almarg
Responses from almarg
| Gain vs. Volume Hi Marek,By adjusting gain, you are changing the signal level/voltage being processed by the circuitry that is at points in the signal path between the gain adjustment provision and the volume control. That can affect various kinds of distortion t... | |
| MIT Oracle MA Digital AES/EBU 07-28-12: Richard_stacyThe latest find for me is the USB cable that connects my exterior drive to my server. If you read the forums or ask and "expert" they will tell you this cable will not impact sound. Most will say the USB cable that connects ... | |
| Opinions on Reference LP Digitization System ... While I have no directly relevant experience, my strong instinct would be to use an approach that does not involve having a computer (which of course is a potent generator of RFI and digital noise) either directly connected to, or physically close... | |
| How much power is enough for B&W Nautilus 804's? Good comments by the others. Some additional thoughts:1)If the impedance curve of the N804 is anything like curves I have seen for some of the other Nautilus models, such as the 801, the 4B-ST will most likely not be able to drive their woofer sec... | |
| Best interconnect between pre-amp and CD player?? One thing that might help to reduce the degree of randomness and the amount of trial and error in the process would be to search "virtual systems" for the specific make and model of the two components that are being connected, and seeing what kind... | |
| Sub Woofer Hum... This One Puzzles Me Hi Scott,I still feel that the things to try are the short on the unused input, and the resistor on the used input. Or, alternatively, a resistor on both of the inputs.Best regards,-- Al | |
| Amp preamp impedance matching...can anyone explain? 07-24-12: DistortionsDoes the voltage gain play into this at all? No, gain and impedance compatibility are two separate issues, although if the amplifier's input impedance is too low in relation to the preamp's output impedance (which it is not in... | |
| Magnepan Service HORRIBLE??? 07-24-12: OnemugI was ready to take one of my vintage tuners to a repair shop for some dial lights....Harry, if that is your 10B, you can easily replace the lights yourself. It takes 2 type 1847's. Here is one source.Sorry to divert the thread.Reg... | |
| Sub Woofer Hum... This One Puzzles Me Hi Scott,I have no idea why Richard would consider shorting the unused input to be inadvisable, as long as the connection is applied several minutes or more after power has been removed. The sub would see the short as a zero volt signal being appl... | |
| Fuses that matter. 07-23-12: NonoiseThere is enough anecdotal evidence around for any naysayer who hasn't tried a high end fuse to readily accept the fact that we do hear a difference.True. But, as I suggested earlier, how do we know that comparable differences woul... | |
| Which cables cause issues for high bandwidth amps? Correction: I misread the Goertz datasheet. The capacitance of the MI-2 is 950 pf/ft, which is still very high of course.Marakanetz, the high capacitance is a side effect of their approach to achieving their primary design goals, which were ultra-... | |
| Which cables cause issues for high bandwidth amps? I want to see if I understand correctly that the spec that is the culprit in inducing these oscillation problems in amps is capacitance?Yes.And that as long as I keep that spec under 300-400 pf/foot, I am OK?For typical lengths, say up to 12 feet... | |
| Which cables cause issues for high bandwidth amps? Cables having ultra-high capacitance are the ones that can cause the problem you experienced, if they are used without a properly configured Zobel Network. I believe Goertz can supply those networks, for use with their cables.What "ultra-high" mea... | |
| Amp preamp impedance matching...can anyone explain? Vineman, since the worst case (20 Hz) output impedance is known, just multiply that by 10 to calculate the minimum desirable amp input impedance.495 ohms x 10 = 4.95K (minimum)Nearly all power amps will meet that criterion.Regards,-- Al | |
| Strangest problem I've ever had Damage a separate connected preamp? Maybe Al could expand on that.....Hi Jim,Assuming that both components have 3-prong power plugs, as you realize the short would result in a direct connection from the "hot" output terminal of the amp to the chas... |