A little bit ago my dad found like 3 skid fulls of old Alumapro speakers which i believe are 15" and are the old style Alumapro which had the true aluminum cone but I dont know what the modern ones have. Anyways, have any of you guys ever heard theese speakers before? Theese must be pretty old but they supposedly have lots of juice. Can anyone help me out here with some info and if they would work in a car?

 

Anyone? They have no model name to them, there just Alumapro's according to my dad who says there more than 5 years old. Its got a gold spun aluminum cone and are pretty massive. I've got about 100 of them lying around though so I'd like to use them if possible.

 

How did you randomly find 100 15" speakers just sitting around without model numbers?

 

well heres what happened......my dad owns a general storage warehouse which is very large (like 1/3 mile or something) but these guys where renting a shop area from my dad and they where the ones making bullfrog speakers which Im not sure but they were just the casings for these speakers I think. Anyways the went out of buisness so my dad was left with 100 of these speaker and speaker frames instead of the rent.

Thats were the confusion comes in because my dad things theese speakers are around 5 years old but they look exactly like this one

 

home speakers??

 

They use them for all sorts of things but mainly for p.a systems I believe. I know they shipped out a couple of the speakers to B.B King a while ago so they should be decent.

 

how much you want for one of them? i'll be glad to test it out and see what happens if the price is right send me an email if you're interested.

 

if there pro audio speakers there probably worth a pretty peny, even cheap Pro audio stuff is with proably 200 each per driver


and I think JBL has one thats like..... ughh 5 grand or something

 

those prices make sense for BRAND NEW EQUIPMENT WITH LABELS FROM AN AUTHORIZED DEALER. this is much different - i was thinking $20 +shipping.

 

Nah I would understand why you would think $20 but were going to wait since theese are probably close to the last of these in the United Stated. My dads been selling one every once in a while for $90 each shipped. Oh by the way, my brother stuck one in his bass amp and it sounds pretty good but thats not saying much.

 

well there is that whole..... you didnt really pay for them thing

 

Well technically we did because it was a trade and thats all they could give us for there $2000 bill since they went out of buisness. I think that was plenty fair.

 

either way.....as long as you are
happy with your price

 

hmmm, this is interesting.....

http://www.usspeaker.com/Alumapro-15-1.htm

Yossarian posted the exact same picture that is on this website with all the specs. Apparently they were worth 100 bucks, but were on sale for 50 bucks until they sold out....

 

well I'll be a monkeys uncle, I did a google search and when I found these pics I tried to find the site they were on andfor some reason they didnt show up (probably cause they were discontinued). So according to this site and if these are the same speakers then there Dayton Alumapro? They dont say Dayton on them anywhere and the site says the ones they were selling had a silver cone so that confuses me even more. I'm taking a while guess and saying that the ones in that pic are different from the ones they were selling because all the people that have bought them from us use them for p.a/guitar amps usually. Anyways I dont think 90 shipped is off still considering these things were going for 50 plus shipping which has to be a hell of a lot considering the weight, plus they sold out (rare at least in the future). Thanks for the help sesand.

 

The speakers I found on the website could be used for guitar/pa systems with a frequency response into the 4 kHz range. Also guitar/pa/home theater amps typically power 8 ohm speakers, whereas car audio amps tend to be designed for 4 ohm speakers.
the site you found them on probably had them custom colored - if you go to the alumapro website, they will customize any speaker they sell and even put your logo on the dust cap.


100 speakers*$90= $9000
sounds like you got a pretty good deal for a $2000 debt.

 

Nah its more like this 50 sellable speakers at $70 after shipping (guess) comes to 3500 and then you take into account that it going to take us years and years to sell these speakers instead of having $2000 in our pockets right now. I overestimated how many speakers there actually were because many were just the frames but it turns out there are 70 or less and even then many arent in good enough condition to sell. so like 50-60 speakers tops.

 

Its cool. I didn't mean to give you a hard time on it.

 

Nah your not, I just didnt want to come off as an a-hole. So what do you think the chances are these working in my camaro? If you think it would be decent then what would you recommend me using to power the beast?

 

I would run two of them in parallel to get a 4 ohm load - just feed them their recommended RMS power from a quality amp. Car amps don't usually list power ratings at 8 ohms (if you're just going to run one), but an estimate would be somewhere between 1/2 and 2/3 of the 4 ohm power rating. If you're looking for advice on finding a particular amp, there is plenty of that floating around the thirdgen forum...
Even still you will be taking a chance since there is no telling how they will sound in the car audio environment, or what their frequency rolloff looks like in the typical sub bass range. Afterall, these speakers are designed for a different application.
Its your choice.

