Audio
Speaker Sizes
- Two 4" dash mounted speakers (all models).
- The rear pillar (b-pillar) speakers are 3.5" (1987+).
- ‘Sub’ mounted under the drivers seat (optional in 1985/86???; all models 1987+).
Dash Speaker
Almost any 4" speaker will work. You just have to cut off two of the mounting tabs with a tin snips (bend them back flat) and they should drop right in and attach with the remaining two tabs. You then effectively convert it to the obscure “4T” style that is difficult to find these days. Alpine SPS-100A fit perfectly with the two tabs trimmed. Don’t choose a speaker with a tweeter that sticks out, otherwise it will hit the grille. Also, try to stay with something under 2" in depth (not a problem with most 4"). A depth of 2" and over and the drivers side speaker will hit the structural bar in the dash.
The actual mount points are approximately 119mm (4.685") apart. The actual hole is about 96mm (3.779") in diameter.
Many people have had success with cheap Pyramid 409G replacements, from eBay. Other options, which have not been tried:
The lists below are for a variety of 4" speakers, which should fit. Search around for best price.
B Pillar Speaker
The actual mount points are about 117mm (4.606") apart. The bottom one is substantially longer than the upper one. You’ll either have to use a washer or come up with an alternative mounting method.
The hole itself is approximately 74mm (2.924") tall and 100mm (3.937") in it’s widest point.
List of suitable replacements:
- Blaupunkt GTx 352 Mk II
Door Mounted Speaker
Although not standard, it is possible to get 5.5" or 6.5" speaker in the door.
Sub-woofer
- The ‘sub-woofer’ is in a box under the drivers seat.
- The subwoofer speaker is 2" deep; cone size, 4"; external 4.5" diameter – across outer edge of speaker frame 4ohm, 12V.
- There is a difference between LHD and RHD version.
The woofer box is 6.25" x 7.25" x 2.5". You could put a bigger box under there. Around 7x10, and 3" deep. The floor is a little uneven down there, but that size *should* be okay.
Plastic subwoofer will accept almost any 100mm (4") speaker. Like the Pioneer TS-G1010F for example.
Examples of non-stock sub locations: http://www.mr2oc.com/showthread.php?t=141569
Detailed photos of disassembled and reassembled RHD subwoofer: https://mega.nz/#F!UPwEUKwD!ycnVa414wW_obkBPW81dWA
User comments
Ben — 20 November 2009, 14:50
My June 1985 production car (sold as a 1985 MY) has an OEM subwoofer, wiring, and mounting points for it. Perhaps it was not available on early 1985 MY cars, but after a certain production date? Please add info if you have it.
mr21990 — 13 February 2011, 21:07
we have an 86 model that has that subwoofer
NeilJones308 — 02 August 2016, 03:48
In the UK, all Mk1a (without rear speakers) had the under seat subwoofer, all Mk1b (with rear speakers) did not have the subwoofer.