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> Premium 8 Speaker System, Details/questions on the stock system
post Apr 18, 2004 - 5:22 AM
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mportobello

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What I have found so far from my 1997 GTS hatchback....

Overview
The system has 1 head unit, 2 amplifiers and 8 speakers. The head unit is a double DIN CD/cassette unit without a built-in amplifier. The primary amp is underneath the A/C controls, the secondary amp is under the driver's seat. On the front door, there is a 1" tweeter, a 4" mid and an 8" mid. The rear sub is mounted beside the rear passenger. Are these the correct names for these speakers? "Mid", "Sub", "Tweeter"? Is the rear really a sub? Can you suggest better names?

Amps
The primary amp provides battery power, ACC and ground to the head unit and, I believe, also to the secondary amp. The amp accepts line-level audio from the head unit and passes it on to the secondary amp.

The primary amp drives the front tweeters, front 4" mids, and rear subs. The secondary amp only drives the front 8" mids. The front tweeters and 4" mids are wired in parallel to the primary amp. All other speakers are wired directly to the amps.

The primary amp is easy to find, but difficult to remove. It is mounted by 4 bolts, 2 along each side. You need to remove the trim piece that surrounds the amp and holds the A/C controls and shifter trim. However to remove this piece you need to remove the shifter knob, shifter trim, center console, lower driver's side dash and the glove box and teh A/C controls. To access the secondary amp remove the driver's side seat. You can disconnect the wiring if you move the seat all the way back.

The amps are manufactured by Fujitsu Ten Limited. According to my dealer the amps were manufactured from Sep 1993 - Aug 1999. They should be the same part for all 6th generation Celicas with the premium 8 speaker system. For the primary amp, they produced 2 versions with different part numbers. Both versions are compatible.

Speakers
The speakers cones are made from a paper-like material. Mine are starting the warp. All the speakers appear to use custom mounting. It is unlikely you can just bolt on an aftermarket speaker.

The front tweeter and front 4" mid are wired in parallel to the primary amp. All other speakers are wired directly back to the amp.

To access front tweeter, remove the plastic cover by pulling directly away from the window. To the access the other front speakers remove the door panel (see the How To on installing 6.5" speakers for instructions and pictures). I haven't tried to access the rear speakers. I believe it involves removing the reat seats.

Wiring
Speaker and power wiring comes in one bundle from under steering wheel to the left side of the amp. This bundle terminates with 3 connectors: 2 blue, 1 white. The blue connectors are the standard Toyota wiring harness. The 1 white connector contains 4 wires which run to the front 8" mids. These 3 connectors are actually mounted underneather the amp by plastic clips.

From these 3 connectors, the wires are routed to the 2 amps. From the primary amp is a bundle of wires that runs to the head unit. Metra sells a wiring harness that plugs into this bundle. It is called an amplifier integration harness (Metra part 70-8112). It provides 4 RCA connectors for line-level audio as well as the other standard wires: battery, acc, ground, power antenna and amp turn on.

Installing a new head unit
When installing a new headunit you have a few wiring choices:

1) Use the existing amps. Purchase the amp integration harness, manufactured by Metra. Part number is 70-8112. This lets you use all 8 speakers without buying a new amp and it is easy to install. Just replace the headunit. The amps expect line-level audio, so you may need to get a converter (do they make speaker-to-linelevel converters?). Search the board for Metra for more info on using this harness. You will likely have to purchase it from a specialty car audio retailer and ask for it by part number otherwise you may get the generic Toyota harness used in option #2 below.

As a test, I have successfully used this Metra connector and gotten a Discman hooked up to the existing 8 speakers. Sounded great. To perform this test, I used a headphone-to-RCA wire to connect to the harness. To turn on the amp I wired the yellow battery lead (from the harness) to a diode to a 1K ohm resistor to the Blue/White Amp TurnOn (from the harness). Be very careful with exposed wires! I accidentally let the yellow battery wire touch ground and ZAP, no sound and a funny smell. I now have 1 dead amp!

2) Bypass the existing amp but use the existing wiring. Purchase the generic 94-99 Toyota wiring harness from WalMart. Connect it to the 2 blue connectors under the primary amp. This connector goes to the existing speakers, except the front 8" mids. Search the board for Install Doctor, they have PDF tutorial with pictures. You will need a 4 channel amp. Will a 4 ohm stable amp suffice? Since the tweeter and 4" mid are wired in parallel, do you need a 2 ohm stable amp? With a multimeter, the tweeter shows infinite resistance so the 2 speakers appear as a 3.6 ohm load. I imagine you can splice into the 1 white connector to get at the front 8" speakers.

