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Old 01-12-2005, 08:38 PM   #1 (permalink)
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you guys think i could fit a pair of 6x9 speakers in the rear if so how?
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Old 01-12-2005, 08:39 PM   #2 (permalink)
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Yea you can.. as far as I know.. just cut away... dremal.. or just a knife... maybe the guys in the "audio" forum would know...

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Old 01-12-2005, 08:46 PM   #3 (permalink)
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dude i swear i was like where did my post go? hahah

but yeah what to cut?
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Old 01-13-2005, 02:52 PM   #4 (permalink)
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well, interesting you ask. On ym mustang, I put on there a set of 6*9 in the back, I had to cut to make them fit, but I was quite please with the outcome.
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Umnitza now provides a mechanic to install all parts ordered right in the box! It's their new "Total customer service program" that will eliminate all the haters and keep incompetents from breaking shit and blaming the vendor! When you are all set simply call INS and they will pick him up free of charge.
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Old 01-17-2005, 01:25 PM   #5 (permalink)
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yeah i was thinking about taking apart a 6x9 speaker box and put my speakers in it.. then with the 6x9's mounted to the piece of board from the box mount the board on the metal trim and there you go!! but anyone have any doubts before i start cutting metal?
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Old 01-17-2005, 02:33 PM   #6 (permalink)
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this is going to sound annoying to you, but just make sure you know what you're doing before you cut metal bcs there is no going back.

Sorry if thiss ounds arsh, but sicne I have done it before, not on my BMW, it would just suck if you did it wrong or the hole ended up being too big or some stuff like that.
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Umnitza now provides a mechanic to install all parts ordered right in the box! It's their new "Total customer service program" that will eliminate all the haters and keep incompetents from breaking shit and blaming the vendor! When you are all set simply call INS and they will pick him up free of charge.
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Old 01-17-2005, 10:21 PM   #7 (permalink)
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thanks but i knew that why do you think im asking this question?
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Old 01-23-2005, 11:47 PM   #8 (permalink)
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Originally posted by B3M2W5i@Jan 17 2005, 09:21 PM
thanks but i knew that why do you think im asking this question?
[snapback]273787[/snapback]
yeah i did it in my 1991 bmw 318is put jbl 6x9 3ways in the back they sound great, got out the grinder and chomped away. just make sure to pull the carpet back and vacume up after. also put somthing in the trunk to protect the trunk carpet too cause it can burn easy.
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Old 01-23-2005, 11:59 PM   #9 (permalink)
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before you cut any metal make an adaptor out of wood first and see how it fits. Screw the speakers into the adaptor and glue the adaptors into the rear location from the trunk. If you like the sound then you're golden and you didn't have to cut anymetal. I know of someone who did this and it looks and sounds good. This way you keep your stock look in the rear, well from the cabin perspective, and all you had to to do was remove the factory speaker box and put in a 6x9 with a custom adaptor. good luck
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Old 01-25-2005, 10:41 PM   #10 (permalink)
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Quote:
Originally posted by YoungExec728@Jan 23 2005, 11:59 PM
before you cut any metal make an adaptor out of wood first and see how it fits. Screw the speakers into the adaptor and glue the adaptors into the rear location from the trunk. If you like the sound then you're golden and you didn't have to cut anymetal. I know of someone who did this and it looks and sounds good. This way you keep your stock look in the rear, well from the cabin perspective, and all you had to to do was remove the factory speaker box and put in a 6x9 with a custom adaptor. good luck
[snapback]277922[/snapback]
This is actually a good idea for anyone not wanting to cut their car. I have done car audio for 18 years now and this works rather well. The main thing to remember is to seal the front side of the speakers from the back side. Anything compromise will limit (or get rid of) any bass response. It could actually sound worse. Make sure your wood pattern is sealed against the rear deck well.

A 6x9" speaker doesnt need a 6x9" hole to fire through. A 5.25" hole is plenty to get all the sound out of that speaker. Just position the tweeter assembly in the center of the hole, and as much of the woofer part as possible. My 525 had a rear factory tweeter that could be removed as well.

Quote:
yeah i was thinking about taking apart a 6x9 speaker box and put my speakers in it.. then with the 6x9's mounted to the piece of board from the box mount the board on the metal trim and there you go!! but anyone have any doubts before i start cutting metal?
The 6x9" speakers are designed to work with the 30-40 cubic feet in your trunk as the enclosure. Limiting them to a small box (6x9" boxes are usually for trucks and are less than 1 cu.ft.) will make them sound REAL tinny. Make sure the rear of the speaker protrudes into the trunk for optimum performance. Oh yeah, an amplifier works REALLY well on 6x9".

A side note: I have a 1972 chevelle that I removed my 3-12" Image Dynamics from and installed 3 pairs (yes 6) of 6x9" speakers in the rear deck and I dont miss any bass at all. They are running off an XTR400 Orion amp. I have another one of the same amps running 4 - 5.25" speaker in front fiberglass kickpanels.

