Previous Thread
Next Thread
Print Thread
Rate Thread
Page 23 of 33 1 2 21 22 23 24 25 32 33
Re: EP350v2 versus EP350v3 specs
SirQuack #201154 03/20/08 01:51 PM
Joined: Jan 2007
Posts: 10,490
Likes: 116
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,490
Likes: 116
Yes, I assumed you have cable TV. I don't think we get HDOA up here yet.

All subs have input impedance. The higher the input impedance on your sub, the more load on your receiver's sub output. Splitting with a Y cable doesn't make a difference. The receiver sees the same load.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: EP350v2 versus EP350v3 specs
SirQuack #201166 03/20/08 04:01 PM
Joined: Oct 2005
Posts: 853
aficionado
Offline
aficionado
Joined: Oct 2005
Posts: 853
 Originally Posted By: sirquack
Jakeman, calling Jakeman, any ideas. \:\)


I'm only checking in every few days because I'm still holidaying in FL.

In any event Mojo answered your question about why FR changed when you unplug the 600. Its how the waves are interacting betweent the subs. You want the nodes to lessen in the room which happens when a peak and null originating from different subs interact, reinforce or cancel. The fact that you have a peak at 40hz means you need to tweak placement or phase some more.

About the hum. Not much you can do if it occurs when you are plugging subs into different outlets. To get rid of hum in my HT I ran extension cords from one outlet to get several subs on the same ground. Some people use cheater plugs with the ground removed. Also using surge suppressors with 60hz filters on every outlet sometimes helps keep down hum. If it persists I would suggest relocating the subs away from the fronts rather that listen to hum from a speaker.


John
Re: EP350v2 versus EP350v3 specs
jakeman #201167 03/20/08 04:27 PM
Joined: Jan 2007
Posts: 10,490
Likes: 116
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,490
Likes: 116
A surge suppressor with a 60Hz filter would prevent AC power from reaching the appliance since AC power is 60Hz on this side of the planet.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: EP350v2 versus EP350v3 specs
Mojo #201170 03/20/08 04:42 PM
Joined: Oct 2005
Posts: 853
aficionado
Offline
aficionado
Joined: Oct 2005
Posts: 853
Understood. Some surge suppressors have filters to reduce line noise which contributes to the hum. After I installed one, hum at one of my subs dropped so it was no longer noticeable.


John
Re: EP350v2 versus EP350v3 specs
jakeman #201203 03/20/08 09:52 PM
Joined: Jan 2004
Posts: 13,840
Likes: 13
shareholder in the making
OP Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,840
Likes: 13
Jakeman, this would make sense if the 600 was actually running. I have it turned off and unplugged. When I remove the Line In coax that is coming form my 2nd 350, the SMS-1 graph jumps and pegs from 30-50 hz or so. None of the subs are running through the sms-s, just watching the graph.

As soon as plug the coax back in, it tames down, I still have the 40hz hump.

I left you an audix at your home.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: EP350v2 versus EP350v3 specs
SirQuack #201204 03/20/08 10:11 PM
Joined: Jan 2004
Posts: 13,840
Likes: 13
shareholder in the making
OP Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,840
Likes: 13
I have a dedicated 20am circuit running my AV area. The only thing plugged into my TrippLite HTPowerbar10 is my receiver and cdplayer and projector. My Odyssey amps and subs are plugged into other outlets in the room on the same circuit. The 600 is actuall in the back of the room on a different circuit.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: EP350v2 versus EP350v3 specs
SirQuack #201207 03/20/08 11:22 PM
Joined: Jan 2007
Posts: 10,490
Likes: 116
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,490
Likes: 116
Randy,

To limit or eliminate the effect of a ground loop, all of your audio equipment should be powered from the same branch. And to eliminate or limit the effect of conducted noise and transients, no other load (eg. a blender \:\) ) should be placed on that branch.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: EP350v2 versus EP350v3 specs
Mojo #201209 03/20/08 11:28 PM
Joined: Jan 2004
Posts: 13,840
Likes: 13
shareholder in the making
OP Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,840
Likes: 13
By branch I assume you mean outlet on the same circuit? For all the subs I've used, the 350v1, ep500, ep600, and now 350v3', they have always been plugged into an outlet installed in my riser which is on the same 20amp circuit to the HT room

I have never heard this noise until now and nothing has really changed. All my other audio equipment is hooked up in the AV closet to the tripplite, except the Odyssey amps straigh to the wall.

No other products, blenders, refrigerators, microwaves, etc. are on this circuit, branch, or tree.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: EP350v2 versus EP350v3 specs
SirQuack #201217 03/21/08 01:11 AM
Joined: Jan 2007
Posts: 10,490
Likes: 116
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,490
Likes: 116
Each branch has its own breaker.

Maybe you should try adding a blender. The emissions from the blender may destructively interfere with the sub noise \:D .

If it makes you feel any better, I have a slight hum with my 600 but it never interferes with listening. As a matter of fact, no one notices it unless I point it out to them.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: EP350v2 versus EP350v3 specs
Mojo #201219 03/21/08 01:15 AM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
Mojo, didn't you say the hum disipated when the lights were turned off or maybe that was someone else? I keep meaning to bringht the PF60 down to see if it actually helps with noise issues.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Page 23 of 33 1 2 21 22 23 24 25 32 33

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,940
Posts442,457
Members15,616
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,441
SirQuack 13,840
CV 12,077
MarkSJohnson 11,458
Who's Online Now
0 members (), 386 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4