How to fix Bass rumble or HOW I fixed it.

[silkstone]

WOW what a discussion over a 14"x14" piece of insulation.
Any way like I said doing just the feet is not cutting it and I would venture a guess that for a lot of people this may also be the case.
I now have to consider that old saying : What is the definitions of insanity? Doing the same thing over and over and over again and expecting a different result.
I am sick of it so I had to think outside the box. Putting pad's on the feet was NOT working NO matter what kind of pad used Putting it as far away as I could also did not work.
I was looking around online and seen where someone used sponge under there TT and some put them in sand and this is what got me thinking, Why not a pillow? The pillow worked but man it's too bulky and I can't keep the TT level!
So I thought what about a pad of insulation? It's 3" thick I can cut a small square the size of the TT body. So I did just that.
Since this is working I am NOT going to change it but I will update you on it. I have it covered , Wrapped up really in a cloth and set the TT back onto the pad I made.
See thing is for testing a piece of material I think it was safe you make it sound like I was waving it around or playing with it or some how the slightest little movement of air around it is some how going to do some adverse thing.
I thank you for your concern and your well thought out reasons why not to do what I am, But I am okay.
And really if this helps ANYONE that has been suffering without end like me to solve this issue, I am happy.
Also note like I said this is the second material I have tested (Pillow was first).
I'm looking at some foam too but it needs to be a square piece 14"X14" must be "soft" enough to "cradle the TT in a "bed".
Oh I have a very nice but cheap Denon DP297 TT it only cost's $150.00 Bucks. No plans on getting anything "better" I happy this one is doing the job finally perfectly and that is all I need.
Also this did not cost me a thing and it is out of material I have in home and on hand. Free is a very good price, IMHO.


I never really thought of this but that sounds amazing! See it's things like this that make me happy.

so now here is what it looks like.
View attachment 142572

I agree. Fiberglass is fine. people have it in their attic and walls. Maybe, if you were manufacturing the stuff, it'd be harmful, but not as a little pad like you have. It's just itchy as hell. The 'itching powder' you could buy as a kid was just strands of fiberglass insulation. It does look a lot better now you have it covered though.

 

[Grog6]

My car systems are limited by the speaker capabilities; 75W rms for 4 channels, and 550rpms for the sub.

It's much louder/better than my house system, but I just repaired an amp that will take that to 120rms, 0,001% distortion.
We'll see if that helps, it's only 3dB.

 

[basco]

we just want ya to be safe Mr.trickson

 

[freeagent]

What about a granite slab, or even concrete, rubber isolation feet?

 

[trickson]

What about a granite slab, or even concrete, rubber isolation feet?

Tried it and it never worked for me. in fact it made it worse.
Plastic picks up and resonates sound much better than say wood.

 

[robot zombie]

Can I just take a minute to say I just realized you're watching Trailer Park Boys? Good man.

 

[trickson]

Can I just take a minute to say I just realized you're watching Trailer Park Boys? Good man.

Yes I am. I do every day as I have for 20 years now. I love them.

 

[EarthDog]

Yes the sub is dual amplified and 800Wats total power out.

I'm wondering how this actually works/how it is wired. Is it a dual voice coil setup and you have each side powered? How does that work with such lopsided amounts of power going to each? Honestly, I I don't see the need for bi-amplification if you have several hundred watts on one amp...

Just as a side note, your THD ranges from 0.05 % - 0.7 % depending on frequency. Still not a lot, but not 0.005 either.

 

[trickson]

I'm wondering how this actually works/how it is wired. Is it a dual voice coil setup and you have each side powered? How does that work with such lopsided amounts of power going to each? Honestly, I I don't see the need for bi-amplification if you have several hundred watts on one amp...

Just as a side note, your THD ranges from 0.05 % - 0.7 % depending on frequency. Still not a lot, but not 0.005 either.

Well the Sub goes through a pre-amp then it goes into the Power sub.
The powered subwoofer is all I am counting that is 800W.
I'm not sure what the pre-ampout is for the sub though.

Also just a side note: My speakers and the crossovers that are in them are more than enough to compensate for any THD that this system can produce.
When you take the speakers into account ( As any Audiophile does) and get the best then THD is a non sequitur.

 

[EarthDog]

Well the Sub goes through a pre-amp then it goes into the Power sub.
The powered subwoofer is all I am counting that is 800W.
I'm not sure what the pre-ampout is for the sub though.

Does a pre-amp send any power to the speakers? I thought it is line level and the Amp amplifies that signal...

That said, the amp on that sub is 800W? Nice! What model Klipsch is that?

 

[trickson]

Does a pre-amp send any power to the speakers? I thought it is line level and the Amp amplifies that signal...

That said, the amp on that sub is 800W? Nice! What model Klipsch is that?

The AMP is not Klipsch it is a, Though I think they did make some of the Energy line.
Energy S-10.3 800-Watt
Got it from a goodwill bin the woofer was toast and so was the box but the AMP was still good LOL.
The Klipsch speaker is from a system I got a while back that I had I took it out and modded everything. It's a mess of different things ( Probably why the foam tore in the first place lol) but works great.

 

[EarthDog]

Also just a side note: My speakers and the crossovers that are in them are more than enough to compensate for any THD that this system can produce.
When you take the speakers into account ( As any Audiophile does) and get the best then THD is a non sequitur.

