atmasphere
Responses from atmasphere
| AES48 , is there a test to determine? It was partially your high opinion of the HPA4 that lead me to try purchase one. Since the HPA4 is AES48 even though it has both balanced and single ended outputs without a switch (please comment Ralph)Without a look under the hood I suspect tha... | |
| Modern amp solution for Magnepan 2.7QRs with bluetooth and phono stage interfaces? If you get separates, which often work better with Magnaplanars, then what you need would be a power amp for the speakers, and the bluetooth and phono functions could be handled at the preamp level. But any preamp would do fine if a bluetooth rece... | |
| Red Plating?? Interesting, the manufacture designs an auto bias amp around the kt88 tube and then recommends the user to use 6550 tubes. Functionally they are nearly the same. No-one makes 6550s anymore; KT88s work in all the same places. But a 6550 will be a v... | |
| Class D No because it's only to get the low order output filtering on the speaker output up high also, so then you can get rid of "all switching noise" without effecting the phase integrity down into the audio band. This has been explained ad nauseum; t... | |
| Speaker sensitivity vs SQ There are a lot of examples when amplifier has mixed SE and PP stages.For example some SET amplifiers have first stage SRPP and PP amplifiers have SE first stage before phase spliter.Another example - SE preamp and PP amplifiers.Do all these ampli... | |
| Class D I don't see anything in Cyrill Hammer's bio that would suggest the extensive knowledge in signal processing or advanced control theory or even ultra high speed switching for analog reconstruction that would make his opinion any more valid than ... | |
| AES48 , is there a test to determine? Yes. If you have an amplifier with a single-ended input, use an XLR adapter that connects only to pin2 and pin1 of the XLR output of the preamp. NOTE: pin 3 should **not** be connected for this test. Connect to the amplifier and listen to the resu... | |
| Newbie Can't Decide Which Tube Amp @ckenrIf If you really want to use a tube amplifier I would consider different speakers unless your room is very small. 87dB is low efficiency and you'll need about 240-400 watts in most rooms to get realistic levels with any musical genre. Ther... | |
| Class D Cyrill Hammer is a good designer but entirely mistaken in his comment you quoted. When class D amps (Purify) are making distortion that is 120dB down, it is serious cutting edge; lower distortion than the Soulution amps. Again, you need extraordin... | |
| Class D Yes like the ones and their lackies pushing yet to be released commercial products, with fanciful claims that will only be proved right or wrong "if" given access to by independent measurement testers.To be clear here, the 'fanciful claims' were... | |
| Hiss from speakers that increases as loudness control is decreased The preamp needs service. The first thing if servicing this that I would check would be the power supplies- making sure the filter caps are fresh, and that the regulator isn't oscillating. If that did not sort it out I would be looking at the circ... | |
| Class D Every one knows "global feedback" is not a good thing in any amp, it’s a "sound sterilizer" and should only be used very sparingly if possible, just to clean things up a little, and preferably use only "local feedback". Which won’t help your pl... | |
| Speaker sensitivity vs SQ @phusis The T-1 has a 250Hz horn, using a 4" compression driver that is field coil powered. The diaphragm is made of beryllium and employs a Kapton surround, which is how it goes so low without breakups. I don't know the spec on the T-1 but I do k... | |
| Speaker sensitivity vs SQ Some of the older Horn loaded speakers like Altecs and JBLs that I had a lot of experience with when I was young were all very colored. Back then K horns were the best but they did not image well and though not as colored as the other horn spea... | |
| Speaker sensitivity vs SQ @mijostyn I don't know about Curl's designs so much, but Nelson does make fully differential amplifiers so he is able to take advantage of the lower distortion afforded, and yet have a nice 3rd to help mask the higher orders. |