Recent content by gianluca68

Self noise=21dBspl...

That's right. They started with power levels, then 0.775V was the voltage of 1mW/600 ohms, but afterwards they used the voltage regardless of the impedance, then they kept the same voltage level: 0.775V; neverthless, the standard level of consumer audio is -10dBV (316mV). The 600 ohms standard...

About impedance and sound: the input impedance of a preamp or a mixer should be some times higher than the mic impedance to have a low signal attenuation (it is a voltage divider), but a too hogh input impedance raises noise. Then, common input impedances are about 2.5kohms. I noticed a little...

As already said, 600 ohms is only an old standard. Today, microphone's impedance is about 250 ohms and standard Shure microphones are designed with a low impedance/low output coil and a little impedance transformer in the body to get higher signal with an impedance of about 250 ohms. Latest...

The lamps could be replaced by a bit of a LED strip: https://www.veekaylight.com/product/12v-flexi-led-strips-2835-240-leds-10mm-warm-90w-ip20/ You can cut 3 leds and power them by a resistor to adjust intensity.

You only need an XLR splitter like this:

Today, as already said, you can use the phone. If you need a better quality and it can be useful for you for other recordings, you can buy a Zoom H1n for the price of a single low cost microphone.

Many people in the last years wrote about Neewer microphones saying they don't work off standard phantom power or they don't work at all! Surely they aren't standard microphones. The idea would be to make microphones working on standard 48V phantom or unbalanced 5V power, but they aren't...

Wonderful! :) For an AT825 on my Lumix camera, instead, I took only the inside of a 5 pin XLR (it is a stereo microphone), I soldered the wires, then I bent them and hot-glued. A 90° connector would have been heavier!

Those devices put a resistor between pin 2 and pin 3, raising the load to the microphone. Since a dynamic mic is like a dinamo, it has some electro-mechanical effects, braking the moving diaphragm. Then you obtain some differences in sound, i.e. a reduced sensitivity to handling noise and an...

If they say to leave pin 3 open, it is because pin 2 and pin 3 are simply two outputs with opposite polarities. It isn't a transformer or servo-balanced output. You can take the signal from one of the two pins. In a transformer (floating) output, if you take the signal from a pin leaving the...

I thought the bargain was because the seller said that it was very worn... Instead, I think he sells all defective or incomplete stuff! I have written to the seller and he offered me a 30€ discount for my next purchase! :) (but 14.90€ are for shipping...)

Good, cheap (100€) closed headphones are Audio-Technica ATH-M40X. They sound better than ATH-M50X.

They made the microphone with a high output level to get low noise at low sound levels. With high sound levels, you could need to lower the output signal.

After working two days for a total of about 8 hours, I solved the problem: the High Pass switch was a single switch, instead of a double switch! It has 6 pins, but they are 2 by 2 in parallel, then the two channels were mixed together! >:( Audio Technica mounted a wrong switch... I replaced it...