Generally, the crossover doesn't have much to do with THD levels (what do you mean by compensate?? That doesn't make sense). We assume all speakers of decent quality (as yours are) are crossed over in the first place (that is correct with vs without, but any with doesn't affect THD). But if the speakers get sent 0.XX% THD, the crossover doesn't filter out any distortion, but simply chokes the frequency one way or another (AFAIK).

 

[trickson]

Generally, the crossover doesn't have much to do with THD levels (what do you mean by compensate?? That doesn't make sense). We assume all speakers of decent quality (as yours are) are crossed over in the first place (that is correct with vs without, but any with doesn't affect THD). But if the speakers get sent 0.XX% THD, the crossover doesn't filter out any distortion, but simply chokes the frequency one way or another (AFAIK).

I'm no expert at all. I do know however that a good speaker system with good crossovers and a good system can an does help with THD.
Though it is present I doubt that the human ear or at least MINE can hear it.

 

[EarthDog]

with good crossovers and a good system can an does help with THD

No you are not an expert, lol. Neither am I... but as I said, a crossover doesn't really affect THD. All it does is send high frequencies to the tweets, mids to midrange driver(s), and low to the woofer/sub. The signal is already amplified when it hits the crossover so any THD that exists is already there.

How to choose a crossover

Send the right signal to your speakers and tweeters

www.crutchfield.com

I know you can't 'hear' it, but my point is to supplement the information you have and increase the understanding.

 

[trickson]

No you are not an expert, lol. Neither am I... but as I said, a crossover doesn't really affect THD. All it does is send high frequencies to the tweets, mids to midrange driver(s), and low to the woofer/sub. The signal is already amplified when it hits the crossover so any THD that exists is already there.

How to choose a crossover

Send the right signal to your speakers and tweeters

www.crutchfield.com

I know you can't 'hear' it, but my point is to supplement the information you have and increase the understanding.

Got it, and I thank you I love to learn new things, I do not know everything far from it. I can be and have been taught wrong though. I have however heard a difference from a cheep crossover the one where they just use a cap. and ones that use fancy boards with strange coils and caps on them. Bose does this Sony uses nothing more than a cap. But yeah to really hear 0.0005% or 0.7% is really hard IMHO. But I am not an expert by any means just a guy that loves great sound at high volume and I have achieved just that IMHO.
I really wished you could hear this setup now, It''s just off the chart AMAZING!
So the crossover isn't also a sound filter? I always thought it was not just a fine tuner but a filter to straighten out the signal making it more uniform like straightening out the highs for the tweeter and the mids for the mid-range and so on. but I guess I am leaning new things at my old age.

 

[EarthDog]

So the crossover isn't also a sound filter? I always thought it was not just a fine tuner but a filter to straighten out the signal making it more uniform like straightening out the highs for the tweeter and the mids for the mid-range and so on. but I guess I am leaning new things at my old age.

The link I provided tells you exactly what a crossover does.

A crossover is an electronics device that takes a single input signal and creates two or three output signals consisting of separated bands of high-, mid-, and low-range frequencies. The different bands of frequencies feed the different speakers, or “drivers,” in a sound system: tweeters, woofers, and subwoofers.

Think of a crossover network as an audio traffic cop, directing highs to your tweeters, midrange to your woofers, and low bass to your sub.

 

[freeagent]

Sometimes a little extra THD can make the sound a little warmer, but generally more isn’t better. It depends on the amp I guess. I recently sold off my collection of Denon’s and h/k’s.

 

[fyud64]

Trick
I too have been taken prisoner from the RUMBLE MONSTER. I have a very nice audiophile system with a tt and have recently been unable to enjoy it due to Rumble coming through my speakers and subwoofers. Today I said to myself that I did not want to listen to my VPI Tunrtable until I get rid of the Rumble. I did a Google search and was directed to your post about Rumble. I'm going to try it and I will get back to you soon with my results. I am so, so sick of Rumble.

 

[agentnathan009]

Okay let me see if I can explain this a bit better.
I have for some time been dealing with Bass Rumble coming through my Turn Table, In fact I have been struggling with it for 40 years! I have really tried everything.
I then just said to myself if this issue isn't getting solved with all the standoff padding then there is something else going on.
I thought maybe it's the sound vibrations resonating in between the air space from the standoff's to the TT case. So if this is the problem how do I solve it?
Well one way is to set it on something like a pillow but the entire TT not just the legs. I tried that and wallah! it worked but I can't just cut up a pillow or leave it on one so I tried this and it worked just like the pillow but even BETTER!
My theory is that the air space from the legs to the TT is resonating through the case of the TT and into the stylist, It works great I will try out some other material but for now I am HAPPY.
It is fiberglass insulation people NOT asbestos!
It's in every HOME in every attic and in every wall and yes YOU do know it is also used to insulate heating and air ducts right?
Yeah it's NOT going to kill or harm anyone. LOL.

Fiberglass insulation is not asbestos, but the crushed/broken glass fibers are still a hazard to your lungs and in the state of California glass fiber insulation is considered a carcinogen. I would consider finding a substitute. As an FYI, asbestos is a fiber substance as well, just like glass fiber, though its source (naturally occurring rock) is different. You could try putting your sub on SVS sound isolation feet to help isolate the sub from your house structure and similar or the same feet for turntable. I use the SVS isolation feet on my SB-2000 and they work well.

SVS SoundPath Subwoofer Isolation System | Fix subwoofer rattle and improve bass (svsound.com)