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components, tweeters and Crossovers

Posted: Thu Feb 02, 2012 11:04 pm
by grant_day
I've recently purchased some component speakers and with them came some tweeters and crossovers...
I understand that crossovers are to split the high and low sound frequencies so high go to tweeters and low to components, but there are no installation guides with the box.
Do I connect the crossovers to the amplifier then the components and tweeters to the crossovers?
Also I read somewhere on someplace the crossovers MUST be connected as close to the speakers as possible. Would this make that much difference?
And where is the best place to run the
A) power cable to the amp from battery
Passenger or drivers side
B) phono cables from the head unit to amp
Passenger or drivers side
C) remote cable for the amp
Passenger or drivers side

And.. yes more .. :o

Is it ok to cut holes into my post facelift tweeter covers so the tweeters can sit in them? The brackets that came with just don't want to fit anywhere behind the covers


Thanks to all the Audio specialists that are going to help :mrgreen:

Posted: Thu Feb 02, 2012 11:31 pm
by RattyMcClelland
Components speakers are mids tweeters and crossover. 3 components.

And yes you connect the tweeters to the tweeter output on the crossover and use the tweeter attenuation to the deisre level ie +3 or-3db.
The midbass or midrange goes to the low output and the input on the crossover is from the amplifier. The amp will connect to the headunit via RCAs.
Quite straight forward.

Remote cable switches the amp on from the headunit. Ground the amp near the back of the car onto clean metal and not paint. Power from battery. All wires can be next to each other. It wont make ANY difference. People who say there is interference clearly cant wire properly.

You can mount the crossovers in paris if you want as long as the cable is long enough. 8-) Many people put them in the doors but IMO mount them next to the amplifiers and run all 4 sets of speaker wire to the 4 speakers. Done.

Posted: Thu Feb 02, 2012 11:38 pm
by grant_day
What's the main cause of interference? In a friends car all you can hear is the whine of interference when he accelerates, :roll:
It's really annoying and something I really want to avoid. :)

Posted: Fri Feb 03, 2012 12:34 am
by RattyMcClelland
Thats alternator whine. Basically its a grounding issue where the signal is picking up the voltage from the alt and causing a whine.
Sometimes its hard to remove. Basically to avoid it
- Good quality RCA cables, nothing expensive but nothing each. £10-20 will do.
- Adiquate size power cable. Either 0awg or 4awg and fused properly. 100-150amp on 4awg and 200-300 on 0awg.
- CLEAN GROUND. I use the back most point of the car and sand papered the metal and grounded it there.
- Iv also got new power and ground from my fused distribution block in the boot to the headunit so it all shares a common ground. I onlu use the cars ignition switch for power.
- All cables are fine next to each other but when there is alot you can put the power on the drivers and the RCA on the passengers.
- The Big 3(TB3). Mean upgrading the 3 important wires in the engine bay. The Battery neg to chassis ground, the engine to chassis ground and alternator to battery positive. In the Lude its different on the positive battery side. You need to upgrade the positive to under bonnet fuse box.

Do that and you will be fine.

Posted: Fri Feb 03, 2012 1:15 am
by grant_day
Awesome, will do this as soon as I get a spare couple of hours, thanks :mrgreen:
+ rep 8-)

Posted: Fri Feb 03, 2012 1:06 pm
by indigolemon
RattyMcClelland wrote:... You can mount the crossovers in paris if you want as long as the cable is long enough ...
:shock: Yeah, as long as the cables are long enough :lol:

Posted: Fri Feb 03, 2012 7:44 pm
by RattyMcClelland
Any help needed just post up here. I will help out.
Im in the process of doing it also.

Posted: Thu Feb 09, 2012 8:03 pm
by grant_day
Fitted the crossovers to the top of the glovebox, ...
Image
And cut out the plastic in the tweeter covers and stuck the tweeters to them..
Image

A pic from the front,
Image
I would post a pic of them fitted back in place but.. it looks like it did before i removed them 8-)

Posted: Fri Feb 10, 2012 12:13 pm
by RattyMcClelland
They will be quite harsh sounding. They are metal dome tweeters and on axis like that will be harsh. See how you like it and you can always angle then across the dash.

Posted: Fri Feb 10, 2012 5:21 pm
by grant_day
They sound okay to me , just need to adjust a bit for slightly more bass, also I've noticed the whining noise, its only very quiet (not the missus) but its there. I've got a good earth on, power cables are separate from other cables etc ... Awww man :evil: