Electronics > Beginners
Just how bad is it? Audio mixer with headphone amp.
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BrianHG:

--- Quote from: Bassman59 on February 28, 2018, 05:56:28 pm --- and enough drive to clean the wax outta your ears.

--- End quote ---
  :-DD
paulca:
Apparently you can buy cheap digital 8 channel desks for £600, but most of the stuff I have seen is pubs, clubs, bands and bedroom musicians are using things like Mackie's and Soundcraft spirits.  So maybe they are getting cheap enough for smaller venues, but the only digital mixing I have seen has been using PC/Mac sound card style solutions with USB remotes.  Those are just the electronic musicians though.

Anywhere big enough to have an installed sound system and proper desk/console is a lot larger than the places I have been into. 

Besides I think my info is a few years out of date.  I forget how quickly time passes the older you get :(  What seemed like a few years ago turns out to be 5 or 10.
BrianHG:
By the way, Bassman59's suggestion of using an OPA551 op-amp is an excellent idea.  Buy a few in the DIP package so you may swap them if you burn one by accident...  Use gold machine screw alloy IC sockets for this one in your design...

Damn, I now have an app for the little 1/2 watt buggers....

Now, it's time to get serious, try the TCA0372BDP1G at 0.48$ each, that's 1/5th the price of the OP551.   1 Amp out.  Driving an 8 ohm speaker at +/-8v, you will get 8 watts out of this opamp.  And it's a dual, so 1 8 pin device for stereo...

Wow, an 8 watt bugger for 48 cents, stereo.  With headphones, this guy will remove your eardrum from your ears!
You can drive small bookshelf speakers with your pre-amp directly through the headphone output.
paulca:
Light weights.  I had a TRIO amplifier.  I'm fairly sure they just connected the speaker outs to the headphone jack :D

I should have had little headphone stickers on that amp with an X through them.  It would have been an Ace in WWII.
Bassman59:

--- Quote from: BrianHG on February 28, 2018, 07:46:34 pm ---Now, it's time to get serious, try the TCA0372BDP1G at 0.48$ each, that's 1/5th the price of the OP551.   1 Amp out.  Driving an 8 ohm speaker at +/-8v, you will get 8 watts out of this opamp.  And it's a dual, so 1 8 pin device for stereo...

Wow, an 8 watt bugger for 48 cents, stereo.  With headphones, this guy will remove your eardrum from your ears!
You can drive small bookshelf speakers with your pre-amp directly through the headphone output.

--- End quote ---

Wow, I had no idea that guy even existed. The data sheet advertises “No deadband crossover distortion provides better performance for driving coils,” and of course headphones are coils. Sounds (pun intended) good to me. Gonna order a few and test.
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