ramtubes
Responses from ramtubes
| Does anyone care to ask an amplifier designer a technical question? My door is open. @teo_audio They left shaking their heads because when they compare the same preamps one at a time they "think" they hear big differences.They do hear big differences at home. No doubt about it. Long term listening does reveal bigger differences... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @tomic601 Also on the subject of heat.... this is NOTHING compared to creating a beast like the 787stick to principles, there are different approaches to solving problemsi like the emerging theme from Eric ( Bdp24 ), Ralph and RM about early aud... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @cakyol I am also looking for a lab/bench symmetric power supply of up to +/- 100 volts DC at about 2 - 3 amps (so about 500 - 600 watts) and having a very difficult time finding it. The very rare ones I have seen are in excess of $1500. I ne... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fsonicsmith Well, I lied. I have to respond. Ralph-I can't believe that you said that about me after I have done nothing on this Board (in multiple threads) but praise you and after you agreed that preamps are not easier to design (well) than a... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @bdp24 Yow, things are warming up around here ;-) . I like opinionated people, it requires and reveals passion. That’s true even if I see things differently; no two people agree on everything, and everyone develops their own priorities and taste... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @iaelas The solder joints just fall apart from vibration.Interesting. My Force is still going strong after 15 years. Pre ROHS.Two good questions for sub makers :)Another is "Why provide such useless controls?" Many subs are clearly not designed t... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @atmasphere We get pretty high figures and we do it with a tube.... As a hint, look into 2-stage CCS circuits. You aren't going to get good numbers without a decent CCS, a resistor or a single-stage CCS won't hack it.Of course i use good CCS, wh... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fsonicsmith I believe as does Ralph evidently that it does no good to have a great preamp and a mediocre preamp. would you like to fix this sentence? did you mean one of those to me power amp, not preamp? Look i know ive stirred you up, but yo... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. Im not going to go too far with the preamp vs power amp ease of design controversy. Everyone is parroting back the party line, which I disagree with. I did a shootout for phono stages for our local audio society. It was a strict A/B. We had severa... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @maplegrovemusic Roger - What brand and model subwoofer do you use ?Its of my own design. It is very smal,l less than 1/3 cu ft. Therefore its corner frequency is 100 Hz and falls off at 12dB/octave. In the crossover I EQ it up at 12dB/octave so... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @kellydreams . I did try a passive preamp in the main system recently and did Not like how it made the system soundNot knowing the passive and what is was driving, including cables I would say this: I have no problems with passives. If one thin... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @fsonicsmith And while a solid state input stage may very well offer better measurements, where is the proof that it sounds better? At the end of the day, isn’t it indisputable that it is cheaper to produce and less complicated?Are you saying a... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @bdp24 The J’s midrange (provided by the available-separately Model 80) was great by itself (unusually transparent for a cone speaker) Thanks for reminding me the model number of the 80. For others who dont know the 80 was a full range speaker,... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @almarg . I recently changed to a Pass XA25, which is specified as a class A amplifier rated at 25 wpc into 8 ohms and 50 wpc into 4 ohms. Per JA’s measurements, though, it is capable of 80 and 130 wpc into those impedances. I presume that most ... | |
| Does anyone care to ask an amplifier designer a technical question? My door is open. @almarg Correspondingly, at my 12 foot listening distance I have measured peak SPLs on those recordings of close to 105 db, with the softest notes being in the vicinity of 50 db. I used a Radio Shack digital SPL meter for these measurements, set f... |