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High(er) Efficiency System From Scratch
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Blaize110 View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Blaize110 Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2012 at 9:29pm
Yeah, I was just checking that you knew that it needed 24V, I used to cart about 2 batteries but if this power supply works then I should be able to boost 12V to 30V for the amp :)

PS: Any thoughts on the best mid-top arrangement to sit above the 2 x 12" bass?:

 - 8" in horn(ish) and 1" Compression Driver
 - 2 x 8" in Sealed box and 1" Compression driver
 - 2" Compression Driver and 1" Compression Driver or Tweeter

PPS: Perhaps someone could give me an idea of what I am looking for in a good plot, tuning and volume for the bass cab?


Edited by Blaize110 - 18 January 2012 at 9:45pm
Rory - http://www.cheltenham-disco.co.uk
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Edd Jordan View Drop Down
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Points: 782 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Edd Jordan Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2012 at 9:56pm
dual 6.5 or 8 inch tops in a ported box i think should do you well. tis going to be a large system for 12v whats your budget roughly? you could have a spanking system if you got some really efficient drivers. and thats alot of system to run of one Battery how big is it? 

what bassbin design are you going to use?
I do a sideline in ply wood wheels.
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infrasound View Drop Down
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Points: 1244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote infrasound Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2012 at 10:08pm
Single 15" BPH, with 8" on a straight horn + 1"

Thats what you want Thumbs Up
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infrasound View Drop Down
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Points: 1244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote infrasound Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2012 at 10:09pm
Or 12" bph + 6" horn + 1"
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davey t View Drop Down
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Points: 1239 		Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2012 at 11:19pm
do the math. take the spl from the drivers and try different arrangements with the size cab you want using say 1x15", 2X12" or 3x10" taking into consideration the power output of the amp at those loads

by pa horns i meant the mid horns that are used for public announcement. skytronic and monacor make them.

don't use horn subs on their own, you get much better results with more drivers in smaller reflex boxes.

If you are just using the sure 4x100w amp then go for smaller drivers with low power ratins as that amp is only really 40-50w a channel at 4 ohms.
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Davey T: Electronics and audio engineering, PASCE Ltd
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Blaize110 View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Blaize110 Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2012 at 7:59am
Quote
Single 15" BPH, with 8" on a straight horn + 1"
Unfortunately that doesn't really fit too well with the 4 channels on the amp. I have also never built a speaker before so was thinking that a reflex would be a bit easier to start with.

Originally posted by Edd Jordan Edd Jordan wrote:

dual 6.5 or 8 inch tops in a ported box i think should do you well. tis going to be a large system for 12v whats your budget roughly? you could have a spanking system if you got some really efficient drivers. and thats alot of system to run of one Battery how big is it? 

what bassbin design are you going to use?

Hmm, ok. I wasnt sure if a ported or sealed box would work best, but I will have a go at some simulations. Just seen your new system too, certainly looks interesting.

Yes this does seem quite large, I think I might be getting slightly ahead of myself so am going to go back and look at the fundamental cost of it all before I actually start anything. My budget is flexible but I would certainly like to keep it down where possible.

As for the battery, I have a 70-80Ah battery I was planning on using.




Edited by Blaize110 - 19 January 2012 at 8:05am
Rory - http://www.cheltenham-disco.co.uk
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Blaize110 View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Blaize110 Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2012 at 3:32pm
Been doing some simulations on HornResp and BassBox and seem to have got to some fairly decent results. So will be starting building the bass cab as soon as I can sort out where i'm getting the ply-wood from.

I've also had a play with Sketchup and have managed to produce a rough representation of what I hope to finally make:
Rory - http://www.cheltenham-disco.co.uk
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