You can do it as @steveu suggests 🙂
I normally set the output to just below clipping and holding CTRL I left click the output trace expression to see the RMS voltage and just quickly calculate it manually.
So 7.5 volts rms and an 8 ohm load is 7 watts.
You can also calculate the theoretical max output you are aiming for using the supply rails while accounting for some voltage loss due to losses across output and driver transistors. For example and amplifier running on -/+38 volt rails might reasonably be expected to deliver lets say -/+32 volts into an 8 ohm load and that is around 64 watts rms into an 8 ohm load.
I managed to get a result with complementary devices - this was just curiosity and to get LTspice onto my laptop and see if I could make it do anything 🙂
I don't know if it would sound any good and it needs a bit more voltage swing, but I like the local feedback - get the drivers in line with the local(ish) feedback then a couple of followers push and pull the speaker 🙂
Probably a better VAS stage and darlington followers might do, but at least it does something !
I see the drawback of the quasi approach, the top transistor seems to be a follower but the bottom one is current amplifier, so there's something slightly unholy about it LOL.
Thanks to the OP for the thread start, apologies for polluting it a bit, It's years since I had SPICE on the laptop so this is useful - cheers all!
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Basestoppers should be 2.2R , not 100R. Don't need C6 , would eat all the bandwidth up. Miller cap C7 is plenty enough.
OS
Easyamp ?? Actually - 32ppm with 35V rails/20Khz full power. An easy "Badger".
Same as most above amps , but really performs. Has proper decoupling , proven Vbe (thermal).
Use BCxxx / 2Nxxxx / anything will work @35V. Runs at 50V with proper devices.
OS
Same as most above amps , but really performs. Has proper decoupling , proven Vbe (thermal).
Use BCxxx / 2Nxxxx / anything will work @35V. Runs at 50V with proper devices.
OS
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Good schematic sir. I like this type of simple design. Thanks for sharing your design with us.
FET amps can have very low distortion if designed properly.
It looks basically OK 🙂 The response is a bit unpredictable at the top end though.
Response:
Try this:
Response:
Try this:
You set the Analysis settings to this. Right click the workspace or click AC on the toolbar or type A to bring this up:
D
Deleted member 550749
This is bimo sir design cfa design Hec45 little bit complex circuit but looks very good to me , and yes Garber also available for this project or build , 👍 Ahmad https://www.diyaudio.com/community/threads/simple-hec-amplifier-24vdc.388896/