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Home / Polk Upgrades / Polk Signature XT20 “Polk Signature XT20” has been added to your cart. View cart Polk Signature XT20 Rated 5.00 out of 5 based on 1 customer rating (1 customer review) $185.00 The new upgraded crossover includes all new parts: US Coils, and top level resistors. It includes new wiring, a set of tube connectors and one sheet of No Rez for cabinet resonance control.   Polk Signature XT20 quantity Add to cart Category: Polk Upgrades Description Additional information Reviews (1) The new upgraded crossover includes all new parts: US Coils, and top level resistors. It includes new wiring, a set of tube connectors and one sheet of No Rez for cabinet resonance control.     Additional information Weight 10 lbs Dimensions 24 × 14 × 4 in 1 review for Polk Signature XT20 Rated 5 out of 5 R.J. Harbaugh – August 11, 2026 I ordered the upgrade kit and splurged on the Sonicap’s. The cabinet really needs NoRes in the worst way, one other thing I did was glue a small brace in the back of the baffle between the midwoofer and tweeter. Danny was not kidding about the lack of thickness in the cabinet walls. Overall the results are great, the Sonicap’s really came alive after 30 or 40 hours of play. The JB caps that come with the basic kit are so much better than the stock crossover parts that they should provide most of the benefit of a Sonicap. For an inexpensive speaker well under 200$ on sale, along with the low cost of Dannys upgrade, the results are worth the effort. Don’t worry about installing a crossover board there is plenty of space on the floor of the cabinet. Add a review Cancel reply Your email address will not be published. Required fields are marked * Your rating *Rate…PerfectGoodAverageNot that badVery poor Your review * Name * Email * Save my name, email, and website in this browser for the next time I comment. Type in the text displayed above Δ document.getElementById( "ak_js_6" ).setAttribute( "value", ( new Date() ).getTime() ); Related products Polk Monitor 30 Upgrade Kit (Pair) $270.00 – $299.00Price range: $270.00 through $299.00 Polk LSiM 703 Upgrade Kit (Pair) $700.00 – $1,039.00Price range: $700.00 through $1,039.00 Polk Signature S-20 Upgrade Kit (Pair) Rated 5.00 out of 5 $335.00 Polk R200 Upgrade Kit (Pair) $410.00 – $499.00Price range: $410.00 through $499.00