What is Fortress Level?

Polk Audio (Click your model)

LSi Series
LSi9 - NEW DESIGN
LSi7 - NEW DESIGN
LSiC 
LSi15 - NEW DESIGN

RT Series

RTiA7
CSiA6

TSi Series
TSi400

LS Series
LS90

More models are available than what is listed below! Please contact us for more details!



Please see below for examples of previous archived work. Please note modifications are performed on a case by case basis and not sold as completed skus.


Polk Audio (Click your model)

Fortress Plus
RTiA7
CSiA6


Tyler Acoustics (Click your model)
Taylo Monitor (Peerless Woofer)

All aforementioned modifications are not endorsed by the respective manufactures.
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