atmasphere
Responses from atmasphere
| L-Pads. Speakers Awful Without Them, New Ones Ordered If you have a treble control on your preamplifier, which I might guess you do have on the Mac MX110, then you can achieve much the same effect as with an L-pad. @lewm This isn't correct. The preamp treble control won't control the tweeter outpu... | |
| Class D I don't see the potential dead times being similar as Qrr is a significant contributor of the dead time requirement outside of basic MOSFET switching performance. That's the body diode thing I mentioned. | |
| Class D Stop trying to divert that you were very anti GaN, and now pro just because it will be "the format" and suit your sales/profit modeling. Actually you’re hard pressed to find me being ’anti GaN’; that statement is false. What is true is that I did ... | |
| Atma-Sphere Owners, MP-3 Upgrade Yup when I bought my MP3 dealer talked to Ralph who said resistor package really not worth the $$$.To be clear on this, what I tell people when they ask is as @pstores described- this is one of our more expensive options and offers the least 'bang... | |
| Differential Balanced Sound Quality The term is commonly used both in text books and the professional recording environment as shorthand for the inverted signal in a balanced pair..It is and many people are confused by it! I apologize if you see this as being patronized, that was no... | |
| Help with noise in ONE speaker You can clean the control if its a slider from the front. You'll need a particular cleaner- DeOxit in the green and black can (available thru Amazon and ebay, link to product below). Reach the nozzle into the slot at the top of the slider in as fa... | |
| Differential Balanced Sound Quality So if I start with a conventional amplifier block with an inverting and non-inverting input and a single output. A single ended amplifier input might be a 100Ω series resistor followed by an RF filter & DC blocking capacitor, in non-inverti... | |
| Differential Balanced Sound Quality A related question that has been bothering me. If your circuit isn't perfectly duplicated after signal splitting, doesn't this introduce timing errors upon recombination? @cal3713 No, at least not at audio frequencies and beyond. Timing become... | |
| Differential Balanced Sound Quality There is a reason: In most consumer (and professional) amplifiers the balanced signal is dealt with at the input by a differential amplifier necessitating the need for a series resistor on the inverting input. In the worst case the diff amp is the... | |
| My really dumb tube mistake(s) The process is ongoing. The new tubes have about 75 hours thus far.I’m hoping for the revelation to reveal itself soon.@tvad If you're already at 75 hours, you're hearing it. Have you replaced the input tubes? They can have more effect than the ou... | |
| Help with noise in ONE speaker Have you swapped the interconnect cables left for right at the input to the amp? Try that; if the problem does not move then the amp is at fault.If the problem *moves* then the preamp is at fault (the noise is unaffected by the volume control, so ... | |
| Differential Balanced Sound Quality Alternatively, the balanced equipment discussed above separately amplifies the positive and negative parts of the electrical signal. This requires double the circuitry because you have to amplify two signals (0-to-positive and 0-to-negative) i... | |
| Class D And Ralph search is your friend, you might want to be reminded, that you were anti GaN fets way back at first, they are still the same ones buddy. You are quite correct. When you first commented that GaNFETs didn't need a heatsink in an evaluati... | |
| Differential Balanced Sound Quality The bit that a lot of people are unaware of is that balanced inputs are actually noisier than single ended (RCAs etc.) in that they utilise relatively high value resistors that introduce their own (johnson) noise into the signal.This statement is ... | |
| Strange buzz issue! @jea48 is correct. When this amp was built it had an ungrounded power cord. Someone replaced it and now the amp is grounded to the building electrical ground (per EU Directives). The trick is to have the audio ground of either the amp or preamp be... |