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Dual Opposed RSS390-ho4 or HF (11.5 Cu) - long, low 12-15hz - Help needed
I've been playing around with form factors and think I found one that works for me.
NOTE - Now considering the 390HF in 11.5 cu
The problem is the ports. I can't get the velocity and 1st resonance to work.
Either the velocity is too high or the resonance too low.
I am modeling the xmax and power according to Ricci's tests (slightly lower than the 18 measurements he got.)
It shows they can handle my full Crown XS900 which should give them 2200+ w at bridged 4ohn or 2 ohm stereo.
It models really nice except for the port.
The best I can get is:
Option 1:
2 ports --- 8" x 3.23" x 64.27" each
Peak noise --- 28.88ms @ 13.4hz
First resonance --- 105.27 hz
Option 2:
2 ports --- 7" x 3.23" x 55.99" each
Peak noise --- 29.52ms @ 14 hz
First resonance --- 120.83 hz
18 x 18 (approx 16 x 16 internal) x 72 long
Each driver would be on the far ends (6ft apart).
Estimate 9'cu internal
Tune 15hz
4th order HPF at 13 hz
124db at 100hz
121db (f3) at 35hz
118db (f6) at 22hz
114db (f10) at 15hz
Looks perfect for my space and should be very easy to move (MOVE out of a house I mean.)
Can anyone get the port to work?
I've been playing around with form factors and think I found one that works for me.
NOTE - Now considering the 390HF in 11.5 cu
The problem is the ports. I can't get the velocity and 1st resonance to work.
Either the velocity is too high or the resonance too low.
I am modeling the xmax and power according to Ricci's tests (slightly lower than the 18 measurements he got.)
It shows they can handle my full Crown XS900 which should give them 2200+ w at bridged 4ohn or 2 ohm stereo.
It models really nice except for the port.
The best I can get is:
Option 1:
2 ports --- 8" x 3.23" x 64.27" each
Peak noise --- 28.88ms @ 13.4hz
First resonance --- 105.27 hz
Option 2:
2 ports --- 7" x 3.23" x 55.99" each
Peak noise --- 29.52ms @ 14 hz
First resonance --- 120.83 hz
18 x 18 (approx 16 x 16 internal) x 72 long
Each driver would be on the far ends (6ft apart).
Estimate 9'cu internal
Tune 15hz
4th order HPF at 13 hz
124db at 100hz
121db (f3) at 35hz
118db (f6) at 22hz
114db (f10) at 15hz
Looks perfect for my space and should be very easy to move (MOVE out of a house I mean.)
Can anyone get the port to work?