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Amplifiers
VFL 4480.1 - actual output
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<blockquote data-quote="basscube5" data-source="post: 8461118" data-attributes="member: 668183"><p>I did measure current in the leads going to the woofer, but it was really low. Maybe it was my meter but most likely it's because the sub was in free air and the impedance went through the roof. Just the same I was powering the amp off a 20' set of booster cables with the last 12" from the clamps to the amp's inputs made up from 10 awg speaker wire. The voltage stayed as per my notes above but it wouldn't have been able to make any big power under a heavy load. If I had a resistor bank I'd hook it up for real and run the **** out of it. It wouldn't be hard to figure out power factor and real watts, my Oscope has 2 inputs.</p><p></p><p>You can get 65+ volts at the speaker output but the wave gets real ugly. You can hear it in the woofer when the THD gets excessive, it's very obvious, it goes from a hummm to a buzz over a span of about 2 volts, not super scientific I know but it is surprising how ugly the wave has to get before you can actually hear it. 55-57 volts is about the limit from what I found yesterday. All theoretical at this point but 55 volts and a PF of 0.8 at 1 ohm is 2420 wrms...</p></blockquote><p></p>
[QUOTE="basscube5, post: 8461118, member: 668183"] I did measure current in the leads going to the woofer, but it was really low. Maybe it was my meter but most likely it's because the sub was in free air and the impedance went through the roof. Just the same I was powering the amp off a 20' set of booster cables with the last 12" from the clamps to the amp's inputs made up from 10 awg speaker wire. The voltage stayed as per my notes above but it wouldn't have been able to make any big power under a heavy load. If I had a resistor bank I'd hook it up for real and run the **** out of it. It wouldn't be hard to figure out power factor and real watts, my Oscope has 2 inputs. You can get 65+ volts at the speaker output but the wave gets real ugly. You can hear it in the woofer when the THD gets excessive, it's very obvious, it goes from a hummm to a buzz over a span of about 2 volts, not super scientific I know but it is surprising how ugly the wave has to get before you can actually hear it. 55-57 volts is about the limit from what I found yesterday. All theoretical at this point but 55 volts and a PF of 0.8 at 1 ohm is 2420 wrms... [/QUOTE]
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VFL 4480.1 - actual output
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