Welcome to TalkBass, the Premier Bass Player Community and Information Source. Register a 100% Free Account to post and unlock tons of features.
Discussion in 'Amps [BG]' started by bassjnky1, Jan 16, 2014.
Quick question...does anyone know the dampening factor of the Crest Prolite 2.0 and 3.0?
Damping factor > 255
Damping is nothing anybody has needed to worry about for any power-amp for decades and decades.
Why do you want to know how fast it can get wet?
Thanks for the technical paper...i'm evidently over-thinking this issue. I was messing around with different power amps and trying to understand some of the differences that I'm hearing. Nothing scientific. If this technical study is legit it makes one wonder why these figures are published at all.
Damping factor makes a big difference with regard to tube amps, not so much, as you have gathered, with solid state amps.
at this point, don't most ss amps have a better damping factor than the average 30' speaker cable?
Its a big number to boast about for marketing, people are getting wise to wattage, so moving on to other ones.
What you are hearing is undoubtedly about the input impedance and/or any other signal massaging that's going on in the power amps.
Damping factor can be an indicator of the sophistication of a power amp design. The reason for that is difficult to explain without getting super technical (this is covered in senior level engineering classes), but it involves gain, negative feedback, and stability...in other words, the amplifier's ability to correct proportion of input signal vs output signal, because that's what an audio amp should basically do. You put signal in, and get signal out that is exactly "scaled up". Engineers have achieved astronomical DF specs in solid state, push-pull type amplifiers (class AB, G, H). There are many patents relating to this, but there is a point of not being able to tell the difference sonically, as has been said. It's bragging rights.
Damping factor is manipulated extensively in solid state and tube amplifiers intended for musical instrument use. There are also many patents relating to that.
Traditional PWM class D amplifiers have inherently low damping factors, and again this is difficult to explain, but it relates to the stage that actually generates the PWM limiting gain, which reduces the effect of negative feedback, which means that the amplifier's ability to correct errors in proportion is limited. It's common for this type of amp to have damping factors in the 20 to 50 range.
Higher damping factors are possible with modern class D amp technologies. This gets the amp into "it doesn't matter sonically" territory. That's where the Prolite 2.0 is at.
I bought my Prolite 2.0 based on comments Bobby made in http://www.talkbass.com/forum/f15/good-source-crest-amps-998057/#post14588815
I am delighted with how well it performs.
Silent, powerful, and masterful control of subs and tops using the built-in 100 Hz biamping.
The bass is very tight and strong.
Your choice of speaker cable usually has a bigger effect on actual damping factor than the amp's spec.
Separate names with a comma.