3) Bypass the existing amp and wiring. Run you own wire to the speakers. The difficulty is finding an amp to drive all 8 speakers and running new wire. See the How To section on this site for tips on running wire. What specs should you look in an aftermarket amp to drive all 8 stock speakers? Power rating, # channels at what ohm rating?


Speaker Size
Front Tweeters ....... 1"
Front 4" Mids .......... 3.5" - 4.25"
Front 8" Mids .......... 7.5" - 8.25"
Rear Subs ............... 6"
How do you measure speaker size? Size of the cone or size of cone + mounting hardware?

Impedance and Power
These specs were taken by markings on or near the speaker where available.
Front Tweeters ....... 4 ohm
Front 4" Mids .......... 4 ohm, 15 W
Front 8" Mids .......... ?
Rear Subs ............... ?

Measured Resistance with Multimeter
Front Tweeters ....... infinte
Front 4" Mids .......... 3.6 ohm
Front 8" Mids .......... 1.8 ohm
Rear Subs ............... 5.3 ohm
How do you measure impedance? Can you measure DC resistance to get a ballpark number? Why do I get infinte resistance when I measure the tweeter? Is it because of the capacitor attached to the speaker?

Speaker Wire Colors
Front Tweeters ....... Left: Pink/Grey, Purple/Grey; Right:?
Front 4" Mids .......... Left: Pink/Grey, Purple/Grey; Right:?
Front 8" Mids .......... Left: Blue/Red (+), Blue/Black (-); Right:?
Rear Subs ............... ?

Part Numbers
Front Tweeters ....... 86160-2B180
Front 4" Mids .......... 86160-2B200
Front 8" Mids .......... ?
Rear Subs ............... ?
Primary Amp ........... 8628020371, 8628020371 (older revision)
Secondary Amp ...... ?

References
Metra Amp Integration Plug: 70-8112
How to remove the door panel
Installing 6.5" Components In the Front
Installing 8" Subwoofers in the Front Doors


Do you have any information to add? Any corrections? Please post!

Brian

This post has been edited by mportobello: Apr 18, 2004 - 11:48 PM
post Apr 18, 2004 - 9:11 PM
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shid



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Where did you find ALL that information?
post Apr 19, 2004 - 9:00 PM
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turboinduction



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Anyone have a pic of the 8 speaker setup. Id like to see what it looks like with the door panel removed. Where are the extra 2 speakers!!!
post Apr 19, 2004 - 10:42 PM
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Drocay



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2 speakers each door 1 speaker next to each piller and 2 speakers in back.


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post Apr 20, 2004 - 1:20 PM
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saleeka



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all I know is that the 8-speaker setup had 220 watts of power from the factory...


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Car #2: 95 Celica GT- purchased 8/03, current daily driver
Car #1: 01 Focus ZX3- purchased 5/01, sold 8/03
post Apr 20, 2004 - 11:46 PM
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mportobello

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So the tweeter and 3" speaker are wired in parallel. They have stickers on both saying 4 ohms. I would think that means they present a 2 ohm load to the amp.

When I measure their resistance with a multimeter the tweeter has infinite resistance (it does not conduct) so the total parallel load of both speaker is about 3.6 ohm.

So do I only need a 4 ohm stable amp to power these 2 speakers?
post Dec 21, 2009 - 4:17 PM
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BloodyStupidDave...



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Back from the dead. Why on earth wasn't this awesome thread stickied?

QUOTE (mportobello @ Apr 18, 2004 - 10:22 AM) *
What I have found so far from my 1997 GTS hatchback....

Overview
The system has 1 head unit, 2 amplifiers and 8 speakers. The head unit is a double DIN CD/cassette unit without a built-in amplifier. The primary amp is underneath the A/C controls, the secondary amp is under the driver's seat.



(image courtesy azian_advanced)

The primary amp on some Celicas is actually an amp and a digital signal processsor (DSP) bolted together. The Amp has three connectors, the DSP has a single 10-pin connector (7 of which are used) which goes to a 8-pin connector on the radio. Tthis ia all in addition to the secondary Amp. under the LHS seat (it is always under the L seat regardless of whether the car is LHD or RHD)).

[snip]

QUOTE (mportobello @ Apr 18, 2004 - 10:22 AM) *
Metra sells a wiring harness that plugs into [the wiring harness] bundle [from the Radio]. It is called an amplifier integration harness (Metra part 70-8112). It provides 4 RCA connectors for line-level audio as well as the other standard wires: battery, acc, ground, power antenna and amp turn on.




