TPA3118 60W Power Amp Module
- Thread starter falzhobel
- Start date
Paul.Ruby
Active member
It has power-on delay but cannot detect power loss. It has a footswitch to enable/disable, so you are still expected to disable prior to power loss.
The preamplifier has 2 jobs: one is to bring instrument level up to line level for the power amp. Second is a bit of EQ to add some sparkle, just like real guitar preamps with a "bright cap" on the volume or gain pot. See R7, C6, C7 in that schematic. Those can all be tweaked to taste.
Other preamps can be used, of course, as long as they bring the signal up to line level, not instrument level.
Paul.Ruby
Active member
And, yes 12V will work but will only reach about 1/4 of the rated power (assuming you want to use the same 12V for the power amp).
Lesnik
New member
Thanks for the answer. I'm going to use these two preamps. They are powered by 9 volts, but I tried 12 volts and did not hear any changes, so I decided to power everything from 12 volts in order not to complicate the circuit and save space on the printed circuit board.
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Elijah-Baley
Active member
At 12v you should get more clear and less gainy sound, more "headroom". But with just 3v maybe you can't hear difference.
I seen before the Modern Rock Machine schematic, it looks very interesting. I never tried it, and I never found any demo, but I'm curious to hear it. Could you let us listen something about it, please?
I seen before the Modern Rock Machine schematic, it looks very interesting. I never tried it, and I never found any demo, but I'm curious to hear it. Could you let us listen something about it, please?
Lesnik
New member
Hello, here are samples of MRM and other schemes of the author.
guitar-gear.ru
Archaic Rock Machine
Вот лазишь, лазишь по забугорным сайтам, ищешь бутиковые схемы, а тут если посмотреть свои форумы отличные примочки есть! В общем первый раз схе...
Elijah-Baley
Active member
Thank you.
That, and other high gain circuit in that thread, seems sound a bit rude, as if it needs a cabinet simulator.
Do you find your build sounds like in the demo?
That, and other high gain circuit in that thread, seems sound a bit rude, as if it needs a cabinet simulator.
Do you find your build sounds like in the demo?
