The XSD Speaker

Founder of XSA-Labs
Joined 2012
Paid Member
Years ago I built a foamcore tractrix horn and put the PRV 5MR450NDY at the throat. I was doing the usual sweeps to measure response with a mic and REW. After I was done (and I typically do sweeps at 2vrms), I noticed my ears were ringing. It turns out the 10dB horn gain and 95dB native sensitivity hanged up to mean that the sweeps were 100dB+ but it didn’t “sound loud” because the driver was moving maybe 40um - so no distortion. I wear earplugs now when measuring horns.
 
Hello xrk971 I've read al the XSD speaker posts , congratulations for the project.
I've print years ago the Pass pages about slotted and I've recently foud the prints. I liked the project Linkwitz LX521 but is too expensive for me.
I find your idea brilliant. Do you think even if I'm not an electronic technician, can I try to make it?
I have a pair of old naim SBL speakers and would like to upgrade.

Fabio
 
Founder of XSA-Labs
Joined 2012
Paid Member
Hi Fabio,
Thanks for the kind words. You don’t need any electronics expertise to build this, it is mostly woodworking and not that complicated. The crossover parts are from a kit (which has just ran out so I’ll need to do another group buy if more people are interested) and has a XO PCB offered by Bloqhed, so the task is to build the cabinet, install the drivers and connect wires.

The difficulty at this point is the midrange driver being out of stock. I am waiting for some cabinets to develop the crossover for an alternate midrange driver.
 
Faital Pro M5N8-80 is listed on USSpeaker for $24 less each than on PE or Amazon. PE shows not in stock.

B&C 6MD38 is $37 less than the lowest price I found the FP M5N8080 on several sites.

Of course price is not the most critical aspect to consider but nice if can save a bit and do the job needed but if one must spend more then worth it.

None of these are insanely expensive anyway. I have been pleasantly suprised by some rather low cost drivers, quite disapointed in some high priced ones and blown away but some that were crazy expensive but in the time I used them they were worth it, sold them soon after they did what I needed them to do.
 
xrk971,
thanks, I will try to build this project.
At the moment I wait for the new midrange, in italy is easy find B&C 6MD38 €90 and Faital M5N8-80 €128, Faital PRo FE300 € 90 .
The second step is buy woofers and build the cabinet. I don't know if I have lost the information, where can I find the info for the cabinet?

Fabio