RDO 194 Tweeters For SRS 2's JUST Arrived !!!!

ka7niq

Fed X just rung the dorbell, and suprise, suprise !
There are my new tweeters!
The cordless screwdriver is all charged up, and off I go to stick em in!

avguytx

You'll love 'em. A week later and I can already tell a difference in mine. The more they play, the better they are sounding. Congrats!

ka7niq

avguytx wrote: »

You'll love 'em. A week later and I can already tell a difference in mine. The more they play, the better they are sounding. Congrats!

Yeah, I can already hear a BIG difference!
Had to take my time, the tweeter gaskets are fragile.
I ripped one a little, but still is usable.
They are both more extended and smother too.
Of course, the suspension must soften up ......
This will only come about after a LOT of play time.

Still need a 6510 :mad:

Playing them anyway in SDA with the MM 6510 stuck in there

It's better then a frozen driver ....

My new caps are being made for me, the order was placed by the rep, still 6 weeks away.

Might as well get some decent resistors in ?

I plan on going "all the way" with my new babies, NEW 6511 and 6510 drivers ALL around

Since I pulled the damping pads back into place, I feel no pressing need to play with more/different damping materials.

I WONDER what the NEW 6510 and 6511 drivers will sound like ?

There are WAY better glues/cones etc, etc, around today, one would THINK the NEW drivers have to be better ?


I put the old SL 2000 tweetrs right in the new tweeter boxes, maybe put em on Ebay?
They can give life to some other Polks ?

DarqueKnight

ka7niq wrote: »

I put the old SL 2000 tweetrs right in the new tweeter boxes, maybe put em on Ebay?

I'd put them under my pillow and see if they turn into 6510's.

ka7niq

Yeah, maybe the "Polk Fairy" will turn them into 6510's ?
What do you think about the new bass/midrange drivers vs the old ?
Do you plan on replacing all your drivers too ?

avguytx

I'm not replacing mine. They all work fine.

I just got an email from Ken saying that the replacement MW6510 final vendor sample was approved and are now waiting for them to be built. They are still 60 to 90 days out, though.

ka7niq

avguytx wrote: »

I'm not replacing mine. They all work fine.

I just got an email from Ken saying that the replacement MW6510 final vendor sample was approved and are now waiting for them to be built. They are still 60 to 90 days out, though.

Are there plans to also replace 6511 drivers ?

You know a LOT of driver advancement has happened in 20 some years.

One would THINK the drivers of today would be better ?

ONE 'advantage' of an older driver could be the well broken in surround.

The softer surround is generally more lossy, and may have an easier time damping the drivers resonances ?

danger boy

i'm currently breaking in a MW6503 in my SDA 2B left channel. it's much stiffer as expected than the 20 yr old driver in the right speaker.

congrats niq on your new RD0's

Joe08867

Of course drivers have advanced in the last 20yrs. The problem with replacing the older polk drivers is finding ones that act the same as the original drivers or it would color the sound differently. Change the imaging, maybe not even work well with the other drivers in the cabinet and so on and so on.

As for using older drivers that are broken in is you never know what you may get. If your luck is good or it is a respectable person you can get something wondrerful, if not you could get a driver that is on its last legs.

I do have to argue about the drivers of today being better. It all depends on the situation. Replacement drivers should sound like the originals. for the reasons I stated above.

If you were to say build a new speaker system I am sure you can find drivers that have more excursion or better imaging but it all still has to match the enclosure it is going in. Meaning the right driver, for the right job.

heiney9

I'm guessing here, but I'm sure the "new" drivers will be very similar in appearance to the older MW's and I'm sure the electrical characteristics are exact. I'm guessing even the materials are the same or pretty close.

I wouldn't expect some exotic new driver to use as replacements. They need to sound the same and act the same to blend with the older drivers. Not at all like the RD0 tweeter which is actually an improvement and was developed because the tri-laminate tweeter could no longer be manufactured using the same process.

I'm guessing that's not the case with MW 6510's. They can still be manufactured to spec exactly as they were and exactly as other POLK MW series replacement drivers are. Doped paper is still considered to be an excellent choice as well as butyl rubber surrounds. Maybe basket stampings could be (have been) improved but other than that I've never seen an MW driver come unglued or rot out. The VC magnets are another story some 20 years later.

H9

avguytx

I would assume they would want them the same or as close to the originals as they could get them. Especially since I had sent them (2) of my MW6509's for evaluating against the replacements. Sure, there are "esoteric" cone materials but who cares for these. They don't need it...why ruin a good thing. I agree with heiney9 in that it's hard to beat a good doped paper cone. Using some other form of kevlar, poly, etc, etc, would give them a different sonic signature. Which, I don't want.

I like the fact that all 8 of my MW6509's are original.

ka7niq

Esoteric materials like Kevlar and Metal/Carbon Fiber require steep crossovers and sometimes even notch filters.
They are definitely out for the Sda speakers.
I too like doped paper, but a good poly cone can be awfully good too.
Voice coil winding techniques, wires, and lighter voice coil materials have been developed leading to FASTER drivers for a given magnetic flux.
IF i were a betting man, I would think the new drivers to be superior to the old.
How could they NOT be ?
Driver development has come a LONG way in 25 years

ka7niq

avguytx wrote: »

I would assume they would want them the same or as close to the originals as they could get them. Especially since I had sent them (2) of my MW6509's for evaluating against the replacements. Sure, there are "esoteric" cone materials but who cares for these. They don't need it...why ruin a good thing. I agree with heiney9 in that it's hard to beat a good doped paper cone. Using some other form of kevlar, poly, etc, etc, would give them a different sonic signature. Which, I don't want.

I like the fact that all 8 of my MW6509's are original.

I appreciate your desire to Keep em stock.

danger boy

the MW6503 that i just got is not as tacky as the old one.. other than that it looks the same from the front.. except as mentioned before. the rubber surround is a bit to large, and needs to be trimmed a little bit or the screws make it look all bunched up.