kijanki
Responses from kijanki
| Damping Factor - Interesting article Every amplifier has some feedback. Even emitter resistor is a form of local feedback. The problem with global feedback is, that it corrects with a delay (phase shift from input to output). This delay produces overshoot in time domain (odd harmonic... | |
| Cool it! amg56, Thank you - that is exactly what I was looking for and the price is low, for nicely finished product like that:https://www.acinfinity.com/receiver-amp-cooling-fans/ | |
| Damping Factor - Interesting article @douglas_schroeder I don’t question what you heard at all. My experience is none compare to yours. I merely stated, that the sound difference you heard could likely be because of less stable output voltage while driving and not because of differen... | |
| Damping Factor - Interesting article @douglas_schroeder Yes, the difference between DF=20 and DF=2000 seems to be huge, but not for the purpose of damping. Amplifier with DF=2000 has very low output impedance and will provide steady voltage (ideal voltage source) at all frequencies... | |
| Speaker cable - Atlas, Audioquest, or Tellurium Q Black 2? Acoustic Zen Satori is quite good within this price range:https://www.audiogon.com/listings/lisa2j12-acoustic-zen-satori-non-biwire-spades-termination-speakerI have biwire/shotgun Satoris. | |
| Damping Factor - Interesting article @bifwynne Benchmark selected 8 ohm speaker with 13 - 2.6 ohm impedance variation. One ohm of output impedance would reduce signal to 13/14 and 2.6/3.6 respectively. Ratio of reduced signals would be 1.286 (28.6% difference) = 2.18dB It would... | |
| Cool it! Ideal would be the fan that forces air from bottom to the top of the heatsinks. Any air speed would be much better than cooling by convection only. There are very quiet slow fans available, but positioning them might be difficult. My amplifier ... | |
| Do single output device per phase amplifiers like GamuT and Gato have technical merit Averaging of transistor characteristics, might be one reason, but it also might be easier to find better performing transistors at the lower power ratings. Practical reasons, like distributing heat evenly on the heatsink as well as easy mounting ... | |
| Any alternative to Radio Shack sound level meter? @oldears I did few frequency sweeps only, so far (results look pretty bad), but program has a lot of tools: It includes tools for generating audio test signals; measuring SPL and impedance; measuring frequency and impulse responses; measuring di... | |
| Any alternative to Radio Shack sound level meter? I got UMIK-1 (USB microphone)https://www.minidsp.com/products/acoustic-measurement/umik-1Then I downloaded Room EQ Wizard (free program):https://www.roomeqwizard.com/When you enter microphone serial # it downloads calibration data. It contains t... | |
| Do speakers take time to warm up? Speaker coil resistance can easily change by 10% or more after warm up. It will affect crossover design and I'm very surprised, that people ignore it, discussing "crossover charging" instead. Also, to people who cannot hear the difference - you... | |
| Do speakers take time to warm up? My mid-range and tweeters have ferrofluid. I suspect that warm or hot ferrofluid behaves differently than cold ferrofluid. Also hot speaker coils have higher resistance. For copper it would be 4% for every 10degC. Drop in power is negligible, ... | |
| Simple question, or is it... Slowly moving electrons represent electric current at DC. Electric current is amount of electric charge passing, per second. For the current to be 1 ampere electric charge of 1 coulomb (6.242 × 10^18 electrons) has to drift for 1 second (thru the ... | |
| Simple question, or is it... +1 cakids | |
| Simple question, or is it... So the speed of the electric charge flow in a circuit is dependent on the connected load. The greater the load the faster the speed of the electric charge flows through the circuit. The speed of the electric charge is the same speed as the electro... |