Polk Audio LSiC Crossover Modification Thread

This should be fun!

Will be a Fortress "stack" modification but with remote mounted parts...

This will also feature a "STOCK" Recording and a "MODIFIED" recording! :)

So trey is this recording thing going to become a standard thing? I think it is pretty cool and a great way to show what the mod does. Maybe post the waveform before, after and then overlaid so you can see what gets added?

It will be "normal" for things that I actually have access to.. :)

We will always try to do a direct comparison recording where we will take three particular pieces of a recording and play them back to back!

My goal is to have an outlet to listen to hundreds of speakers by recording.. any brand, any model...

By the middle of January I should have recordings for -

Definitive Technology PM900
Definitive Technology CLR1000
Polk Audio RT55
Polk Audio RTi10
Polk Audio RTi8
Rogers LS7
Polk Audio LSi9 Stock and Modified
Polk Audio LSiC Stock
M Audio BX5D2

By the end of the month I should have -

Polk Audio SDA 1.2TL Stock
Polk Audio LSiC Modified

And in February or March

Polk Audio SDA SRS 1.2TL Modified
Tyler Acoustics Linbrook Signature Stock/Modified

So I guess the real question is how much can you fit inside of a LSiC? a Vr3 Fortress is how much! :-P

LSiC with the large inductor broken up into two inductors... made it a bit more challenging

Nice work under challenging conditions.

By the way, have you ever thought about consulting on organizing closets and basements? :smile:

Well done, Trey!

LOL! I think I could organize a mean closet! :)

Thanks for the kind words!

Stock recording posted -

http://soundcloud.com/vr3mods/polk-audio-lsic-stock

Modded Recording Posted -

http://soundcloud.com/vr3mods/polk-a...c-vr3-fortress

Think I finally got it down! :)

nicely done.

Thank ya sir! :)

I just modded the LSiC crossover but have noticed that the left driver is very very quiet, almost silent, while the right one is very loud. The driver I can hear (as well as the tweeter) sound very good, but I'm wondering if maybe I screwed something up. I never really payed close attention before to know if it has always been that way pre-mod or not. Perhaps the center is just not getting a lot of frequencies for that driver? it's crossed at 80hz. Has anyone noticed a driver level difference before/after mod? Thanks.

Used Sonicap Gen1 for the high, Erse PulseX for the low. Mills resistors.

The woofers do play different frequency ranges. Most (if not all) MTM center channels do this.

The left driver does almost all bass - standing in front of it you may even think it is doing nothing... :-P

Thanks guys. Confidence restored; gonna tackle the LSi15s next weekend...