Increase bass in SDA SRS 1.2

[Deleted User]

TOOLFORLIFEFAN wrote: »

Thanks!!!! I made a set about 6 months ago but I have yet to try them out...

Yes, let us know what you think. Cheers. :cool:

michaeljhsda2

nap wrote: »

Note: when the all-thread is screwed into the cabinet it will often wind Dacron around it like cotton candy jamming in place and requiring removal of a driver to free-up. msp

So that's what that tube is for!

michaeljhsda2

^^^^^^^^^^^
Enlarged photo of cardboard tube inside 1.2 TL cabinet.

phocion

idemo wrote: »

No offense intended to anyone here....you've all been extremely helpful and generous with your good advice. I guess I'm just not a Polk guy!

No worries, the SDA sound is not for everyone, and the bass can be weak to ears accustomed to large driver setups, even with proper placement. I think the tightness of the bass is one of the intervening factors that keeps me listening to my 1C's, usually sans sub.

Since they didn't fit your ears well, feel free to leave them outside your garage, and I will dispose of them properly for you

F1nut

At my old house with hardwood floors and plaster walls I used the bass brace, it helped. At my new house with carpet over hardwood floors and drywall I use spikes. The bass is mo' better now. However, it has more to do with the room in the new house being better for hifi than the effect of the brace or spikes.

Yeah, if deep, tight and distortion free bass aren't your thing, SDA's are definitely not for you.

idemo

Well.... Time to eat some crow...and am not ashamed to admit it. I've had a sound room that I built almost 20 years ago in one of my 3200sq ft storage barns in back of my house. It was taken over almost 6 years ago by a friend who needed a place to stay for "6 months". He just finally moved out last week.
I had to hire 4 guys to come in and help me empty everything out and attempt to start cleaning it, but at least it's usable now although there is still a ton of cleaning and work to do. It was originally built with 10" thick walls and ceiling....stufffed with insulation and then lined with 4 layers of acoustic tiles...ceiling, walls and floor as well. Then commercial carpeting was installed on everything....ceiling and walls included. It is a "sound dead" room and you can sit out there and let the music roll as loud as you want to and 20 feet outside the room it is hardly audible.
I took the Polks outside there today after it was at least usable and installed them. The room is about 20ft by 20ft square with an old couch, coffee table and comfortable to just kick back and listen in. I put the Polks almost in the corners to begin with and hooked up a pretty stout system to it...over 100 watts per channel modded with all PIO caps and upgraded from EL34s ( yuk...never did like them) to Gold Lion KT66s with the bias bumped up considerably from the 35 mils the EL34s used.... all tube....CD, Preamp and amp... the only thing not tube is the Dac Magic which I use.
The sound difference is indeed incredibly different than in my house....and yes.... there is now bass. In fact, I also brought ion my old Cornwalls which normally have much more bass than the Polks did in the house and now the Polks will outdo the Cornwalls...basswise. The owner's manual states that the speakers should be 3 to 4 ft from the walls. I originally had them only a foot away...the exact length of the crossover cable to go between them....and then tried them about 4 ft from the walls. In all honesty they make better bass when they are only about a ft from the wall.....but the end result is that yes... they are now performing as I had hoped they would....and do indeed have outstanding bass. The only drawback to the system is as I first stated.... they are very limited in where you can use them to get proper sound out of them. In my house....no....can't be done.....In the sound room they're a very different animal and I thank you all for your indulgence and patience.....and of course the good advice. I'll still have to sell them since they can't really be used in the house....or perhaps just leave them for the sound room use, but nevertheless I'm a believer now. Thank you....
Enclosed some photos....poor at best because of a light right above the camera that is giving bad spots in the photos and of course the room still looks like crap from the guy who was there 6 years, but you'll get the idea.
Thank you again for your input.
I'm still quite disappointed in the arrogance of one or possibly 2 of the mods I had dealings with the other day....I admin at one site and mod at two others and have never seen a mod actually treat someone as though they were flaming them...it shows a total lack of professionalism, but you guys were great and I appreciate it.
Thanks again!

erniejade

One of the issues with the bass in your new room, well, sorry to say this but it's your room itself!

"room is about 20ft by 20ft square" is a nightmare for something called standing waves. I learned about this myself ( thanks F1) because my 1.2's are in a 24X24 foot room. When i put them 6-8 feet apart in the center of the room, it sounds horrible but, in the back of the room or the left of the room it had a ton of bass. When i put them 2-3 feet from the corner of the room, they sound great ( without the SDA cable between the speakers try it if you still have them 1 foot out take the cable in and then take it out, it will sound better_) but doing it that waymeans no SDA effect. the SDA effect is terrible at that kind of distance between the speakers and makes the speaker sound like the bass is disappearing or the bass is big but the vocals sound like they are lost.

I brought the speakers up stairs once into my living room that is 18x13 and what a difference. THe bass got bigger and the vocals were much cleaner but, its not my listening room so back to the basement.

So give it a shot where you have them and take the SDA cable out. Take a listen. Move them in the room. It wont take away from the standing room waves but, it will help.

My solution to keep the SDA effect and the bass, because the room is too square, is i moved it all over to the left side of the room! the left speaker is 2 feet from the corner, and the right speaker is just shy of 8 feet. I listen about 9-11 feet away from them. You room might be different though and might need to be in a different place.

erniejade

and BTW Nice looking amp!!!!!!!!!

inspiredsports

erniejade wrote: »

One of the issues with the bass in your new room, well, sorry to say this but it's your room itself!

"room is about 20ft by 20ft square" is a nightmare for something called standing waves. I learned about this myself ( thanks F1) because my 1.2's are in a 24X24 foot room. When i put them 6-8 feet apart in the center of the room, it sounds horrible but, in the back of the room or the left of the room it had a ton of bass. When i put them 2-3 feet from the corner of the room, they sound great ( without the SDA cable between the speakers try it if you still have them 1 foot out take the cable in and then take it out, it will sound better_) but doing it that waymeans no SDA effect. the SDA effect is terrible at that kind of distance between the speakers and makes the speaker sound like the bass is disappearing or the bass is big but the vocals sound like they are lost.

I brought the speakers up stairs once into my living room that is 18x13 and what a difference. THe bass got bigger and the vocals were much cleaner but, its not my listening room so back to the basement.

So give it a shot where you have them and take the SDA cable out. Take a listen. Move them in the room. It wont take away from the standing room waves but, it will help.

My solution to keep the SDA effect and the bass, because the room is too square, is i moved it all over to the left side of the room! the left speaker is 2 feet from the corner, and the right speaker is just shy of 8 feet. I listen about 9-11 feet away from them. You room might be different though and might need to be in a different place.

In my humble opinion, this thread was never about the room (and the poorly dimensioned room above is not the original room where the complaint was made). I believe the intent was/is always to find a target rich environment.

erniejade

inspiredsports wrote: »

In my humble opinion, this thread was never about the room (and the poorly dimensioned room above is not the original room where the complaint was made). I believe the intent was/is always to find a target rich environment.

I agree but in the room where he has them now, I understand why he has a lot of bass now but, still don't sound quite right so, I was shedding some light on possibly why he likes the bass but, not the way they sound in the room they are in now.

nooshinjohn

^^^reported.