Years ago while upgrading my Dunlavy SC4's the first thing I did was seal the interior walls of the enclosure. Huge difference. Next was to build a multi resistor bridge using Vishay metal film resistors..Huge difference enough to make me wake my daughter and have her listen. Inductors swapped for North Creek 8 and 10 gauge..a little difference. Built multi caps to swap for the stock single value Solens. Things got worse especially in the bass lower mids.
Single upgrade cap in comparison to the same value Solen..the sub cap sounded much better. With that experience in ear and mind I built multi caps stacked all of the same manufacturer type and brand the outcome sounded thin and less involving. Its as if the bass was now combed and filtered ..multifiltered uneven in transistion. All caps were built within 1% of original published/printed Dunlavy values. My experience in this rebuild venture makes me profess the cabinet seal material the resistor bridges as well as the inductors. The multi-cap mis-adventure or by-pass has since made me stay with single cap swaps only..which I feel make for a better listening experience. Thats how I heard things . Tom
Single upgrade cap in comparison to the same value Solen..the sub cap sounded much better. With that experience in ear and mind I built multi caps stacked all of the same manufacturer type and brand the outcome sounded thin and less involving. Its as if the bass was now combed and filtered ..multifiltered uneven in transistion. All caps were built within 1% of original published/printed Dunlavy values. My experience in this rebuild venture makes me profess the cabinet seal material the resistor bridges as well as the inductors. The multi-cap mis-adventure or by-pass has since made me stay with single cap swaps only..which I feel make for a better listening experience. Thats how I heard things . Tom