portable compact sub design for iPod - AVS Forum
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post #1 of 23 Old 08-27-2014, 11:20 AM - Thread Starter
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portable compact sub design for iPod

Has anyone played around with the idea of making a very small sub that can be carried around?
I am trying to think of a way to make a portable iPod dock that gets loud and sounds good.
SPL requirements would be 105db from 35-150hz with no more than 200 watts input power.

I am thinking 1.5 cubic feet for the max external size and nothing larger than a 10 inch driver.
Overbuilt sub drivers would not be a good choice because they would weigh too much to be easily carried.
The enclosure needs to be able to be carried easily by one person. 40 pounds is about the most normal folks will want to lug around.

Enclosure design is open sealed, ported, or maybe a some sort of small bass horn.
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post #2 of 23 Old 08-27-2014, 11:27 AM
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E. Martin and eljaycanuck like this.
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post #3 of 23 Old 08-27-2014, 01:15 PM
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How about this: Anarchy Tapped Horn

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post #4 of 23 Old 08-27-2014, 01:43 PM - Thread Starter
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Originally Posted by Bassment View Post
That is quite entertaining! I think we have all messed around with placing our phones is different places to get the most sound out of it. Looking for something a little meatier than this though.
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post #5 of 23 Old 08-27-2014, 01:49 PM - Thread Starter
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Originally Posted by mhutchins View Post
How about this: Anarchy Tapped Horn

This came to mind, would not mind building a few to see how they perform.
Would like the enclosure to be more of a square than than a tall skinny rectangle.
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post #6 of 23 Old 08-27-2014, 01:53 PM
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Does the 40 lb limit include the mains, and amplification, or just the sub?
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post #7 of 23 Old 08-27-2014, 02:08 PM
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Quote:
Originally Posted by jake515 View Post
That is quite entertaining! I think we have all messed around with placing our phones is different places to get the most sound out of it. Looking for something a little meatier than this though.
You could upgrade the cups to glass!!

Haha I'm just kidding around..

you say you want a portable sub, do you also want speakers too? Are you wanting to just hook them up from the 3.5mm jack? Plug in speakers or battery powered?
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post #8 of 23 Old 08-27-2014, 02:27 PM
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Quote:
Originally Posted by jake515 View Post
This came to mind, would not mind building a few to see how they perform.
Would like the enclosure to be more of a square than than a tall skinny rectangle.
Some people seem to like the results of using that driver in a ported enclosure. It may work for your goal.

How are you powering this? AC or DC?
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post #9 of 23 Old 08-27-2014, 03:20 PM - Thread Starter
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Quote:
Originally Posted by Nukem View Post
Does the 40 lb limit include the mains, and amplification, or just the sub?
40 pounds for just the sub.
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post #10 of 23 Old 08-27-2014, 03:27 PM - Thread Starter
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Quote:
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You could upgrade the cups to glass!!

Haha I'm just kidding around..

you say you want a portable sub, do you also want speakers too?

I can build a set of main speakers pretty quick. Lots of good car audio options that could work. Also have some full range drivers leftover from a PE buyout. These 5.25 dual cones that were originally built in those outdoor stone speakers. Not audiophile grade of course but enough to get people into the music and having a good time.

Are you wanting to just hook them up from the 3.5mm jack? Plug in speakers or battery powered?
A 3.5mm jack would be great I have a battery powered amp I can use right now.
Am thinking I could would build a new class D multi channel amp and power it with a wall wart power supply.
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post #11 of 23 Old 08-27-2014, 03:28 PM - Thread Starter
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Quote:
Originally Posted by JohnDean View Post
Some people seem to like the results of using that driver in a ported enclosure. It may work for your goal.

How are you powering this? AC or DC?
AC power for this project. Maybe a battery will be later down the road.
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post #12 of 23 Old 08-27-2014, 06:18 PM
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A sonotube sub would be very light.
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post #13 of 23 Old 08-28-2014, 07:00 AM
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What about something like the diysoundgroup.com Fusion-8 MTM, with another Fusion-8 MTM sized box attached below it with dual 8 "subs? You could put a plate amp or something in the back side, and build it like PA gear with durable paint, 1/2" plywood, rubber corners, and a handle on the top. Something like two of these http://www.parts-express.com/dayton-...oofer--295-484

