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Damping Factor - Actual listening tests?
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<blockquote data-quote="Peter Morris" data-source="post: 145761" data-attributes="member: 652"><p>Re: Damping Factor - Actual listening tests?</p><p></p><p></p><p></p><p><span style="font-size: 10px">John, I'm not that old that I have ever used a tube amp for PA applications.:razz:</span></p><p><span style="font-size: 10px"></span></p><p><span style="font-size: 10px"></span><span style="font-size: 12px"><span style="font-size: 10px">If the speaker cone is accelerating faster than it should then it will become a generator and the amplifier will put the brakes on so to speak, accordingly a low impedance output / connection is better brake. There is some control, but not to the extent you get with an active feedback loop e.g. servo-drive systems – I assume this is what you meant when you said "not strictly controlled" </span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px"></span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px">Powersoft are actually using the DSP in their amplifiers to implement Active Damping Control, providing dramatically improved cone control with a virtually negative output impedance.</span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px"></span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px">For Jason, a simple example is to tap the cone of your bass speaker before it’s connected to the amplifier. It will resonate. Connected it to the amplifier and tap it again. You will just get a dull thud. If you put a resistor in the circuit (at a guess 50 ohms) you will get a little bit of resonance. </span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px"></span></span></p><p><span style="font-size: 12px"><span style="font-size: 10px"></span><span style="font-size: 10px">For me in 2015 dampening factor is moot. All modern amplifiers have good dampen factors. I just use the biggest cables and shortest runs that are reasonably practical. There is nothing else I can do other than to be mindful that loading my amplifiers down to 2 ohms on long skinny speaker cables is not a particularly good idea …. and engaging the ADC on my Powersofts.</span></span></p><p><span style="font-size: 12px"></span><span style="font-size: 10px"></span></p><p><span style="font-size: 10px"></span></p><p><span style="font-size: 10px"></span></p></blockquote><p></p>
[QUOTE="Peter Morris, post: 145761, member: 652"] Re: Damping Factor - Actual listening tests? [SIZE=2]John, I'm not that old that I have ever used a tube amp for PA applications.:razz: [/SIZE][SIZE=3][SIZE=2]If the speaker cone is accelerating faster than it should then it will become a generator and the amplifier will put the brakes on so to speak, accordingly a low impedance output / connection is better brake. There is some control, but not to the extent you get with an active feedback loop e.g. servo-drive systems – I assume this is what you meant when you said "not strictly controlled" [/SIZE] [SIZE=2]Powersoft are actually using the DSP in their amplifiers to implement Active Damping Control, providing dramatically improved cone control with a virtually negative output impedance. [/SIZE] [SIZE=2]For Jason, a simple example is to tap the cone of your bass speaker before it’s connected to the amplifier. It will resonate. Connected it to the amplifier and tap it again. You will just get a dull thud. If you put a resistor in the circuit (at a guess 50 ohms) you will get a little bit of resonance. [/SIZE][SIZE=2]For me in 2015 dampening factor is moot. All modern amplifiers have good dampen factors. I just use the biggest cables and shortest runs that are reasonably practical. There is nothing else I can do other than to be mindful that loading my amplifiers down to 2 ohms on long skinny speaker cables is not a particularly good idea …. and engaging the ADC on my Powersofts.[/SIZE] [/SIZE][SIZE=2] [/SIZE] [/QUOTE]
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