High efficiency hi-fi speakers, DIY suggestions?

[justin.kerr]

thxgoon wrote:

If that is the case you have got to post some pics of your system. Only one I can think of could maybe come close and that's the old Polk SRT system.. Like WmAx said, you won't be rocking at those levels for long.

The SRT system was a line array btw...

I have posted pictures, 8 18's in a small room produce a decent amount of spl. My mids and highs are around 10 db under the bass.. for now.

[Pirium]

thylantyr wrote:

It won't take much from a DIY point of view to have great sound. You probably don't need
a high sensitivity design to meet your goals. Take a good DIY design and connect it to a generous
power amplifier and you are doing well. Klipsch isn't going to put high end drivers in their commercial
speakers. Most likely, they use $1 dollar tweeters mated to a horn lense to give it the SPL because
the driver itself it weak.



If you wanted a good high sensitivity loudspeaker, some ideas are given in that link. Did you read it?

Of course I did. Gave me a lot of Ideas, but I'd like to be able to use the same drivers in a center speaker as well, so I'd really like a dual 8" or 6" plus tweeter design.

thylantyr wrote:

As already mentioned, everyone has different SPL goals. Someone like me with high SPL, high SQ
as my main goal, won't use the conventional high quality drivers seen in the common DIY loudspeaker.
The only exception is when you make a proper line array as you can have ordinary drivers in
an array and not drive them to audible distortion, but the array 'effect' can boosts the SPL level
with proper design of course.



There are prerequisites to DIY.. Time, money, and you need to know what you want and analyze
designs to determine if they get you there. If you are just a casual listener who loves higher
SPL audio and auditioned the Klipsch and found them to be what you want, then just buy it
in spite that it cost a lot of money. For one, you can't audition a DIY speaker unless you plan to
take trips to people's homes. A DIY design unheard, is considered gambling. You have faith that
the design will satisfy, but there is no guarantees. Do you want to gamble or play it safe ?

I've gambled and won before, why not gamble once more?


What about something like two of these in paralell; http://www.mamut.net/dynabel/peerles...5_-_830868.pdf

Or it's phaseplugged brother: http://www.mamut.net/dynabel/peerles...5_-_830884.pdf

with this tweeter:http://www.madisound.com/catalog/PDF/neocd2.pdf

Could that be a good startingpoint,and why/not?

[Geoff St. Germain]

I didn't see this one posted, but it hits 95 dB/2.8 V.

http://www.troelsgravesen.dk/JA8008.htm

[Pirium]

That one is really interesting. When he comes up with a matching 10-12'' and filter for the double horn, I think this could be what I'm looking for. I tried to follow all the links,but still haven't found anyone actually selling this kit..?

[zamboniman]

DS-21
You mentioned having a crossover design for the B&C coax a few posts back. Would you be willing to share that?

Thanks

[ajaxmike]

Have a look at hempacoustics.com. High efficiency full range drivers with enclosure plans available on the net. Dealers in Germany and Netherlands.

Mike

[kouack]

justin.kerr wrote:

I have Klipsch Rf 83's, and I don't think it would be very hard to build speakers that would match them for output/sound quality.
I am also looking for a 5.0 set up. With high sensitivy, and high power handling, coupled with great sound. What I am looking for is around 102db-106db for sensitivity, and around 4,000 watts continous power handling per speaker. But it looks like the cost of just the drivers will be around $3,000. per speaker...

Continuous 4000 watts speakers are you planing to gig or build a movie theater ? this is good for a 4000 watts amp IE Crown Itech 4000 bridged on a speaker

[kouack]

Quote `Very true, it's not common to see someone producing 125dB - 130dB of mid/treble in their home.
It's one of my goals, I have collected drivers for this. It will be a line array and no horns. The midbass
will probably do 140dB. This is a rough estimate of course.

140db according to this calculator http://www.crownaudio.com/apps_htm/d...ct-pwr-req.htm we are talking about 20k watts at 6 feet from the speakers with a headroom of 3 db and 106 db/watts speaker.

[Synthsayer]

Check out this thres if you want to find some good info on high efficiency drivers and systems.
http://www.hometheatershack.com/foru...-new-post.html
In my humlbe opinion horns and compression drivers give you dynamics and efficiency that no high power amps and dynamic cone and dome systems can achieve.
I don't mean to antagonize anybody so please do not take this posting as an insult to the very nice systems I see mentioned here :-)
Peace