Component Speaker Questions

Soldato
Joined
19 Jan 2003
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Bristol, UK
I have just ordered some Infinity REF6510CS Components for upfront in the Mondeo.

I didn't want to spend much more than about £80-£100 and having heard these in a Mondeo they sounded much better than Alpine 171A (which I also listened to in a Mondeo). I bought these for £60 delivered from ebay, brand new, boxed etc.

My current speakers are pretty poor.

Upfront I have 2 x Sony 17cm somethings which I just bought as a stop gap and then never really got round to replacing them (until now).

In the rear are the two standard Ford speakers but they start distorting quite badly at a medium volume and are known to be rubbish.

I use adaptors with the Sony speakers as Ford speakers are weird size, 6x8/5x7 IIRC. I picked them up from Halfords and they have always seemed a little flimsy, should I make my own from MDF, will it improve sound at all?

Now I have three main questions:

Where is the best place to mount the tweeter, should I just play around with height and see how I prefer it?

Most Mondeo owners mount them on the inner wing mirror cowl but I have seen and heard these Infinity's with the tweeter mounted in the door around 1/2 way up, between the mid-range speaker and top of door. He said he found they sounded best there. I have seen some cars with the tweeter on the A pillar cowl too?

Secondly, what should I do regarding the rear speakers?

Thirdly, there are some settings on my headunit (Alpine 9851R) I don't quite follow. I guess they are the high pass and low pass filters but changing them doesn't seem to do a lot? Most of the current Alpines have similar interface so can somebody explain what these settings do and what are ideal/optimal settings?

Oh I also have a sub, it's a JBL unit, 290W RMS with a pretty well matched JBL amp which is 300W RMS in bridged config. Won't set the world on fire and I don't have it cranked right up, just add's a bit of depth to the music.

Oh, as a side not I found out why my radio reception is so poor, the connection between the aerial and aerial cable is badly corroded which means I will need to buy a new aerial, aerial base and cable. Hopefully these will be cheap from Ford :) Any idea on cost?

Thanks,

Chris
 
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I will go and take some screen shots of the menu options I cannot figure out :)

Maybe a small video if it's easier.

Post it up in a sec.
 
Alpine CDA-9851R

Any idea on what those settings are, filters? What should they be set to?
 
needmorespeed said:
they are treble and bass boost and the center frequency for the boost leave them at 0 :)
Ahh right, What should the centre frequency be for bass and treble?
 
Speakers arrived today,

Few more questions:

Speaker cable, suddenly realised I need some to go between the speakers and crossover. What cable would you recommend?

How come the cable coming off the tweeters is about 3 inches long.

Oh, and if you watch that video, when I am adjusting the bass that middle number (it's a 1) can be changed between 1-4. What does it do?
 
comp1.jpg


comp2.jpg


Took me bloody ages to do this, started about 9 this morning, then stopped to help our builder lift some VERY heavy steel RSJ's into place. I could only just about lift in using both arms so when one of my hand's got trapped underneath, it was quite painful. Somehow I managed to lift it off just using my left arm, must have been an adrenaline thing? Anyway, I plodded back on with the car with my now crippled hand.

I made one small mistake, the tweeters do not sit in exactly the same place as each other as the door cards differ slightly due to the electric window switches (there are 4 on the drivers door).

If I mounted the tweeters lower they could have gone in the same place, however they sounded best where they are fitted now- so maybe not a mistake after all and just me being fussy with aesthetics.

The speakers sound excellent, I haven't been out driving yet so cannot tell you what they are like other than when stationary on my drive.

I used some of my company's home cinema cable I had left over from an install the other week as I was only doing short runs all inside each door. Worked fine as I expected.

What do you think?
 
agw_01 said:
Did you build MDF mounts?
Yes but my woodwork skills are the lose so they got binned. My friend is a carpenter so I am going to do some drawings and get him to knock me up some in exchange for a few pints.
 
I am really pleased with mine, they sounded a bit too bright so i knocked the treble to minus 1 via the headunit.

Other than that they are excellent. I got mine for £60 delivered off of ebay. Brand new etc.
 
After further listening the tweeter in the drivers door is distorting, even at low volumes. I think it's only at certain frequencies though (resonating?) as it's not on all songs.

Is there an easy way to diagnose the source of the fault.

I was just going to do it methodically, first make sure it's not the source- My mp3 cd's, then check the wiring is good and correct, swap the tweeters over, swap the crossovers over.

That should locate the fault or faulty component.
 
I also have a second problem, perhaps the two are related...?

Sometimes, when powering up the HU for the first time. i.e. When I get in the car the drivers side speaker is very very low volume. Barely audible.

I have confirmed this as when it happened I switched the balance to all over to the right and couldn't really hear anything.

Turning the volume up a fair bit makes it suddenly kick into life.

Any ideas? Perhaps the crossover is faulty?

I haven't had the time to have a look at it as I have been working flat out and leaving my tools at the job so haven't been physically able to take the door apart anyway.

The passenger side works 100% excellent all of the time!

P.S. I am pretty sure it's not the HU at fault as this never happened with the old speakers. One thing I havnt tried is fading it to the rear only (currently everything is coming out the front) to see if the rear drivers side speaker is effected the same way as the front- I will give that a go as I guess it will single out the HU. Doesn't have 4 seperate amps does it?
 
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After lots of fiddling and testing this morning I can conclude that the source CD was at fault for the distorting tweeter and I am quite sure that a loose FORD TO ISO adaptor connector was causing the intermittent working right speaker problem.
 
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