Hi, I'm building a Personal Sound amp to hopefully relieve some of the issues regarding TV volume levels. I had a commercial unit before and it really helped the TV volume level stress issues!!
What I have on the drawing board is an electret mic feeding a transistor preamp, feeding another amp driving cheap headphones.
My questions:
In looking for circuit ideas for the amplifier following the mic preamp, would this amp be called a "voltage amp", an "audio amp", or "line amp". Keeping in mind the output is used to drive only the headphones (cheap ones at that) what type (name) of amp circuitry should I be looking for??
In the commercial rig I owned years ago, the mic was very near the TV with a long mic lead going to the amp near my "lazy boy" Is this ideal? Would it be better to have the mic and amp near the TV with a long lead for the headphones?
Thank you very much for your help!!
What I have on the drawing board is an electret mic feeding a transistor preamp, feeding another amp driving cheap headphones.
My questions:
In looking for circuit ideas for the amplifier following the mic preamp, would this amp be called a "voltage amp", an "audio amp", or "line amp". Keeping in mind the output is used to drive only the headphones (cheap ones at that) what type (name) of amp circuitry should I be looking for??
In the commercial rig I owned years ago, the mic was very near the TV with a long mic lead going to the amp near my "lazy boy" Is this ideal? Would it be better to have the mic and amp near the TV with a long lead for the headphones?
Thank you very much for your help!!
headphone(s) amplifier or preamplifier
If having a cable from the TV to the listening position is possible, why not eliminate the microphone & mic preamp and get the audio signal from any of the available (in order) TV audio outputs (if available):
1) TV optic audio output (using an optic to analog converter, for example, www.ebay.com/itm/113085042791, already with headphone output !)
2) TV audio/headphone output (I mentioned this because my TV has a headphone output)
or (if the TV has no audio output, then create one)
3) take audio signal from the TV speakers (this implies opening the TV and soldering audio output wires on the TV speaker wires). You might be able to connect the headphones through some 50 - 500 ohm double potentiometer without any additional (transistor preamp, preamp, power supply,...) circuitry.
If you want to get rid of the headphone amplifier and/or the cable between TV and listening position, you could use a Bluetooth Transmitter (emitter) near the TV (input audio like options 1) to 3) above) paired with some Bluetooth headphones.
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