SDA Compendium 2nd Edition Is Finished

hearingimpared

DarqueKnight wrote:

There is an air leak somewhere. The cabinets are not supposed to be perfectly airtight, but the drivers should not be snapping back immediately. When I push in on my passive radiator, the drivers will slowly move move backwards for a little over three seconds, but they never move all the way back until I take my hand off the passive radiator.

Thanks Ray on second look that is what mine are doing also about three seconds and don't go back all the way until I let go of the radiator. I'm going to place some gasket around the tweeters anyway to see if that slows the rebound.

I do have one problem that seems to have cropped up. When I play some really deep bass the kind you feel but can't hear, my right cabinet seems to rattle with the vibrations. It sounds a little like the kid driving by in his car with that rediculous sub-woofer in the trunk of his car that just rattles things. It appears to be louder towards the back of the cabinet. It only does it when I really have some sub sonic stuff going on.

Any thoughts??? I'm thinking about taking the crossover out and having a look around.

Deadof_knight

Darque
I got a question how does your sub sound in the indention that it sets in, is it not boomy or does it seem to channel better than out in the open. By the way the living room I assume looks real nice.

DarqueKnight

hearingimpared wrote:

It only does it when I really have some sub sonic stuff going on.

This reminds me of the old Groucho Marx routine where he was playing a doctor examining a patient:

Patient: "Doctor, it hurts when I do this."
Groucho: "Well don't do that!"

I think your drivers may be bottoming if you are playing sub sonic frequencies at high volumes. It wouldn't hurt to take a peek inside and see if anything is "loose".

DarqueKnight

Deadof_knight wrote:

Darque
I got a question how does your sub sound in the indention that it sets in, is it not boomy or does it seem to channel better than out in the open.

See post # 10 of this thread: Bass Beast SVS PB12 Ultra

Polk65

Joe, Check that your white fluff is tucked neatly behind the stereo arrays, crossover bolt is tight, tight screws, and wires are not against the cabinet. It may also be lack of glue. :rolleyes: Check the corners inside. It could also be as Raife pointed out, a rogue driver.

hearingimpared

Thanks Ray & Steve for the feedback. Queen: "Another One Bites The Dust" is one of the culprits that causes the vibs. I hope this isn't prophesy!!!:eek:

snow

Polk65 wrote:

Joe, Check that your white fluff is tucked neatly behind the stereo arrays, crossover bolt is tight, tight screws, and wires are not against the cabinet. It may also be lack of glue. :rolleyes: Check the corners inside. It could also be as Raife pointed out, a rogue driver.

Great advice polk65. I looked at all my screws and crossover bolts also today for loose ones and found a few believe it or not:eek: even though my speakers sounded fine, its always good to do what little maintence they need. I would have went for years im sure without thinking to check. THANKS SNOW

Dennis47

DarqueKnight,

Since I do not have the 10 postings reqiured to send you a PM I wanted
to let you know I received my copy of the SDA Compendium 2nd Edition
yesterday. FAST shipping and EXCELLENT transaction....very pleased!

Thanks, Dennis47

woofiepaws

I received mine also, some days ago. It really answered a lot of my questions. Thank you!

KABII

Hello all,

I just bagged a nice pair of SDA CRS speakers. I got the interconnect cable, the original manual and two speakers in near mint condition. They are presently in transit.

Does the Compendium disucss the SDA CRS speakers?

Ken:cool:

KABII

I'd like to get a copy of this treasure trove of information. Please let me know how to get my copy of the Compendium.

KABII

hearingimpared

KABII wrote:

Hello all,

I just bagged a nice pair of SDA CRS speakers. I got the interconnect cable, the original manual and two speakers in near mint condition. They are presently in transit.

Does the Compendium disucss the SDA CRS speakers?

Ken:cool:

In detail.

snow

Thanks Raife. the compendium showed up today, great packing btw and i am a happy little reader:D REGARDS SNOW

engtaz

I would like to get a copy

Please and Thanks

engtaz

Raife,

Thanks alot, I received mine today. Props for the excellent work. If you own SDA's or are thinking about it this is a must have,


Thanks again,
engtaz

formeza13

Hi DarqueKnight,

I'd like to purchase the compendium, but I cant PM you, becuase
I dont have enough forum posts to PM.

