Dylan Matlow

Thanks! This parts sourcing is the rough part...

I have no idea... A nice fairly shallow mount high excursion 8" midwoofer is fairly down the list of priorities but atleat is made it on the list... The delta will be out before the omega since they are having problems making the omega

That is the next generation of the prototype, I haven't had any problems with lead slap so far haha The Xmax went up a bit from the last go around, the coil *should* be centered better now. We moved to an external Neo magnet ring that was slid inside of the ceramic 5 magnet in order to get the extra flux we needed with the longer coil to keep everything in order with this design... Between the pole and top plate being saturated, the short paths, the lack of air cavity behind inside the magnet inner diameter, the phase plug and a different spider distortion has fallen a great deal. If I had to compare this against anything in an A/B test and get quantitative measurements as well it would be the Vifa XG18 or possibly the old woven 7" seas excel. I

What are the complete t/s I'm curious... A BL of 20 with 1.5kg of mms or cone mass? That is bad both ways... WTF? What Re is that BL of 20 measured at? I wonder how many idiots bought that sub... As for the weight I bet there

All the parts for Prototype 2 are in now so it should be done and here at the end of the month assuming everything goes fine with the assembly

Well this ended up being off spec for the coil it seems... We will get the centering fixed and the neo magnet and thicker bottom plate will get the qes to where it should be... The short paths should flatten out the Le a bit... The sensitivity is on the low side, there is more xmax than there should have been and the suspension is a bit stiffer than it should have been so the Fs is higher and the qes is higher... We have a different spider coming for the next version so hopefully they understood that request properly... The tweeter distortion figures are pretty nice at a drive level of 4V... The woofer cone is great as seen in the FR... The 1-2khz bump is a measurement artifact. The tweeter has a rather large peak on the low end but that

Well they had a problem with the magnet tolerance for the NdFeB40 insert (anticorrosion coating ended up making the OD ~40.5mm instead of 40...) so it wouldn't slide down inside of the ceramic 5 magnet... The component set should be here by the end of the month so they say... I think they understood my corrections about voice coil centering (should be centered on -.5mm instead of 0 ) properly since there is more stray field below the gap than above it but I guess we will see in a few weeks when I get that set in and sent to Npdang for Bl vs X. I sent the alpha set, .75" and 1" tweeters to npdang to get measured he should be getting me the results before too long (he has the drivers now)... Hopefully the build quality is up to par . (Thanks Npdang!) I should be able to get you some fairly accurate preliminary t/s parameters on the AlphX component set when I get that accurate mms measurement on the alpha.

$120 for the higher end alpha... The release order is as follows unless something unexpected happens with the omgea again... Alpha X, Omega, alpha low end... Hopefully the following nomenclature will clear up any confusion. Budget alpha: alphα-165 Higher end alpha: alphX-165 (as above with better tweeters, more xmax, 2 short paths and no cavity inside the magnet for reduced distortion, greater concentricity of the motor assembly, neo motor, 4mm more depth on the midrange, phase plug, 1dB/w less sensitive, better low end f3) I somehow think there will be more interest in the higher end version of the alpha... Hopefully the first alphX-165 prototype will be close enough to our specifications when we send it to Npdang for testing that we won

Just to clarify a bit on the short paths... The first short path is on the ID of the top plate and is .2mm thick The second short path is under the top plate filling the void left by the difference between the magnet ID and top plate ID. This is 1.6mm thick and since this cavity is no longer there it won

Well... They ended up costing us a bit

Monday we are expecting to hear the final quote on the higher end version of the Alpha Those parts are looking to be less expensive than we thought at first as well... We also have plans to come back and offer a high end crossover upgrade later for the alpha. It is going to need a custom tooling though and I want to spend some time tweaking the crossover in a car environment before I start inquiring about tooling.

I mean a real solid aluminum phase plug attached to the pole. I have two other motor designs drawn up that I want to get samples of as well... One of them I know they can do in quickly but the other is a little more non-standard. This component set is 2.5" deep, ~92dB/w though I haven

Alpha Component set Prototype 1: Woven white Kevlar cone, textile dome, pretty basic but decent crossover... I'm still debating if I want a phase plug instead of the inverted dust cap and if I should get a higher quality xover made for this unit. As-is it sounds amazing for its price but I think with a proper xover this set would really shine. Grill... We need to make a cool little logo...: .75" silk dome tweeter, not quite sensitive enough for the Delta but they have a very refined sound. I haven't had a chance to audition them much yet since I have been listening to the Alpha set since it arrived... This silk dome tweeter is a definite step up from the set used with the Alpha and seems to be the right tweeter for the Delta component set... It would also make a great drop-in replacement for the Alpha's tweeter at least with this basic xover... Time to see who feels like running a few tests on this unit and giving their input .

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