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Old 1st December 2008, 07:54 AM   #1
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Default 100w into 4ohms?

Hey everyone, this is my first time back here in at least a year, and, Ive decided to have another look at my Sony SS-WP1000, as talk about 12 months ago in this thread Now, after that thread I had a little bit more of a look into it and decided it was all getting too much of a hassle, then today, while clean up some stuff, I found the Sub again, and thought (forgetting I had posted here 12 months ago) "I should build an amp for this thing". So I googled SS-WP100, and what do ya know, about half way down the page a link to my thread!. Then I was like, ahh, I remember this now, so I read through the thread, and some said i should actually measure the resistance of the speaker, which, as stated on the back, I thought was 1.3 Ohms. It is not!. then I realized, that building an amp for this would be easy as the actual impedance of my Sub is 4 Ohm. Now, does anyone have a suggestion for a nice Sub amp that could handle my RATED 100w into 4 Ohms.


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Old 1st December 2008, 06:43 PM   #2
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Location: Avalon Island
How complex? chip amp? discrete?
Distortion level matter?
feedback amount matter?
what about cost?
class A,B, etc?
speaker sensitivity? loudness desired? room size?
Just because you can't hear it doesn't mean no one can.
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Old 1st December 2008, 07:13 PM   #3
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Resistance is resistance, and impedance is a complex value, depending of the given frequency.
You can both measure it.
4 or 8 ohm is nominal impedance of speaker as it marked.
For a 100 watt on 4 ohm woofer , make any simply bipolar amplifier with about +, _ 50 volts of supply.
And use 4 output transistors per channel if you load it with 4 ohm.
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Old 1st December 2008, 11:58 PM   #4
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I found this :http://audioacdc.com/downloads/AC.pdf
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Old 2nd December 2008, 12:50 AM   #5
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Default Re: 100w into 4ohms?

Originally posted by Powertimes_2
Now, does anyone have a suggestion for a nice Sub amp that could handle my RATED 100w into 4 Ohms.

My Patchwork amp will do 100 watts @ 4 ohms with a +/-35VDC supply. Here.
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