Hi all , I am not sure if this is the correct place for this question but if not please direct me to where I need to be.
I recently built a front ported 10" speaker cabinet for guitar and tested it by putting pink noise through it from my spectrum analyzer.
There is a spike at 160Hz and I am not sure why as I thought I ported it for 100Hz.
So my question is about this spike a 160Hz, is it the cabinet resonance, speaker resonance or something I am missing altogether.
Any help appreciated
Thanks
I recently built a front ported 10" speaker cabinet for guitar and tested it by putting pink noise through it from my spectrum analyzer.
There is a spike at 160Hz and I am not sure why as I thought I ported it for 100Hz.
So my question is about this spike a 160Hz, is it the cabinet resonance, speaker resonance or something I am missing altogether.
Any help appreciated
Thanks
Can you try re-tuning the system by changing the port length?
Or if you don't have the internal volume to lengthen the port, you could go down to a smaller port diameter and get more tuning flexibility (at the expense of potential port noise).
Or if you don't have the internal volume to lengthen the port, you could go down to a smaller port diameter and get more tuning flexibility (at the expense of potential port noise).
Thanks for the information. I closed off the port entirely and still had the bump at 160 hz. Can't figure where it is coming from
Your cabinet is likely too small, or it could be a room effect. If the back is removable, try running it open-backed. It doesn't suit everyone, but porting a cabinet for guitar use usually isn't recommended.
What are the dims of the cab? I hope it's not cube-shaped.
Chris661 may be right that the bump/resonance is caused by the cab being undersized. His suggestion to try it open-backed is right on. I've never personally come across a guitar speaker that wanted anything but open-back.
Chris661 may be right that the bump/resonance is caused by the cab being undersized. His suggestion to try it open-backed is right on. I've never personally come across a guitar speaker that wanted anything but open-back.
I've experimented with open backed vs sealed before now, using an Eminence Beta 12A (nice sound to it). Having the cabinet closed gave bassier sound (turned the bass down a bit, easier on the amplifier), but there was a serious resonance on the 5th fret of the E-string. There was lots of emphasis on it, and rolled off noticably the lower I went. Opened the cabinet, the resonance went, and the bass roll-off was much shallower. Not much fundamental output on drop C-sharp, but who'd want that anyway? (usually used with heavy overdrive, so bass isn't wanted)
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