Re: My tweeters have sprung a leak!
|
Joined: May 2003
Posts: 18,044
shareholder in the making
|
shareholder in the making
Joined: May 2003
Posts: 18,044 |
Unless it is a lot worse than what JohnK has just described, it is a frequent thing that I usually refer to as the "space shuttle" syndrome. If lots and lots of top notch engineers lowest bidders cannot make a rocket that can't blow up once in a while, what is the probabily that regular engineers with create something totally perfect? Understand that this is a joke... I have great respect for the engineers who built/work on the space shuttle.
Last edited by kcarlile; 12/19/07 03:30 AM.
I am the Doctor, and THIS... is my SPOON!
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Apr 2007
Posts: 4,877
connoisseur
|
OP
connoisseur
Joined: Apr 2007
Posts: 4,877 |
My 'problem' is no different than described by sirquack and johnk.
glad to know this is normal.
I do however still notice somewhat of a rattle coming from my sub.
I thought I had fixed the issue by tightening the amp plate. It pretty much did resolve the rattle, but on very demanding explosions and such I can hear a rattle. It only happens when I am playing at LOUD volumes (sorry I have not taken an spl reading). It is more apparent when I up the gain on my sub via the denon from -10db to -8db which I often do for movies.
it sounds like the rattle is coming from the back of the sub. Usually when I put pressure on the amp plate it goes away. However, there was one particular time when it sounded like the entire box was going to rattle apart.
I need to decide if this is something to call axiom about or not.
Last edited by terzaghi; 12/19/07 03:46 AM.
-David
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Jan 2004
Posts: 13,848 Likes: 14
shareholder in the making
|
shareholder in the making
Joined: Jan 2004
Posts: 13,848 Likes: 14 |
When you say -10dB are you talking about the receiver sub levels, or the main volume? That seems pretty low. Normally, you want to be closer to 0dB and have the volume(gain) on the back of the sub lower. Maybe your running your sub volume to high and creating rattles, not sure.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Jun 2003
Posts: 6,833
axiomite
|
axiomite
Joined: Jun 2003
Posts: 6,833 |
My old amp, a Kenwood M2a, had this hiss you speak of. My current amp, a Rotel RB 1080, is dead quite.
Rick
"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Jan 2007
Posts: 10,494 Likes: 116
shareholder in the making
|
shareholder in the making
Joined: Jan 2007
Posts: 10,494 Likes: 116 |
I told you to put a beaver on your sub. Failing that, use a chunk of granite.
The hiss (junction noise from transistors/FETs) is perfectly normal. Just don't get speakers that have a sensitivity of 120dB/W/m.
House of the Rising Sone Out in the mid or far field Dedicated mid-woofers are over-rated
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Apr 2007
Posts: 4,877
connoisseur
|
OP
connoisseur
Joined: Apr 2007
Posts: 4,877 |
sirquack, I have the volume knob on the ep 500 set at about 7 oclock. I used the 3808 audessey auto set up- it set the at -10db in the denon. Verifying with an SPL meter the sub was pretty close 75 db along with all of the speakers.
Mojo, I am not sure that applying weight on the top of the sub fixes the issue. Pressing on the back generally does.
Last edited by terzaghi; 12/19/07 04:38 AM.
-David
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
|
axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
>>I need to decide if this is something to call axiom about or not. If you're not sure, call Axiom Have you tried sticking your arm in the port to see if the rattle is coming from the port tube ?
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Apr 2007
Posts: 4,877
connoisseur
|
OP
connoisseur
Joined: Apr 2007
Posts: 4,877 |
The rattle I initially heard was audible from my couch and it was higher pitched. It occurred at moderate to low volumes. This is gone after tightening the amp plate.
I watched a few clips from an LFE demo dvd that i obtained from AVSforum. Some clips were from the haunted, star wars episode II, and finding nemo.
I checked the output during some of the starwars explosions and peaks were near 100 db from my listening position. The rest of the movie was around 80 db, but peaks at about 97 occasionally. I guess what I am hearing for the most part requires me to walk up to the sub to hear it. A particularly long rumble from the haunted caused the vibration/rattle sound on the back of my subwoofer (this sound was audible within arms reach of the sub at normal listening volumes. If I cranked up the main receiver volume and upped the gain of the sub a little through the denon from -10 to -8db it was auidible from my couch) This rattle/vibration noise will completely stop if I press on the back of the sub or the side of the sub towards the back. I do not have to press on the amp plate directly.
So it seems that if I have to walk up to the sub during a 100db explosion to hear a rattle that is no big deal right? I just don't want to hear anything coming from my sub but LFE... what do you think?
short of sending a completely new ep500 I do not know what axiom could do for me...
Last edited by terzaghi; 12/19/07 05:39 AM.
-David
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Dec 2003
Posts: 10,420
shareholder in the making
|
shareholder in the making
Joined: Dec 2003
Posts: 10,420 |
Try Mojo's suggestion and put something heavy(10-20lbs) on top of the sub to see if it helps. It does sound like an enclosure vibration. Maybe Axiom needs to beef up their bracing.
Jason M80 v2 VP160 v3 QS8 v2 PB13 Ultra Denon 3808 Samsung 85" Q70
|
|
|
Re: My tweeters have sprung a leak!
|
Joined: Jul 2005
Posts: 738
aficionado
|
aficionado
Joined: Jul 2005
Posts: 738 |
Phew. so you are telling me I don't need to spend $700 on a not home depot air dried maple wood power strip stand or some traids from shady maple?
T LOL!!!!!
paul
Axiom M80, VP180, Qs8, EP500 Epson 3020 Rotel RB-880 Denon AVR-990
|
|
|
Forums16
Topics24,969
Posts442,622
Members15,633
|
Most Online2,699 Aug 8th, 2024
|
|
1 members (rrlev),
594
guests, and
0
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
|