paperw8
Responses from paperw8
| Why 24/7 warm-up period on amps? 09-14-11: AlmargThe number "10" in all of your equations that I've quoted above should be "20," since you are computing the number of db based on a voltage ratio. I've explained it, Kijanki provided a proof of it, and Ott provided a proof of it.ki... | |
| Why 24/7 warm-up period on amps? 09-14-11: AlmargPaperw8, the fundamental misconception you have, which ultimately leads you to incorrectly assert that first order filters roll off at 3db/octave, is the notion that the numerical db value describing the ratio of two signals applie... | |
| Why 24/7 warm-up period on amps? 09-14-11: AtmasphereThe reason power cords make a difference despite the limitations described in this statement has to do with voltage drop in the power cord. It also has to do with how DC power supplies work.These effects can be quite measurable... | |
| Why 24/7 warm-up period on amps? 09-14-11: AlmargKijanki, no problem with the beer. Thanks for your comment, which as I'd expect is totally correct, with P representing power and U representing voltage.hold on, this goes to my previous comment: you can't just cite equations witho... | |
| Why 24/7 warm-up period on amps? 09-13-11: AlmargPaperw8, let me supplement the reference I previously provided with this one, supporting my contention that db = 20log(V1/V2), rather than 10log(V1/V2) as you have claimed. It was written by someone possessing technical credentials... | |
| Why 24/7 warm-up period on amps? 09-13-11: AlmargI could perhaps further support the credibility of my statements by describing my academic and professional background, but we've already diverted the topic of this thread far enough.here's the way it works almarg: i don't know you... | |
| Why 24/7 warm-up period on amps? 09-13-11: AlmargPaperw8, we had discussed the definition of db for electrical signals in another thread a while back, and as I indicated then, with all due respect you are simply wrong. Please do some further research, and I think you will see tha... | |
| Why 24/7 warm-up period on amps? 09-12-11: AlmargPaperw8, on the 3db vs. 6db per octave question, see this.the equation for dB measurement is:q_dB=10*log(q1/q2)where q1 and q2 are measured quantities and q_dB is the dB measurement for those quantities. when q1=q2/2, q_dB is -3dB.... | |
| Why 24/7 warm-up period on amps? 09-12-11: AlmargPaperw8, what Rower30 is referring to is the fact that the capacitance of a line level interconnect will interact with the output impedance of the component which drives the cable, forming an RC low pass filter. The "R" corresponds... | |
| Why 24/7 warm-up period on amps? 09-12-11: Rower30 What there is, is an increase in capacitance as the leads get longer (say bye bye to higher frquencies at 3 dB per octave at the filter fo frequency which drops as the leads get longer). So all the gold and silver on earth won't... | |
| Why 24/7 warm-up period on amps? 09-12-11: Rower30Pre amp to power amp leads need low cap. too. Big ass copper does ZERO at the lengths we're talking about. The attenuation is NOT the problem in leads with no current (E=IR). There is no real voltage drop across the leads. What th... | |
| Why 24/7 warm-up period on amps? 09-12-11: AlmargI would just add to what has been said the thought that if there are in fact mechanisms by which warmup beyond the point of thermal stabilization can produce audibly significant changes, I see no reason to expect those changes to n... | |
| Do powercords make a difference in sound? 09-09-11: MrtennisI have discussed the subject of designing an amp with a fixed power cord or an iec. several have said that an iec degrades the sound, and a well designed permanently attached will provide (a) superior sign(al).theoretically this ... | |
| Do powercords make a difference in sound? 09-09-11: TbgAnother reason many manufacturers don't include power cords is that they don't want to irritate many power cord manufacturers while pleasing only one.i'm not so sure about this explanation. for example, krell apparently decided that t... | |
| Do powercords make a difference in sound? 09-09-11: DrubinI stand by what I wrote, paperw8, but do acknowledge that it's a bit more complicated. Manufacturers know these days that their products need to come with detachable power cords because audiophiles are accustomed to having that cho... |