tonywinsc
Responses from tonywinsc
| vibration control Here is something that I have wondered about. I have not opened up a lot of high end speaker cabinets, but the few that I have peered into all have crossover electronics boards sitting unprotected inside the speaker box. It would seem to me that t... | |
| Speed of groove. You can us the math to help understand it. Take a 1kHz waveform again for an example. At the outer groove, the velocity is 20.1"/s. So 1000 (cycles/sec)/20.1 (inches/sec)= 49.8 cycles/inch. Now at the inner groove the velocity is 8.7"/s so the sam... | |
| Voltage Level at speaker terminals If your preamp is set for CD input do you get the same results? How about when the preamp is off and the amp only is on? Also, you say that you see higher amperage at the speakers. Just to clarify, you have put your multimeter in series with the s... | |
| Using Test LP - curious observations In a different post talking about tt speed accuracy, I was feeling ambitious one day and did some measurements and the impact of the record hole center on Wow and Flutter. My test record has about 0.8mm of eccentricity between the center hole and ... | |
| Speed of groove. The linear velocity of the groove at the stylus starts out at about 20.1 inches/second and finishes at about 8.7 inches/second. That is based upon the following: 33.3 rpm, outer groove 5.75" from center and inner groove 2.5" from center. It is a s... | |
| Using Test LP - curious observations Personally, I do both. I check my set-up with a test record but my final adjustments are done by listening. I set up my new cartridge and align it with a gage. Then I set a nominal VTF and VTA. After that, I use the stereo test record to check the... | |
| Using Test LP - curious observations Keep in mind that the channel balance of phono cartridges is in the 1-2 dB range. So you are bound to hear something on the mono test. I think the intent is to find the minimum level which should be at the optimum geometry point. I perceive just t... | |
| Hey Electricians - Please help Sounds like a ground issue. Easy no cost check: First, pull the PS Audio out of the circuit and see if the pop persists when turning the light on/off. Next, if the pop is still present, back up to the RGPC 400 and pull it out of the circuit and se... | |
| William Z Johnson RIP The end of an era. My mom preceded him by a few months in passing. It's not a loss. Their lives were our gain. | |
| DCM Time Window 7 - AMP & PREAMP Ok, 3dB is double the Sound Intensity. It is still correct that it takes about a 3dB change in Intensity then, to perceive a change in sound level. 6-10dB which is double the loudness is a very big change. Think about normal conversation- it is 40... | |
| Amp for Thiel CS 2? I had a buddy in the late 80s who used Spectral gear with his 2 2s. They sounded fantastic. His system is the reason I eventually moved to Thiel speakers. That is in spite of hearing them in a couple of different stereo stores where they sounded t... | |
| DCM Time Window 7 - AMP & PREAMP Just to clarify something- a 3dBa increase in SPL (Sound Pressure Level) is double the loudness. dBa is a log scale so amplifier power must double in order to double the loudness of the speaker. It takes a just about a doubling of the loudness for... | |
| Turntable speed accuracy Your timeline device is averaging speed. It is not giving you an instantaneous reading. The laser pulses every 1.8 seconds. As long as the turntable achieves one revolution in 1.8 seconds, the laser spot remains stationary. Your turntable could be... | |
| Turntable speed accuracy Runout is the measurement of the eccentric motion in a rotating body. What I have been talking about in terms of a record is that the center axis of the record grooves are not matched precisely to the center axis of the platter. (Shaft runout woul... | |
| Turntable speed accuracy I filed the hole in my stereo test record. I improved the runout a bit. According to the iPhone app, I now have the raw Wow down to +/-0.16%. The filtered didn't change, -0.01%/+0.02%. The total spread within the published specs for my tt. With a ... |