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Old 2nd July 2010, 11:16 AM   #1
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Default What enclosure for those subs?

Hi!

I am thinking of ordering a pair of those subs.
I am planning on using the with my coming Mar-Kel70's and having 2 different boxes to get "stereo-bass", if it's something to have at all
If not, it could be just one box.

What box would you recommend? They shall be 100% music, no movie or such. Just pure stereo music.

Niklas
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Old 3rd July 2010, 03:20 PM   #2
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Understandable that you'd like to add some bass.

I'd download winISD, and try modelling different enclosures. There's a lot of discussion on sealed vs vented cabinets. I personally prefer sealed cabinets, for their ability to surpress excursion at really low frequencies. However, vented boxes, while using a larger enclosure, allow you to get more extension from the driver. If you're familiar with both, you can make your own decision.
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Old 3rd July 2010, 04:35 PM   #3
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With Qts high at 0.6+ they will have to go in a sealed box.
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Old 3rd July 2010, 07:57 PM   #4
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Hey,Rullknufs ,
Did u mean two bass box or Stereo image of bass?
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Old 3rd July 2010, 07:58 PM   #5
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I mean one left channel and one right channel of bass. But i don't know how much i gain on that really.
But Dave might work out a box for me. But you are free to come with own examples.
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Old 30th July 2010, 08:45 PM   #6
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Quote:
Originally Posted by richie00boy View Post
With Qts high at 0.6+ they will have to go in a sealed box.
The calculations for sealed box wont be as good as the vented ones. And there's a guy (called SDX) on the swedish forum called Minhembio.com - Mötesplatsen för hembio- och hifi-entusiaster who has bought 12 of these and he says 40-60l vented box and a 3" diameter port.

This is 60l and made to(???) 25hz
Click the image to open in full size.

A 60l sealed box will have a much straighter curve but f3 at ~35hz. I think i want to have f3 atleast a little lower than 30 if it's possible.

By the way, i was thinking of powering those subs (yes, i will have two and build one box for each i think) with the XTZ Sub-Amp 1
XTZ | Sound in balance

I wonder if it's possible to have one left and one right channel of bass with that amplifier. If not i'll stick to one box.
And the sub/-s need to be able to play quite high in frequency, i'd bet. Since i suppose the Mar-Kel70's wont be able to play loud and low in frequency maybe the subs have to go up to 120-150hz or something.

As you see i am totally new to this. What do you think?
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Old 31st July 2010, 02:37 AM   #7
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The assymetrical impedance curve of that driver disturbs me. And the rated SPL looks very low. If you're going to the trouble of building your own sub, I'd suggest using a different driver.
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Old 31st July 2010, 09:57 AM   #8
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Quote:
Originally Posted by Rullknufs View Post
he says 40-60l vented box and a 3" diameter port.

This is 60l and made to(???) 25hz

A 60l sealed box will have a much straighter curve but f3 at ~35hz. I think i want to have f3 atleast a little lower than 30 if it's possible.
You need also to look at the power handling curve. It will show you that the box is far too big for the driver and has very poor power handling around 50-60Hz, which is bad because that is where a lot of bass energy is.

I say again that this driver is not suited to a vented box. You friend may be using them maybe he doesn't have a good benchmark to realise they are not performing that well, or maybe because he is using 12 of them he doesn't notice their deficiencies.
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Old 31st July 2010, 01:31 PM   #9
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Hi Rullknuffs,All

Agree with the last two replies: A better choice would be if choosing the 12" version of RSW-1060, i.e. the RSW-1260 instead, with IMO, having more suitable T/S parameters for a ported box:

b
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Old 31st July 2010, 01:42 PM   #10
sreten is offline sreten  United Kingdom
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Hi,

FWIW two mono boxes placed ~ 1/3 along the back and side wall will
give better more even room drive even though its still mono bass.

/Sreten.
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