with +/-15v supply assuming a +/- 12V swing u will only deliver about 240mW in 300 ohms phones. And that would be the clip limit. In terms of power that may not be enough but as i said and as jcx said it depends on listening level and thus sensitivity of the phones.

Quote: Originally Posted by j4cbo A +/- 15 volt supply is more than enough, even for high-impedance headphones. Not necesarily. It really depends on ur average listening level.

well i omitted the offset nulling part... basicaly u have to calculate the current that will flow in idle state through the output transistors. When calculating the gain its good to know with how much "level" u will attack the amp so u will not overdrive it.

I didnt put the resistor value for they were calculated to suite my requirments and not urs. But i see u dont know all the electronic symbols?..... If so u must first find out more about that and some basic principles in electronics.....

usually in tone control circuits linear pots are used

okz it seems HD595 has an impedance of 120 ohms. So for 0.3W u need about 6V rms thus 8.46 peak. The current requirment tho will be higher. About 50mA. About LM1036, personally i wouldnt use it. it has big THD figures and operates on low single supply voltages. The only advantage is that u...

hmm 20mV is a small value and im pretty sure it will be triggered by audio even with filtering because of that. I was thinking to put a ac coupled buffer at the ouput and a dc coupled buffer as well and compare the outputs of these buffers. So no need for references. ofc we'll need a low offset...

Ok so u want to build a power amplifier. I think in order to understand some things we should start from the end and work the way to the begining. So the last element in ur chain are the headphones. In this device u will deliver power. Now the amp doesnt care if its headphone or speaker or...

if u plan on using LME4986 get +/- 25V supply. Regulate it at +/-22V. The bigger the supply voltage the better are the dynamics. If u drive hphones with impedance smaller than 600 put a class A single ended buffer after opamp or better make it a part of the feedback network.

I agree with XGJFilmsX you need tools and their number and price depends on the quality and complexity of ur desired work. For begining what XGJFilmsX suggest could be enough but i would add a router too. Its good to develop a steady hand with these tools. Good luck.

Chris Rea - Little Blonde Plaits

I hate those i see in Pepsi commercials

U may have some ground loop. Try to separate the 2.1 system signal ground and the mains ground.

Quote: Originally Posted by Towert7 No, it's not Valve or Solid State. ^_^ My new Design for headphone stands. This design was inspired by old Japanese Architecture. I have tried many different variations on this shape, but I like this the best. This has been painted...

I play the bass guitar. And a dual 18 incher monitor is in my to do list. Im trying to play some woodwind instruments also.