More information about Pyle Pro
http://www.audiokarma.org/forums/showthread.php?t=348682
Next week I measure with spectrum analyzer and published results,
Surfing the net I found this
http://www.clinamenaudio.com/p.php?id=189
http://www.hifichile.cl/index.php?/topic/921-horns/page__pid__115838__st__870#entry115838
IMHO , A triode in the bass is not recommended is preferable to use a SEP (6550, KT88) in the midrange 300B , the Klipsch Lascala is optimal for midbass (70 Hz), My configration with set amps 6550 bass, 300B mids and 71A in high frecuencies.