kijanki
Responses from kijanki
| I went from Class D to Luxman A/AB - And most of what you think is wrong Yes 90kHz is a little better than 60 or 70kHz, but not by much - leaving noticeable phase shift in audio band. I’m not even sure that this phase lag is a problem, since speaker, being inductive at higher frequencies, shifts phase forward. Lamm Ind... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong You’ll just have to look at what Technics did on the SE-R1, no complaints about it becoming an RF transmitter using normal non shielded speaker cable, just praise for it's good sound. Perhaps because they raised frequency response only to 90kHz, i... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong Also it’s not that the higher switching speed alone make for the good sound it gets, it’s also that the "low order output switching noise filter" that all Class-D’s have to use, can now also be taken up 2.5 x higher, this then has no effects now d... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong When class D amp is switching between two discrete levels not the voltage but duty cycle is a quantity of interest and it is linear (no discrete steps). It becomes converted back to corresponding voltage thru averaging (filtering). Voltage gain ... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong Calling it a digital amplifier is a lot closer to the truth than calling an analog amp. Amplification process is still analog, hence "Analog Amplifier". Connecting amplifier to DAC doesn't make amplification "digital". | |
| Recommendation for specific amp (must have 110 /220V) switch Benchmark AHB2 has auto-ranging power supply. | |
| Theoretical question about how CD's work Most of CDPs play in real time - there is no time to read particular sector again. Ripping program can access each sector unlimited number of times to obtain right data (proper checksum). Car or portable CDPs have to make up time to be able to r... | |
| Schiit Ragnarok 2 (Fully-Loaded) / Digital USB input / No optical cbob, Airport Express, that I use with Benchmark DAC3, has some small jitter (280ps) and optical connection, that is prone to convert system noise into jitter. USB interface, as long as it is asynchronous, doesn't have this problem but might inje... | |
| Surge protector Eric, I went with Furman Elite 20PFI. One evening bulbs got brighter for a moment and Furman's circuit breaker tripped. It automatically switched back after few seconds. Furman also protects from under-voltage preventing operation outside of sp... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong One more thing (as Columbo said): SMPS are not cheap. Cost of high quality SMPS has to include high cost of development. Rowland’s supplies deliver thousands of regulated watts operating at 1MHz (and components doing this are not cheap either). I ... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong Switching amp (class D) and SMPS IS the same thing. In fact class D was discovered when engineers tried to show how responsive SMPS was by modulating it with music. I would say that it should be more difficult to build good class D amp than goo... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong Class D can be wonderful but in my experienced opinion, if it has a SMPS just forget it! Even my Mac Mini music server SMPS killed the sound, it now has a linear supply.All highly rated Rowland class D amps have SMPS. When done properly SMPS is mu... | |
| I went from Class D to Luxman A/AB - And most of what you think is wrong willgolf, My class D amp was designed to be on all the time (no power switch). I kept it on with surge protector, but unplugged it when on vacation or during thunderstorms. You could call Mola Mola to be sure. | |
| Surge protector tatooedtrackmen, It is hard to tell what is sufficient since lightning can have different forms. Nothing will protect against direct hit and everything else depends on the distance and location. More protection is always better. I decided to ge... | |
| Surge protector tatooedtrackmen, I suspect that the amount of energy circuit can absorb depends on physical size of components used (MOVs) and it might be related to overall size. Breaker is rated 10kA max current while physically larger whole house protector fr... |