 

You'd probably be okay using them in your car. Alumapro carries a pretty good name and they do (used to do?) car audio applications as well. There was a guy on here a while back who used to own an Alumapro and had only good things to say about it (granted it was sold specifically for car audio). Still Cerwin Vega used to use the same drivers for their home and car audio gear and only changed the resistance of the voice coils.

Like sesand says, I'd suggest wiring two of them in parallel to achieve a 4 ohm load and then make sur eyou're powering them with an adequate sub. Their sensitivity is high (more than 92dB) so you could even stand to run less than 400w to them if you bought a decent amp; you'd still get some great volume out of them.

Of course, this all assumes that it is the same one as in the pic. You should take a multi-meter to that thing to see if it's an 8 ohm sub.

Have you ever heard one outside of your borther's bass?

 

Any update on this?

 

Sorry there is no update on this, my cars just about to get out of paint (magnetic red) and I have a black interior waiting so my top priority right now is getting the glass in at least. It will be a month or so before I start worrying about the sound system. ]

I do have a decision to make though, is there any practical way to mount two of these in my car? Could you give me an example of what I would need to power them and how much the things costs generally. See, I wanted to make a sub enclosure out of fiberglass, the type that isn't a square and uses fleece covering to make any shape you want (sorry I cant explain better). Anyways doing that with one wouldnt work unless I just did one large valcanoe shape.

 

Progress is progress I'm a big fan of red cars, myself!

As far as powering the subs, you need an amp that puts out around 400W into 4 ohms (if you wire two of them in parallel). So something like this should be fine:
http://www.cardomain.com/item/PHOX4001
Although there have been some horror stories on this particular series of amps from PG - shouldn't be a problem since you would be getting a one year warranty.

OR try this
http://www.cardomain.com/item/PHOR1501
I know it's rated at 500W RMS, but you can always buy an amp that will give you more power than you need, and just set the gain so you never reach 500W, and only give your speakers what they can handle.

You can always under power them if you don't want to pay that much for an amp, since they appear to have a high sensitivity.

You're looking at about $50-70 for wiring, and you can just buy a kit. I don't recommend smaller than 4 guage, especially if you plan to add stuff later. Are you planning on adding other speakers, or just the subs?

It will be sweet if you can custom fiberglass a box and amp rack. Where are you going to put it?

 

Well Im totally clueless still, the one I saw had 3 in it like 12's on the side and 14 in the middle and look awsome. I was thinking I would just buy two 12's and then make a place for the amp inbetween. Rather just put a single Alumapro in since the things 15" and then just hide the amp. I dont know, any ideas?

 

If you're going to fiberglass an enclosure, you should be able to put two of them in there no problem.
If you only use one, you're going to pay more to get an amp that puts out 200W RMS at 8 ohms (and you will probably have to contact companies individually to find out what the amp is rated at 8 ohms).

 

I dont see how fitting two 15"s is that easy, you do understand the style I am talking about, right? Now I just got to figure out how they do the whole volume/backpressure thing with such an odd shape, maybe they just dont care about it.

 

I mis-spoke when I said it would be no problem. What I meant was it will be easier if you're fiberglassing due to the awkward shape of the well. And, with the way the well is shaped, if you can fit one 15" sub on one side, then you can fit another on the other side. The difficult part is taking the time to do a nice job with the fiberglass.
From what I can tell, the shape of the box doesn't make much of a difference as long as it's the right volume per sub (have a divider between them). You run into trouble with perfectly square boxes, but your box will be far from square
I've seen a box with two Kicker 15's (or maybe they were 18's??), but I'll be d*mned if I can find it. The guy put water in the box to find its exact volume.

 

Found it - they were 18's
https://www.thirdgen.org/techbb2/sho...t=water+volume

 

Sorry I guess I wasn't being specific enough, I am thinking about doing fiberglass but the type that dont fit in the well as seen below. I think they just look rediculously nice especially when painted nice. Let me know if anyone has a problem using this pic, this isnt mine.

 

Or this.....

 

I don't think you will get enough volume in those boxes to properly load the subs (I haven't done any calculations, but it looks that way). Also, I'm not sure how they will sound - from what other people have said, boxes mounted on the hump seem to have more trouble with cancellation of frequencies.