kijanki
Responses from kijanki
| Do amplifiers deteriorate if not used? Yioryos - I just assume your ML27.5 has linear power supply. If it has SMPS it will not do anything (start) to about 70VAC then it will put full operating voltage on the caps. | |
| Class-D amps - a different re view Muralman - people are often confused and becuse they like guitar sound on 30W Vox (remeber The Beatles)with tubes and no feedback (high thd) and want their home system to be like that - close to real performance. Home system of course should not c... | |
| Do amplifiers deteriorate if not used? Gs5556 - I suspected it has something to do with overvoltage. I read somwhere about hydrogen release (and explosion) in dry aluminium electrolytic caps.On the other hand datasheet of the few brands I checked show shelf life only 1/2 of load life a... | |
| Class-D amps - a different re view Muralman - I have no experience with high end DAC circuits but my Benchmark has surprisingly clean and transparaent sound. Part of this is due to anti-jitter circuitry. Jitter produces sidebands of very low amplitude (typicaly -80dB) but very audi... | |
| Class-D amps - a different re view AtmasphereQuoted current - as I said before is the peak current and has nothing to do with average power. It is used to show how well amplifier can respond to impulse. Internally my 200ASC Icepower can deliver 48V to speaker what would make at 3 O... | |
| Class-D amps - a different re view SimontjuAmp is close to 95% efficient and does not have to be large to do so. "thermal dynamic variations are present in performance" - thermal dynamic variations of what? This is still jibrish to me.Let me place here results of test made by someb... | |
| Class-D amps - a different re view Ar-t I agree absolutely. Synergy is probably one of the most important things.I respect people who can honestly say "I don't like it" even if it costs $500k, but I don't care much for blindsided people who try to present pseudo-sientific reasoning... | |
| Class-D amps - a different re view BranimiI'm not from Italy either - cannot understand a word.My Icepower (200ASC) has DF=30 at 10kHz (nothing unusual about it). At 1khz DF=1000 and climbs to 4000 at 10Hz. | |
| Class-D amps - a different re view AtmaspherePeak current I mentioned is the current limit of the amplifier output to speaker. 20A means that my amp can put that much current on the speaker. Nothing unusual - many amps have similar spects. It is rated 100W at 8 Ohm and 200W at 4 OH... | |
| Class-D amps - a different re view Muralman1ICE modules do not sample - they have analog sinewave oscillator/modulator converting input voltage to duty cycle and drive output switches (Mosfets). They resemble now more of sigma-delta modulator. Hypex is also analog and probably most... | |
| Class-D amps - a different re view Just one more comment to pnt. 17 - I said I cannot understand what he's saying. It looks like he things there is up to 70V of constant DC voltage on the speaker terminals???? Please help me to understand this!! I don't know what bothers me more cl... | |
| Class-D amps - a different re view Elberoth2 - jus shortly9. "Use steep low pass filters to limit the upper high frequency range, partially negating the purpose of wider bandwidth, e.g. SACD, source material while resulting filter phase shifts may be audible in the working band"Don... | |
| Class-D amps - a different re view Eleberoth2 - let me follow on this. In point 3 he mentiones up to 2V of 50kHz frequency on the speaker cables - complete nonsenese - unless he talks about normal audio signal (my Rowland ha -3dB at 65kHz).Point 4."Make the output impedance, a pass... | |
| Class-D amps - a different re view There are 3 kinds of switching noise in Class D amp:Carrier frequency - approx 0.5MHzSwitching spikes of output Mosfets - approx few nsSwitching power supply frequency approx 50kHzCarrier has very little chance to get thru linear power supply with... | |
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