Check this design please, a bit low SPL is this normal?

Boscoe · 26th November 2010, 04:42 PM

Basically the looks of this sub I want to build are very important to me and so this is the best compromise of style and size to response, but when I looked at the dB SPL plot it made me a little worried as it was a bit low compared to my current monitors (Monacor SP-210) and so would appreciate a little input! I don't think it's too bad is it?

richie00boy · 26th November 2010, 05:01 PM

Welcome to the trade of extension for efficiency! Try putting in the sort of power it's rated for and see if that can meet your SPL target and doesn't go into over-excursion. I think you might have trouble in the 45-65Hz region.

blakkshepeaudio · 27th November 2010, 02:34 AM

Just double check your data entry. One of the pictures above seems to show an 8 ohm series resistance, which will have a large impact on output.

AndrewT · 27th November 2010, 10:17 AM

well spotted.
That would remove ~6dB from the SPL graph.

Boscoe · 27th November 2010, 11:26 AM

Ahh okay thanks!

26th November 2010, 04:42 PM	#1
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	Check this design please, a bit low SPL is this normal? Basically the looks of this sub I want to build are very important to me and so this is the best compromise of style and size to response, but when I looked at the dB SPL plot it made me a little worried as it was a bit low compared to my current monitors (Monacor SP-210) and so would appreciate a little input! I don't think it's too bad is it?

26th November 2010, 05:01 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Welcome to the trade of extension for efficiency! Try putting in the sort of power it's rated for and see if that can meet your SPL target and doesn't go into over-excursion. I think you might have trouble in the 45-65Hz region. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

27th November 2010, 10:17 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	well spotted. That would remove ~6dB from the SPL graph. __________________ regards Andrew T.

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27th November 2010, 02:34 AM	#3
blakkshepeaudio diyAudio Member Join Date: Sep 2010 Location: Country Victoria Australia	Just double check your data entry. One of the pictures above seems to show an 8 ohm series resistance, which will have a large impact on output.

27th November 2010, 11:26 AM	#5
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	Ahh okay thanks!

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