Just ordered 2 18" SI HST D1 drivers..

[compaddict]

Will do.

 

[compaddict]

They here! Stuffing them today...

 

[BP1Fanatic]

I bet kitty won't sit by them while they're breathing!

 

[compaddict]

Installed. This is what I have been waiting for!
Without any testing these bad boys have the authority I have been dreaming of.

 

[GM]

HST-mkiii 18 Sd = 176.71 in^2 x 2.54 x Pi = 1,410 cm^2.

Hmm, [176.71*4/pi]^0.5 = 15" dia. x 2.54 = 38.1 cm dia.

38.1^2 x pi/4 = 1,140.062 cm^2; or if wanting to get it quick/easy like me, then recommend this nifty little program or online converter: Convert for Windows – joshmadison.com

 

[Machismo]

Very nice looking drivers. Have fun listening!