Hi chris661,
Post #18: "...Has anyone tried a slot-loaded ported box instead?..."
Are you talking about a bassreflex as in Post #9?
Regards,
Post #18: "...Has anyone tried a slot-loaded ported box instead?..."
Are you talking about a bassreflex as in Post #9?
Regards,
Almost. I was thinking of taking the 6th order BP and shrinking the high-tuned chamber until its just a driver firing through an aperture, like this:
You could even put the magnet right by the slot for additional ventilation.
The slot often gives a boost at the top end of the sub's frequency band, similar to a 6th order BP, but here, volume is minimised.
Chris
You could even put the magnet right by the slot for additional ventilation.
The slot often gives a boost at the top end of the sub's frequency band, similar to a 6th order BP, but here, volume is minimised.
Chris
Hi chris661,
The dbTechnologies Sub 12D. Interesting, how much of the performance is because of the built-in DSP/dual limiters? I messed a little w/ what I call an "Open BP4" (sealed box w/ stub?, ends up @ Vnet_51.5L, ~ -6dB @ 35Hz, don't know if this will work as simulated). When I find time I'll look @ the "Slot-loaded BP6".
Regards,
The dbTechnologies Sub 12D. Interesting, how much of the performance is because of the built-in DSP/dual limiters? I messed a little w/ what I call an "Open BP4" (sealed box w/ stub?, ends up @ Vnet_51.5L, ~ -6dB @ 35Hz, don't know if this will work as simulated). When I find time I'll look @ the "Slot-loaded BP6".
Regards,
Attachments
Karlson coupler?
Hi
Anybody has an idea if a box with three chambers like this would work ?
1. chamber: Karlson coupler
2. chamber: basreflex
3. chamber: Karlson coupler
And one of the woofers in each wall of the two walls between the three chambers. In push/pull so the forces cancel each other.
Or do I have misunderstood the Karlson coupler?
Best regards
Uwe
Hi
Anybody has an idea if a box with three chambers like this would work ?
1. chamber: Karlson coupler
2. chamber: basreflex
3. chamber: Karlson coupler
And one of the woofers in each wall of the two walls between the three chambers. In push/pull so the forces cancel each other.
Or do I have misunderstood the Karlson coupler?
Best regards
Uwe
Triple chamber bandpass
Hi
If the size of the sub ( and hense also the weigth ) of the sub with one woofer will be only around 70 liters, I was thinking what about a Triple chamber bandpass. With two woofers in push pull.
The advantage would be force cancellation / impulse cancellation, a good thing if the sub is a leigthweigth PA-style build.
best regards
Uwe
Hi
If the size of the sub ( and hense also the weigth ) of the sub with one woofer will be only around 70 liters, I was thinking what about a Triple chamber bandpass. With two woofers in push pull.
The advantage would be force cancellation / impulse cancellation, a good thing if the sub is a leigthweigth PA-style build.
best regards
Uwe
Boxsim simulation
Hi
Tried to simulate a bandpass sub in Boxsim (Visaton).
One woofer
Vfront 20 l
Tube(front) 65 Hz
Vback 27 l
Tube(back) 35 Hz
The frequency response does not look like your sims.
best regards
Uwe
Hi
Tried to simulate a bandpass sub in Boxsim (Visaton).
One woofer
Vfront 20 l
Tube(front) 65 Hz
Vback 27 l
Tube(back) 35 Hz
The frequency response does not look like your sims.
best regards
Uwe
Wavecor vs BMS
Hi
I built the sub as a normal ported box, the port is a little special though, app. 60 liters.
Put the Wavecor in and guees what, plenty of bas. They move a lot of air. Wich worried me a little bit, so to sleep better at night I bought one BMS 12N630 and put that in.
Also that had plenty of bas.
Now yesterday I tried to compare them a little bit.
BMS is more efficient, plays down to 45 Hz.
Wavecor needs more power, plays down to somewhere between 34 and 31 Hz.
So conclusion so far, it is a shame the wavecor does not have a 3 or 4 inch high power voicecoil.
I gues it will depend on how big a gig I have wich ones I will bring along.
Wood is not that expensive so the plan is to build 6 cabs, and buy one more BMS. This way I can choose between 2, 4 or 6 subwoofers to the gig.
Best regards
Uwe
Hi
I built the sub as a normal ported box, the port is a little special though, app. 60 liters.
Put the Wavecor in and guees what, plenty of bas. They move a lot of air. Wich worried me a little bit, so to sleep better at night I bought one BMS 12N630 and put that in.
Also that had plenty of bas.
Now yesterday I tried to compare them a little bit.
BMS is more efficient, plays down to 45 Hz.
Wavecor needs more power, plays down to somewhere between 34 and 31 Hz.
So conclusion so far, it is a shame the wavecor does not have a 3 or 4 inch high power voicecoil.
I gues it will depend on how big a gig I have wich ones I will bring along.
Wood is not that expensive so the plan is to build 6 cabs, and buy one more BMS. This way I can choose between 2, 4 or 6 subwoofers to the gig.
Best regards
Uwe
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