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Forum: DIY Speakers and Subs   04-28-2017, 08:21 AM
Replies: 494
Views: 21,698
Posted By Ricci
I'm gonna guess the mms is near 900g on this...

I'm gonna guess the mms is near 900g on this dude. Inductance = check...8 or 9dB down at 100Hz. BL^2/Re is the real question.

Get the Smith Larson WT2 not the DATS BTH. You're going to need a lot...
Forum: Subwoofers, Bass, and Transducers   04-27-2017, 02:25 PM
Replies: 3,101
Views: 85,818
Posted By Ricci
I don't have a lot of time to respond with a big...

I don't have a lot of time to respond with a big post but the above post is correct...


LF adjust, or room size, or bass boost, or whatever it is called by each manufacturer, is EQ used to tailor...
Forum: DIY Speakers and Subs   04-19-2017, 08:35 AM
Replies: 182
Views: 7,029
Posted By Ricci
If you look at the coil / gap geometries on the...

If you look at the coil / gap geometries on the B&C woofs you'll see that the coil would leave the gap well before any parts make contact. That and the suspension compliance becoming very tight makes...
Forum: DIY Speakers and Subs   04-14-2017, 04:00 PM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
The MAUL's reside in the warehouse space that we...

The MAUL's reside in the warehouse space that we have band rehearsal in and also that I test subs at outside of. We do a lot of partying and music listening in there too. It's kinda of like using a...
Forum: DIY Speakers and Subs   04-13-2017, 08:32 PM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
Not sure what you mean about a power rating? As...

Not sure what you mean about a power rating? As far as using it as an actual active finished system yes a 6000w Speakerpower module is about right and the most I'd use on one. It will be safe with...
Forum: DIY Speakers and Subs   04-13-2017, 02:25 PM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
Pics would probably be the best way. Used 2" or...

Pics would probably be the best way. Used 2" or 2.5" mattress foam. I forget the density exactly. Staple gunned it to every surface in the vented side that didn't have a driver on it or a port...
Forum: DIY Speakers and Subs   04-13-2017, 11:02 AM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
Dsl1, What amp are you using on yours in the...

Dsl1,
What amp are you using on yours in the living room again? LOL. I doubt you've really let it breathe yet.
Forum: DIY Speakers and Subs   04-13-2017, 10:59 AM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
I thought the group delay was good. Response...

I thought the group delay was good. Response shape is smooth too. All the nasty stuff is way up past 150Hz. Quite well damped.

I should've called it the Clubber Lang cause it hits so hard.
Forum: DIY Speakers and Subs   03-31-2017, 08:39 AM
Replies: 12
Views: 448
Posted By Ricci
Good to see you around Soho54. Maybe like...

Good to see you around Soho54.

Maybe like me you mostly lurk these days? I read pretty regularly but don't post like I used to. I dont really have the energy or time for the long winded debates...
Forum: DIY Speakers and Subs   03-14-2017, 10:19 AM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
I still need the baffle and 4 more of the blocks...

I still need the baffle and 4 more of the blocks if you're willing. Same exact thing should work. Just in case.
Forum: DIY Speakers and Subs   03-13-2017, 01:55 PM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
A bit. I am working on figuring out what high...

A bit. I am working on figuring out what high pass filters to use for each vent configuration and I think I've got the vent blocks sealed up well. I've done some very loose listening tests in my...
Forum: Subwoofers, Bass, and Transducers   03-02-2017, 02:30 PM
Replies: 104
Views: 2,631
Posted By Ricci
Here are a few more examples... The first...

Here are a few more examples...


The first 5 are from an SVS PB13U in 20Hz tuning. These are from a simple adjustment of the low pass filter and that is all. The response that correspond to these...
Forum: Subwoofers, Bass, and Transducers   03-02-2017, 02:17 PM
Replies: 104
Views: 2,631
Posted By Ricci
[/LIST] B is a real example pulled from a...

