Poly-Fill brings my SonoSub up from the grave

Ron-P

An update on my boomy sonosub and the 10db peak at 40Hz.

I started out with about 1.5lbs of Poly-Fill in my 177L Sub. The sub was less than pleasing. On my way home I stopped by Walmart and picked up an additional 5lbs, opened up the sub, stuffed it, sealed it and placed it back ontop of my slate in the corner.

Let me say that $10.00 in Poly-Fill turned my $350 sonosub into a $5,000 beast. I have never FELT such powerful bass. Extremely tight, clean with a very solid impact. I almost hit the ceiling jumping for joy. Yeah, I was doing the happy dance. This thing is AWESOME. I ran the LFE Sweep via AVIA and the 10db peak between 40-45Hz is gone. I have a very flat response across the board. A 2db peak at around 60Hz and that is it.

This thing, now, pounds my old Velo into dust. I had no idea bass could feel this good, so tight, so clean, so hard. I am amazed, its like an entirely new sub and all for $10.


Peace Out~:D

wangotango68

is the happy dance like the pee pee dance?


scott:D

Aaron

Sweet Ron! So what's your low end response???

Aaron

scottvamp

Good job Ron, enjoy.
What gets me is the poly-fill tricks the speaker into thinking that the enclosure is larger than it is. Your encloser looked pretty large already. Glad you figured it out though.

mantis

do you have finished pic's of the sub??
I glad your happy with it.

Ron-P

is the happy dance like the pee pee dance?

Yeah, jumping up and down uncontrolably. Almost spilled my beer....oh the horror.

Sweet Ron! So what's your low end response???

Aaron, I'll let you know. Now that I have it right, I want to spend some quality calibration time with it and then I can get some accurate numbers.

do you have finished pic's of the sub??

I'll post some finished pics this weekend.

The bass is simply amazing. Watching T2 last night was awesome. I cannot recommend enough that building these things is the way to go.


Peace Out~:D

hoosier21

I have taken the plunge, two 12" Shiva's on order, now to Home Depot I go to get some MDF.

Ron-P

Well, break it down son, what are
your plans? Size, ported/sealed,
twins or 2-12s in one. Tell me! I
want to build another one already.


Peace Out~:D

juice21

so ron, when you starting up RPmonstersubs inc. ???:D

glad to hear you're happy with your new sub. i would love to try building one myself someday...

hoosier21

What I plan to do is build two "Powered subwoofer speaker stands" I will use the Adire Audio Sealed 54 liter plans, with height adjustments to make it more like the 88.5 liter , I want a taller profile, like 24-26" tall and keep the 15" square footprint of the 54L design, I plan on adding a bottom "plate" with spikes. Looking for deep tight bass.

I have an NAD 2700thx amplifier and Paradigm X-30 crossover to drive these.

I plan on feeding the L and R channel to the X-30, pass the bass to the NAD hooked up to the PSSS's and the highs go to my Acurus amp hooked up to a pair of LSi9's (not bought them YET)

I realize this is a powered "bass section" and not a true subwoofer set-up, but it will kick the snot out of a commercial built powered tower.

This will do till I build an Adire Tempest 15" + 15" Passive DIY LFE ground shaker.

Ron-P

so ron, when you starting up RPmonstersubs inc. ???

Good one!

Excellent Hoosier. Keep us on the up-n-up. Very cool idea. Make sure you supply pics as you move along.


Peace Out~:D

madmax

Good work Ron!
I'm glad you found the problem. I'm confused about why that worked though. The polyfil should have just spread out the peak by making the enclosure look larger, not eliminated it. Maybe you ended up spreading it out over the whole spectrum and made everything better! In any case I bet the Green Room takes on a new personality these days with all that great bass! Are you happy with the plate amp? Do you think more power would add any benifit?

madmax

RuSsMaN

Good point Max. Thats a beast of a sub, with a little bitty plate amp. How is it Ron? From his intial impressions he posted, it seemed to be just fine.

R

Ron-P

I am very pleased. The 250watt plate amp is perfect, anything larger would be a waste in my small room. I doubt I am feeding the Tempest more than 125watts right now. Once I get it calibrated that my change a little. I don't even have the amp turned up to the half way mark and doubt I will ever need to. Some of the bennies of a small room, you do not need lots of power to achieve big sound.

My guess is the added polyfill really deadened the tube and killed most of the reverberation I was getting and that might have been causing the peak. I am a bit shocked that the poly-fill made that huge of an improvement, but it did. I am really looking forward to this weekend when I can get in some good calibrating. It's hard to do at night with my wife and daughter in the house.

I did realize that with a sealed enclosure that it is necessary to fill the tube with poly-fill, I only had the tube lined with a small amout and most likely the tube was vibrating uncontrolably.


Peace Out~:D

hoosier21

Well here is an update, after talking with Adire, Shiva (12") is back ordered for 2 weeks, Tempest (15") in stock, order is changed to the Tempest and a Passive Radiator.

Looks like the PSSS's will wait, it ok I don't even have the LSi9's.

So I am building an LFE subwoofer. Trying to pick a design, I will start a new thread for my project, hope I can find the Digital camera's charger.

wangotango68

here you go russ

scott:cool:

wangotango68

or this


scott:cool:

wangotango68

one more!


scott:cool:

vtec11

Originally posted by Ron-P
Tell me! I
want to build another one already.


Peace Out~:D

Excellent Ron !!

Now build me one !! haha

Ron-P

Now build me one !! haha

Allow me to guote Cuba Gooding Jr. from Jerry Maguire

Show me the money!!!!!!

Peace Out~:D

vtec11

oh damn !!

:-)