In total I think it would weigh in around 40-60 lbs and be relatively small. Would probably be one of the best portable boom-boxes ever made haha, but wouldn't be super cheap coming in around $246 plus amplification and wood, but still much less than even a crappy boom-box you could buy, and 100 times the performance.
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post #14 of 23 Old 08-28-2014, 10:35 AM
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Personally, I love that idea, Bassment. The Infinity 860/1060/1260 subs could be options too. The biggest issue I'd think is making sure the sub has the sensitivity/power handling/amplification to keep up with the Fusion8.
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post #15 of 23 Old 08-28-2014, 11:16 AM
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in this size speaker and with the requirements, it's just not feasible to have the subs as capable as the top. You can balance it so it's level matched at all volumes, but at some point the subs will run out of steam while the Fusion 8 easily produces.
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post #16 of 23 Old 08-28-2014, 01:09 PM - Thread Starter
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Quote:
Originally Posted by Bassment View Post
What about something like the diysoundgroup.com Fusion-8 MTM, with another Fusion-8 MTM sized box attached below it with dual 8 "subs? You could put a plate amp or something in the back side, and build it like PA gear with durable paint, 1/2" plywood, rubber corners, and a handle on the top. Something like two of these http://www.parts-express.com/dayton-...oofer--295-484

In total I think it would weigh in around 40-60 lbs and be relatively small. Would probably be one of the best portable boom-boxes ever made haha, but wouldn't be super cheap coming in around $246 plus amplification and wood, but still much less than even a crappy boom-box you could buy, and 100 times the performance.
Basement you got the right idea. Spent all morning checking out the volts 8's and neo driver subs to round out the pkg. the biggest obstacle is weight. The drivers plus the cabinets for the mains are going to come in at about 30 pounds for the two of them, add in subs and portable starts to become questionable.
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post #17 of 23 Old 08-28-2014, 01:15 PM
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I think you could really skimp on the cabinets and build with fairly light wood maybe 3/8 or 1/2" thick. Sure it's not ideal and they might very slightly flex, but you're not going for listening room hi-fi, the very minor (if any at all) sound difference will be worth it to save a few pounds I think.

A Volt-8 on top of a sub would be pretty cool as well. Or two.
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post #18 of 23 Old 08-28-2014, 10:17 PM - Thread Starter
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Originally Posted by Bassment View Post
I think you could really skimp on the cabinets and build with fairly light wood maybe 3/8 or 1/2" thick. Sure it's not ideal and they might very slightly flex, but you're not going for listening room hi-fi, the very minor (if any at all) sound difference will be worth it to save a few pounds I think.

A Volt-8 on top of a sub would be pretty cool as well. Or two.
I like the idea of the volt since it is just one less hole to cut plus the crossovers are easy. Trying to figure out if I can form the enclosure out of plastic. Maybe some PVC pipe would work?? I know HD only sells up to the 4 inch size. I love the efficiency you get with the eminence drivers.
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post #19 of 23 Old 08-28-2014, 10:25 PM
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Lightbulb

You could use something like this to power it...

http://www.parts-express.com/dayton-...ifier--300-771

System Info:
Display - Panasonic TC-P55VT50
Receiver - Onkyo TX-NR809
Blu-Ray Player - Pioneer BDP-320
Front - Pioneer SP-FS51LR (with modified pedestal bases)
Center - Pioneer SP-C21
Surround & Surround Back - Pioneer SP-SS41LR (the 'SS' is for custom boxes)
Subwoofer - Eclipse 88100DVC (x2),...
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post #20 of 23 Old 08-28-2014, 10:42 PM
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Two Volt-8's with the 12"x12" ported baffles, flanking a single 10" sub in a 12"x12" sealed box would look pretty cool .

System Info:
Display - Panasonic TC-P55VT50
Receiver - Onkyo TX-NR809
Blu-Ray Player - Pioneer BDP-320
Front - Pioneer SP-FS51LR (with modified pedestal bases)
Center - Pioneer SP-C21
Surround & Surround Back - Pioneer SP-SS41LR (the 'SS' is for custom boxes)
Subwoofer - Eclipse 88100DVC (x2),...
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post #21 of 23 Old 08-29-2014, 08:23 AM - Thread Starter
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Originally Posted by Philip Frederick View Post
You could use something like this to power it...

http://www.parts-express.com/dayton-...ifier--300-771
I am a little embarrassed by how much time I spend on the PE website, I saw this and the wheels started turning.
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post #22 of 23 Old 08-30-2014, 07:36 AM
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You could use something like the mighy dwarf which will turn a box into a sub
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post #23 of 23 Old 08-30-2014, 07:50 AM
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Perhaps the 6.5" coax driver that Erich has been testing would be a far better way to go as opposed to the Volt-8 as they would be much smaller, lighter, and easier to manipulate. I recall someone posting about the 6.5" coax being a higher end driver with a better mid and top end, so that would be a plus as well, although I am not certain how far Erich has gotten on the 6.5" coax project, or if he is even still planning to do it. You might want to PM him and ask!
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