Audio ground!!

Status
Not open for further replies.

Jackdaniel

New Member
Heya all,

someone here posted the audio ground must not be connected directly to powersupply ground! So i am in a big doubt regarding my 5.1 amp which i built a few months ago. So please take a look to the picture below which shows exactly how i connected the audio ground to supply ground! (there is hum through my speakers) and the powersupply to the "audio source" in the circuit below has taken directly from the same supply... So Please tell me if there is a problem..
 

Attachments

  • Jmw.jpg
    28 KB · Views: 161
Your diagram actually looks OK (no apparent ground loops or other obvious errors), but it's impossible to tell without knowing more about how the power supply itself is grounded. Also, are you sure the power supply ripple is sufficiently filtered? That could explain the hum you're hearing. Give us more details on the power supply, please.
 
the supply is well filtered by 2200uf/25v caps, and what do u mean with the powersupply "itself grounded"? What kinda ground is that? Pls explain me..
 
Jackdaniel said:
the supply is well filtered by 2200uf/25v caps, and what do u mean with the powersupply "itself grounded"? What kinda ground is that? Pls explain me..
Click to expand...

How is the power supply ground (or negative rail) connected to the amplifier ground? I'm talking about the physical connection as well as the electrical configuration: size and length of wires, etc.
 
Do not connect your input ground to the power supply ground or the output ground.
 
like the Pic shows i connected the audio ground directly to powersupply ground! Please check out the pic i posted above and post #1.the supply to the audio source(USB mp3 player) used the same powersupply from the same transformer!
 
Last edited:
J[/QUOTE said:
by the way i got some power carrying wires that passes along with audio input wires and over through the preamp and variable resistors! Do they make any problems?
Click to expand...
 
Status
Not open for further replies.

Similar threads

  • Question
What is floating ground , and why it needs insulation ?
Replies
3
Views
889
crutschow
E
  • Question
ATX Power, Earth Ground inbalance?
Replies
18
Views
2K
ChrisP58
M
  • Question
Audio activated LEDs
Replies
14
Views
2K
Tony Stewart
D
Audio out Mod Cap?
Replies
2
Views
952
Tony Stewart
F
  • Question
PCM2903C USB Audio Codec Alternatives & Experiences
Replies
5
Views
1K
For The Popcorn
F
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…