Just an update - these upgrades/mods were worth every penny. They have so much more ' control ' ? than the Betas, they also seem more balanced re. frequencies, if thats possible. No problem with the low end, but then I keep the ART Tube preamp 40hz +- button @ - 12db anyways
No loss of volume that i can detect , probably be cause they are better specced than the Betas and the porting has helped, despite lower output of the Beymas. But then who takes notice of watts anyways ?
Kerrapp explanation but rather hard to find the appropriate words. Its hard to imagine why the Beymas are cheaper than Betas. Still, not complaining about price, as i got £140+ for the Betas, so just spent nearly £60 on the Beymas, and the good chap at Blue Aran ( great to deal with IME ) caved in to my haggling and sent them free postage. There wasn't a lot of profit for him in the first place so fair play to the guy. I doubt if he would have sent them gratis had i not ordered 4 at once, though.
Happy Camper here.
Listen to the gurus folks - they know what they're doing