I went ahead and designed some retrofits for a pair of Bazooka wakeboard tower speakers. The crossover took some time but came out decent in the end...

I posted this in advance discussion do to the crossover design. Ill post details about it later and answer any question.  There was a lot of work getting decent response...

Interested in your driver choice.  My wakeboard boat is without after they got stolen last year

So I went with Eminence 8" Beta coaxial drivers and the ASD1001 compression tweeter. I coated the woofers with "Wet Look" from Parts-Express to help with moisture. If I had to do it over again I would have chosen a different tweeter. It has a huge 12 db dip around 7K when ran through the Beta 8. Eminence's own driver measurements had dips like mine, Ill post them later. Anyway it made crossover design much tougher than it needed to be but those tweeters are only $24 each so I lived with it. If You look at the response I let it rise after 15K because I have a R/C eq circuit that altered the impedance enough already without getting more complex. It adds a little semblance to vocals but I think it will be ok outside on the boat. I think some of the higher end 8" coax drivers from the Italian manufacturers would be better but the price almost triples. These get pretty loud and clear and are pretty efficient...

Here is the response of both drivers, combined and unfiltered.

Here is just the tweeter on Axis.  Compare it to the Eminence measurements and had dips in tweeter response as I found really came through when mounted to the Beta 8.  Not good...

 

290-500--eminence-beta-8cx-specifications.pdf

290-525-eminence-asd1001s-specifications-44698.pdf

Once I was able to get the tweeter response tamed they combined pretty good.  I ended up with a 1st order filter centered around 3Khz with a Zobel network on the woofer and the tweeter ended  up with a 3rd order electrical centered around 3.5Khz with a R/C series equalizer circuit that started rolling off around 5Khz at 6db/octave.  If you look at the combined response in the first post it isn't too bad.  There isn't much below 100Hz as the enclosures aren't tuned much lower than that from Bazooka.  That is OK in the boat though, they are highpassed at 125Hz from the head unit.  Bass is handled by a pair of PSI Bassline 10s, they fill out the bottom nicely.  If I were going to build these again I would just use a piece of the schedule 40 PVC pipe I used for measurements with a solid end cap made of marine grade plywood.  I think the bass would be a little better and the the enclosure would probably end up fully stuffed with Dacron.  One thing I will say is these things are LOUD.  I didn't get a chance to accurately calculate 1w efficiency, but if driver data is accurate from the manufacturer the system should be about 93 db 1w/1m.  Not too shabby.  Easy load to drive, too.  The cool thing about using these kinds of drivers is they are really hard to blow with reasonable power.  My buddy is going to have about 200 watts driving each speaker, at full clipping I am not sure he will be able to reach thermal limits with normal music.  The Bazooka 8" coaxs only would last a weekend before one would melt down, I don't think he will have the same issue with these...

so 2nd weekend out on the boat with these.  They sound pretty good and have absolutely been bomb-proof.

Awesome!  Once my kids actually want to wakeboard I am gonig to build some as well.  Right now I surf a couple times a summer and that is about it.

I think you would be happy with something like this. The only downside is you need to cover them when not in use due to the fact that they can't take direct water like marine speakers. But marine speakers don't really sound that great for the most part so it is well worth the compromise.

 

On 8/14/2018 at 1:13 PM, ///M5 said:

Awesome!  Once my kids actually want to wakeboard I am gonig to build some as well.  Right now I surf a couple times a summer and that is about it.

I designed a bigger set using B&C 10 neo coaxs. It was a lot of work to get the crossover right with a low parts count but man, they actually sound really good. The went onto an MB B-52

I bought a 28’ Donzi a few months ago. I’m going to put a tower on it for a decent set of cans I’ll design. I think a 15” or 18” sub in the mid cabin too...

Sweet.  What motors?  

350 Mags. 01’ with 240 hrs on it. Not a scratch on the hull, trailer queen...

Awesome. Going to be a fun summer.

Yes it is. Just need to figure out what I’m going to put it in. Both cans I designed sounded really good, but I might go back to a higher end 8”. I’ll look and see what is available in March. I also need to look at the boats electrical, there are dual alts and 4 batteries, but the alts are roughly 90 amp i think. JS makes high output marine alts, I might look into those. You are normally at 4K RPM or higher for charging so not really sure about a lot of the car audio alts. I have some homework to do.

I think for sub I’m going to do a 12” in a standard 4th order vented alignment. I am thinking of pretty stout driver, either one of the zCONs or a PSI platform 4 or 5... I figure I could have around 3ft3 to play with... I still haven’t even turned on the stereo it came with yet... The components look like decent JL drivers...

An interesting experiment, I wish you good luck and look forward to the results!!

Edited February 16, 20214 yr by BrightLord

Spammer lol ^^^^^

on the flip side, just had a Bimini made and SeaDek put in, gonna be a good summer...