The 525 has 2 - 11" Focal subs with Infinity Kappa 5.25" components in the factory locations.
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Old 01-26-2005, 09:11 AM   #11 (permalink)
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but its a 4 inch hole in the rear and the magnet of the 6x9 speakers barely fit through
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Old 01-26-2005, 04:11 PM   #12 (permalink)
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The 6x9" will mount from the bottom, sorry about the confusion.
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Old 01-26-2005, 04:36 PM   #13 (permalink)
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Quote:
Originally posted by da_bull@Jan 25 2005, 09:41 PM
The 6x9" speakers are designed to work with the 30-40 cubic feet in your trunk as the enclosure. Limiting them to a small box (6x9" boxes are usually for trucks and are less than 1 cu.ft.) will make them sound REAL tinny. Make sure the rear of the speaker protrudes into the trunk for optimum performance.
I'm probably not as knowledgeable as you in the car audio field, and want to know more about this. I'm going to upgrade my speakers (in an older Volvo, not BMW) to a pair of Alpine 6x9s on the rear deck. I would rather not do any cutting, and was planning to simply use speaker boxes from Crutchfield. Is it really that much of a difference in audio quality? I'm going to be running those speakers, and Alpine 12" Type-R sub, off of an Audiobahn 600w 4-channel amp. Would you reccomend not using the speaker boxes?

On a related note: I haven't yet bought my sub, and am deciding whether to buy a 12" in a sealed, no-name (or Q-logic, etc) box, or the same sub in the Alpine-designed enclosure (bandpass). I'm not asking about the difference between sealed and bandpass, but rather whether it would be good to go with something engineered by Alpine. Do you have any insights you could share?
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Old 01-26-2005, 09:51 PM   #14 (permalink)
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Quote:
I'm probably not as knowledgeable as you in the car audio field, and want to know more about this. I'm going to upgrade my speakers (in an older Volvo, not BMW) to a pair of Alpine 6x9s on the rear deck. I would rather not do any cutting, and was planning to simply use speaker boxes from Crutchfield. Is it really that much of a difference in audio quality? I'm going to be running those speakers, and Alpine 12" Type-R sub, off of an Audiobahn 600w 4-channel amp. Would you reccomend not using the speaker boxes?
If you are using a subwoofer, you could get by with putting them in the boxes. Your 12" will do the bass part and your 6x9"s will do the midrange. They probably still wont perform as well as they could, BUT putting them in the same airspace as your sub may shorten the life of them, because your sub moves a whole lot more air than the 6x9"s ever could, and will beat them to death.

I know my 525i is really quiet going down the road and they do that on purpose, in blocking out unwanted low frequency road noise while you are traveling (thats why we all paid the higher price). On the down side of that, subs reproduce low frequencies that we want to listen to ghead .

On my car, I put my 2-11"ers in a bandpass box and used the factory "ski hole" for the vent and sealed the rest from the trunk. This way all the sound comes into the inside of the car and I retain the quiet ride, and the trunk doesnt rattle. Im not sure if your Volvo has an option like this, but it worked for me. If you are going to do a subwoofer, dont worry about fitting/buying 6x9"s, just get a GOOD pair of whatever your car takes, (i think most 80s early 90s volvos were 4", present day are 5.25???) and you will probably have a better performance than if you tried to squeeze the 6x9"s in the wrong enclosure.

Quote:
On a related note: I haven't yet bought my sub, and am deciding whether to buy a 12" in a sealed, no-name (or Q-logic, etc) box, or the same sub in the Alpine-designed enclosure (bandpass). I'm not asking about the difference between sealed and bandpass, but rather whether it would be good to go with something engineered by Alpine. Do you have any insights you could share?
These companies do a lot of R&D to make their respective woofers work with their boxes but its not necessary. Any enclosure (as long as its' specs match what the manufacturer recommends) will work fine, the wood/plexiglass/fiberglass enclosures make VERY little difference, everything else remaining the same.

:whew fingers hurt Imma quit writing for now

Any other questions, gimme a shout...
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Old 01-26-2005, 10:20 PM   #15 (permalink)
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Quote:
Originally posted by da_bull@Jan 26 2005, 08:51 PM

On my car, I put my 2-11"ers in a bandpass box and used the factory "ski hole" for the vent and sealed the rest from the trunk. This way all the sound comes into the inside of the car and I retain the quiet ride, and the trunk doesnt rattle. Im not sure if your Volvo has an option like this, but it worked for me.
Yes, I have a ski hole in the back seat (about 8"x4") which I was thinking of leaving open. I don't have to worry that much about not hearing the bass, though, because Volvo wasn't overly worried about blocking out road noise.

Quote:
If you are going to do a subwoofer, dont worry about fitting/buying 6x9"s, just get a GOOD pair of whatever your car takes, (i think most 80s early 90s volvos were 4", present day are 5.25???) and you will probably have a better performance than if you tried to squeeze the 6x9"s in the wrong enclosure.
My car is a 1989 Volvo 240 GL sedan. This is the lower-end series, and wasn't designed with music in mind. The speaker arrangement is simply this: a pair of 4" speakers in the front door panels, very high up on the doors. This causes some annoyance in terms of latency - the sound arrives at different times. There are no speakers in the back. Although it's better to keep the soundstage up front, as long as i have good quality, full-range (not tinny) music, i'm not too concerned with that. I can fit two 6x9 enclosures on the rear deck, which I thought was a good solution. At the moment, I have a pair of cheap Pioneer 4" speakers (better than stock, anyway) up front, which I'll eventually upgrade to a set of Alpine S-series speakers, probably 4", 5 1/2" if I can get them to fit. Does that sound like a good plan to you?

Quote:
These companies do a lot of R&D to make their respective woofers work with their boxes but its not necessary. Any enclosure (as long as its' specs match what the manufacturer recommends) will work fine, the wood/plexiglass/fiberglass enclosures make VERY little difference, everything else remaining the same.
Because the difference in cost between the two is negligible, I think I'll go with Alpine's enclosure, simply because I know that it's matched with the sub I'm going to be using.

Thanks for your help!
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