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john 33_16v
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PostPosted: Mon Jun 21, 2010 3:17 pm    Post subject: Reply with quote

Al,

When you move the regulator motor probably worth trying to keep it away from the speaker magnet as much as poss or even think up a clever sheild. My extremely limited physics knowledge makes me think you could run into problems with the regulator motor getting demagnetized or something, but I could be completely wrong Rolling Eyes

John
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BigAl
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PostPosted: Mon Jun 21, 2010 9:00 pm    Post subject: Reply with quote

ok Smile
I think i will just angle grind off the top part of it, i should have taken a pic of it, haven't decided yet.
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BigAl
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PostPosted: Tue Jun 22, 2010 2:05 am    Post subject: Reply with quote

I am not happy with the soundstage, so i am going to try the tweeters on the dash and in the a pillers down by the windscreen. I tried to stick as close to oem as possible, you never know, moving the tweeters may have no change to the sound stage.
The harshness has died down a bit, it maybe that the speakers need a while to bed in, but it has been suggested that it is caused by lack of sound deadening in the door.
Once i get my mdf blanking plates made and sound deadend the doors, i will be able to tell.
So its time to move the crossovers inside the car and re-wire again Smile
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johnboy
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PostPosted: Tue Jun 22, 2010 7:39 pm    Post subject: Reply with quote

Shocked ive just read all this are you trying to make your car go slower and use more petrol Rolling Eyes ive done alot of what your trying to do and as ian had said,when taking all this out the car went much better!!! but each to there own Wink
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BigAl
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PostPosted: Wed Jun 23, 2010 1:54 am    Post subject: Reply with quote

I tried the tweeters in different places, the sound stage is raised and widened and the radio sounds really good, esp classical and the speaker location disappears. The cd however makes the right tweeters location apparent Sad

The only extra weight in my car is the plywood, weighs hardly anything and the sub and 2 amps. Head unit replaces original which was already there, speakers replace ones that were already there, plus I’ve removed the rear speakers.
If and when I track the car, I’ll just remove the sub Smile
Fed up with the crap sound from stock speakers, about time i did something about it Smile
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BigAl
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PostPosted: Fri Jun 25, 2010 3:41 pm    Post subject: Reply with quote

Finally decided to mount the tweeters on the dash as it sounded the best, so i now need some replacement door cards, although i might try 1 more thing and that is to cut out larger holes on the door cards so the card can slot over the rings and attach the rings to the metal of the door as im not happy with the flexing of the card.

Here you can see the top of the regulator.



I might cut off the top lug, as it is not doing anything anymore and when i moved the regulator the cable looked a bit too kinked for me, not quite sure
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BigAl
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PostPosted: Sun Jun 27, 2010 8:37 pm    Post subject: Reply with quote

I came across this thread, an interesting read, post 161 especially.
http://www.diymobileaudio.com/forum/diy-mobile-audio-sq-forum/72891-anyone-tried-using-one-tweeter-7.html

I tried adding a tweeter in the middle, wired from + left and + right tweeter outputs from the crossovers to give a center channel but for some reason it was running full range and I don’t have a spare crossover and didn't want to damage it so I tried both the tweeters near the middle.
I am now happy, when listening to classical on the radio I can locate the different instruments and the tweeter location now disappears for all sources.

I know it is an unconventional positioning to have the tweeters but I was not getting the results with the normal way, either a limit on my cheap entry level components and or the cabin shape of my alfa 33.
Here is a bad pic


I am a bit concerned about the heat in the winter, but it will only be on to demist the windscreen
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Oggie
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PostPosted: Mon Jun 28, 2010 5:22 pm    Post subject: Reply with quote

you should wire it from positive of both Left and Right channels to achive a center speaker sound but you may have to reduce the output signal after mixing the positives together unless you have tweeters with a built in resistor , then take the single positive to the 1st tweeter then the neg from the first to the positive of the 2nd then neg from the ground to the negative of the signal scorce. It doesn't have to be to both channels of the "mixed" negative source just to one will do as its just a ground.
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BigAl
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PostPosted: Mon Jun 28, 2010 8:13 pm    Post subject: Reply with quote

Oggie wrote:
you should wire it from positive of both Left and Right channels to achive a center speaker sound

I did Sad i took the + outputs from each crossover, the tweeters have no resistor as they are fed from the crossover.
Although it worked it wasn't filtered, thats the only way to get the correct center channel. By taking both negatives you get the rear channel. Thats if i remember this, its been a while.
Before i bought my first AV amp i used to have a pair of mission 760i's wired up via the B speaker terminals to guve the surround effects, on my Sony TA-F442E amp along with my Mission 734's
I made a switch witha dpdt so i could swicth from normal to surround lol
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black_mofo_withmuscle
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Joined: 14 Jun 2010
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PostPosted: Mon Jun 28, 2010 8:44 pm    Post subject: Reply with quote

I got this in my parcel shelf,

FUMPS MATE!!!

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johnboy
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PostPosted: Mon Jun 28, 2010 8:49 pm    Post subject: Reply with quote

Laughing Laughing Laughing Laughing
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BigAl
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PostPosted: Mon Jun 28, 2010 10:06 pm    Post subject: Reply with quote

I am liking these speaker covers.

