PE250 amp w/ bass boost

JoelTW

Stunt Coordinator
Joined
Apr 1, 2003
Messages
110
Comments about bass boost w/ Shiva? Good, bad?

[edit] Vented, ~140L, 4" flared port tuned to (23Hz I think?)

TIA
 

Jack Gilvey

Senior HTF Member
Joined
Mar 13, 1999
Messages
4,948
Stock boost is at 30Hz I believe. Bad.

That big a box you'd want to tune lower. Change your mind about the EBS?
 

David Lorenzo

Stunt Coordinator
Joined
Dec 12, 2002
Messages
198
Hi Joel. Did you use the whole length of the tube for the Precision Port? You should have a lower tuning if you did. Around ~18 hz I believe.
 

JoelTW

Stunt Coordinator
Joined
Apr 1, 2003
Messages
110
I don't get the port until tomorrow.
I'll try it with the whole port length...

Also, I saw some pictures of a DVC sub with wiring the 2nd voice coil in reverse (series?)...Do I need to wire the 2nd voice coil?
 

JoelTW

Stunt Coordinator
Joined
Apr 1, 2003
Messages
110
what do I enter as the "Series Resistance" in WinISD pro


here I took a screenshot... It says with only 150 W and 4 ohm it will be at its maximum excursion... or am i doing this wrong


 

Ryan Schnacke

Supporting Actor
Joined
Feb 5, 2001
Messages
876
The series resistance is NOT the resistance of the woofer. Its the resistance of the wire and terminals and connections along the way between the amp and the woofer.

WinISD Pro puts an initial value of 0.1 ohm and that's a pretty good guess. 4 ohms is nowhere close and its messing up your sims. With 140L, 17 inch (effective) port length (18.5Hz tune) and 0.1 ohms series my sim reaches Xmax with about 220 watts at the highest excursion point above tuning - about 28Hz.
 

JoelTW

Stunt Coordinator
Joined
Apr 1, 2003
Messages
110
haha, ok, thanks a lot




anyone know how quickly adire ships? I might order the driver soon
 

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