Inner Tubes are a joke. Here are ones that do work.
1)Speaker placement. For example with a 12 X 12 room place the listening chair/couch 3' for rear with speaker 3' from side walls and 2 1/2 from rear. Use this formula and toe in 3 imches. It will work. Spike and and all speakers and subs.
2) subs sound better up front on one side or the other cross firing edge of woofer parallel with edge of front speaker
3) Do not put sub or speakers in a corner
4)soft pucks helps cd players and transports
5)get a dedicated audio stand -fill with play sand
6)let equipment warm up stabilize before listening at least 30 minutes
1)Speaker placement. For example with a 12 X 12 room place the listening chair/couch 3' for rear with speaker 3' from side walls and 2 1/2 from rear. Use this formula and toe in 3 imches. It will work. Spike and and all speakers and subs.
2) subs sound better up front on one side or the other cross firing edge of woofer parallel with edge of front speaker
3) Do not put sub or speakers in a corner
4)soft pucks helps cd players and transports
5)get a dedicated audio stand -fill with play sand
6)let equipment warm up stabilize before listening at least 30 minutes