combining 2-2" cd for high SPL

Is there a way?
 

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PA, live band, been using Community SLS920 for years love the SPL only problem it's weight 70 Lbs, hard to lift on stand by myself.
I am looking to build something similar but on a diet <60lbs. SPL and weight are the main criteria. Thanks
1hiep0,

You could reduce weight below 60 pounds, gain some coherency and equal or increase output using either a multiple entry or coaxial horn design using neodymium drivers.
It would be an expensive and time consuming project to complete, though could improve sound quality if well executed.

Or you could put the SLS920 on the stand while laying on it's side, then stand it up- much easier than lifting on to the stand by yourself.

Art
 
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1hiep0,

You could reduce weight below 60 pounds, gain some coherency and equal or increase output using either a multiple entry or coaxial horn design using neodymium drivers.
It would be an expensive and time consuming project to complete, though could improve sound quality if well executed.
I was thinking about doing a MEH project but don't have the time because of its complexity and hard to get it to work right .

By the way I have the drivers to do your SyncTripp but could not get started yet .

Or you could put the SLS920 on the stand while laying on it's side, then stand it up- much easier than lifting on to the stand by yourself.
I was trying to do that, being an old guy (low 60:sad:) it's tough, at the end of the gig it's feel like it's not 70lbs.
 
I love the weight of your SynTripP could it be modified to add 4 celestion mids while keeping the same dimension?
And use this as a guide?

quote:
I'd just use the same dimensions that Danley uses:

Midrange taps are 3/4" in diam, 3.5" from throat

Woofer taps are 2.5" in diam, 10.5" from throat

Woofer ports are 2.5" in diam, 14.5" from throat
 
I love the weight of your SynTripP could it be modified to add 4 celestion mids while keeping the same dimension?
The SynTripP is a two way design, using 10" lows and a 1.4" exit, 3" diaphragm high driver. Free space peak output is around 122 dB at one meter in the 80-160Hz range, with more headroom above that range.
Moving the 10" forward towards the horn mouth, and adding two or four small cone mid drivers would be possible with the same cabinet dimension, but then the mid/high end above around 400 Hz would out-run the bottom by around 6 dB.
Extra complexity, weight, with no net output gain, unless you happen to want a lot more upper mid-range than low end, or are really concerned with reduced upper distortion.

Midrange and woofer entry points, dimensions and depths are determined by a number of factors, your "guide" would apply loosely to one geometry and driver set.
 
A simpler and lighter approach to reach the ballpark output of the Community SLS920 would be to to use a good neodymium 12"/3" diaphragm coaxial driver with a short bass horn, like the DSL SM80. Port the cabinet if more output is needed below around 200 Hz.


diyAudio Member

Join Date: Jan 2018
Hi sir weltersys, can we use CDdriver that have a 2"exit throat in your SytripP instead of 1.4"?thanks
 
Increasing the throat size to 2" would require reducing the horn depth, depending on the driver there may not be enough room between the horn and the back to fit without also extending the cabinet depth. Alternately, the horn angles could all be adjusted slightly to make the horn/driver fit the cabinet depth.