Since that was written, a few other manufacturers have released similar products. So you now have a choice between:
* Metra 70-8112
* BestKits BHA8110 (pigtails used for all wires, no RCAs)
* BestKits BHA8112 (4 RCAs, 5 pigtails)
* Xscorpian Toy-4960
* Autoleads PC9-41 Toyota 15 way (4 RCAs, ISO connector, 1 bullet connector for aerial
* Scosche

Speaker Size
Front Tweeters ....... 1" (2.5cm)
Front 4" Mids .......... 4" (10cm)
Front 8" Subs .......... 8" (20cm)
Rear full-range ............... 6.5" (16cm)

Impedance and Power
These specs were taken by markings on or near the speaker where available.
Front Tweeters ....... 4 ohm
Front 4" Mids .......... 4 ohm, 15 W
Front 8" Subs .......... 2 ohm, 25 W
Rear full-range ............... ?

Speaker Wire Colors
Front Tweeters ....... Left: Pink/Grey, Purple/Grey; Right: Blue, Light Green
Front 4" Mids .......... Left: Pink/Grey, Purple/Grey; Right: Blue, Light Green
Front 8" Subs .......... Left: Blue/Red (+), Blue/Black (-); Right: Green/Black (+), Green (-)
Rear full-range ............... Left: Black, Yellow; Right: Red, White

Part Numbers



(Images courtesy of azian_advanced: [thread])

Front Tweeters ....... 86160-2B180 (L), 86160-2B170
90333-20001 fixings (4)
67492-20330 LH tweeter door mirror triangle cover / trim
67491-20330 RH tweeter door mirror triangle cover / trim

Front 4" Mids .......... 86160-2B200 (L), 86160-2B190
67709-20060-C0 LH 4" speaker grille and trim
67609-20060-C0 RH 4" speaker grille and trim

I believe that the 4" speaker actually requires a different door card and door internals, it isn't simply a cut and bolt job. Sorry don't have part numbers for the fixings for these.

Front 8" Subs .......... 86160-2B160 (2)
67651-20080 ........... 8" speaker grille for 8" or 6.5 speaker (LH or RH)
90168-40048 ........... fixings (6 per speaker grille)

Rear full-range ............... 86160-2B220 (L), 86160-2B210

Primary Amp ...................................... 86280-20371, 86280-20370 (older revision)
Primary Amp with separate type DSP..... 86280-20380
Secondary Amp .................................. 86280-20390


Part Numbers - 6 speaker setup (not for 8 speaker setup)
Front 6"-in-8"-housing mids .......... 86160-2B150 (2)

Amp (under climate control in centre console): 86280-20402, 86280-20401 (older revision)

References & related links
Metra Amp Integration Plug: 70-8112
BestKits 15-Pin Toyota Premium plug with RCA
XScorpion 15-pin Toyota / Lexus 92-up premium amplifier intergration harness
How to remove the door panel
How to upgrade the stock 4" speakers in the Front Doors
Installing 6.5" Components In the Front
How to upgrade to 8" Subwoofers in the Front Doors
How to upgrade the rear speakers
How to install aftermarket radio (4 speaker or 6 speaker Celica Audio)
8-Speaker Diameters (Metric)
6-Speaker Wiring Diagram
8-Speaker Wiring Diagram
Door Panel Part Numbers & Prices (for 8 Speaker System)
OEM Speaker Part Numbers & Prices (for 8 Speaker System)

This post has been edited by BloodyStupidDavey: Dec 28, 2009 - 2:12 PM


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post Dec 21, 2009 - 4:26 PM
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BloodyStupidDave...



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QUOTE (turboinduction @ Apr 20, 2004 - 2:00 AM) *
Anyone have a pic of the 8 speaker setup. Id like to see what it looks like with the door panel removed. Where are the extra 2 speakers!!!



(image courtesy azian_advanced)


(image courtesy coomer)


This post has been edited by BloodyStupidDavey: Dec 21, 2009 - 4:36 PM


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post Dec 21, 2009 - 4:40 PM
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azian_advanced



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here's a few more helpful links to add:

8-Speaker Diameters (Metric)
6-Speaker Wiring Diagram
8-Speaker Wiring Diagram
Door Panel Part Numbers & Prices (for 8 Speaker System)
OEM Speaker Part Numbers & Prices (for 8 Speaker System)


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post Dec 22, 2009 - 7:49 AM
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99GT

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Good thread.
post Dec 22, 2009 - 1:54 PM
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nsxtypeR



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I was planning to convert to the 8 speaker system, but now i know the $$$$$$$$...............

