burfieldstuff

@ ChrisZang been there done that (4 ohms per side) and it sounds like cr*p really p*ss poor volume for some reason.

plan b for me is fit an amp.

steve

Burfieldstuff, are those the stock speakers that are in the rear sub? Or are they aftermarket?

Those are the factory/stock speakers. I replaced them in mine with the Focal Kevlar series. Same speakers in the factory door box's and then MB Quart Ref's in the front.

With the factory Becker head unit and amp it sounds decent. 100% better then it was. Have ordered 2 new JL Audio amps and a new Nakamichi deck to make it sound even better.

did you just replace the woofers in the box, what were the impedance please mate.

cheers

steve

it sounds crap!........

i need an amp :-)

Burfieldstuff, are those the stock speakers that are in the rear sub? Or are they aftermarket?

i have made myself a wiring harness that will connect direct to my becker iso connector so i wont need an amp, and yes i rewired the speakers in series to keep the impedance within my units limits, i got it down to 4.6 ohms by splitting 50% 50%, not ideal i know sound wise but i will give it a go.

i found an excellent writeup........................

in my ignorance i didnt get a name to credit this to but thanks anyway...............

1. The correct way:

You need two cross-over filters, one for high and one for low.

Typically, the low cross-over is available (built-in) on amplifiers with woofer out, the high cross-over is just a coil and capacitor (buy anywhere). This way you can regulate the bass and treble seperately.

Make sure that the amp you connect to the woofer can handle the very low impedance. (High current amps). Most amps will fry themselves when connected to the woofer (including your TrafficPro and existing Nokia amp).

2. The simple way:

Connect each subwoofer in series to a tweeter, and break the parallel connection. This raises the impedance on the left and right channel to (2+1) 3 Ohms which is ok with most amplifiers. The disadvantage is that the bass and treble cannot be seperated, and the maximum power is somewhat limited (although the 5.25" size also limits this). This way you can connect them to the Traffic Pro directly.

On your Traffic Pro, you should find both connector B and C1 being unused.

If you go for option 1 (new amp), you connect your (new) amp to the pins in connector C1:

C1: line output rear left

C2: line output rear right

C3: line output ground

C6: subwoofer line output

Note that C6 is full-range, not low-range. You still need a cross over filter if you connect to a sub (but the Bose 5.25" speakers can handle full range I understand)

You will also need to connect A5 (remote power on lead) to the amp.

If you select option 2 (speakers in series) you should use connector B directly to the speakers:

B1: loudspeaker rear right +

B2: loudspeaker rear right -

B7: loudspeaker rear left +

B8: loudspeaker rear left -

Do not mix options 1 and 2.

steve

i have the bose bass box which i recently i bought from eb*y, i have the front speakers on my car only and a becker tp sat nav which has exactly the same connections as the original porsche head unit.

what i need to know is what harness would i need to connect the bass box to the head, does it need an amp or just a straight connection direct from head to speakers.

here is a few pics of the box stripped down (just the one side) and the connector.

thanks

steve