Freelander Audio System

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Vertuas@googlemail.com - 26 Jul 2008 01:01 GMT

Hello All,

I have found an interesting problem with the freelander (yet another
one).

If I fade all the audio to the front, I appear too loose all the bass,

Fade it to the back bass comes back.

Now the rave wiring diagram shows the tweeters to be seperate from the
door speaker. So it appears that the door speakers are not working.

What would cause both front speaker not to work other than a faulty
head unit?

Anyone??

Many thanks

Vert

P.S. I still haven;t gotten to the bottom of the strange from tyre
wear yet, will you all know if I ever find the issue.

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Gaz - 26 Jul 2008 10:02 GMT

> Hello All,
>
[quoted text clipped - 19 lines]
> P.S. I still haven;t gotten to the bottom of the strange from tyre
> wear yet, will you all know if I ever find the issue.

Are you sure that the front speakers are really NOT working?
If they are connected out of phase with + and - connection reversed on
one of the speakers at the front this would cause the apparent loss of
bass as one effectively cancels out the other. It doesn't matter which
way round + and - are connected as long as all speakers are the same.

Gaz

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Vertuas@googlemail.com - 26 Jul 2008 12:30 GMT

HI Gaz

Thanks for reply.

I had the door panel to sort the window motor out about 5 months ago,
I wonder is I have connected a speaker the wrong way around.

Do the same apply to both the door speakers and the tweeters?

Now that you mention it I seen to remember that the terminals are not
marked! hmmmmmmm

I need to get the panel off again once i have a new window motor (yeah
still not fixed it, its a pain on the dartford crossing open the door
to throw the coins in) so will check it then.

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Vertuas@googlemail.com - 26 Jul 2008 13:02 GMT

HI Gaz

I have just been out and checked.

I put the Fade to the front, And listened to each speaker......nothing
except the tweeters.

Also looked through the grill and there is no movement,

Thinking about it the tweeters a re wired in parallel to the

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Vertuas@googlemail.com - 26 Jul 2008 13:06 GMT

On 26 Jul, 13:02, Vert...@googlemail.com wrote:

HI Gaz

I have just been out and checked.
I put the Fade to the front, And listened to each speaker......nothing
except the tweeters.

Also looked through the grill and there is no movement,

Thinking about it the tweeters are wired in parallel to the door
speaker, according to rave, so the head unit must be outputing to
audio, for the tweeters to work.

Hmmm.....2 new speakers it would appear.

Does anyone know what resistence they are? 8 ohm 15 ohm, so i don;t
have to strip the door to find out?

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EMB - 26 Jul 2008 13:13 GMT

> On 26 Jul, 13:02, Vert...@googlemail.com wrote:
>
[quoted text clipped - 14 lines]
> Does anyone know what resistence they are? 8 ohm 15 ohm, so i don;t
> have to strip the door to find out?

There should be a crossover somewhere to only send the high frequencies
to the tweeters - it may be that the crossovers are borked.

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Gaz - 26 Jul 2008 13:33 GMT

> There should be a crossover somewhere to only send the high frequencies
> to the tweeters - it may be that the crossovers are borked.

There is no crossover shown on the RAVE schematic so most likely the
tweeters have a built-in HF filter.
As the tweeters are in parallel with the main speaker it must be either
knackered speakers or the connection. Maybe the speakers have got wet at
some time, doesn't do them any good and not uncommon.

Gaz

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Derek - 26 Jul 2008 14:14 GMT

>> There should be a crossover somewhere to only send the high frequencies
>> to the tweeters - it may be that the crossovers are borked.
[quoted text clipped - 6 lines]
>
> Gaz

if its the same idea as the old RRC system the filters/Xover are components
built onto the speakers hence no mention in RAVE.
Derek

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Dave Liquorice - 26 Jul 2008 19:16 GMT

> There is no crossover shown on the RAVE schematic so most likely the
> tweeters have a built-in HF filter.

<cough> Built in LF filter. B-)

Signature

Cheers
Dave.

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Gaz - 27 Jul 2008 10:26 GMT

>> There is no crossover shown on the RAVE schematic so most likely the
>> tweeters have a built-in HF filter.
>
> <cough> Built in LF filter. B-)

Ah, well done that man, just testing to make sure you were paying
attention ;-)

Gaz

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Craig - 28 Jul 2008 12:27 GMT

> Hello All,
>
[quoted text clipped - 19 lines]
> P.S. I still haven;t gotten to the bottom of the strange from tyre
> wear yet, will you all know if I ever find the issue.

Tweeters and mid/woofers are wired in parallel.
There is no crossover - the tweeters are capacitively coupled into the
audio system which forms a high-pass filter to drive the tweeter.
You should find the terminals on the rear of the speakers either in a
plastic shroud or of different size - so there should be no way of
connecting them out-of-phase.

Car audio systems measure 4 ohms.
This is true for 99% of applications - that's how they get the higher
power output from the amp - driving into a lower impedance load.

If you measure the cabling from head unit to the front doors - you'll be
measuring the mid/woofer - your multimeter should not read the tweeter
because the capacitor blocks the DC.

Clear as mud?

cheers, Craig.

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