Drivers for PVC periscope?

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Hey
Im thinking about building this as a first project;
http://melhuish.org/audio/DIYTQ7.html
itll be used in conjunction with a sonic-T amp, so it needs to be sensitive. And it also needs to be cheap. So what drivers would you recomend for <100 euro. This really is my very first foray into into anything even mildly Hi-Fi, so if anyone has any sugestions for a totally different plan of action for use with the sonic-T It would be most welcome!
Cheers
 
frugal-phile™
Joined 2001
Paid Member
For a 105mm pipe you are probably looking at a 3" driver -- anything larger and you won't really be getting the most from the driver. 3" drivers are not known for their efficiency.

Since the driver Sd is one of the terms in the efficiency equation, the larger the driver the higher the potential efficiency.

I'd recommend a minimum of FE127e type efficiency for a t-amp. More would be better.

dave
 
Okay, so it seems that using the PVC pipe to avoid woodwork is not the way forward, what would you guys think about a set of audio nirvana super 8's from commonsense audio in one of their enclosures as a match for the sonic-t http://www.nirvanaspeakers.com/nirvana.html
Or can anyone gaive me some ideas for a simple horn design that may suit these, or should I go for a horn with these drivers?
At the moment I have a couple of tons of 3/4" plywood at my disposal. The speakers shouldnt be too heavy nor too big and will inebitably be situated in the corners
 
frugal-phile™
Joined 2001
Paid Member
Dancing_Priest said:
At the moment I have a couple of tons of 3/4" plywood at my disposal. The speakers shouldnt be too heavy nor too big and will inebitably be situated in the corners

Small & corners & efficient screams out a set of frugel-horns with FE126e. You'd have to adjust things for 3/4" material but by moving the extra thickness into the voids or the CC you could do it...

http://www.planet10-hifi.com/Frugel-Horn.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=78581

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dave
 
If you want BIB Nirvanas: http://www.zillaspeak.com/BIB-AudiioNirvana.asp

For a small room, the Frugel is likely the better bet, as those 126 drivers have an amazing clarity I gather (mine are on order from Dave as we speak). I think the BIB is at its best with the 6.5in drivers, and might work better for you if you've got a bigger room, where the Frugel might struggle a bit to shift the necessary amounts of air. Assuming you can cope with the height of course -not everyone can. Avoid the Common Sense Audio stuff -it's possible to do better than that IMO.

Best
Scott
 
Oh yes. Dave (Planet10) is a great bloke to do business with -as I say, I've got a pair of his modified 126s on order from him at this very moment. A lot of work is going into the Frugelhorn to make it the very best small horn of its type. As is, it's already supposed to show marked superiority to others, and constant refinements are being made too.
 
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