Hi there,
I've had a good search through the hornresp manual and google searches, but I cannot find any explanation of the 'QL' parameter. This is for a bass reflex subwoofer.
I can see from manipulating it that it affects the size of the lump in the low corner created by the port. I see Hornresp refers to it as 'Quality Factor'.
Roughly, I'm guessing it means losses due to natural factors such as the sound lost to cabinet resonances etc. But how do I adjust the QL parameter to represent what my built enclosure will sound like? Or is it best just to leave it on 7 and see how it comes out?
Thanks
I've had a good search through the hornresp manual and google searches, but I cannot find any explanation of the 'QL' parameter. This is for a bass reflex subwoofer.
I can see from manipulating it that it affects the size of the lump in the low corner created by the port. I see Hornresp refers to it as 'Quality Factor'.
Roughly, I'm guessing it means losses due to natural factors such as the sound lost to cabinet resonances etc. But how do I adjust the QL parameter to represent what my built enclosure will sound like? Or is it best just to leave it on 7 and see how it comes out?
Thanks
That's a good point, in regard to losses due to cabinet resonances. I hadn't really thought about those contributing to QL, but of course, there will be some losses caused by cabinet vibrations. The value of QL = 7 seems to be a good starting point for any design. Keep in mind that, at least in a vented-box loudspeaker, there is a triumvirate of losses at Fb: QL, QB, and QP.
The Find tool in Hornresp Help could have been used to search for references to QL. 🙂
And thank you for this wonderful piece of software!
Peter
Some additional discussion and links to AES papers and other presentations on the topic of using QL for modeling vented enclosures:
https://www.diyaudio.com/community/threads/hornresp.119854/post-6308267
https://www.diyaudio.com/community/threads/hornresp.119854/post-6308267