Originally Posted by clausdk
That's discouraging! I was about to embark on a DIY project and trying to decide between SEOS 18 with either 1" or 1.4" throat or step up to the SEOS 24 and the BMS 4594ND Coax driver.
Go for the Seos-24 and the BMS-4594 as it would likely hold pattern down a good bit lower than the Seos-18, and be better down at lower frequencies. The Seos-18 is only marginally better than the Seos-15. If you go for the Seos-18, understand that your compression driver choices won't include any of the wonderful BMS coax drivers. The best 1.4" compression driver at this time is the Radian 951BePB with a Be diaphragm it should be close in terms of pure SQ to the BMS, but it would lack in pattern control and would have to employ a higher crossover point. Not only that, but the Radian 951BePB is $1,100.00 each, and is the only way you will be able to get Seos-24 + BMS-4594 sound quality with the Seos-18 and any various 1.4" compression driver!