4ohm drivers?

Was in the pub chatting to a mate last night and I've been asked to knock up a box that will fit the back of a tricycle. Dimensions are about 55cm wide by 30/35cm deep and 60cm high max, although the shorter the better. Initial plan is a 3-way stereo, 2 bass and 2 mids in a box and a couple of CD/tweeters on a pole.

If I'm using 12V TA2020's in 4 ohm and want to stay stereo, is the best option buying 4ohm drivers? Whether 2 or 3-way, the only way I can think is to use one amp per stereo pair and choose 4 ohm drivers.

I can't find many decent PA speakers that are 4 ohm. Due to size I'm limited to a pair of 8" max as the width between the two rear wheels can't be more than 55cm or 21" which is too much of squeeze to fit two 10" (Could use one 10" in mono for the bass and two 8" for the mids).

I've checked the Monocor/Stage Line 4ohm HiFi range, with the SP-202E, with an Fs of 42Hz and an SPL 94db. Maybe my best option? Had thought four of these, a pair each for bass and mids?

The other options are to use 8 ohm drivers in parallel for the bass and tops, in mono on a channel each. It would mean I'd only require two amps, but would only get a stereo sound from the two mids. How much difference in the quality of the sound is lost by the tops being in mono?

Cheers!

if you manage to squeeze two 10 inches then eminence basslite... nice lightweight and efficient driver
http://www.bluearan.co.uk/index.php?id=EMIS2010

car audio speakers waste of time, rarely go above 90db :(

joegrind75 wrote: I did begin with the Boominator as an option, but my mate didn't fancy it, because it was going to be used in his shop when not on the tricycle, and he wanted the drivers facing the same way.

That's just lack of knowledge and ignorance. He can still use it in his shop. Distance to the wall just have to be around 15-20cm or more if possible. He also have to turn down the bass between 100hz and 200hz by 3-6dB if possible. The Boominator is designed for outdoors use and have an integrated bass lift in that area for that purpose.

Nothing prevent you from putting midrange/tweeter horns on poles etc. All I'm saying is use the extreme efficiency and compact size of the Boominator to make the bass/mid section. It is after all 4x 10" drivers in a very compact cabinet.

Remember that the Boominator is a concept design. You can follow it as closely as you want. You will however get the best result if you use the exact drivers and cabinet volume as suggested and have drivers on both sides.

But I take your point and won't comment or advice any further.

Edited by Saturnus - 04 March 2013 at 1:04pm

really?...... i say talk him out of stereo. if its for advertisement stereo imaging will be wasted on people that dont care that much or passers buy or WONT stop and go "... if you stand just here, you can really get a feel for the way the band has set up this track..." not realy gonna happen is it?