Damn..... those door cards are ridiculous expensive mad.gif


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post Dec 23, 2009 - 12:42 AM
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freddy121389



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really to have a good system you don't need 8 speakers, granted it probably will have better sound throughout the car, you can get a good 6 1/2 set of components in the front and 6 1/2s in the back and it would sound the same. the 8 set is definitely more superior stock even though the 6 setup is pretty darn good for stock. All you need are a good set of tweeters for highs, mids in the front and rear and some really clear subs in the back and you're set. I recently downgraded my alpine 12inch type R for 2 p2 8inch subwoofers from rockford fosgate and they sound so clear and add such depth to the stock system. They definitely aren't as loud but im not about attention or going deaf at the age of 30. If anyone needs speaker advice I could definitely help, when I get bored that's all I do is research systems and ratings and prices just so I'm knowledgable when someone needs advice and also it really interests me.


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post Dec 23, 2009 - 8:10 AM
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Cavegod



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you can fit the 2 4" speakers in the door cards easy enough, i've done it.
post Dec 23, 2009 - 4:16 PM
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nsxtypeR



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Do you have any pictures?



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post Dec 23, 2009 - 5:44 PM
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Cavegod



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http://www.celica-club.co.uk/forum/index.p...t&p=1121959
post Dec 25, 2009 - 2:37 PM
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nsxtypeR



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thumbsup.gif


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post Mar 9, 2010 - 4:33 PM
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Xvani

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Hey guys!
Can you take a look at:
http://www.6gc.net/forums/index.php?showtopic=72624

Could be important for the correctness of this thread. Thanks!
post May 30, 2010 - 7:07 PM
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TerryE

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Just a little note in regards to the "Large front speakers": they are "woofers" not "subwoofers" the frequency range is considerably different(subs are way lower). Also in regards to impedance, without being too technical impedance is the "opposition to a given audio frequency" but it's not referred to as resistance because it varies dependent on the input signals frequency and it is not "pure" resistance being composed of resistance, inductance and capacitance. Also when my 8" speakers went I replaced with 8 ohm Pioneers, sound sucked completely, Mids and tweeters were way too loud, had to lower them with the EQ. Only source I've found for 8" woofers 2 ohm is Memphis Audio. they make them for marine use. Haven't bought them yet though.

QUOTE (mportobello @ Apr 18, 2004 - 5:22 AM) *
What I have found so far from my 1997 GTS hatchback....

Overview
The system has 1 head unit, 2 amplifiers and 8 speakers. The head unit is a double DIN CD/cassette unit without a built-in amplifier. The primary amp is underneath the A/C controls, the secondary amp is under the driver's seat. On the front door, there is a 1" tweeter, a 4" mid and an 8" mid. The rear sub is mounted beside the rear passenger. Are these the correct names for these speakers? "Mid", "Sub", "Tweeter"? Is the rear really a sub? Can you suggest better names?

Amps
The primary amp provides battery power, ACC and ground to the head unit and, I believe, also to the secondary amp. The amp accepts line-level audio from the head unit and passes it on to the secondary amp.

The primary amp drives the front tweeters, front 4" mids, and rear subs. The secondary amp only drives the front 8" mids. The front tweeters and 4" mids are wired in parallel to the primary amp. All other speakers are wired directly to the amps.

The primary amp is easy to find, but difficult to remove. It is mounted by 4 bolts, 2 along each side. You need to remove the trim piece that surrounds the amp and holds the A/C controls and shifter trim. However to remove this piece you need to remove the shifter knob, shifter trim, center console, lower driver's side dash and the glove box and teh A/C controls. To access the secondary amp remove the driver's side seat. You can disconnect the wiring if you move the seat all the way back.

The amps are manufactured by Fujitsu Ten Limited. According to my dealer the amps were manufactured from Sep 1993 - Aug 1999. They should be the same part for all 6th generation Celicas with the premium 8 speaker system. For the primary amp, they produced 2 versions with different part numbers. Both versions are compatible.

Speakers
The speakers cones are made from a paper-like material. Mine are starting the warp. All the speakers appear to use custom mounting. It is unlikely you can just bolt on an aftermarket speaker.

The front tweeter and front 4" mid are wired in parallel to the primary amp. All other speakers are wired directly back to the amp.

To access front tweeter, remove the plastic cover by pulling directly away from the window. To the access the other front speakers remove the door panel (see the How To on installing 6.5" speakers for instructions and pictures). I haven't tried to access the rear speakers. I believe it involves removing the reat seats.

Wiring
Speaker and power wiring comes in one bundle from under steering wheel to the left side of the amp. This bundle terminates with 3 connectors: 2 blue, 1 white. The blue connectors are the standard Toyota wiring harness. The 1 white connector contains 4 wires which run to the front 8" mids. These 3 connectors are actually mounted underneather the amp by plastic clips.

