Focal 33 V1 simulation sanity check - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 21st July 2015, 04:21 PM   #1
diyAudio Member
Join Date: Dec 2013
Default Focal 33 V1 simulation sanity check

Hello to all. Iím a long time lurker, first time poster.

Iíve been working on a subwoofer design using a Focal 33 V1 driver that I acquired cheap from a friend. My original plan was using another driver, but this Focal cost me a third of the price Iíd pay to import a Dayton RSS210HF-4 8Ē, for example. Hard to argue with that, specially for a first build.

My goal is a having very musical subwoofer with tight bass for using exclusively with music. This sub will complement a pair of small DIY bookshelves, for example the Speedster, by Paul Carmody, or the Sopranos, by Jeff Bagby.

Room is small and I listen at low levels, so I donít need much power or SPL. I was able to buy a Hypex DS1.2 plate amplifier on sale ($84 euros, being discontinued). It provides 120W in 4ohm. Should be plenty.

This amp has a 20hz -3db 4th order high pass filter and a bassboost of 2db at 25hz. The attached simulation models consider that and also a 100hz low pass filter.

My question is: which of the two simulations would you choose?

Box 1 is 42 liters with a 31hz tuning frequency and a F3 of 32hz.

Box 2 is 60 liters with a 27hz tuning frequency and a F3 of 27hz.

The bigger box makes sense. Better bass extension, flat within the crossover frequencies and no excursion or port noise problems. But I donít have enough experience to understand if itíll sound boomy or if the smaller box will sound better for my goals. Both simulations are tuned above the driver FS, which is 25.25hz

Thank you in advance for your feedback!

TS parameters are here.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Last edited by regrossi; 21st July 2015 at 04:57 PM. Reason: Formatting
  Reply With Quote
Old 21st July 2015, 05:23 PM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
Join Date: Nov 2003
Location: Brighton UK
Hi, I'd go 50L tuned to 25Hz, rgds, sreten.
There is nothing more practical than a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 22nd July 2015, 12:04 AM   #3
diyAudio Member
Join Date: Dec 2013
Thank you for the feedback, sreten.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
2-Way Sanity Check wrenchone Multi-Way 8 9th December 2011 07:54 PM
Sanity Check ..... please Lostcause Digital Source 0 16th October 2008 06:19 PM
Concertina sanity check PeteN Tubes / Valves 12 27th June 2007 03:54 PM
This model can't be right... need sanity check NogginBoink Subwoofers 4 30th July 2005 09:14 PM
Sanity check planet10 Multi-Way 14 7th March 2004 10:15 PM

New To Site? Need Help?

All times are GMT. The time now is 03:54 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2