleasures of radio.

High-Performance AM/FM Broadcast Monitor
Expansion Options Adds Second

Internal Tuner for Zone B

Non-Volatile Memory for 9 FM and

9 AM Presets (per tuner)
Custom Naming for Each Preset
Auto-Memory of Preferred Settings

for Each Preset
Permanent Memory of All Settings
Auto-mute for Distance Tuning
Remote Power Control In/Out
Fixed and Variable Audio Outputs
McIntosh Spatial Sound Enhancement
High Sensitivity DMOS-FET RF Amplifier
Phase Locked Loop FM Multiplex Decoder
Gold-Plated Output Jacks

McIntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 13903-2699

Tel [phone] • US Toll-Free [phone] • Fax: [phone]• www.mcintoshlabs.com

For the Consumer’s Protection: In order to ensure the highest level of customer satisfaction, “new” McIntosh
products may only be purchased over-the-counter or delivered and installed by an Authorized McIntosh Dealer.
McIntosh products that are purchased over the Internet, by phone or mail order are presumed to be “used” and
do not qualify for any McIntosh Warranty. McIntosh does not warrant, in any way, products that are purchased
from anyone who is not an Authorized Dealer or products that have had their serial number altered or defaced.

MR85

AM/FM Tuner

Dual-Tuner Operation

As an expansion option, a

McIntosh Dealer may add an

additional tuner module. This

is ideal for multizone systems,

because it creates two tuners

that can be used simultaneously.

Weighted Flywheel
For Manual Tuning

An optically encoded

weighted flywheel for “dialing

in” stations, reminiscent of the

smooth-acting flywheel found

in classic McIntosh tuners.

Custom Naming

All station presets for each

tuner may be labeled with a

name containing as many as

8 characters. For example,

FM preset 1 could be re-

named “JAZZ 1” or “WHRW.”

Spatializer Enhancement

This circuit can expand

the sound field for FM stations

that have poor separation, or

it can provide a pseudo-stereo

effect for AM stations.

DMOS-FET RF Amplifier

This circuit provides very

high sensitivity with

ultra-low distortion.

FM TUNER SPECIFICATIONS

USEABLE SENSITIVITY

14dBf (1.4uV across 75 ohms)

50dB QUIETING SENSITIVITY

Mono: 19dBf

(2.4uV across 75 ohms)

Stereo: 35dBf

(15uV across 75 ohms)

SIGNAL-TO-NOISE RATIO

Mono: 75dB
Stereo: 70dB

FREQUENCY RESPONSE

Mono: 20Hz to 15kHz, +0/-1dB
Stereo: 20Hz to 15kHz, +0/-1dB

HARMONIC DISTORTION

Mono: 0.3% at 100Hz,

1kHz and 10kHz

Stereo: 0.45% at 100Hz and 1kHz;

0.65% at 10kHz

INTERMODULATION DISTORTION

Mono: 0.25%
Stereo: 0.45%

CAPTURE RATIO

1.2dB

ALTERNATE CHANNEL SELECTIVITY

75dB

SPURIOUS RESPONSE

100dB

IMAGE RESPONSE

75dB

RF INTERMODULATION

65dB

STEREO SEPARATION

45dB at 100Hz and 1kHz
35dB at 10kHz

SCA REJECTION

65dB

AM TUNER SPECIFICATIONS

SENSITIVITY

20uV (external antenna input)

SIGNAL-TO-NOISE RATIO

48dB at 30% modulation
58dB at 100% modulation

FREQUENCY RESPONSE

Mono: 20Hz to 15kHz, +0/-1dB
Stereo: 20Hz to 15kHz, +0/-1dB

HARMONIC DISTORTION

0.5% max at 50% modulation

FREQUENCY RESPONSE

50Hz to 6kHz NRSC

ADJACENT CHANNEL SELECTIVITY

45dB minimum IHF

IMAGE REJECTION

65dB min, 540 kHz to 1600kHz

IF REJECTION

80dB minimum

GENERAL

RATED OUTPUT

1.2V Fixed
0-1.2V Variable

OUTPUT IMPEDANCE

Less than 100 ohms

POWER REQUIREMENTS

120V 50/60Hz, 20W

OVERALL DIMENSIONS (H X W X D)

5 3/8" (13.8 cm) x 17 1/2"
(44.5 cm) x 17 1/2" (44.5 cm)

WEIGHT

25.5 lbs. (11.6 kg) net
43 lbs. (19.5 kg) boxed

Linear Phase,

Piezoelectric If Filters

Never requiring adjustment,

these filters – together with the

associated IF amplifier – provide

more than 120dB of gain and

selectivity greater than 90dB.

10.03.MR85.20k.JCP 35003700.RevA