Originally Posted by woody777
Originally Posted by Peen
I have a question, I was trying the Bass I love you track with my F15. Settings are 14hz, hi damp, 80hz cross on avr, limiter off. It would flap and bottom super easy, not even playing loud. So I tried it with limiter on and it pretty much wouldn't even play any bass. Is this normal? Sub is leveled with other speakers so not running hot either.
I'm having the same exact problem (same song, same issue) with my FV15HP.
OK I just realized the track is on you tube so I played it through my BR's you tube app. Took the grills off to watch cone movement, played in stereo at -20, then -10. My subs are 3db hot. 14hz ext, Hi Damp, Line in cuz I thought I'd need phase but haven't touched it yet, AVR/12, 1-Port, Rumble off, Limiter On, power auto. I need to switch from line in to LFE and I found my minidsp so may start using that soon when I find some time to tweak. I found a post claiming the notes in that song are "36hz, 34hz, 33hz, 31hz, 17hz, and 7hz".
This track may be in need of a high pass filter which I may add with the minidsp.
I did not get bottoming out but there is that one repetitive inaudible 7Hz note that causes A LOT of cone movement. Right before the notes that hit hard/are audible. It happens a bit more extended then the repetitive note right after the quiet section about half way through and right at the end also. Frankly I was really impressed, but that super deep note is kinda scary. However it causes a lot of air moving around. I do feel it, just can't hear it, and I've got some room rattles that need to be addressed that were enjoying dancing to the song.
What's going on is that 7Hz note is below the port tune (14Hz) where the woofer no longer gets the pressure support from the box and begins flapping fairly uncontrolled (can someone provide the more technical explanation). That's when a ported design can bottom out and you begin to get in danger of port noise. I did not get any port noise at -10 with subs +3db hot, but I think if I kept going higher it could happen. It's just the nature of ported design and not a product specific issue. You get more output with the ported, but it has it's drawbacks too. I prefer the tactile ported nature and am going to experiment with a pretty steep high pass around 10 or 14 Hz.
Can't say whether your subs are having an issue but this definitely verified mine (one built last august, one built in December) are functioning properly.Edited by dstew100 - 2/1/13 at 10:41am