kijanki
Responses from kijanki
| How important is a Linear Power Supply Versus a Switcyed one? Any power supply introduces noise. Linear PS is also switching (at max voltage). The question is how much noise? They had to have a reason to implement SMPS. Switchers are usually used for their efficiency when high currents are required or fo... | |
| Damping Factor - Interesting article but the low DF will in many cases be better.How low? For electrical damping of 8ohm speaker difference between DF=10 and DF=100 will be like 6.8ohm vs 6.08ohm (assuming 6ohm as resistance of 8ohm coil). It is about 12% difference in breaking cur... | |
| Buy a new CD transport? Don't touch it, if it works perfectly. The only thing, sound-wise, you might gain is lower jitter - most likely inaudible, since Benchmark DAC3 has very strong jitter suppression. | |
| How important is a Linear Power Supply Versus a Switcyed one? Both are switching producing high frequency noise, but SMPS done poorly can be really bad, much worse than linear PS. On the other hand SMPS can be much quieter than linear PS if designed for low noise (zero current, zero voltage switching). Jeff ... | |
| Any alternative to Radio Shack sound level meter? mijostyn, thank you. I know there is something wrong with my room response, but I will fix it later. At least I have tool. My room is too reflective. I don't hear any particular resonances but listening louder makes sound less clean. It is mos... | |
| 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... |