the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

bi-amp sub?


Post ReplyPost New Topic
< Prev Topic Next Topic >
nismo350z 
Member - Posts: 44
Member spacespace
Joined: February 23, 2005
Location: United States
Posted: February 17, 2006 at 5:57 PM / IP Logged  
I was thinking about hooking up 2 XA1000 Amps @ 4 ohms. I would hook up each mono block to a diffrent voice coil on my 12" eclipse sub. Good idea or bad idea?
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: February 17, 2006 at 6:12 PM / IP Logged  
In general, you should only try to dual amp a speaker if the following are true: 1) The RMS output of each amplifier does not exceed the single voice coil power rating; 2) The amps are exactly the same type and the gain is exactly matched; 3) The amplifiers receive the exact same input signal.  If these things are true, go for it.  It is far easier, however, to use a larger single amplifier.
Support the12volt.com
nismo350z 
Member - Posts: 44
Member spacespace
Joined: February 23, 2005
Location: United States
Posted: February 17, 2006 at 6:19 PM / IP Logged  
The amps are going to be exactly the same and their 325 rms a piece and the sub can handel 750 so i ought to be good, I know its stupid but the reason why im doing 2 amps for the sub is so their all eclipse matching amps =/
darthness 
Copper - Posts: 136
Copper spacespace
Joined: December 12, 2004
Posted: February 17, 2006 at 7:49 PM / IP Logged  
make sure your gains are matched.... i belive if they're not perfect, each voice coil could move differently and your sub will be a big paper weight
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: February 17, 2006 at 11:52 PM / IP Logged  

In the interest of dispelling myths: the reason you need the amplifier gains set exactly the same and the input signals to be exactly the same is to avoid magnetic field cancellations in the voice coil assembly that can reduce your output.  The woofer will not be physically damaged by opposing forces generated by different signals (unless the power input exceeds the ability of the voice coils to dissipate the heat.)  The opposing forces will simply cause loss of voice coil motion.  Two equal signals 180 degrees apart will simply cause the voice coil to stop moving.  If you are at or near the power limit of the coils, this loss of motion can cause them to burn up much faster than normally since it is the motion that cools them (as well as what generates the sound waves.)

So, bottom line is the woofer will not be "torn apart" or any other catastrophic disaster like I've read before here and elsewhere, but it can cause poor performance and faster death by heat.

Support the12volt.com
darthness 
Copper - Posts: 136
Copper spacespace
Joined: December 12, 2004
Posted: February 18, 2006 at 11:25 AM / IP Logged  
thanks for clarifying that... maybe that catastrophic disaster occurs when each voice coil gets sent different amounts of poewr.... i'm not sure though.
but either way, its probably not a great idea
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: February 18, 2006 at 11:38 AM / IP Logged  

darthness wrote:
thanks for clarifying that... maybe that catastrophic disaster occurs when each voice coil gets sent different amounts of poewr.... i'm not sure though.
but either way, its probably not a great idea

Actually the only "catastrophic disaster" that can occur is if the coils burn up.  That's all that can happen.  Different amounts of power mean nothing.  It's different phase that causes loss of output and excess heat.

Support the12volt.com

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, October 31, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer