atmasphere
Responses from atmasphere
| 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... | |
| SET Shootout China VS The USA @mozartfan Just so you know, that 5% figure is for the tube alone; it does not include the rest of the circuit of an SET. The distortion of that at full power is more like 10%. If you really want to hear what almost any SET does, you need a speake... | |
| Default standard for speaker "sensitivity" measurement listings? Anechoic? In-room? Other? Speakers which play nice with tube amps Tube power is more expensive. That is why horns were so common in the 1950s when tubes were King. So you’re looking for a speaker with sensitivity in the low 90s at the very least, higher if the room is b... | |
| More expensive = better? It seems to be common for people to feel that if you cannot afford something then it cannot be worth the price and anyone that has enough money to afford it is a fool or not very smart. Which of course is not true. While you can add nearly unlimi... | |
| Technics SP-10mk2 oscillations Without the platter, the rotor oscillates at high frequency and amplitude while turning at 33rpm. At 78rpm, the oscillations are much less so. With the heavy platter on, oscillations disappear. No gridding noises, etc. @rays19 The servo 'hunts... | |
| Spatial X5 speakers @jaymark Nice speaker! Its easy to drive so you have a lot of amplifier choices available. | |
| Is Room treatment different for Horn Speakers? @coachpoconnor You should be fine. If you experience any harshness, try toeing the speakers in a bit. The horns have controlled directionality, and so that can be used to minimize side wall reflections, which the ear interprets as harshness. |