Official Epik Subwoofer Thread - Page 230

Originally Posted by Gov

Yes, Ron you are correct that will tell for sure. Is there an easy way to do that with taking turning that monster over, plugging the ports, and then repositioning it? LOL

Originally Posted by clarkeven

Factor, I tell ya what, my room is 2300 cubic feet sealed up tight. I never run my receiver any higher than -10 since that is about the sweet spot, not to loud and not to soft and it fills the room with awesome sound, the sub pressurizes the room. I had a guy come over with his family and he was say how he paid $10,000.00 for his speakers. Well before he came down to listen to the system his younger son about 10 and his wife were down there with my son watching a movie. The son told the mom when the movie was over, "this sounds better than our movie theater" and the mom said, "don't tell your father that" I just smiled and said nothing, then the Dad came in for a demo and was in disbelief.

Now I know my speakers can't spank a $10,000.00 set of speakers but for the price I paid, and the astonished look on peoples faces is priceless...

Not that I'm trying to sway you into buying the speakers, just my 2 cents, in my little movie theater.

Originally Posted by mojomike

Re: The Phoenix, I'd very much recommend sitting the sub on a large tile or slab. This sub has an unusual design where the downward ports (boundary-loaded ports) and the surface beneath the sub have a deliberate synergy. If that relationship between the ports and the boundary are changed, the tuning is also changed. This is the key to stuffing such a large driver in a relatively small box and yet being able to tune the sub relatively low. In my opinion, for the sub to play exactly as designed, it should sit on a hard surface without altering the intended distance from that surface.

Originally Posted by Gov

I would not call this an issue at this point. That song is extremely demanding on one single subwoofer, and from what I have read, it causes port noise on a lot of the best subs out there.

Again, I have NOT experienced any audible port noise when watching movies or other music. And I sometimes listen very loud

Originally Posted by stepyourgameup

They would actually have to split the LFE into left and right channels. So if an explosion or gunshot happened on the right side of the screen then it would only play on the right sub.

Originally Posted by crazy joe divola

Gov,

It is interesting you called it a flutter. Look at the excerpt below from Sound and Vision magazine reviewing a VTF sub.


Saint-Saens, Organ Symphony (second movement) This is a deceptively simple piece of music, with pianissimo strings playing a simple melody and the organ exhaling a few sustained pedal tones. The problem is that those pedal notes are in the bottom octave, reaching all the way down to 16 Hz. Most subwoofers simply can't grasp that, so they fake it with upper harmonics. Only a few can tackle the lowest octave and play it loud enough so you can feel the air in your listening room (like the air in the organ loft) flutter.

I listened to the same track with my Phoenix and it feels like a flutter in my ear drums. I didn't notice any port chuffing from my listening position 12 feet away at a corrected SPL level of about 91dB.

Originally Posted by crazy joe divola

Gov,

It is interesting you called it a flutter. Look at the excerpt below from Sound and Vision magazine reviewing a VTF sub.


Saint-Saens, Organ Symphony (second movement) This is a deceptively simple piece of music, with pianissimo strings playing a simple melody and the organ exhaling a few sustained pedal tones. The problem is that those pedal notes are in the bottom octave, reaching all the way down to 16 Hz. Most subwoofers simply can't grasp that, so they fake it with upper harmonics. Only a few can tackle the lowest octave and play it loud enough so you can feel the air in your listening room (like the air in the organ loft) flutter.

I listened to the same track with my Phoenix and it feels like a flutter in my ear drums. I didn't notice any port chuffing from my listening position 12 feet away at a corrected SPL level of about 91dB.

Originally Posted by crazy joe divola

Gov,

It is interesting you called it a flutter. Look at the excerpt below from Sound and Vision magazine reviewing a VTF sub.


Saint-Saens, Organ Symphony (second movement) This is a deceptively simple piece of music, with pianissimo strings playing a simple melody and the organ exhaling a few sustained pedal tones. The problem is that those pedal notes are in the bottom octave, reaching all the way down to 16 Hz. Most subwoofers simply can't grasp that, so they fake it with upper harmonics. Only a few can tackle the lowest octave and play it loud enough so you can feel the air in your listening room (like the air in the organ loft) flutter.

I listened to the same track with my Phoenix and it feels like a flutter in my ear drums. I didn't notice any port chuffing from my listening position 12 feet away at a corrected SPL level of about 91dB.

Originally Posted by Gov

Could this be the port tubes inside the cabinet rattling?

Originally Posted by cschang

Are the port tubes braced inside the cabinet?

Play the tones and see if you can use your hand to keep the tubes from shaking.

Originally Posted by Gov

They must be braced because even if I put most of my weight on the cabinet, It still rattles from inside.

Originally Posted by Gov

Well, I do know my HSU 3.3 did this as well with this track.

Originally Posted by Gov

Well, I do know my HSU 3.3 did this as well with this track.

Originally Posted by Gov

I tried some test tones to see exactly where I am getting the noises at. Any test tone over 20hz zero noise no matter how loud I play them. The 16hz tone is the worst, with the 18hz a little better, and the 20hz its still there, but much better. After that, nothing.
When the noises begin I notice that the subwoofer is shaking quite a bit, but stays in its place. Could this be the port tubes inside the cabinet rattling?

Originally Posted by crazy joe divola

Gov,

I get the same ticking noises (but no chuffing) below 20hz and the sub is vibrating the entire room, but the ticking noise is coming from inside the sub enclosure. The ticking/clanking is really bad with 14hz test tone. Reaching underneath the sub and holding part of the flare and the actual port helped very little. It is really difficult to brace the port with my hands since the sub is down firing.

Originally Posted by lalakersfan34

Do you remember at what output level the Hsu would begin to make bad noises on this track? And was this in max output or max extension mode?

Originally Posted by Ron Temple

Gov, 91dbs uncorrected at 3M on a 16hz fundamental has got to be pretty demanding. Corrected it's 100.3dbs. crazyjoe's measurements were corrected 91dbs I believe. The reason you're getting more distress is that you're probably at the sub's limits or close to it.

Originally Posted by Hksvr4

Just got my updated grill. It clears the subwoofer. It's actually a little thinner.

Edit: I just moved the sub to another location and it's night and day. Bass is felt even better at listening position.

Originally Posted by Gov

Ok...you are getting exactly what I am then. If it is not chuffing, what the hell is this then? I know it is not reaching its limits at this point, and I do not hear this with anything else.
Since I was getting this as well with my HSU 3.3, it is not obviously an isolated thing.

Originally Posted by WestsideHT

No offense but you guys are freaking me out. My Phoenix is supposed to be shipped in the next couple days and I don't want to receive a product that is going to be giving me ticking and rattling noises from inside the box when it's not supposed to. Are you guys only getting them with test tones and that song you like Gov, or is it with other content like movies as well??

Originally Posted by Gov

Its okay, don't panic! It is basically on stuff 20hz and under at high SPL's. Even then, it is not that noticable unless you are listening to just the subwoofer. So, for example, with WOTW at -8dB MV from my listening postition, I cannot hear anything like that. With sine waves (which pipe organs basically are) you can hear it 20hz and under.
Have no fear, the Phoenix is a great sub

I am hoping Chad chimes in on this and comments soon!