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Old 1st December 2008, 06:54 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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Charlie
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Old 1st December 2008, 05:43 PM   #2
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How complex? chip amp? discrete?
Distortion level matter?
feedback amount matter?
what about cost?
class A,B, etc?
speaker sensitivity? loudness desired? room size?
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Old 1st December 2008, 06:13 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, 10:58 PM   #4
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I found this :http://audioacdc.com/downloads/AC.pdf
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Old 1st December 2008, 11:50 PM   #5
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Default Re: 100w into 4ohms?

Quote:
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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