A neat loudspeaker experiment (with a moving diaphragm) is to change the Fs of the speaker using small weights on the dust cover (the small cover in the center of the diapragm). Buy two identical INEXPENSIVE drivers and show how the response changes. Amazingly, it can even be calculated...

This makes clear the other thread - Oh well... An output stage of a power amplifier is basically a trans-admittance stage. What this means is as follows: The output impedance is high (NOT low) Therefore, it controls the current to the device. The amplifier converts a low voltage signal at...

I think tailspn is referring to that some amplifiers are voltage devices (and therefore have low output impedance). Examples are devices used to power electrostatic drivers. Regular power amplifiers for magnetic voice coil systems are generally trans-addmittance stages (i.e. Voltage to Current...

The play (about a soldier who is forced to sell his body to scientific experiments to support his mistress and child and pays with his mind) has music and songs by Tom Waits and was directed by the Avant-Garde director Robert Wilson. The play is currently playing (for 5 more days) at UCLA...

I agree with adrzejpw. It depends on what you are listening to. Headrooms processor does not influence recordings that are made with 2 microphones in an acoustic environment - see ma recordings e.g. Calamus the splendor of al-andalous. However, on subpar or average recordings (where you have...

It is interesting that a movie that is so valley (San Fernando) centric will interest those outside of the valley. I worked in a building next to La Petit Chateau (where Sandler ruins the Bathroom), a small french place on Lankershim. Perhaps if you are not from the valley, you would not see all...

Happy Birthday Todd

Does anybody know of another Sony product that was manufactured for 12 years??? A TV perhaps? PCDP? Toilet seat warmer? Video game console? I thought the Japanese law required manufacturers to set fire to their design plans every 6 months (in a corporate sponsored bonfire).

My favorite cookware list: Le Creuset for Dutch ovens and enamelled pots and pans (also make Screwpull - the best wine bottle opener I tried) Calphalon for stainless stock pots and non stick pans for omlets and pancakes (although Berndes are better) Mauviel for Copper pots and skillets...

2000mAh at www.batteriesamerica.com Those extra 200mAh are lifesavers...

112 deg. F is hot? Seriously, my class A back home runs at almost 100 deg C (Japanese TO-3) for many years. Can cook eggs on them. Fans just add noise...

Quote: That is, put a stereo test tone CD in and run each signal through the pot and measure the signal with an accurate AC voltmeter. This tests the behavior of the pot under real conditions -- it's a test for the behavior you're actually interested in instead of testing the mechanism that...

You will need 6 batteries of 1.5V each connected in series (for 9 Volts). You will need a battery holder (Radio Shack), suitable plug (radio shack) and cable.

This is the time to start disconnecting circuit sections and testing continuity to ground. BTW, if I were you, I'd find the short and fix it. If you connect to an ungrounded socket and your neutral wire disconnects, you may have the 110V single ended on your headphone ground (not as much fun...

Neruda, These were Fostex full range (remarkable sound for their size). The speakers had tripod legs that were potted in special sand. AssafL.

Kelly, I agree with everything Markl wrote (especially the fact that you compare the best of 50 years to the last 5). However, even where plain genre is to be discussed, I'd say there is much new under the sun. Only in the past 20 years has postmodernism preoccupied cinema to such an extent...

Speaker stand? Saw vaguely similar stands in Japan (for small Fostex drivers).

About ATRAC-S From Minidisc.org (originally quoting the Sony fact sheet): The two new products MDS-JB980 and MDS-JE780 in the press announcement at CeBIT both adopt the newly developed DSP (Digital Signal Processing) IC chip "CXD2664R." The CXD2664R chip has two DSP functions; one is ATRAC...

Is that a bias current meter up front? Also, it has a pushbutton snap action switch (temporary, I think) above the power switch. Mute, perhaps? Anyway, kinda looks heavy to be portable. But it should give you plenty of listening time...

I find that it depends on the recording. E.g. MA Recordings use two Microphone capsules to do real stereo field recordings (usually in highly reverberant surroundings as well). In these, diffuse field recordings, CF does not improve imaging and may cause some loss of HF details. Regular...

A regular Y cable may load your source too much. What you need are two identical resistors (about 1k Ohm should suffice). Connect the right output of your source to one resistor and the left output to the other. SOURCE R ____/\/\/\________ INPUT R SOURCE L ____/\/\/\__/\_____ INPUT L...

On a more serious note: 1. I would guess Zobel networks are more of a necessity in Loudspeakers due to dips in crossover response. Headphones are high impedance and (usually) should not require a Zobel. 2. Looking at your diagram: Isn't the ground impedance a bit on the high side? As well...

Is that a chocolate bar on top of the amplifier? Must keep chocolate warm and soft

I see the point all of you are making. There are still a couple of issues that are not explained: 1. The RIAA does not make money. It is the record labels that make the money. 2. Artists need the labels. Specifically the unknown artists. As radio has got the payola system up and running again...

Actually, there are other solutions out there, that will fund new and popular music. It is called branding, and it is how television got started. It has relatively few drawbacks. Brittney Spears is now singing about Pepsi. You can imagine a world where songs would be about merchandise...