Speaker Cabinet

InfinityPWS · 13th January 2006, 01:21 AM

I have a Seas P17Rex in a 11L bookshelf enclosure... manage to tuned it to 70Hz

now i'm wondering by maxing it bigger... let say 15L... with the same port length and size, i will get lower bass say maybe 60Hz (i'm just guessing)

i have earlier manage to tune the 11L down to 50Hz, but sound in the region 65Hz - 90Hz suffer as i notice there are noticable difference in dB... now my question is based on your experience, will the bigger box (15L) suffer the same if i use same port length and size ?

69stingray · 13th January 2006, 01:37 AM

You may want to verify this with some online calculators, but, if you keep the port length and diameter the same and INCREASE the internal volume, the tuning Freq. will be lowered. I can't tell you want it will do to sound quality.

sreten · 13th January 2006, 02:11 PM

The ports in the 11L and 15L boxes are the same size.

Retuning to 50Hz is easier than making the box bigger.

/sreten.

13th January 2006, 01:21 AM	#1
InfinityPWS diyAudio Member Join Date: Oct 2004 Location: KL	Speaker Cabinet I have a Seas P17Rex in a 11L bookshelf enclosure... manage to tuned it to 70Hz now i'm wondering by maxing it bigger... let say 15L... with the same port length and size, i will get lower bass say maybe 60Hz (i'm just guessing) i have earlier manage to tune the 11L down to 50Hz, but sound in the region 65Hz - 90Hz suffer as i notice there are noticable difference in dB... now my question is based on your experience, will the bigger box (15L) suffer the same if i use same port length and size ?

13th January 2006, 01:37 AM	#2
69stingray diyAudio Member Join Date: Apr 2005 Location: NH	You may want to verify this with some online calculators, but, if you keep the port length and diameter the same and INCREASE the internal volume, the tuning Freq. will be lowered. I can't tell you want it will do to sound quality. __________________ Audio DIY Page FOLLOWMY529.COM - Subscribe and follow the performance of my daughter's 529 College Saving Account.

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