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Old 07-06-2005, 01:29 AM   #12
SVXdc
Scooby Specialist
 
Member#: 25837
Join Date: Oct 2002
Chapter/Region: South East
Location: Atlanta, GA
Vehicle:
1996 SVX L AWD
Laguna Blue Pearl

Default McIntosh System

Subaru McIntosh Premium Audio System

A factory option on some Legacies and Outbacks was a McIntosh premium audio system. It consisted of a double-DIN HU, a 5-channel amp mounted under the passenger seat, and 11 speakers in 7 locations (a coaxial pair on each door, two tweeters, and subwoofer).

(picture from Edmunds.com 2002 Outback review here)
Subaru model number PF-2343I-A (note last character is letter "i" not digit "one" -- many people erroneously list this as model "PF-23431-A").

More pictures and specs in this Sound and Vision article: Subaru Teams With McIntosh Audio To Produce A Landmark Sound System (reprinted in the Winter 2002 Subaru Drive magazine).

Another review on autospeed.com (Australia): Subaru Liberty B4 Tech Overload (scroll down to the section on "Electronics").

Later years dropped the cassette in favor of a 6-disc CD transport...


Pictures from this thread: FS: Subaru Legacy McIntosh 6-Disk Changer Stereo
Subaru part number PF-2520I-A (note last character is letter "i" not digit "one"). Supposedly it has the same internals as the aftermarket McIntosh MX-406.

Subaru McIntosh Head Unit harness
The McIntosh HU has the standard 14-pin harness with the same pin-out as on other Legacies/Outbacks. However, since it has no speaker outputs, those wires either are omitted from the car's harness or dead-end at one of the interconnect harnesses behind the dash. The other wires for power, illumination, dimmer, and power antenna are all at the standard pin positions.

DIN Interconnect harness
The HU connects to the amp via a round, 13-pin DIN plug.

(view of plug on long interconnect or "umbilical" harness)
Pin-out:

(this orientation is looking at the pins side of the HU's female socket, wires pointing away from you, opposite of the above picture)
Code:
       _
      | |
 4   3   2   1
 8   7   6   5
12  11  10   9
      13

 1  Front Left +
 2  Front Left 
 3  Front Right +
 4  Front Right 
 5  Amp Remote Turn-On
 6  Ground
 7  Rear Left +
 8  Rear Left 
 9  NC
10  NC
11  Rear Right +
12  Ground
13  Rear Right 
(pin-out by "condensr" from this thread: Pinout of 13 pin din Amp Connector on McIntosh HUs

With the 13-pin DIN, the Mc HU sends only the 4 main speaker channels. The Mc amp derives the subwoofer output from those (there is no 5th channel line-level sub signal from the HU).

See pictures and more information about the Mc amp here (including excellent pictures of its PC board):
McIntosh EF-1080I Information
The Mc amp has an internal 25 Amp fuse.

Also see NZlamb's write-up on how to tweak the subwoofer gain (requires micro-surgery and fine soldering skills).

Later years changed to a similar round 20-DIN plug.

(view of socket on HU's short "pigtail" harness)
Pin-out:
Code:
    3    2    1
 8   7   6   5   4
13  12  11  10   9
18  17  16  15  14
  20          19
        |_|


 1  Ground
 2  Subwoofer +
 3  Subwoofer -

 4  Rear Left +
 5  Rear Left 
 6  Ground
 7  Front Right +
 8  Front Right 

 9  NC
10  NC
11  Ground
12  NC
13  NC

14  Rear Right +
15  Rear Right 
16  Amp Remote Turn-On
17  Front Left +
18  Front Left 

19  NC
20  NC
Mc HUs with the 20-pin DIN connection send a 5th-channel line-level subwoofer output (in addition to the 4 main speaker outputs).

Subaru McIntosh Amplifier Unit harness
On some models/years, the amplifer uses the same style 14-pin connector for power and speaker outputs as the HU. Its pin-out is mostly the same as the HU's, but has a handful of different pins (since the amp has no illumination or antenna, but does have a subwoofer output). Pin-out (viewing pins on car's harness, wires pointing away from you):
Code:
 1  2  3        4  5  6
 7  8  9 10 11 12 13 14

 1*  +12V Battery (via 20 Amp fuse in Relay Block)
 2   Front Right Speaker +
 3   Front Left Speaker +
 4   Rear Right Speaker +
 5   Rear Left Speaker +
 6*  Subwoofer + (polarity not certain, but likely)

 7*  +12V Battery (via 20 Amp fuse in Relay Block)
 8   Front Right Speaker 
 9   Front Left Speaker 
10*  Ground
11   Ground
12   Rear Right Speaker 
13   Rear Left Speaker +
14*  Subwoofer  (polarity not certain)
* Different from standard Subaru 14-pin radio harness

On other models/years, the amp harness uses an 18-pin connector (same family as the 14-pin). Pin-out (viewing pins on car's harness, wires pointing away from you):
Code:
 1  2  3  4        5  6  7  8
 9 10 11 12 13 14 15 16 17 18

 1   +12V Battery
 2   Front Right Speaker +
 3   Front Left Speaker +
 4   NC
 5   Subwoofer +
 6   Rear Right Speaker +
 7   Rear Left Speaker +
 8   Ground

 9   +12V Battery
10   Front Right Speaker 
11   Front Left Speaker 
12   NC
13   NC
14   NC
15   Subwoofer 
16   Rear Right Speaker 
17   Rear Left Speaker +
18   Ground
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Last edited by SVXdc; 05-14-2013 at 10:40 PM.
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