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-   -   Z3 Sub box with 1 sub, anyone have one kicking around? (

icucmeuc 01-17-2013 02:19 PM

Z3 Sub box with 1 sub, anyone have one kicking around?
I just pulled the sub box in my 1999 with the HK business system and it is the two sub configuration. I had hoped it would be the 1 sub box so I could drop the kicker in there and be done with it (I really DO NOT want to build a custom box for this).

Anyone out there that has done a custom box and has the original 1 sub box willing to part with it? *Or* does anyone know of a write up (I can't find one) of how to modify the two sub box to accept one 6.5" sub? (not holding my breath on the second one :)

Thanks very much !

Blacklane 01-18-2013 06:47 AM

I think you are several years late for this. The single-speaker sub boxes are no longer available and have been bought-up by users making this same retrofit. It's pretty rare to find one now.

There is not much chance of retrofitting a single speaker into the 2-speaker box. The remaining holes are too large and in the wrong places.

You can replace the two speakers. If you're using the stock amp, just use two 5 1/4" 2- or 4-ohm speakers. (The originals were about 3 ohms). If you have an aftermarket sub amp, use two 8-ohm speakers wired in parallel with reversed polarity to create a single 4-ohm channel. (You have to reverse the polarity since they are mounted back-to-back).

Or you can make a sub box. It's not that hard. I made one out of fiberglass:

icucmeuc 01-18-2013 12:05 PM

Thanks very much for the link :) It does still look like a lot of work. Hmm... At least it's January and I have some time to think on this.

icucmeuc 01-18-2013 05:53 PM

Ok thinking done. Gonna pop the stock sub back in and leave the car be. Ordered a new head unit, 2 channel amp, front speakers, and an infinity basslink powered sub. Came in under budget of $750 at $660 so I'm happy, and should be easy enough to install everything in an afternoon.

Now to scour around the forum for wire designations so I can just use the stock stuff. I'll be thrilled if I can get away with running minimal wires....

dkindig 01-19-2013 04:33 PM

2 Attachment(s)
Here's what I have on the two different layouts, color codes translated to English, illustrated, and connector pin designations as well.

Not my work, but from a very industrious and helpful member on the other forum. Given the current requirements of the stock speakers/amps, the existing wiring will be fine. All the existing wiring is twisted-pair too so it is resistant to picking up noise. I upgraded my fronts to 85W per DRIVER on my components so I ran 16ga back up front from the new amp. The sub wiring in my '01 was already around 14ga, so I used the existing wiring for a 250W amp (about 8A at full output).

icucmeuc 01-20-2013 12:53 PM

This is great, thanks very much!

DreamnZ 01-21-2013 06:00 PM

Too bad, I have a sub box from my roadster that I'm not using.

brwndg 05-25-2013 03:25 PM

2000 Z3 in need of a custom Subwoofer box for 6.5"
Just purchased a 2000 Z3 2.3. Has original everything & I want to desperately upgrade the sound system. Seems I will need a custom box to upgrade rear speaker.
Anybody got one they want to sell?

Blacklane 05-25-2013 05:55 PM

No. The 2000s had the more desirable 6.5 inch subwoofer. Just replace it with a Kicker ComptVT65.
Of course you probably need all new speakers and an amplifier as well.

brwndg 05-26-2013 05:35 AM

Blacklane, got in and did some checkiing on my Z's speakers. Looks like the Subs are dual 5 1/4s.

Been looking at just replacing the HU and getting the BSW package. Still will need the rear Subs though. Any suggestions?

brwndg 05-26-2013 06:28 AM

Found this online:

Will this fit to replace Philips Dual 5 1/4 box:

dkindig 05-26-2013 10:11 AM


Originally Posted by brwndg (Post 7610770)

Yes, it will. You might have to make connector changes, but the enclosure will drop in and use the existing screw locations.

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