kijanki
Responses from kijanki
| Class D Technology Stereophile test shows about 0.5Vp-p - that is about 1% since switched voltage is in order of 50-80V. It comes from the fact that output filter is 2-pole making it -40dB/decade while switching frequency is about decade above filters cutoff fr... | |
| Class D Technology Talking about Spread-Spectrum during cold war could put you in a prison (top secret). Today all CDMA cellphones (Verizon, Sprint etc.) use spread spectrum. It is interesting application for class D, especially when receiver reacts only to averag... | |
| Class D Technology Perhaps this explanation will be easier to understand: If you make loop of a wire conducting electric AC current the radiated EMF will be proportional to loop area. If you reduce area to almost zero (like wires together in a cable) the radiated ... | |
| Class D Technology When electricity flows in two wires in opposite direction it tends to cancel radiated EMF or capacitively coupled noise. Same goes for receiving - the closer two speaker wires are - the less susceptible they are to pick up anything. Twisted pair... | |
| Class D Technology There is about 1% of switching voltage noise on the speaker cable since filter is not perfect but, as I said before, 1/300 wavelength antenna won't radiate. In addition, electricity in speaker cable flows in both directions canceling the most of ... | |
| Warm-up time for amps and preamps rvpiano, I second you on the Scotch - very effective. | |
| Warm-up time for amps and preamps I’m running a Class D Taranis by Merrill Audio. Got a bit concerned by rvpiano’s tech’s comment about "on with no input signal" being bad for Class D. There is absolutely no reason why running without input signal would be bad for any class D ... | |
| Class D Technology Maybe we will start seeing Class D preamps then... Perhaps. Delta-Sigma D/A, A/D converters, SACD and DSD are already class D. | |
| Class D Technology Speaker cables would be a very poor antenna. Since wavelength of 500kHz switching frequency is 600m a typical 2m cables would be 1/300 wavelength antenna. Usually antenna becomes rapidly ineffective below 1/10 of the wavelength. | |
| How do you know if your amp is putting out @ Rated Wattage ? According to my calculations it is about 11xPerceived loudness increase = k^(1/3.5) , where is ratio of power.11^(1/3.5) = 1.984http://www.aes-media.org/sections/pnw/pnwrecaps/2006/jj_loudness/Some studies mention k^0.3 (10^0.3=1.995) | |
| How do you know if your amp is putting out @ Rated Wattage ? 2x power makes only 22% louder. | |
| Class D Technology Well, most of people on this forum (including you) think that SMPS is noisy and linear power supply is better. This believe comes from bad rap of noisy crude computer SMPS applications. They don't even realize that "Linear" power supply is a pri... | |
| Class D Technology The main reason manufacturers of high end audio (like Rowland) use SMPS is low noise and line/load regulation. You can find it in FAQs on his (or Benchmark) website. He uses SMPS in preamps where size or efficiency play no role.Yes, top manufact... | |
| Class D Technology This is a huge step in the right direction getting rid of another point of noise (the smp), with the added lift of future higher switching frequency/filters and the benefits it brings, would spell the end of all linear amps. And Srajan's tubes b... | |
| Analog output for hifi tls49, Thanks - that is very important info. I've spent 2 hours in the store and could not find it. It ended all good (I love my Samsung), but Panasonics are nice. |