Could you PM me instead?

Thanks

hearingimpared

hearingimpared wrote:

I do have one problem that seems to have cropped up. When I play some really deep bass the kind you feel but can't hear, my right cabinet seems to rattle with the vibrations. It sounds a little like the kid driving by in his car with that rediculous sub-woofer in the trunk of his car that just rattles things. It appears to be louder towards the back of the cabinet. It only does it when I really have some sub sonic stuff going on.

Any thoughts??? I'm thinking about taking the crossover out and having a look around.

Problem resolved. Ohskigod (Louie) fixed the problem. The passive radiator on the right speaker, the screw at 2:00 was stripped. He took the radiator out and placed speaker gasket around it and placed it back in. The screw took and was able to be torqued down. NO rattle, deep bass.

Polk65

I always wondered if Lou used his melon to test the 15" circumference. Say it isn't so.

dorokusai

Ohskigod's(Lou) Head Data = *Fs: 18.5 Hz *Vas: 10.6 cu. ft. *Qms: 5.40 *Cms: .33 mm/N *Mms: 225g *Rms: 4.85 kg/s *Sd: 805 sq. cm. *Xmax: 22 mm *Dimensions: Overall Diameter: 15-1/8", Cutout Diameter: 13-7/8", Mounting Depth: 5".

You may replace any SDA fluid coupled radiator(PR), with his head and achieve the same parameters in regards to performance. It's absolutely astonishing.

I've been here awhile and never found a Polkie so useful and musical.

Fireman32

dorokusai wrote:

Ohskigod's(Lou) Head Data = *Fs: 18.5 Hz *Vas: 10.6 cu. ft. *Qms: 5.40 *Cms: .33 mm/N *Mms: 225g *Rms: 4.85 kg/s *Sd: 805 sq. cm. *Xmax: 22 mm *Dimensions: Overall Diameter: 15-1/8", Cutout Diameter: 13-7/8", Mounting Depth: 5".

You may replace any SDA fluid coupled radiator(PR), with his head and achieve the same parameters in regards to performance. It's absolutely astonishing.

I've been here awhile and never found a Polkie so useful and musical.

Priceless Doro...Priceless.

hearingimpared

Fireman32 wrote:

Priceless Doro...Priceless.

That is priceless ROTF

bikerboy

Hi Raife,
I recieved the Book yesterday. It is packed full of almost everything you need to know about SDA speakers except the fact the Ohskigods head can replace a passive driver. How did you miss that? Other than that it is a wealth of info and will no doubt become dog-eared in no time. Thanks for collecting all of this and printing it and making it available to the polk freaks here.

Neskahi

Another newby here that would like to order.

engtaz

Raife,
Where would I get more info on SDA SRS 3.1's, manuals, reviews, brochures.

Thanks engtaz

DarqueKnight

Manuals are available from Polk customer service department.

There are no formal audio press reviews for the 3.1TL that I am aware of.

Brochures for a speaker 17+ years old will be hard to find. The best advice I can offer is to contact Polk and ask them which publications they ran advertising spreads in. You may then be able to purchase back issues either from the publisher or on eBay or Audiogon. There is a scan of a two page SRS brochure from 1991 on the www.polksda.com website.

rgiles07

DarqueKnight,

I am a new Forum member and an SDA fanatic. Mine are the SDA SRS's that I bought in 1987. POLK told me to contact you for info on upgrades. The tech I spoke with recommended your SDA Compendium. Please email me the ordering instructions.

Thanks

DarqueKnight

Welcome to the forum. I sent you a PM with ordering info. You can also find a lot of upgrade and modification information by doing a search on the forum (e.g. "SDA modification", "Improvements to the SDA SRS", etc.).

engtaz

Raife,
Polk did email me a copy of the 3.1's manual.


Thanks for the help,
Roy

hearingimpared

Welcome to the club, rgiles07. The compendium will knock your socks off.

engtaz

It is "The Reference Manual for SDA's".

engtaz