Box for Tumult 15D2

[MELKA]

Can anyone suggest a box type/size for Tumult 15D2 MK2? 80/20 % movies/music!

[Exocer]

Hi,
Before we get into that, what are the dimensions of your room and what amp do you plan to use?

[MELKA]

Well the room is about 30 m2 and the amp is Hypex HS500. It gives 795 watts at 4 ohm if i run the Tumults voicecoils in series!

[Exocer]

3ft^3 (91Cm ft^3) would be a nice balance between efficiency and power handling. You wouldn't have to worry about exceeding Xmax, which will ensure great sound quality even up to your amplifier's maximum capabilities.

[Exocer]

Going ported is also an option.



Much larger box, but since your listening habits favor HT, why not get some free output down low from a port?

[Blaser]

15 Hz tune with only 250 L can only be achieved either by too small a port diameter (which will lead to port noise and compression well before the shown SPL graph), or by too long a port which would be unpractical to fit!!

My opinion is to go for minimum a 18 Hz tune and a six" port.

Blaser

[Exocer]

really? a 32" long 6" diameter port doesn't present port air issues until below 20hz...With a precision dual flared port, air velocity may even be lower than suggested graphs. Honestly, I don't see why one wouldn't go with a 15 hz tune but to each his own.

as for length, I guess it would depend on the shape of the enclosure.

[Blaser]

I can find the T/S parameter of adire subs does anyone have a link?

Blaser

[Exocer]

Adire Tumult 15" d2 new
Fs 18.00 Hz
Re 2.80 Ohm
Qms 8.90
Qes 0.41
Sd 736.0 cm2
Vas 188.0 l
Xmax peak 33.00 mm
Le 0.60 mH
Le2 0.00 mH
Re2 0.00 Ohm

[Exocer]

Better yet, heres a link to the location of all the T/S for the recent generation Adire subs.

http://www.acoustic-visions.com/~aco...by_brand.shtml

[Blaser]

Thanks Exocer,

Indeed going higher than 15 Hz would be just for practical reasons, nothing more.... How would you fit a 6" 86 cm long pipe in a 270 Liters box.... It is not only about single dimension (length) but the port needs 6" everywhere around to breath properly. Maybe a sonotube, but in a box I think the tube would have to go past the enclosure.

Moreover, you should change the Qp to 5 (keeping port air velocity never exceed 26 m/s) to have a realistic simulation, keeping things fair. This will show port compression in the SPL graph.

B Rgds
Blaser

[Exocer]

If somehow he could get his hands on a 20" diameter sonotube it could work...I Do however see it pointless now to tune to 15hz...he'll barely get more extension in a 250liter effective enclosure and it will introduce some difficulty in the overall project...but we're not stuck at 250liters either. He doesn't specify size constraints.

But yeah, just throwing a little project idea out there..

[MELKA]

Thanks guys for your knowledge! You helped me very much!

[Blaser]

Knowledge??! Not so much for me. But Exocer is a Great guy What did you decide for the box? When do you get started?

Blaser

[MELKA]

Hi, could anyone calculate box size for Tc-sounds 15" 4ohm DVC? And is 475 watts for it enough?

[Blaser]

Easy, but pls open a new thread to avoid others open threads with the same questions

Blaser

[MELKA]

Sorry about that! I think i go with the sealed box and possibly get Velodynes SMS-1 for it!