This auction is for upgraded parts for POLK SDA-CRS . The auction is for a pair.
Package includes all capacitors/ resistors / PTC upgraded parts with lower distortion and higher resolution preformance comapred to the original parts.

Bring back the crossover to above the original specs with these higher grade audiophile parts.


Parts provided:
*(8) Nedlab hi-fi film capacitors 
*(4) Film type non-inductive resistors
Note: Includes PTC protection replacement.


Get more powerful better extended low frequency,  cleaner midrange, and smoother higher resolution treble. The speaker will come to life with new levels of detail and dimension.

25+ years of experience in hi fidelity crossover design.


Customer comments:


I finished installing the crossovers today. Speakers sound fantastic! Thank you for another job well done!The quality of your work is well worth the wait. Thank you again!

E.N.


another customer....

Installed the crossovers over the weekend. Speakers sound FANTASTIC! You restored the upper range frequency response.
Thank you for a job well done!

The speakers now sound incredible!

E.D.


another customer.....


"Hi, finally got the crossovers installed.... they sounded very very good out of the box... after about 20 Hours run-in, everything is opening up nicely.  The new crossovers are a huge improvement over stock... massive soundstage, much better clarity and instrument separation and the bass is tighter.  Most of all, everything blends together in a supremely musical way.  With a good vinyl recording, the results are simply stunning!" 

C.G.


another customer.....


"They connected easily enough. The difference is night and day. They settled in really fast and the first thing we noticed was the transient detail. The speakers don’t sound lazy anymore. The transients are tight and impactful. The bass is presented beautifully- we were able to pull our alignment filter. There is more space.

These are the speakers they should have been all along. Thank you for taking care of us.

P.G.



 another customer........

“Perfect!! Thanks again. Sounds great !!”  

(J.D.)