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scales11 7th November 2012 06:00 PM

newb compact speaker design help

I am an engineer very familiar with woodworking and electronics but an absolute newb when it comes to speakers. I am building a simple “internet streaming” radio (something like this: MightyOhm Blog Archive Building a Wifi Radio – Part 10, Building the Box) and was contemplating integrating a pair of speakers. Being an engineer, I took one look at his drivers/enclosure, and thought it would sound pretty bad. I want to be sure that mine has some decent sound for stereo music listening.

Knowing very little about speaker design, I figure I would have two internal enclosures/spaces within my overall designated and sealed for only the speakers.

My questions are as follows:
1. I know I need to have a specific volume for a specific driver, can anyone recommend a decent driver that will still allow for a compact design? As compact as can be would be preferable.

2. How compact should I expect to make the speakers, and still get good sound for all around music?

I am not expecting to have the ultimate audiophile setup, but I would like it to sound at least as good as a nice pair of computer speakers. I am also willing to follow some plans, but I did not find many for compact speakers.


sreten 7th November 2012 08:50 PM


Using computer speakers or active speakers is not a bad idea.

Gutting computer speakers for the bits can be cheaper.

However : The Madisound Speaker Store

in 2L to 3L with a 4 ohm t -amp would work well with some line level EQ.

rgds, sreten.

scales11 7th November 2012 11:51 PM

Thanks sreten.

I have been browsing around a little and seen a couple builds that use this driver: HiVi B3S 3"
HiVi B3S 3" Shielded Aluminum Driver Square Frame 297-427

I am still searching for its ideal enclosure volume, but wondered if there was another driver that would perform well with a cavity closer to 1L.

Anything come to mind?

mikejennens 8th November 2012 12:08 AM

Here is a design by a Parts Express Tech Talk member. I believe it's right about at the 1 liter mark.
PC pictures by wolf_teeth_speaker - Photobucket


scales11 8th November 2012 12:12 AM


Thanks, I think I could manage a volume of 1L or a little more (in my efforts to keep the overall design compact. The drivers in that picture look a little different than the 3" I mentioned, notice the mounting brackets....?

mikejennens 8th November 2012 12:44 AM

Member Wolf_Teeth on DIY Audio is the individual who designed these and can answer any questions. He's EXTREMELY knowledgeable about "speaker stuff." He is also Wolf on the Parts Express Tech Talk (PETT) forum. Great guy and very helpful. I don't know how often he's on this forum, but he's on the PETT forum quite a bit. If you message him, he'll probably answer your questions and maybe have some other ideas.
There are some nice small builds with the Hi Vi 3" driver, but I don't know of any that are in the 1 liter area.

scales11 8th November 2012 12:54 PM

Thanks mikje, DONE!

scales11 9th November 2012 02:39 AM

so just to make sure my math is correct and I am reading this right....

For those HiVis I mentioned (HiVi B3S 3" Shielded Aluminum Driver Square Frame 297-427)

I just need to get at least 0.04 ft^3 (70 cubic inches) of volume behind them and they should sound good?

So I can put them in a box that is say...4"x5"x5" and be ok?

scales11 12th November 2012 07:44 PM

Anyone know the answer for this?

bobfig 12th November 2012 08:02 PM

this is what i did with the Aurasound NS3-193-4A a while back.

[Project} Home Built TV Speakers

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