Speaker Re-Foaming
 

Spent the better part of the day replacing the foam surrounds on my Yamaha NS-A2835 floor speakers. (it was snowing all day). Each one has two woofers that the foam was almost completely gone.
They also have a mid-range and a tweeter. (no foam damage on those)

Took about an hour for each one...most of the time spent removing the old glue.
Here's the third one I did...gets easier with each one.

http://forums.pelicanparts.com/uploa...1709154190.jpg

I also found the tweeters on both had a crinkled film cone. Took them apart and pushed them back into shape with thumb....done. Don't know if being pushed in makes a difference in the sound?

http://forums.pelicanparts.com/uploa...1709154404.jpg

nice!

This is something I have always wanted to try. The subwoofers in my jukebox definitely need this done as the foam is starting crack and disintegrate.

^^^ Thanks....it was easier than I thought it would be. They send very detailed instructions with the kit. Here's a link to the one I used..it's enough for 4 speakers. They have kits for any speaker.

https://www.amazon.com/gp/product/B00CQ8P9QO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

The bottom one on the front right speaker was by far the worst of the four. I was wondering why until I realized the floor furnace register is close to it. The foam was completely gone. :)

Re-installed all the speakers in the cabinets....dug out my Sony speaker calibration microphone.
Let it adjust the speakers to the correct listening level...which I haven't done in years.

They sound like new again...very pleased with the sound.:)

Look good!

^^^ Thanks
I have a question for anybody that uses a sub...
My Klipsch ported self-powered subwoofer has a cross-over setting that I'm trying to set right.
It's used almost entirely for streaming movies and some cable tv. I have the cross-over set now at 100 hz and the gain is about a 2 out of 10 (hardly up at all)
The bass is still a little too boomy. Should I just lower the gain? Or is my cross-over set wrong?
The phase is set at 0

I wish I could answer your question specifically but subwoofers are too much in a home setting for me. It would be nice if you could alter the frequency, not just the crossover. 50 Hz is always going to 'boom'. It would be interesting if the range could be changed to 100 to 200 Hz and then set the volume.

^^^ I'll try moving the cross-over up some. I haven't tried that yet....Thanks.

This Klipsch has a 12" sub and it replaces an Advent with a 15' sub
The Advent was old and the capacitors gave out so I sold it on CL and bought this Klipsch.
I retained the settings from one to the other and the Klipsch is no where as good as the Advent was.
I'm starting to wonder if I should have gone with another 15" sub.

Good to see your staying out of the bars and doing something constructive.

Yes...but I think bars are cheaper when you add the cable bill, streaming bill, and beer.:)

Another thing I just thought about...My Advent was not a ported subwoofer where this Klipsch is.
That might be part of the reason why.

@stevej37 Hard to answer without having an idea of the modes in your room and the frequency response range of your speakers.

Now (not what i do with my 2-channel system but I do on my movie setup) get REW (free), a miniDSP UMIK1 microphone and a MiniDSP DDRC; tun the measurements and ask REW to calculate an eq curve.

Its magic especially for movies and every day listening!

Is that the same as the Sony speaker calibration microphone? Post 4

My amp is fairly new...a Sony 5.1 and it came with the set-up microphone. It seems to work well for the fronts, rears, and center....but the sub just won't perform like my old Advent. The Advent would shake the room at low frequencies....this one booms.

For what it's worth, I'm running my Infinity speakers without a sub. My front mains are Column II's with two bass speakers each, the down firing ones are low freq only, I forget what the cross overs are at. The rears are CS3008's with similar bass speakers. I find that some TV shows and movies are so bass heavy that it feels like the house will shake down.
Nice work on the refoaming job. I've done all four of my speakers and they really are fun to listen to.

Can you please give me the dimensions of your room, L W H, your sitting position and the position of your speakers and subwoofer(s)?

Does your Sony run any of the "room correction" systems?

Also speaker and sub models

Remember, subwoofers for movies are mostly for "LFE" (low frequency effects) and for music, they are used to extend the low frequency response and to fill in voids caused by room modes

The room is 18X18 ft. and 8 ft high. All seating is opposite of the front speakers about 12ft away.
Rear speakers behind the listening area and about a foot higher. Sub is in one front corner and the front speakers are at the edges of my 65" tv.

Speakers are Yamaha NSA 2835 for the fronts, Bose 201's for the rears and a JBL SC-305 for the center front on the tv stand under the tv.

My Sony amp has about a dozen selectable sound fields. I normally use the Movie HD-D.C.S. setting....it sounds the best to me.


Edit: I realize the 201's are reflective speakers and have compensated for that. They sit on shelves on each side so that the sound is reflected off the back wall.
The Sony model is STR-DH590

Also, I always have the tv speakers set to 'off'

the sub is a Klipsch R-120SW

This might explain it better....

http://forums.pelicanparts.com/uploa...1709229772.jpg

Steve get that sub away from the corner, try 7' out. You can try plugging the port. Have you tried running it 180 deg out of phase with the other speakers. I would also run the crossover lower 50-80hz, those main speakers should be able to go below 80hz.

Steve, does your system allow you to tell it the size or ask for the size of the different speakers in the different locations?
My Denon system uses the Audyssey system which asks the size of the surround system speakers when it does its thing.