From these 3 connectors, the wires are routed to the 2 amps. From the primary amp is a bundle of wires that runs to the head unit. Metra sells a wiring harness that plugs into this bundle. It is called an amplifier integration harness (Metra part 70-8112). It provides 4 RCA connectors for line-level audio as well as the other standard wires: battery, acc, ground, power antenna and amp turn on.

Installing a new head unit
When installing a new headunit you have a few wiring choices:

1) Use the existing amps. Purchase the amp integration harness, manufactured by Metra. Part number is 70-8112. This lets you use all 8 speakers without buying a new amp and it is easy to install. Just replace the headunit. The amps expect line-level audio, so you may need to get a converter (do they make speaker-to-linelevel converters?). Search the board for Metra for more info on using this harness. You will likely have to purchase it from a specialty car audio retailer and ask for it by part number otherwise you may get the generic Toyota harness used in option #2 below.

As a test, I have successfully used this Metra connector and gotten a Discman hooked up to the existing 8 speakers. Sounded great. To perform this test, I used a headphone-to-RCA wire to connect to the harness. To turn on the amp I wired the yellow battery lead (from the harness) to a diode to a 1K ohm resistor to the Blue/White Amp TurnOn (from the harness). Be very careful with exposed wires! I accidentally let the yellow battery wire touch ground and ZAP, no sound and a funny smell. I now have 1 dead amp!

2) Bypass the existing amp but use the existing wiring. Purchase the generic 94-99 Toyota wiring harness from WalMart. Connect it to the 2 blue connectors under the primary amp. This connector goes to the existing speakers, except the front 8" mids. Search the board for Install Doctor, they have PDF tutorial with pictures. You will need a 4 channel amp. Will a 4 ohm stable amp suffice? Since the tweeter and 4" mid are wired in parallel, do you need a 2 ohm stable amp? With a multimeter, the tweeter shows infinite resistance so the 2 speakers appear as a 3.6 ohm load. I imagine you can splice into the 1 white connector to get at the front 8" speakers.

3) Bypass the existing amp and wiring. Run you own wire to the speakers. The difficulty is finding an amp to drive all 8 speakers and running new wire. See the How To section on this site for tips on running wire. What specs should you look in an aftermarket amp to drive all 8 stock speakers? Power rating, # channels at what ohm rating?


Speaker Size
Front Tweeters ....... 1"
Front 4" Mids .......... 3.5" - 4.25"
Front 8" Mids .......... 7.5" - 8.25"
Rear Subs ............... 6"
How do you measure speaker size? Size of the cone or size of cone + mounting hardware?

Impedance and Power
These specs were taken by markings on or near the speaker where available.
Front Tweeters ....... 4 ohm
Front 4" Mids .......... 4 ohm, 15 W
Front 8" Mids .......... ?
Rear Subs ............... ?

Measured Resistance with Multimeter
Front Tweeters ....... infinte
Front 4" Mids .......... 3.6 ohm
Front 8" Mids .......... 1.8 ohm
Rear Subs ............... 5.3 ohm
How do you measure impedance? Can you measure DC resistance to get a ballpark number? Why do I get infinte resistance when I measure the tweeter? Is it because of the capacitor attached to the speaker?

Speaker Wire Colors
Front Tweeters ....... Left: Pink/Grey, Purple/Grey; Right:?
Front 4" Mids .......... Left: Pink/Grey, Purple/Grey; Right:?
Front 8" Mids .......... Left: Blue/Red (+), Blue/Black (-); Right:?
Rear Subs ............... ?

Part Numbers
Front Tweeters ....... 86160-2B180
Front 4" Mids .......... 86160-2B200
Front 8" Mids .......... ?
Rear Subs ............... ?
Primary Amp ........... 8628020371, 8628020371 (older revision)
Secondary Amp ...... ?

References
Metra Amp Integration Plug: 70-8112
How to remove the door panel
Installing 6.5" Components In the Front
Installing 8" Subwoofers in the Front Doors


Do you have any information to add? Any corrections? Please post!

Brian
post May 30, 2010 - 7:53 PM
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zfjohnson07

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can you take a pic of the primary amp is underneath the A/C controls, the secondary amp is under the driver's seat. i want to see what it looks like
post May 30, 2010 - 8:27 PM
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kavy



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This is the secondary amp from my 6-speaker stock setup.(under the passenger seat i.e on a RHD celica)






This is the secondary amp from my 6-speaker stock setup.(under the passenger seat i.e on a RHD celica)




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