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In the Forum: Audio Discussions
In the Thread: A listening room for a domesticated Cat?
Post Subject: Not a fan of weak magnetsPosted by martinshorn on: 7/13/2017
hi Woitek. The K33 extend the bottom end by the high Q, to almost 40 cycles . Which is only ok if you work with passive XO on a single amp. Well that's how they were designed. Having designated amps that allow you to steer the parameter or even better a separate woofer below, you can take full advantage of low Q drivers. Which i prefer. I got 4 Fostex PA38 i liked the most. Once i heard bout the Vitavox AK15s i was surprised how similar they r. Good cause i cant afford them 
But the Fostex aren't built anymore either I recommend strong magnetics with lo mass. Browse a bit for 15 inchers with following parameters:
Qts < 0.28 the lower the better / Mms <80 grams the lower the better / VAS >400 the more the better /
Youll most likely find this looking for high output midbass PA, alnico guitar speakers, straight cones preferably. Avoid big coils and longthrow as the copper is the biggest weight and just makes tired sound imho. Mine got 1 mm overhang only and run just fine, 79mm coil, more than enough in a horn. I know such are hard to find. I think 18sound had 1-2 almost goodies. TAD got some, but too expensive. Old JBL D/K Series 130 or 140 are amazing! Once a year u get a mint pair on ebay. Rerurn to Romy the Cat's Site