[/LIST]
B is a real example pulled from a subwoofer I measured. :)
Forum: Subwoofers, Bass, and Transducers   03-01-2017, 02:25 PM
Replies: 104
Views: 2,631
Posted By Ricci
Here are 3 different impulse responses that I...

Here are 3 different impulse responses that I have pulled from the library. They are not labeled as to what subwoofers produced them. If anyone reading along wants to play a game, simply pick an...
Forum: Subwoofers, Bass, and Transducers   03-01-2017, 01:51 PM
Replies: 104
Views: 2,631
Posted By Ricci
Exactly. I originally started to post...

Exactly.


I originally started to post those as a representative of a raw measured impulse response from each system because a few people asked me to even if it is of little direct comparative...
Forum: Subwoofers, Bass, and Transducers   03-01-2017, 08:26 AM
Replies: 104
Views: 2,631
Posted By Ricci
I've been reading a LOT of speculation about...

I've been reading a LOT of speculation about impulse response in subwoofers lately. Some of it in this thread. I may remove them from DB because they cause more confusion than the value they provide....
Forum: DIY Speakers and Subs   03-01-2017, 07:45 AM
Replies: 53
Views: 2,711
Posted By Ricci
I think what Notnyt was trying to say is that if...

I think what Notnyt was trying to say is that if comparing amps / speaker models or specs and trying to determine headroom needs against peak signal specs it's not exactly a direct comparison in most...
Forum: DIY Speakers and Subs   03-01-2017, 07:32 AM
Replies: 182
Views: 7,029
Posted By Ricci
Those are nice looking cabs. Where were these a...

Those are nice looking cabs. Where were these a year ago!? I wouldn't have had to design / build my own vented cabs for DB testing.
Forum: DIY Speakers and Subs   03-01-2017, 07:26 AM
Replies: 14
Views: 408
Posted By Ricci
Rhodesj Can you fit 24x36x36? That's the Othorn...

Rhodesj
Can you fit 24x36x36? That's the Othorn dimensions. It was made for that driver and music down to 25Hz.
Forum: DIY Speakers and Subs   02-28-2017, 03:04 PM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
Pm me an email...

Pm me an email...
Forum: DIY Speakers and Subs   02-24-2017, 09:07 AM
Replies: 290
  SKHorn
Views: 10,531
Posted By Ricci
It ain't going to be THAT testing happening this...

It ain't going to be THAT testing happening this weekend! Looks like rain and chilly anyway. Hopefully I'll be getting impedance measurements and maybe some close mics. See where the tuning came in...
Forum: Subwoofers, Bass, and Transducers   02-24-2017, 09:01 AM
Replies: 104
Views: 2,631
Posted By Ricci
This discussion seems to be based on a...

This discussion seems to be based on a misunderstanding of DSP and what the term means. There seems to be a misconception that a lack of DSP implies that there is no signal processing built in. That...
Forum: DIY Speakers and Subs   02-22-2017, 09:57 AM
Replies: 182
Views: 7,029
Posted By Ricci
Thanks for the measurements Mark. Looks just as...

Thanks for the measurements Mark. Looks just as expected for those drivers in that cab.
+1 on the above. After adding the typical low pass and a high pass that's going to go quite a ways towards...
Forum: Area Home Theater Meets   02-21-2017, 02:30 PM
Replies: 1,385
Views: 35,090
Posted By Ricci
Well I was going to post to clear this up but now...

Well I was going to post to clear this up but now I don't need to. Thanks Mark!:D


Mark is right there is a severe amount of compression in a lot of the CEA-2010 testing. All you have to do is...
Forum: Area Home Theater Meets   02-21-2017, 02:21 PM
Replies: 1,385
Views: 35,090
Posted By Ricci
Finally have time for a quick post. I'll try to...

Finally have time for a quick post. I'll try to add more later.


Thanks to all of the KC area hosts for the hospitality and making the time to hang out with all of us out of towners. Everyone's...
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