Hi, I've been trying to improve my GF-9000's bass output by fitting foam behind the woofers. This was meant to stop the bass 'flying out the back of the box' so it would come out of the front instead. These pictures are a bit later than I'd planned, but here they are...

Left side


A snug fit


Right side


Another snug fit


Both in!


The disappointing thing is, the foam has made practically no difference to the sound.

Oh well, I tried.

Oh wow you did a MUCH neater job than I did on my 777. Top craftsmanship there R.A.! I must say though that the foam I used on my 777 was a different shape. The stuff I used has the peaks and valleys, as seen here.



Which, I'm lead to believe are a lot of what absorbs the sound, if my science is any good, the flatter the surface is the more reflective to sound it is. But hey, the peaked stuff did absoloutely nothing in my RISING, so it's all moot.

I hope you enjoyed the experiment though. Always good to try, never know what you'll find out.

I'm getting Dyna-Mat this week and will post my findings in this thread to further our experiments. My GF-9000 is still yet to turn up, but I'll definitely try some stuff out on her. The ebay photos were inconclusive as to what colour woofers are in her so I'll see what happens.



Rock On.

quote:

Originally posted by Gluecifer:
Oh wow you did a MUCH neater job than I did on my 777. Top craftsmanship there R.A.!

Thanks Rick , I wasn't cutting any corners (excuse the pun ) on this one.

quote:

I must say though that the foam I used on my 777 was a different shape. The stuff I used has the peaks and valleys, as seen here.

Which, I'm lead to believe are a lot of what absorbs the sound, if my science is any good, the flatter the surface is the more reflective to sound it is.

Which means my flat foam should have been more effective.

quote:

I hope you enjoyed the experiment though. Always good to try, never know what you'll find out.

I had to try it out, otherwise I'd have never known.

quote:

I'm getting Dyna-Mat this week and will post my findings in this thread to further our experiments. My GF-9000 is still yet to turn up, but I'll definitely try some stuff out on her. The ebay photos were inconclusive as to what colour woofers are in her so I'll see what happens.

Good luck with your project, Rick. If dynamat makes a big difference to the sound, I think I'll be copying you! But as you say, you don't know what colour the woofers are. If they're black, you might not need to touch anything.

Thanks for the reply.

more amplifier power and better speakers would go alot farther than foam on improving sound quality ,i don't know how many watts the gf 9000 is but if you want better sound i would look at the speakers themselves first then go thru the process of elimination replacing the woofers with higher quality units then if that does not work you probobly dont have enough power so then i would look at more efficient speakers that make better use of the available power.

Don't you have to find woofers with the correct ohms though?

yes you need to match the impedence ,the only thing you need to look for is the sensetivity rating a rating of 90db's or higher will get you more sound with less power as where a speaker with a rating of 89db's or lower will give you less output with the same power the sensetivity rating tells you how efficiently the speaker uses power ,most light wieght speakers have a high rating and are very flimsy as where the ones with a lower rating are more robust and handle power much better but you need plenty of power to throw at them.