atmasphere
Responses from atmasphere
| Reverse Phase Preamp with HT Bypass Phase makes a difference if the recording uses a minimal mic recording technique- either 2 or 3 mics (if the third mic is a center channel).If more than that are used, valuable phasing information becomes jumbled and the effects of absolute phase ... | |
| Calling all Horn lovers Kiddman, I agree that if there is a problem in the design you will have anomalies, just like you do with any other speaker.If the horn design is correct however, it can be one of the lowest distortion loudspeaker applications out there. So with th... | |
| Tube Amps and Friendly Speakers - Back Impedance Bruce, I have set up systems plenty of times where we did something like that.For example we had a set Sound Lab Dynastats about 20 years ago where the amps played the woofer just fine, but were rolled off on the ESL panel. So we installed an auto... | |
| Stylus Rake Angle I'm still wondering why, if slant angle varies not only from record to record but by the signal itself, by a cutter who's VTA is for all intents and purposes static, does cartridge VTA/SRA need to match VMA?The SRA of the cutterhead does not vary ... | |
| Calling all Horn lovers but I do know that this arrangement does not have the dreaded horn "shout" or any other colorations that to my ears identify it as a horn.IME this is the result of using the wrong kind of amplifier on the horn, rather than something inherent in th... | |
| Tube Amps and Friendly Speakers - Back Impedance Hi Bruce, If you want a general rule of thumb for hooking up a speaker to your amplifier taps, look at the impedance of the speaker in the woofer region. The majority of the amplifier power and distortion will be made in the bass region, so its be... | |
| Stylus Rake Angle Which type of lathe do you have?Its an old Scully (well, *all* Scully lathes are old...) equipped with a Westerex 3D cutterhead. The cutterhead does not need a lot of power and has a moderate impedance, we are easily able to drive it with our M-60... | |
| Stylus Rake Angle But when the cutting stylus records any signal other than a pure mono one it must move more and less deep into the lacquer, otherwise how can the signal be cut? That was what I was getting at and confused by your answer. I didn't mean the whole me... | |
| Stylus Rake Angle Sarcher30, it might, but if so it would be very very slight! If you look at any lathe you will see at once that they are built to be quite sturdy and machined to exact tolerances. Thus the cutterhead mount is exactly perpendicular to the platter s... | |
| Tube amp heat questions... Swampwalker, actually I agree with you on those 6C33s. They run the hottest filaments of any common power tube these days! | |
| Stylus Rake Angle Surely the groove depth changes with signal? A right channel signal for example must cut into and out of the lacquer at 45 degrees. I can see that a heated cutting stylus will help the process, but then does that affect the final profile as the ma... | |
| Stylus Rake Angle From what I understand, the cutter head angle may be a particular value, but the resulting profile on the record is different due to the springiness of the lacquer material which varies with temperature, such that the resulting optimum SRA is not ... | |
| Tube amp heat questions... Bcgator, air conditioning is a brute-force method of dealing with heat. In the old days people simply had vents in the ceiling. A simple solution, inexpensive and one that works really well. Even in the 21st century, heat still rises :)You will fi... | |
| 4 OHM speakers with an 8 OHM amplifier? Be careful with the volume control! Those B&Os were probably not expecting to see a lot of power- power was really expensive in the 1960s... | |
| Stylus Rake Angle Doug and Csontos seem to have the way of it.The cutting stylus on an LP cutterhead only does about 10 hours before it needs to be replaced. You'd think they were all exactly the same but after replacement you wind up resetting a lot of parameters ... |