That's the same spot that I had the Advent in and I loved that thing. It's actually at the side of the right front speaker.(I didn't correct the pic for that)
The pic is wrong for the fronts and surround because it would be hard to show that the center speaker is below the tv and the R and L fronts are in line with the tv also.
I never thought of plugging the port...that would be easy to try, which I will tonight. (an old t-shirt should do the trick)

Haven't tried switching the phase either...the Advent was always 'in phase'.

Yes, the Sony Amp has that. I have the front speakers as large, the rest as reg. The center I have bumped up a db or so because I need more mid-range for dialogue.

Bass is omni directional from what I've read, but that corner location couldn't be helping it IMO.
Is it facing the same direction that your Advent was?

When I changed my rear speakers from the smaller ones I had stashed behind the couch to the Crescendo's all I did was go into the system and tell it I had Large speakers in the rear.
Sometimes, even with TV commercials, I worry my wife will come in and tell me to turn down the volume but she hasn't yet so I guess I'm good to go.

Yes...same direction aimed at the listening area.
I just measured and it's 3 ft from the side wall and 2 ft from the front wall.
Facing the back wall.

I just copied that pic from the Sony manual....I didn't pay much attention to the sub location, but everything else is quite accurate.

Do you have a recorded passage where it booms that you can play over and over again?
You could try different locations for the sub if you do.
That'd be one way to find a location where it doesn't boom.

^^^
I have a Blue-Ray disc player that I could hook up to try that. (I didn't use it for at least two years, so I pulled it)
But the room and traffic area limits the amount I could bring it out. The front of the sub is in line with the front speakers and the tv stand.

My speakers behind the couch are laying down on their backs on 4x4 blocks, firing at the ceiling. They have ports on the back sides for the bass speakers.
You might try laying it down to see how it works.

With your main speakers having two 8" woofers I would keep the subwoofer crossover lower down around 50hz. See what the room sounds like with just the sub at that freq. And try up to sub location 6'-8' from the front wall, or centre of front wall.

The bottom or sides would show the plastic feet and not the grille. The back side has the connections, so I would need to block it up as you did.

I think the location of it is about the best I can get....given the room. Tonight I will try stuffing the port first, and switching the phase.
I might reconnect the Blue Ray and load up 'The Matrix'. One of the best test discs.:)

I'll try to simplify as it could take a lot of typing to explain it all.

Your room has modes at 31hz (dip/null at 8.7' approx.) 63hz (dip/null 12') 94hz (14'approx) 126hz (15 ft).. both lengthwise and widthwise.

When you say you are 12ft away, is that from the front wall or from the speaker's faces?

I would put my ears closer to 10' from the front wall to stay away from the nulls. By the way, sitting at the center (widthwise) puts you smack in the center of the null at 31hz and 94hz.

As to crossover setting on the sub, your Yamaha's go down to 55hz so I would set the sub at 65-75hz to get it to blend as the Yamaha's drop off.

These are just suggestions, I will try to give you ideas of positioning for the speakers

I can't even see my rear speakers, which I'm sure pleases my wife.

I like the fight scene in Sherlock Holmes where he fights the guy under the dry docked boat. There are some passages in it that you feel more than hear.

I will try that...I haven't had it that low yet. The Sony has the options for sub placement in the menu.
The gain is so touchy on the sub that the smallest twist makes a big difference.

12ft from the speaker faces.
As to where I usually sit....off to the right side, not the middle.
I will try the lower cross-over tonight....I'll leave the gain as it is.
Thanks for your research.

and the speakers are how far off the wall?

They (front, left, center, sub) are all close to 1 ft off the wall...measured from the speaker backs. All in a line because of the tv stand holds the center speaker.
The back speakers are flush to the outside walls...because they are reflective.

Your room's modes:

http://forums.pelicanparts.com/uploa...1709238074.png

Not too bad (according to modeling). I am assuming the speakers face is 1'11" from the front wall and 3' from the side walls. In this setup you have a null at 54.5hz which the SW will/should correct.

Try bringing L/R away from the front wall 2' 11"(to 3') to the face of the speaker and see if you like it better. Don't worry too much about maintaining the same distance (to the listening position) as that of the center channel. Not such a big deal and you will gain quite a bit of soundstage.

http://forums.pelicanparts.com/uploa...1709238116.png

You can play with the position of the subwoofer. It is not ideal but if it doesn't feel right to you, I would put in on the sidewall at "1'11" or 5'9 from the front wall.

here it is a 5'9". You remove replace the null at 54 with one at 46 albeit not as deep and reduced the null at 80!.

http://forums.pelicanparts.com/uploa...1709238164.png

These are all suggestions but let your ears (and WAF) make the final determination.

If you are aiming for music listening, I would suggest something different. Hope this helps.

Maybe closer to two feet from the face to wall...the Yamaha towers are 14 inches deep.

The system is used 100% for tv and movies....streaming on Netflix is the largest use.

I can't move the speakers out much....there is a coffee table in front of the couch and that cuts down on the thru traffic area already.

I'm going to try getting the sub to work better first. The pic below is the back of my old Advent...I don't see anything on it that would make it better than the Klipsch.

Thanks.


http://forums.pelicanparts.com/uploa...1709239211.jpg

^^^^ Why does it say Sunfire (i.e. Bob Carver) on it ;). I'm not a fan of subwoofers, but was always under the impression that their location wasn't as critical like speaker placement is....

I wonder if Rusty knows :D?

I have a couple of Sunfire Signature Subs for movies. For music, my little speakers have plenty of bass extension ;)http://forums.pelicanparts.com/uploa...1709240397.jpg