Powersoft Digam 5000 on T48-3015LF

Is this amp OK?
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byacey
Posts: 947
Joined: Thu Jun 14, 2012 9:09 am
Location: Edmonton, Alberta, Canada

Re: Powersoft Digam 5000 on T48-3015LF

#46 Post by byacey »

Approaching Xmax and even worse,exceeding it, also tends to stretch and weaken the spider and surround, which also will promote early failure of a speaker.
Built
T48s
WH8s
SX212

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thijs666
Posts: 489
Joined: Sun Oct 08, 2006 5:29 pm
Location: Netherlands

Re: Powersoft Digam 5000 on T48-3015LF

#47 Post by thijs666 »

Bill Fitzmaurice wrote:Take xlim off the table. You don't want to fool with approaching it. Always limit to Pe or xmax, whichever is lower. With the 3015LF they're the same.
Understood. Thank you.

Grant, nicely put :cowboy: . The theory in the parts you copied from Wikipedia I already knew; I assumed they were quite common knowledge, so I didn't elaborate on it (that is why I put the '@35 Hz' in, assuming Xmax and Pe would both be reached at the lowest frequency allowed at full power for the T48 design -ok, actually half power since, when filtering at 35Hz, power is down 3dB at set frequency, 3dB meaning half the power-). Seems you've learned something again from this forum :wink: :mrgreen: .

Including all answers, replies and considerations given in this topic, I think I can best compare the issue with my car:

I have a diesel engine in my car that's made for the long run. 600.000 km's should be easily achievable - assuming you treat it nicely. It delivers 110 BHP, but its motor management chip can be reprogrammed to deliver up to 135 BHP, even more if you really push it. This of course does mean more strain on everything; the motor, the clutch, the drive train, the axes, the suspension, the brakes, et cetera. So that 600.000 figure comes down. Now I have to ask myself: Do I want to have fun for a long time, or just a little more fun for a considerable shorter amount of time/kms with potentially more costs/repairs?

I choose the former :!:.
BF cabs built to date:
2x T48 21" 3015LF; 1x T48 24" 2xBP102; 1x DR250 2510 loaded, cross firing; 4x DR200 Beta 8, melded array; 1x TT HL-10c; 2x WH Beta 8, melded 'array'; 3x AT 15" Tang Band W8-740P; 1x AT 15" JBL GTO1014

Grant Bunter
Posts: 6912
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
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Re: Powersoft Digam 5000 on T48-3015LF

#48 Post by Grant Bunter »

thijs666 wrote:Grant, nicely put :cowboy: . The theory in the parts you copied from Wikipedia I already knew; I assumed they were quite common knowledge, Seems you've learned something again from this forum :wink: :mrgreen: .
Thanks :)
I've learnt heaps here already lol, some of the road has been a bit bumpy though.

Plenty more to go yet no doubt...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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