Homemade Speaker - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd July 2013, 01:45 PM   #1
diyAudio Member
 
Join Date: Jul 2013
Default Homemade Speaker

Hi recently i built a homemade speaker system but it is constantly emitting a buzzing sound. I have simply two speakers connected to an amplifier and a 12V power source. I have also noticed that if im physically touching the negative wire of the speakers then the buzzing stops. This is annoying me as anything else i connect it to still causes buzzing its only me that stops it. Does anyone have any ideas how to fix this it would be greatly appreciated?
  Reply With Quote
Old 23rd July 2013, 07:21 PM   #2
diyAudio Member
 
Greebster's Avatar
 
Join Date: Aug 2010
Location: South of the Skyway
A grounding issue for sure. Possibly a bad cable and use a star ground scheme to a good solid earth ground (copper water pipe or ground rod)
  Reply With Quote
Old 23rd July 2013, 10:44 PM   #3
diyAudio Member
 
Join Date: Jun 2007
Buzz or Hum?

Buzz implies a mechanical sound as it something phyisically loose and rattling.

Hum implies an electrical sound, as in 60hz line hum.

Which do you mean?

If this is an electrical sound, then yes, you have some kind of ground issue. It could be a ground loop on the AC side. Or it could be a bad ground wire on the music side.

But, what it is, is difficult to determine without a few more details.

You claim the system runs off 12v, is that a 12v power supply or a 12v battery? And if a 12v power supply, what kind of power supply?

You say it stops if you touch the negative wire, but do you mean anywhere on the wire, or do you mean you touch the Bare Exposed Metal part of the wire? Or do you actually mean the Negative Speaker Terminal?

These all tell us different things, so we need precise details not generalizations.

Steve/bluewizard
  Reply With Quote
Old 24th July 2013, 04:46 AM   #4
diyAudio Member
 
Join Date: Jul 2013
Default @Bluewizard

Thanks for the help so far
anyway...

The sound seems to be both a hum and buzz. The hum stops when i touch the actual wire to answer your other question though there is a slight buzz. I'm not to concerned with the buzz as it is a very small sound but the hum is incredibly annoying (although if anyone has an idea for the buzz would be great to).

I've tried running it off an AC household power point with an adapter a 12V and also my power source generator, each giving the same result.

One thing i want to add is atm it is connected with alligator clips. Was going to properly solder some audio wire onto it later once i figured everything out but could this be a cause of the problem.
  Reply With Quote
Old 24th July 2013, 12:27 PM   #5
diyAudio Member
 
Greebster's Avatar
 
Join Date: Aug 2010
Location: South of the Skyway
Having done exactly as you have, experienced this hum induced buzz. Solid ground connections are a must. Still would suggest checking the cables to see if there is a weak link.

BW, you've never experienced hum induced buzz? Normally I've found the problem is two fold. Poor grounding and a bad or inadequate ground in a signal line or an open ended unterminated signal input is all it takes to produce this.
  Reply With Quote
Old 25th July 2013, 04:28 AM   #6
diyAudio Member
 
Join Date: Jul 2013
In terms of making a 'ground' connection could i just put a bit of copper pipe or something with high/low resistance in my speaker. I intend it to be portable so i dont want to be putting a giant piece of anything in there to make it work. Is there anything that works particulary well.
  Reply With Quote
Old 25th July 2013, 05:37 AM   #7
diyAudio Member
 
Saturnus's Avatar
 
Join Date: Jun 2005
Location: Copenhagen, Denmark
Please provide a simple wiring diagram. That'll make it much easier to find the source of your ground loop problem. And please state what exact components you're using.
  Reply With Quote
Old 25th July 2013, 10:01 AM   #8
AllenB is offline AllenB  Australia
diyAudio Member
 
Join Date: Oct 2008
Maybe this is the result of oscillation considering the alligator clips.
  Reply With Quote
Old 25th July 2013, 11:24 AM   #9
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
I keep a 12 volt battery around; lawn tractor, etc. to check things like this.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Building a homemade speaker Swankz Construction Tips 3 22nd July 2013 09:04 PM
homemade resistors Lostcause Parts 7 7th June 2007 07:34 PM
homemade faceplates PRNDL Tubes / Valves 6 10th March 2007 04:00 PM
Homemade magnets and homemade magnetizer jacquesl The Lounge 0 19th February 2007 06:32 AM
Homemade heatsinks Sch3mat1c Swap Meet 5 8th February 2005 01:46 PM


New To Site? Need Help?

All times are GMT. The time now is 10:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2