Sub Specs?

[Moocow16 10+ year member]

I see on all these top of of line sites about all these specs like Re, Fs, Qes, Sd, Qts, Qms , Xmax, Vas, Cms, BL, and anything else i've forgotten. what do all of these mean?thanks in advance.

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[RangerMan Premium Member]

Yea this is gonna be fun!

Re is the DC resistance (in ohms) of the subs VC

Fs is the Resonant frequency of the sub

Qes is the electrical Q of the sub at Fs

Qts is the total Q of the sub at Fs

Qms is the mechinical Q of the sub at Fs

Sd is the effective surface area of the sub

Xmax is the linear one way travel of a sub's cone (perhaps the most important factor)

Xmag excursion limit due to the MAGNETIC limits of the motor

Xsus excursion limit due to the sub's suspension

Vas equivalent air compliance

Pe thermal capacity of the driver (in watts)

Xmax is the shorter of the Xsus and Xmag values.

Welcome to the world of subs

 

[Moocow16 10+ year member]

ok cool. very helpfull, all except for the Q stuff, i think you've confused me more, can you explain that any better? thanks.