- Posted by Mcanderson on Thursday 14 September 2017 - 10:51:35
...here is sufficient current available to drive the speakers. (The tiny ICs in your phone will drive a pair of headphones, but if you tried driving a lo...
- Posted by Mcanderson on Thursday 14 September 2017 - 10:51:35
hazmat made a good point regarding the power level;
in a quiet environment 1W audio into a good loudspeaker is loud enough, typ. 85 to 90dB SPL
bu...
- Posted by Conundrum on Friday 08 September 2017 - 05:25:33
...
Divert a portion of the audio power driving the speakers, to charge one Li-ion battery.
Use another Li-ion battery to power the amplifier. ...
- Posted by klugesmith on Wednesday 30 August 2017 - 02:20:07
...influenced by this. Initially the air won't reach plasma temperatures, when it grows. But it will become warm enough to lower breakdown voltages. A te...
- Posted by Physikfan on Sunday 27 August 2017 - 12:26:35
...as a calibrated sound source ?
I've not used speakers to measure microphones but I have used microphones to measure loudspeakers,
(microphones ...
- Posted by Physikfan on Sunday 27 August 2017 - 12:26:35
In 1976, we did a lot of speaker testing using Bruel & Kjaer gear . The pickup was a B&K calibrated mike, It was
expensive and came in a...
- Posted by Chris Cristini on Saturday 26 August 2017 - 14:28:55
...cords but I scrapped that and went with the small speaker behind its tongue. I also am giving it a dog like head hoping it won't be so creepy aka unca...
- Posted by Conundrum on Saturday 26 August 2017 - 07:41:19
...my MW coil, made using the casing from a very old plasma tube.
Going to try some adjustments such as a resonant tuned antenna set for 60kHz (aka Rug...
- Posted by Platinum on Sunday 25 June 2017 - 10:15:22
I would recommend just buying a TIG /Arc / Plasma Cutting hybrid. It might cost another £100 but you would really be risking it with high voltage a...
- Posted by Platinum on Sunday 25 June 2017 - 10:15:22
... you or anybody else here used any of the Chinese plasma cutters? Some say they last a few years some say a few seconds of cutting and they are finish...
