Polk Audio SDA SRS Modification Thread Part 2 - The "Ultimate Build"

VR3

I wanted to mention I was able to play the SDA SRS with the C Coil (.15 DCR) on a cheap receiver up to about 80-85 DB without any type of issues.

VR3

Little update

"The speakers sound spectacular. Much more open and detailed than with the original crossovers, and they really open up the music. If they will improve as the new parts get conditioned & burned in there won't be enough superlatives to describe them! To help accelerate the burn-in tomorrow the tuner will be hooked up and kept on when not using the CD player.

Tomorrow I may try them without the front covers and the internal light dialed up. When seated I may be looking right into the windows.

You have made a great speaker exceptional and resolved the problems with capacitors at or beyond their life expectancy, and the "old" technology being outdated.

Thanks for putting this project together. "

VR3

200 hour update -

A tuner was used to run the stereo system for the past 10 days with little "off" time, passing the 200 hour mark yesterday.

When now playing the same CD as in the first few hours the soundstage is much broader and deeper, and the richness and detail in the material is substantially increased (at least 30% to 35%).

The system now shows how many CDs are not recorded with a lot of depth and richness to the material. Those CDs with "depth" to the recording really come to life. The best example is with triangles on one recording where the strike, resonance, and decay of the tone is real and "suspended in air." The tight control over the bass now also brings out nuances that were not even heard with the original crossovers.

The speakers sound better than anything I've ever experienced! Thanks for making this happen, and for all of your time and effort. Let me know if there I anything I can do to help with your future projects.

He is using an assortment of high powered Krell gear with a large spacious room

nooshinjohn

wow...
WHen I get around to doing the SRS/M cabinet project, I might want to do something similar.

Congrats to both of you for raising the bar for the rest of us to follow.

VR3

Definitely man, I just ask to mix it up how it looks and is constructed. Maybe we can talk up on a cool design for it

Thank you for the compliments!

VR3

The speakers at their home

Faustin

Very nice!!

xjghost

Wow..... That is so cool!

txcoastal1

mrbiron wrote: »

Trey, your work has evolved into something quite awesome.

He's fooling you, his Transformer robots do all the work while he sleeps

Nice job

VR3

Thanks guys!! :-D

The Transformers do way more work than me... lol (I wish)

RandyCroissant

Awesome!!! I would love to hear them, I can only imagine.

VR3

Thank you sir

VR3

The owner sent me some updated photos!

ptrooper

Hey Trey
Would these upgrades change the s/n ratio , sensativety and frequency response etc?

VR3

Technically speaking, no, but you can generally see small differences between stock and modified crossovers. It is within the specifications of the speakers.

F1nut

FYI, speakers do not have a signal to noise ratio spec.

VR3

+1 DSkip, I would say the signal to noise ratio on stock crossovers is 100%, It receives a signal and outputs noise... heheheh

ptrooper

@F1nut good to see your on the ball ,,just testing ya : )

ptrooper

Toolfan66

Not sure if anyone else has noticed this but the use of the Clarity MR caps took the longest to settle in comparison to other caps I have used, (Sonic, Solen)..

Moose68Bash

Of the four sets of crossovers Vr3 Mods has done for me, the most recent set, using Clarity MRs, took by far the longest to burn in -- over 300 hours. There was significant improvement at the 250 hours point, but somewhere north of 300-325 hours my SDA SRS 1.2TLs really blossomed, opened up. An amazing experience!

VR3

I remember when the MR capacitors on my Super Towers were breaking in, me and @lightman1 were here enjoying a few glasses of alcoholic beverages around Thanksgiving. We were going through the paces on the Super Towers and it was like a switch was hit, they simply blossomed into this whole other dimension of insanity.

VR3

VR3 wrote: »

Ok, after many designs and a lot of thrown away pieces we had to find a handle design that worked. We went with a throw back of the old but more substantial, milled from 1" wide, 1/2" deep aluminum

This will come together quickly, everything gets painted soon and everything will be pre-wired
before it goes on the chassis

@xschop example 1

xschop

So cool, reminds me of a Pass Labs design/look. Nice job again.