| sjanand |
In the subwoofer I'm building, there are 2 X 300VA toroids planned as close as 3inches to the subwoofer magnet. My questions are:
1. Would the toroid demagnetize the subwoofer magnet in the long run?
2. Would the subwoofer magnet polarize the transformer to saturate?
Please comment.
Anand |
|
|
| pjp |
Let me add another thing for you to worry about:
3. Will the heat from the transformer / amp spoil the speaker cone ? |
|
|
| AndrewT |
| quote: | Originally posted by pjp
Let me add another thing for you to worry about :
3. Will the heat from the transformer / amp spoil the speaker cone ? |
The heat from the voice coil is more likely to be a cause of damage. |
|
|
| peranders |
| quote: | Originally posted by sjanand
In the subwoofer I'm building, there are 2 X 300VA toroids planned as close as 3inches to the subwoofer magnet. My questions are:
1. Would the toroid demagnetize the subwoofer magnet in the long run?
2. Would the subwoofer magnet polarize the transformer to saturate?
Please comment.
Anand |
1 The transformer has a very low magnetic field around it = NO :no:
2 Not likely with the distance but beware of it.
How big is the speaker element and how big is the enclosure? 600 VA in a small box? |
|
|
| sjanand |
Peranders,
See http://picasaweb.google.com/anand.s...gh/TheSubwoofer
There are two 12" drivers in push-pull config. Enclosure is completely sealed and is around 130 litres. SAF is bad -- Q is good -- around 0.85 measured roughly using SpeakerWorkshop.
I initially planned to plant the amp and transformers on the back panel. I'm now thinking of sqeezing them all into the pull-driver cavity. See snap 6.
--Anand |
|
|
| badman |
Toroids have good suppression of lateral fields. There is a significant field coming out the top and bottom of the toroid (like a column of flux centered around the hole).
Point this away from the drivers for best results. |
|
|
|
