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jay michael

Best option for high impact home stereo subs in a small-ish room.

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8 hours ago, SME said:

Oh, I forgot about the VBSS, and when I was looking at vented PA460s, I was looking at the outcome of using 2 x PA460s in a single small vented box.  No wonder it didn't work.

If you don't mind the size and footprint, VBSS may be a great way to go.  Four of them at the 20 Hz tune will probably handle just about anything you throw at them, and they don't need much power at all.

Yeah the more I dig into the vbss it looks better and better. It will be more cabs and more space but they are just silly cheap to build, 4 cabs would run me about 850 bucks Canadian. I'm sure my wife would be fine with a row of 18's in the living room haha!   Still going to see what diysg has cooking with their new 18 cab when they add it to the website sometime this week. Its going to be more money but will have better drivers for sure.  He said the kit its going to cost just slightly more than the 15 as the driver has a ceramic magnet vs the neo in the 15.  A pair landed in Canada should be around 800 my dollars, plus some ply to finish them off.

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Yes, the 6mm is supposed rated super conservatively.

I've read so much conflicting information from ported to sealed, etc. It seemed that sealed is the no-brainer decision via bassthathz if you are going to buy more than 2 pa460s... Trying to find alternatives to that evidence... 

 

 

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13 minutes ago, kipman725 said:

Looking at the VBSS thread it looks like the xmax specified for the PA460 is geometric and so the usable excursion is a bit greater than specified:

https://www.avsforum.com/forum/155-diy-speakers-subs/2226642-v-b-s-s-diy-subwoofer-design-thread.html

 

Yeah I noticed that as well, usable may be around 11mm. Seems to be pretty decent and capable driver for what it is.  The price is just insane. A guy could likely build 10 cabs for about 2000 my dollars.

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I got an email back from DIYSG. The custom driver coming with their soon to be released 18" kits is based on this driver, but modified in some ways custom for their application. To early to tell as we don't know what changes were made, but what do you think about this driver as a starting point?

https://qcomponents.ca/Eminence-KAPPA-PRO-18LF-8.html

Based on the evolution of their offerings, the mbm-12 and 15, I imagine the 18 should be pretty similar to the vbss just with a better driver.  From what I can tell the same guy has developed all of them.

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Thought I should update this thread as I went ahead and built a pair of VBSS subs to live with my Danleys.  The hype is real, these are fantastic sounding subs considering their inexpensive cost to build. They wont crack the stucco on my ceiling like the Skrams did, but for listening to music at moderately loud listening levels I couldn't have wished for a better outcome. Thanks for the help everyone, the project was a success! And I didn't blow a bunch of money I didn't need to spend in these strange times.

Aesthetically I think they make for a great match with the Danley's as well.

https://imgur.com/gallery/R1JSs05

 

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4 hours ago, jay michael said:

Thought I should update this thread as I went ahead and built a pair of VBSS subs to live with my Danleys.  The hype is real, these are fantastic sounding subs considering their inexpensive cost to build. They wont crack the stucco on my ceiling like the Skrams did, but for listening to music at moderately loud listening levels I couldn't have wished for a better outcome. Thanks for the help everyone, the project was a success! And I didn't blow a bunch of money I didn't need to spend in these strange times.

Aesthetically I think they make for a great match with the Danley's as well.

https://imgur.com/gallery/R1JSs05

 

Looking good. Is that the 15hz slot design? 

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7 hours ago, jay michael said:

Thought I should update this thread as I went ahead and built a pair of VBSS subs to live with my Danleys.  The hype is real, these are fantastic sounding subs considering their inexpensive cost to build. They wont crack the stucco on my ceiling like the Skrams did, but for listening to music at moderately loud listening levels I couldn't have wished for a better outcome. Thanks for the help everyone, the project was a success! And I didn't blow a bunch of money I didn't need to spend in these strange times.

Aesthetically I think they make for a great match with the Danley's as well.

https://imgur.com/gallery/R1JSs05

 

Looks nice! I bet they sound fantastic!

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On 7/14/2020 at 5:20 PM, klipsch said:

Looking good. Is that the 15hz slot design? 

I used the 31hz slot design configuration. If I stuff one side of the vent closed it tunes to 22hz.  In my experimenting I much preferred leaving both ports open.  There is still usable output down to about 27ish hz. 

 

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I'm actually heading to our local makerspace woodshop this weekend to cut up panels for another 4 of these.  I gave a couple of my music nerdy friends a demo and they immediately asked me to build pairs for them. For less than 1k Canadian you can build a pair with a berry nu3k included in the price.  Unreal value for the dollar.   

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Glad these are a hit.  Spread the bass!  :)

Have you done any measurements in the room yet?  A rudimentary standing wave calculation suggests you're likely to see a significant standing wave resonance at around 31.5 Hz (18 feet).  Taming that a bit with some EQ could improve the sound quality further and might also make the lower extension mode sound better.

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