Previous Thread
Next Thread
Print Thread
Rate Thread
ep400 60Hz hum
#446614 11/19/22 11:10 PM
Joined: Nov 2022
Posts: 2
H
HowardB Offline OP
newbie
OP Offline
newbie
H
Joined: Nov 2022
Posts: 2
I haven’t had my subwoofer hooked up for quite awhile. When I hooked it all up today there was a distinct hum when the power was on. I removed the chassis ground screw but the hum persisted!!! Help!

Re: ep400 60Hz hum
HowardB #446615 11/19/22 11:23 PM
Joined: Jan 2007
Posts: 10,193
Likes: 97
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,193
Likes: 97


ALFR 1000-8 1500-2
M5OW 1000-2x2
M2/M5 OW M2 3 5 50 80 100 VP160x2 VP150 QS8
125x2 500x4 600x2 800
Re: ep400 60Hz hum
HowardB #446618 11/20/22 06:05 PM
Joined: Nov 2022
Posts: 2
H
HowardB Offline OP
newbie
OP Offline
newbie
H
Joined: Nov 2022
Posts: 2
Thanks Mojo! Looks like I’m on the hunt for an isolation transformer!!

Re: ep400 60Hz hum
HowardB #446620 11/20/22 06:56 PM
Joined: Jan 2007
Posts: 10,193
Likes: 97
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,193
Likes: 97
Subwoofer Isolation Transformer/Ground Loop Hum Eliminator, Blue Jeans Cable Brand, Made in USA https://a.co/d/4TxgvMb

You may find the bass distorts when using an isolator due to the transformer saturating. If so, change your gain structure by turning down the volume of the sub output of the receiver and turning up the volume of the 400.

You may not have a problem at all if the transformer is designed to saturate at some voltage higher than the sub out (say 10 Volts as most receivers never go above 7 Volts on the sub out).


ALFR 1000-8 1500-2
M5OW 1000-2x2
M2/M5 OW M2 3 5 50 80 100 VP160x2 VP150 QS8
125x2 500x4 600x2 800

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

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,847
Posts441,376
Members15,554
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,440
SirQuack 13,801
CV 12,071
MarkSJohnson 11,458
Who's Online Now
0 members (), 107 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4