Fane 18XB 600W Advertised as 800W

Muckerbarnes1 wrote: levyte357 wrote: Dub Specialist wrote: someone clear it up please its even more confusing on fane site the Xb is now 1000w...... Yep but these haven't changed, Qes 0.358 Qts 0.337 Vas Ltr 236 Vd litres 0.803 CMS (mm/N) 0.13 BL T/m 25.9 Mms (grms) 173 Xmax (mm) 7.5 Guess this driver will be available 1st week in April. Radio carbon dating will help here Lev.

Doubt it.  Radio carbon dating would just say the driver is now extinct, even though we're looking at one..

The T/S specs of the 2009 "800W" driver, match the new 1000W driver..

Understand there's a long waiting list for the * NEW * driver.

ArthurG wrote: Nachural wrote: Worth checking I suppose, we don't know for certain either way if there is a technical difference. I'm surprised FANE did not answer correctly but the new 800W models manufactured since mid 2010 have an IN / OUT voice coil when the old 600W has only an OUTSIDE voice coil. That explains the increased power rating. Cheers Arthur

 is this correct anyone for sure? so what we saying pre 2010 there is NOT inside and outside windings of the voice coil?

Ok so this is what's always confused me, lets say a speaker has an xmax of 14mm(one way). (bncsw115, 28mm both ways) but the driver has full excursion of 60mm back and forth. Surely when it says mechanical failure is when the coil comes out the gap, how come this driver has full excursion of almost double the size needed?

Sorry what is xlim?

KonanSS wrote: Ok so this is what's always confused me, lets say a speaker has an xmax of 14mm(one way). (bncsw115, 28mm both ways) but the driver has full excursion of 60mm back and forth. Surely when it says mechanical failure is when the coil comes out the gap, how come this driver has full excursion of almost double the size needed?

Each manufacture has their meaning on how to estimate xmax. Personally, I only focus on the one way peak or peak to peak and pay no mind to the xmax. You also need to take into consideration how many drivers you have lost due to having the cone extend so far that the cone dislodges. The majority lose drivers due to burnt voice coils not exceeding the xmechanical (one peak or peak to peak) limit.

Best Regards,

Interesting to read on first page that Fane and PD are now owned by Eminence.
Maybe this explains some of the differences in specs between Fane's older and newer designs?

Xmax- seems that few manufacturers specify this at 10% distortion.

Seems that RCF, PD, 18sound and the newer Fane products specify xmax as coil overhang plus air gap divided by 4. (In other words when 75% of the gap is still occupied by part of the coil, 25% of gap empty). 

However, it seems that the Fane 18XB's specs were still calculated using an old formula of  90% coil inside the gap. 
Using the same formula  Fane uses for calculating their newer drivers,  the 18XB indeed  have 9mm xmax and not 7.5.  Obviously mechanical limitations caused by the spider/surround would affect this.

Looking at Beyma and B&C, they seem to specify xmax as  overhang plus gap divided by 3.5.  Which results in their xmax specs being slightly optimistic. For instance the 18XB would calculate at 9.36mm  xmax using this formula.  Obviously there are differences in motor design that could effect these calculations ...