Okay, thanks guys.
Not sure if I have a rumble filter or not - the information supplied with the amp is scant - only that which is posted on the net by the supplier here:
http://www.mwave.com.au/newAU/mwaveA...Y&sku=49070010
I have found modifications at the following two threads, however, I'm not sure which model amp I have (because I brought it from a different supplier):
Amp 1 mods:
http://www.customanalogue.com/critical_q_sub_av_v.htm (older amp - I think I have this amp)
Amp 2 mods:
http://www.customanalogue.com/critic...and%20Comments (newer amp)
I think with close inspection I should be able to tell which amp I have (this weekend project).
Brent, can you tell if either of these two amps have a rumble filter? Any suggestions as to which parts to change would be greatly apprecitated! I have no idea about electronics except I have done a bit of soldering, sometimes even successfully...
These mods are recommeded for an audiophile set-up rather than HT because I think it results in lower SPL. (thread here:
http://www.customanalogue.com/sub_index.htm - note, this is not the design I used). Still, I think my problem is extension really - I want to avoid the drop off I have at 24hz (extend down to 20hz). But you still both recommend changing or removing the boost?
Also, I have noted that one thread states the driver Xmax is 12.5 liner one way while Max Linear Excursion is 28.75mm (e.g. the above audiophile sub build thread). Hope I haven't put you all wrong with the Xmax figure?
To answer your question re my
PR tuning Brent, I built my sub following a build thread which recommended 790gms total per
PR and I reduced it slightly whilst trying to tune the PRs after building the box - because my box was slightly different in size. I think this weekend I'll try adding the 465gms to each
PR as WinISD suggests. And modding the amp if time permits...