I am thinking to move up from my current Infinity TSS-SUB4000-it's good but I would like to sell that off with the rest of the TSS system it came with. Plus I'd like to go lower
Infinity TSS-4000 Speaker System HT Labs Measures | Sound & Vision
and have a more effortless high volume.
One way to do this is to buy another sub, but I feel more interested to build something. The sub location is in the corner of a long room behind where a French door opens, hence a trapezoidal shape:
- About 7' tall
- 22" along the front wall which has TV and three Wharfedale Diamond 11.4
- 14" along the side wall, to the hinges of the French door
- 8" at the other side of the trapezoid, so the French door can be open some
- About 23" along the "hypotenuse" or long face of the trapezoid.
Yeah, a picture is better. Let's see if this one works
With the woofers facing outwards, it's about 8 cubic feet. If I face the woofers inwards into a tapered slot, somewhat less. The advantage is both acoustic (not firing into the glass panels of the French door) and aesthetic (don't see the woofer cones, I can decorate the side or something).
(1) To port or not to port, that is the question. I'm feeling it will be tricky to calculate and physically put the ports...I guess they would have to fire out the narrow end, which is not so attractive. Or make a long slot port. It would be cool with sealed to pump in like 3 Hz or something and rattle the house ha ha-then again it's nice to have the output bump from porting. What do you think?
(2) What woofers? A wall of 10s? Twin 18s? 12s or 15s? Why? Here I'll specify the total budget for woofers as hundreds, not thousands.
(2b) And this choice affects the internal cabinet construction, since you don't want different channels driving woofers in common enclosures.
(3) Amp also hundreds not thousands. Maybe a Crown or Behringer? Fan is OK only if it does not normally come on.
(4) In the Middle Ages, I used LMS for measuring parameters and LEAP for simulation. What is used these days? (Ideally that is NOT just based on simple electrical filter calculations, i.e. which can take actual data and simulate the true rolloff shape. That's probably more important for ported). I still have a LEAP port key but nothing to run it on.
(5) If I slot load, how big should the slot opening be? I have 3.14159" in mind but that is because I'm craving pecan pie ;-D. I suppose it can be calculate as cone displacement transformed to slot area, then multiply the air velocity at the woofer by the same factor?
Infinity TSS-4000 Speaker System HT Labs Measures | Sound & Vision
and have a more effortless high volume.
One way to do this is to buy another sub, but I feel more interested to build something. The sub location is in the corner of a long room behind where a French door opens, hence a trapezoidal shape:
- About 7' tall
- 22" along the front wall which has TV and three Wharfedale Diamond 11.4
- 14" along the side wall, to the hinges of the French door
- 8" at the other side of the trapezoid, so the French door can be open some
- About 23" along the "hypotenuse" or long face of the trapezoid.
Yeah, a picture is better. Let's see if this one works
With the woofers facing outwards, it's about 8 cubic feet. If I face the woofers inwards into a tapered slot, somewhat less. The advantage is both acoustic (not firing into the glass panels of the French door) and aesthetic (don't see the woofer cones, I can decorate the side or something).
(1) To port or not to port, that is the question. I'm feeling it will be tricky to calculate and physically put the ports...I guess they would have to fire out the narrow end, which is not so attractive. Or make a long slot port. It would be cool with sealed to pump in like 3 Hz or something and rattle the house ha ha-then again it's nice to have the output bump from porting. What do you think?
(2) What woofers? A wall of 10s? Twin 18s? 12s or 15s? Why? Here I'll specify the total budget for woofers as hundreds, not thousands.
(2b) And this choice affects the internal cabinet construction, since you don't want different channels driving woofers in common enclosures.
(3) Amp also hundreds not thousands. Maybe a Crown or Behringer? Fan is OK only if it does not normally come on.
(4) In the Middle Ages, I used LMS for measuring parameters and LEAP for simulation. What is used these days? (Ideally that is NOT just based on simple electrical filter calculations, i.e. which can take actual data and simulate the true rolloff shape. That's probably more important for ported). I still have a LEAP port key but nothing to run it on.
(5) If I slot load, how big should the slot opening be? I have 3.14159" in mind but that is because I'm craving pecan pie ;-D. I suppose it can be calculate as cone displacement transformed to slot area, then multiply the air velocity at the woofer by the same factor?
"What to do with 8 cubic feet?"
Recalculate to standardized international units for instance. International forum...
Recalculate to standardized international units for instance. International forum...
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That space could hold 2 12" SB34NRX75-6 drivers on each side in a sealed enclosure. That would give a response (not counting room gain) to 27Hz (F6) and with subs on both sides easely hit 110dB without going over xmax.
2 Dayton UM12-22's a side goes a little lower in the same space sealed, about F6 of 25Hz and due to more xmax max volume of 116dB at that F6. But the driver is (at least here in the EU) 150% of the price of the SB34.
And many more options are availeble, but that would be what i would do probally...
2 Dayton UM12-22's a side goes a little lower in the same space sealed, about F6 of 25Hz and due to more xmax max volume of 116dB at that F6. But the driver is (at least here in the EU) 150% of the price of the SB34.
And many more options are availeble, but that would be what i would do probally...
Ugh, you know, I thought of that actually...but usually see posts in cubic feet. Maybe this forum is more international than others.
Yes, about 227 liters, if a moderator can add to title so appreciated
Given that subwoofers work much better if you ave 2 or more, 8 ft3 = 226 litres gives 4 off 56 litre sealed push-push woofers with CSS SDX10.
dave
dave
I have a pair of Infinity 1262w in sealed 1.5cf cubes. If I had the ability to get more I would do it. Great bang for the buck. With DSP they really shine. Not sure what is comparable these days, but it's a viable option if suitable drivers are out there.
I have 8cubic foot boxes myself and will be getting some JBL 2245 in them when they're here. That was my first inclination, but they're NLA and you may find better candidates. The 8cuft is nice to have though.
I have 8cubic foot boxes myself and will be getting some JBL 2245 in them when they're here. That was my first inclination, but they're NLA and you may find better candidates. The 8cuft is nice to have though.