Which driver in a 26 x 22 x 21 Ported box ? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 11 Old 12-10-2019, 05:25 AM - Thread Starter
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Which driver in a 26 x 22 x 21 Ported box ?

I am looking at these 2 drivers Dayton PA-460 and HSU driver from Parts express. These are the drivers that was recommended to me that would work with my power amp

https://www.parts-express.com/hsu-re...ofer--299-4020
https://www.parts-express.com/dayton...oofer--295-036

Maximum box size, 26 x 22 x 21, I can go smaller, but I cannot go any larger than this.

Edit: with a little adjustment I can go 25.5 x 22 x 24

If this box is too small for the PA-460 (18 inch) will its 15 inch Dayton PA-380, sibling work better?

Amplifier available for use is 625 at 8 ohms or 450 at 4 ohms. Edit: someone ask, if amp specs are correct, yes it is correct. it is a 2 channel amp, 205 wpc, 625 watts / 8 ohms if bridge OR use only 1 channel only which produces 250 watts at 8 ohms or 450 watts at 4 ohms

Setup is a 2 channel HT system, I will be using mini DSP as the main amp and subwoofer power amp has no DSP/crossover functionalities

Last edited by qguy; 12-10-2019 at 07:30 AM.
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post #2 of 11 Old 12-10-2019, 07:03 AM
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5.5 cubic feet is small for the PA460 unless you are tuning around 30hz.

Are you sure those amp specs are correct? Normally you get more power at 4 ohms than you do at 8 ohms.

I’m guessing the budget is tight. How much are you willing to spend?
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post #3 of 11 Old 12-10-2019, 07:24 AM - Thread Starter
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it is a 2 channel amp, 205 wpc / 8 ohms or 300 watts/4 ohms,
625 watts / 8 ohms if bridge
Use only 1 channel only which produces 250 watts at 8 ohms or 450 watts at 4 ohms

Budget 200, but most of the drivers that has been recommended, UM-15, Stereo integrity etc would not work with my amp

I was informed that 95 percent of movie content is 30hz and above and very few would actually contain below 30hz, if chest thumping / tactile response is the target, the PA 460 mated to my box size would be perfect, is this correct ?

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Originally Posted by Samps View Post
5.5 cubic feet is small for the PA460 unless you are tuning around 30hz.

Are you sure those amp specs are correct? Normally you get more power at 4 ohms than you do at 8 ohms.

I’m guessing the budget is tight. How much are you willing to spend?
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post #4 of 11 Old 12-10-2019, 07:31 AM - Thread Starter
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Edit: with a little adjustment I can go 25.5 x 22 x 24, for a slightly larger box
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post #5 of 11 Old 12-10-2019, 07:37 AM
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How about the DIYSG buyout 15: buyout-15-sub

More about it here: eminence-15-subwoofer-and-midbass-information

It's 8 ohm so you could get all 625 watts out of your amp.
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post #6 of 11 Old 12-10-2019, 08:52 AM
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Quote:
Originally Posted by BlueGhost View Post
How about the DIYSG buyout 15: buyout-15-sub



More about it here: eminence-15-subwoofer-and-midbass-information



It's 8 ohm so you could get all 625 watts out of your amp.


Thats a really good option by looking at specs. The efficiency is way lower than the PA460 though.

Definitely worth modeling both.

Chris
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post #7 of 11 Old 12-10-2019, 10:07 AM
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With the bigger box size you get 6.4cuft before driver and port. I had 6.0cuft boxes tuned to 35hz and they were awesome for music and MBMs. I’m not sure what your goal is though? Would you be impressed with these at 30-35hz? Yes. Would you want more in the future? Yes, especially for HT.
If budget is your goal you may want to just keep the tune to the 30-35hz range and think about a UM later to play the lower stuff which I heard the UMs are better at anyways (from 16hz to 35hz) and then blend in your pa460, you can do this easily with a minidsp. If this is going to be your one and only sub you may want to look at the VBSS thread so you can have different tunes.
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post #8 of 11 Old 12-10-2019, 10:23 AM
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Quote:
Originally Posted by qguy View Post
I was informed that 95 percent of movie content is 30hz and above and very few would actually contain below 30hz, if chest thumping / tactile response is the target, the PA 460 mated to my box size would be perfect, is this correct ?
I don't know who stated that misinformation, but likely someone who has never heard a suitably capable home theater that will extend below 30Hz, and/or was attempting to justify their personal selection of a subwoofer that does not extend that low. Most, if not all, movies these days have decent extension to 20Hz. Many of them, mostly action, thriller, and horror movies extend into the low teens with authority and even sometimes into the single digits.

If you build a sub with a tune around 30Hz, you'd need a high pass at or around tuning, leaving ~28Hz and below on the table. Will you be happy with it? Possibly, in fact, probably, if you have never heard a system that extends into the teens. Just don't go listening to anyone's system that has extension to at least 20Hz. It will ruin you and you will be back here looking for ways to decrease your box tuning. Then you will have opened the rabbit hole, and it's a downward spiral from there! Once you taste 20Hz, then you start looking for ways to get to 10Hz, then 5Hz, and so on and so forth.


Don't say you weren't warned!
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post #9 of 11 Old 12-10-2019, 10:45 AM
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Quote:
Originally Posted by qguy View Post

I was informed that 95 percent of movie content is 30hz and above and very few would actually contain below 30hz, if chest thumping / tactile response is the target, the PA 460 mated to my box size would be perfect, is this correct ?

I’d say closer to 90% of content is above 30hz. I wouldn’t say that very few contain content below though, if anything most modern movies do.

The PA will do very well at the chest thumping bass.

Personally, I’d stick with a 20hz-ish tune for theater use.
Two reasons:
First, I’d rather have less spl at 30hz and slightly above than have absolutely nothing below.
Second, If you do decide to go bigger in the future, It will integrate seamlessly with a marty cab or other 20hz tuned design.

As for cabinet size, your size is very close to the VBSS. If you can make that work, you have an already-designed cabinet and recommended eq settings.
The eq will work with different dimensions, as long as you can get the volume the same.

https://www.avsforum.com/forum/155-d...ead.html?amp=1

Chris
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post #10 of 11 Old 12-12-2019, 12:31 PM - Thread Starter
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Will this driver in a proper box with 625 watts be comparable to SVS PB2000 or even an SVS PB13 Ultra ?

Quote:
Originally Posted by BlueGhost View Post
How about the DIYSG buyout 15: buyout-15-sub

More about it here: eminence-15-subwoofer-and-midbass-information

It's 8 ohm so you could get all 625 watts out of your amp.
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post #11 of 11 Old 12-12-2019, 02:32 PM
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Quote:
Originally Posted by qguy View Post
Will this driver in a proper box with 625 watts be comparable to SVS PB2000 or even an SVS PB13 Ultra ?
Post #49 on the HiFi Circuit thread has a good plot of the buyout 15 modeled in a 4 cu ft box tuned to 20 hz. Judging by that, I would say it would best the PB2000 and about equal the PB13 Ultra.
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