- You are currently viewing Freel2.com as a guest - Register to take part or Log In
alex_pescaru
Member Since: 12 Mar 2009
Location: RO
Posts: 4642
![](templates/vbnew/images/spacer.gif)
|
The output to the sub is a low impedance one. A speaker output in other words.
The power amplifier may not have an output relative to ground. It may be a bridged output.
But if it is an output relative with GND, then it is easy to know which one is "-" (GND), with the use of a multimeter.
Anyway, the voltage levels at sub output are quite high comparing with the line in input needs of an amplifier.
For adaption the theory says that you may need to use a low resistance load (in order to close the power output stage and not let it float) in parallel with a resistive divider.
Just like the one here: http://www.tkk.fi/Misc/Electronics/circuits/speaker_to_line.html
|
4th Mar 2011 2:37 pm |
|
alex_pescaru
Member Since: 12 Mar 2009
Location: RO
Posts: 4642
![](templates/vbnew/images/spacer.gif)
|
If you are talking about the ground point of the sub power supply, then yes, any screw that is in touch with the metal body is ok.
As for the sub level input, if it is still too high, then use that resistive divider.
Or depending on the situation, use a symmetrical resistive divider, like this (the second one): http://www.sengpielaudio.com/calculator-voltagedivider.htm
|
5th Mar 2011 6:46 am |
|
Posting Rules
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
|
|
Site Copyright © 2006-2025 Futuranet Ltd & Martin Lewis