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Oggie
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PostPosted: Tue Jun 29, 2010 3:22 pm    Post subject: Reply with quote

Al , I have a pair of the Alpine speakers for sale to which you like the covers of, they have been sat in my shed for a year or two now but I had them out of the shed at the weekend to photo them for ebay.
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BigAl
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PostPosted: Tue Jun 29, 2010 4:12 pm    Post subject: Reply with quote

Alpine Type-S SPS-171 by any chance? What a coincidence lol Smile
I will eventually upgrade to 6.5”
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BigAl
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PostPosted: Wed Jun 30, 2010 2:54 pm    Post subject: Reply with quote

I got the dremel out

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BigAl
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PostPosted: Sat Jul 03, 2010 11:39 am    Post subject: Reply with quote

I got the speaker covers, they are 10mm deep and make the overall look too high, so i will remove an mdf rind once i have dremmeled off the top lug for the regulator or moved it.
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BigAl
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PostPosted: Thu Jul 08, 2010 9:42 am    Post subject: Reply with quote

I have been trying to figure out a way to secure the leather covered hardboard.
I was thinking of using Velcro, but that won’t pull together enough to give a flush fit.
I also thought that screws through the leather would spoil the look and look nasty, so I thought of using magnets
Buy Circular Disc Magnets Online
EP310 15mm dia x 2mmA N42 - NiCuNi plated 1.9kg Pack of 20 Magnets.
I can countersink 2mm into the 60mm blocks and if the magnets are not strong enough I can double them up and countersink to 4mm. The magnets will be glued in an I can glue some 1mm metal plates on the underside of the hardboard
The magnetic field isn’t strong enough to affect the amps.


Q can you think of any other way?
Q what do you think of using magnets
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BigAl
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PostPosted: Wed Jul 14, 2010 5:06 pm    Post subject: Reply with quote

I got my mdf blanking plates today.





My mate forgot to cut the 60mm blocks for the false floor and should have them done for the weekend. Once there done I can make a new template, from the old one, to make the false floor, get that cut from my hardboard and then get it covered.

I need some help deciding on the finish.
I was thinking the floor could be black leather, PVC or vinyl and the sub could be grey alcantara with the Alfa Romeo logo embroidered on the top.

I will not do anything today as it is windy and is trying to rain Sad
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JeremyC
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PostPosted: Wed Jul 14, 2010 6:11 pm    Post subject: Reply with quote

I wish we'd swapped demister grilles before you attacked your nice flat one with a dremmel!
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BigAl
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PostPosted: Wed Jul 14, 2010 6:53 pm    Post subject: Reply with quote

Lol, mine was not flat to start, i guess they get soo hot they bend, I had to straighten mine, its still not perfect though Smile
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Ben_nz
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PostPosted: Wed Aug 04, 2010 9:47 am    Post subject: Reply with quote

BigAl wrote:
I got my mdf blanking plates today.


Flippen 'eck! Don't people normally just stick sound deadening mat over these holes?
Also, I'm sure I posted in one of your previous car audio threads about the window motors getting in the way of 6.5" speakers in the front centre of the doors. My solution of standoffs was uglier but faster and less drastic:
http://www.axys.co.nz/ben/alfa33/33profile/ALLDIALS.JPG
It also means I can't anchor the speaker to anything but the door card.
I haven't bothered to upgrade the power supply to my head unit so the unit cuts out if the volume's turned way up. I guess the 33's just not designed to rock! Wink
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BigAl
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PostPosted: Sun Aug 08, 2010 7:52 pm    Post subject: Reply with quote

Yes some people do for the smaller holes, but i want to do a thorough job and got all the small bits done aswell Smile

I saw your post and replied to it but you never replied Sad

I plan on cutting the door cards so i can slide it over the mdf rings, as i too dont like the idea of attaching the speakers to the door cards.

I get no dimming of head unit and no cutting out, i did get dimming before i set my amp gains correctly. I don't have it loud as the SQ gets harsh from not sealing the doors yet, so the cone moves too freely.
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BigAl
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PostPosted: Sun Aug 08, 2010 7:57 pm    Post subject: Reply with quote

finally got some of my blocks, so i made my template for the hardboard top


Later today the dremel will come out to cut the hardboard to shape, that should be fun Smile
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BigAl
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PostPosted: Sun Aug 08, 2010 8:02 pm    Post subject: Reply with quote

I checked out a foam place for backing for the boot floor, very nice lady gave me a contact, as I said I want to upholster the door cards with grey alcantera to match the seats and wanted stitching in it.

I NEED HELP!!
What / how should I cover the sub box?
I was thinking of rounding the edges and getting alcantara cut slightly bigger than the dimensions and then stitched together, with baseball type of stitching, I could either have the stitching on the outside or turn it inside out. I still plan on having a 10 inch Alfa Romeo emblem embroidered into the alcantera on the top face of the sub, or maybe the JL Audio emblem.

Suggestions please
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BigAl
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PostPosted: Sun Aug 08, 2010 8:03 pm    Post subject: Reply with quote

O.K, so first I cut out the hardboard, measured where the amps and sub are going to be and cut out the holes for them.


here you can see where I will place the wood blocks, the sub ones have a 12mm corner cut out, all bar the sub ones will be glued in place, you can see round holes in the top of the blocks, they are for the magnets and 1mm metal strips will be glued onto the underside of the hardboard.


Here is the underside with the sub wood blocks screwed in place


Here is the false top in place, I think I made a couple of rooky mistakes, this is my first install after all. I cut the holes for the amps but didn't take into account that the templates I used are for the base of the amps, not the top. The component amp needs 13.5mm each side to be added but I think I will leave it otherwise heat dispersion might not be as good. On the sub amp 10-12mm could be added on the left side. I say could on both because I plan on having hardboard inner sides to the cut outs where the amps are, I will have to decide how I’m going to do it. I also need to raise the component amp to make the top flush.


Here you can see the sub pushed in with a tight fit, this is all just a first mock-up, I plan on cutting the hardboard again, using this one as a template, there are 2 places I’m not happy with. I say this but it might not me necessary as I need to shave of a mm or two around the edge for the covering material to be able to fit and on the sub cut out, which will be larger as the sub will be covered and the hardboard.

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