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Post by theaterlover on Jan 4, 2013 16:47:14 GMT -5
From the specs, and XPA-2 has 45,000uF of secondary capacitance, while the XPA-5 has 60,000uF.
My question is about how this capacitance is divided among the channels during general use.
If an XPA-2 is receiving the same signal to both inputs, my assumption is that the 45,000 is shared equally between both (45,000/2). If one channel if significantly higher than the other, will that capacitance be greater for that channel (say 35,000 & 10,000) ?
Likewise for the XPA-5. Say two of the five channels are receiving a heavy load, will more of the capacitance be shared with those two channels, or is it always equal between channels? Or, to put it in another way, say only two channels of the XPA-5 were in use. Would that mean that those two channels would actually have greater secondary capacitance (60,000uF/2) than an XPA-2 (45,000uF/2), or would it be 24,000uF/2 for the XPA-5 as all channels share the capacitance whether in use or not?
Thanks.
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Post by geebo on Jan 4, 2013 17:15:23 GMT -5
The capacitance is part of the power supply and thus is available to use by any amplifier channel that needs it at any given time. It's kinda the same as asking how the transformer is divided between the channels.
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Post by jackfish on Jan 4, 2013 17:29:34 GMT -5
The XPA-2 has twelve 50V 15,000uF capacitors in a series/parallel configuration resulting in 45,000uF. The total effective power supply capacitance is ¼ what it would be if they were all wired in parallel, but provides a potential of 100V storage to drive the rail voltage up high enough to meet rated power. Hence, you can't just compare effective capacitance.
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Post by ocezam on Jan 4, 2013 21:05:39 GMT -5
The XPA-2 has twelve 50V 15,000uF capacitors in a series/parallel configuration resulting in 45,000uF. The total effective power supply capacitance is ¼ what it would be if they were all wired in parallel, but provides a potential of 100V storage to drive the rail voltage up high enough to meet rated power. Hence, you can't just compare effective capacitance. Excellant post. Thanks. ...
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