BUILDING my new sda srs 1.2tl

CLUBCARRERA

after doing testing on trying speaker box sizes for sound and lay out and buying 16 mw6503 and 16 mw6511 polk 6-1/2"drivers and 16 sl3000 tweets 2 new 18" subs that I will be converting to 18" passive radiators and all the good stuff needed to build the crossovers which are a Polk 1.2tl copy but with far better parts also using (speaker on) for my speaker to speaker cross over wire so here is my final design please keep in mine I am building these speaker for me my ears my taste ! hard wood trim is padauk with piano finish front face plate is 3/4" mdf with a glued 3/4" 7 ply plywood for strength the rest of the enclosure will be 1" mdf with full inner bracing also as my picture shows I have changed my tweeters to 8 Daton new pt2 ribbon pre speaker 16 ribbon tweeters total for the set so I will be selling my polk tweets on ebay soon I will be adding pictures as the build goes and a youtube video when done on the full build the driver is a SANSUI G22000 at 4 ohm

F1nut

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Nightfall

How did you tune the PR?

heiney9

F1nut wrote: »

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Yep, rest his soul!

I'm sure they will sound nothing like a Polk SDA. SDA's are more than just cross-talk cancellation.

H9

heiney9

How will you modify the x-over for the cascaded point source tweeter array? How will you tune the passive radiatior? How will you avoid lobing? How did you calculate the volume of the box? How are you going to modify the x-over to make sure you have low bass distortion as well as a consistent frequency response?

There's more to it than a cabinet, drivers, and a copied x-over.

H9

heiney9

CLUBCARRERA wrote: »

keep in mine I am building these speaker for me my ears my taste !

Then don't call them Polk SDA's. Have fun, enjoy and document. But don't try and convince these are more than a home speaker brew, that will likely be a big headache to dial in.

H9

tonyb

Didn't we used to call this stuff "Frankenpolk" ? LOL

More to it than filling empty cabinet holes with drivers and wiring it all up. Good luck to you anyway, this is how we learn.

xjghost

Interesting......

vmaxer

heiney9 wrote: »

F1nut wrote: »

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Yep, rest his soul!

I'm sure they will sound nothing like a Polk SDA. SDA's are more than just cross-talk cancellation.

H9

I saw the ones he built but never heard them. One guy that did hear them said they didn't sound too good but they would pound your chest.

pitdogg2

vmaxer wrote: »

heiney9 wrote: »

F1nut wrote: »

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Yep, rest his soul!

I'm sure they will sound nothing like a Polk SDA. SDA's are more than just cross-talk cancellation.

H9

I saw the ones he built but never heard them. One guy that did hear them said they didn't sound too good but they would pound your chest.

So big a$$ Cerwin Vega's in otherwords

vmaxer

pitdogg2 wrote: »

vmaxer wrote: »

heiney9 wrote: »

F1nut wrote: »

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Yep, rest his soul!

I'm sure they will sound nothing like a Polk SDA. SDA's are more than just cross-talk cancellation.

H9

I saw the ones he built but never heard them. One guy that did hear them said they didn't sound too good but they would pound your chest.

So big a$$ Cerwin Vega's in otherwords

Something like that I guess. I still have a set of AT15's I bought in the 80's.

Need to haul them off I guess.

PolkieMan

Well I think it's an interesting project and will be looking forward to seeing pictures of your progression and your opinion upon completion.

pitdogg2

vmaxer wrote: »

pitdogg2 wrote: »

vmaxer wrote: »

heiney9 wrote: »

F1nut wrote: »

I'm reminded of a former member who attempted a similar build. By all accounts they sounded horrible and in the end were dismantled.

BUILDING my new sda srs 1.2tl

Those are not SDA SRS 1.2TL's, so you shouldn't describe them as such otherwise I believe you will be hearing from Polk's lawyers.

Yep, rest his soul!

I'm sure they will sound nothing like a Polk SDA. SDA's are more than just cross-talk cancellation.

H9

I saw the ones he built but never heard them. One guy that did hear them said they didn't sound too good but they would pound your chest.

So big a$$ Cerwin Vega's in otherwords

Something like that I guess. I still have a set of AT15's I bought in the 80's.

Need to haul them off I guess.

I just got rid of mine 3yrs ago first speakers i ever bought and my first loan on stereo gear CV D12's 1983ish first thing i did was take out the tweeter and replace with a peerless silk dome.

ptrooper

Where these ever finished?

PolkieMan

Like an huge asteroid hitting Mars! LOL, your bad

DSkip wrote: »

PolkieMan wrote: »

Well I think it's an interesting project and will be looking forward to seeing pictures of your progression and your opinion upon completion.

You mean interesting like a car wreck that shuts down a highway for miles due to onlookers?

To the op, good luck, but so many things are going against you in this project before it even gets off the ground. I hope you can defy them all.

SDA1C

OP....I wish you wouldn't be discouraged by the lack of enthusiasm from other more "seasoned" members ears. Do continue with your project please and note the outcome. Longh is right, they will suck to tune in but that's part of the fun. just imagine how they will sound if you do get them tuned! Whew! concert in a box eh? LOL Whether you ever get them to admit it or not, everyone with more than a year of audio exp has tried to build their own. Good luck on ya! If nothing else you'll have a ton of spare drivers.

Toolfan66

I would like to see the finished product..

ptrooper

These would have to weigh around 300 pounds finished!

michael1947

I'm happy that you're having fun. A more useful quest may be to paint your shop including the floor thereby having a more professional work place. I think a tacky shop produces tacky results...just sayin'

F1nut

The OP hasn't been here since last December.

Toolfan66

So I wonder what happened with these??

VR3

Considering the lack of follow up... I'm afraid not well? 😕

F1nut

Was a disaster from the get go.

Toolfan66

Agreed, but it would be nice to see how far he got, and what they looked like..

la2vegas

After getting some negative feedback, I believe that he went in a different direction...