Polk Audio SDA SRS 1.2TL Crossover Modification Thread

**VR3** · 02-26-2013 04:23 PM

Yeah those things are monsters! Three per crossover!! :)

**VR3** · 03-05-2013 07:18 PM

Just returned from Richard's house -

I was very impressed with the sonic differences with the modifications! :)

**Reagan** · 03-06-2013 01:31 PM

Originally Posted by VR3

Just returned from Richard's house -

I was very impressed with the sonic differences with the modifications! :)

I will give a more detailed review after a week or two of "burn-in". However, initially I am very pleased. I spun my reference vinyl (Miles Davis - Kind of Blue) and immediately noticed new highs and deeper lows. In particular, I am very happy to hear the cymbals much more clearly. Also, both piano and cymbal notes have longer trails. I have a set of Larry's rings that have yet to be installed.

This is a must modification. Thanks Trey!

Richard

**Drenis** · 03-06-2013 05:01 PM

Did you re-use the stock internal wiring between the terminal plate and crossovers? It looks brand new and so cleanly installed if it is in fact stock wire.

Also, change out those old shotty jumpers.

Gosh I want my new crossovers sooo bad!

**Toolfan66** · 03-06-2013 05:53 PM

Trey I will order my parts piece by piece as I go along with the MR's..

**VR3** · 03-06-2013 09:15 PM

Did you re-use the stock internal wiring between the terminal plate and crossovers? It looks brand new and so cleanly installed if it is in fact stock wire.

That is the stock wiring, the last generation of SDAs I believe used all white wiring which was completed extremely neat! :)

Also, change out those old shotty jumpers.

Me and Richard talked about this - it is on the list! :)

Gosh I want my new crossovers sooo bad!

Soon! :-P

Larry - let me know man! :)

Richard - I am glad to hear you are enjoying them and cant wait to hear your thoughts as they burn in! :)

**VR3** · 03-17-2013 11:52 AM

More pictures for fun!

**VR3** · 04-01-2013 04:00 PM

Even more pictures!

**Lasareath** · 04-01-2013 04:30 PM

Nice! Are those mine?

**Toolfan66** · 04-01-2013 04:49 PM

Sexy!!!

**VR3** · 04-01-2013 06:22 PM

Thanks guys!

Originally Posted by Lasareath

Nice! Are those mine?

The ones in the middle are yours Sal! :)

**Lasareath** · 04-01-2013 06:44 PM

Cool!

**VR3** · 04-09-2013 06:40 PM

More 1.2TL pics!! :)

**Toolfan66** · 04-09-2013 06:45 PM

Nice work Trey!!

**VR3** · 04-27-2013 11:33 PM

This one starts tomorrow -

Tweeter Network -
Clarity Cap MR (All the way)
Mundorf Mox Resistors
Jantzen Inductors

Midbass/SDA Network -
Clarity Cap ESA
Jantzen Inductors

Custom shelf that attaches to the stock crossover plate for a drop and go install, powered coated satin black
Delrin substrate that mounts to the shelf, nylon stand offs between substrate and shelf
Point to point wiring
Round Aluminum terminal plates
WBT Binding Post
9 awg SDA Cable, NL4 Connections
Will be a drop in replacement...

**VR3** · 04-28-2013 06:08 PM

Yeah this is going to be "bad ass"

**Toolfan66** · 04-28-2013 06:13 PM

Trey,

Clear your inbox!!

Do you have a set of the Solen inductors? 1.0mh and 2.0mh I need two of each.. For my 1.2tl's of course..

Larry..

**Toolfan66** · 04-28-2013 06:14 PM

Originally Posted by VR3

Yeah this is going to be "bad ass"

That looks awesome!!

**VR3** · 04-28-2013 06:16 PM

Thanks man -

I cleared the inbox -

I do not have any inductors but I am about to do a Jantzen order any day... :)

**VR3** · 04-28-2013 09:26 PM

MR caps reporting for duty - SIR!

**Toolfan66** · 04-28-2013 09:53 PM

Where did the blue coating on the leads come from?

**VR3** · 04-28-2013 10:09 PM

I added that! :)

**Toolfan66** · 04-28-2013 10:44 PM

Originally Posted by VR3

I added that! :)

Please share!! What do you use?

**VR3** · 04-28-2013 10:55 PM

It is just like blue heat shrink, nothing special! :)

**VR3** · 04-30-2013 01:15 AM

The whole tweeter network - roughed in - caps not connected

**VR3** · 04-30-2013 06:01 PM

Test mount - top plate where all of the molex connections will go - this is just a test fit - don't like the stand offs on the corners, most likely will scrap that as they are not needed and it bends the bottom board - will look into alternate mounting... :)