atmasphere
Responses from atmasphere
| Anybody use a single ended component with one that is balanced? I’m not an electrical engineer but a lot of amps have the balanced outputs at plus 3db. Not sure why or how, perhaps to compensate for long cable runs that the balanced lines are designed for, but it’s a fact of life and sometimes needs to be add... | |
| Guess How Big My Speakers Are If the amp has a high output impedance the speaker might have a much higher output in the bass resonance area than one would expect. Nelson Pass demonstrated this at a RMAF about 10 years ago using a current source amp and open baffle speakers. T... | |
| Anybody use a single ended component with one that is balanced? Balanced pre & amp will provide 6db additional gain and reject noise. @sbank If the balanced line standard is being observed, this should not happen! Yes, balanced is a bit louder… one small turn of the volume control, no difference in ... | |
| Why do my bass drivers shake violently listening to vinyl It is always 10" or below and always with turntables. With many amps going clear down to DC surface irregularities in the vinyl will cause the woofers to flap. @mijostyn Back in the old days I used to run some Fried G2s which had a 10" IIRC and... | |
| SET Shootout China VS The USA Upon introduction to a good DHT SET some listeners find a purity, aliveness, transparency and most importantly a genuine deep emotional connection with their music listening experience. These traits were found lacking to some degree with their pr... | |
| Best cost no object tube phono @reimarc Since the hum has been in two phono sections so far, I am suspicious they are not the problem. It might be that there is a problem with the tonearm cable and/or wiring. Or it could be an issue where the phono section is too close to a h... | |
| How important is the cable between the SUT and phono pre? However, transformers do not reflect secondary load C to the primary. @jpjones3318 Transformers transform impedance and impedance includes capacitance. However, things are not as simple as just that. You have to also consider how a paralle... | |
| SET Shootout China VS The USA Why did you use EL95 in ultralinear mode? Why you didn’t use 2a3 or 45 tubes for your push-pull amp? @alexberger I’d already built the PP 45 amps and they were rather large. One problem of DHTs is you have to run DC if you want the output sec... | |
| SET Shootout China VS The USA The new OP Q is KT series tubes PP I've been exploring SETs for nearly 30 years. I started with 300bs, then it was the 2A3, finally the type 45. Then I decided to see how a PP 45-based amp would sound and it ran circles around the SET version-... | |
| SET Shootout China VS The USA KT type tube offers wonderful colors, imagery, low distortion, no coloration, no fatigue. I know this fora fact hearing the DEfy7. Jadis Is not the only one to make amps based on the KT88. You might want to hear a Harmon Kardon Citation 2 prio... | |
| Why do my bass drivers shake violently listening to vinyl It is the nature of the vinyl format to have this rumble. This statement is misleading. The LP itself should be quite free of rumble. I purchased the KAB rumble filter. @audionoobie It sounds to me as if you have a mismatch between the arm ... | |
| Why oscillation occurred within my amplifier circuit? One issue is that nearly any opamp will have some DC offset at its output unless very carefully controlled! I'm assuming that your Vcc+ and Vee- voltages are not regulated. I would not attempt to run this without current limiting resistors in the... | |
| How important is the cable between the SUT and phono pre? looking at transformer equivalent circuits I don't see reflected capacitance. Reflect impedance, reflected leakage inductance, but not capacitance. Do you have cite for this? @jpjones3318 Transformers are called that because they transform impe... | |
| SET Shootout China VS The USA **the 2A3 PP is just 1 of many options, 1 circuit is not superior to any other..** BALONEY. Just a simple one size fits all platitude. The 2A3 PP is superior to any and all KT circuits. @mozartfan If you run a KT88 UltraLinear, using an o... | |
| I had a question related to Class D It seems odd to me that a manufacturer would post output specs at 10% THD. Who cares? Why wouldn't they publish specs for a listenable THD? The chips are not meant to be 'high end' FWIW. 100 watts is where the amp clips and at that point its m... |