collapse

Author Topic: Vox hybrid project  (Read 621 times)

johngovan1234

  • Chipper
  • *
  • Posts: 2
  • Chip Points: 0
    • View Profile
Vox hybrid project
« on: November 24, 2018, 09:10:42 AM »
I made a vox top boost preamp. And i'd like to hook it into a class d TPA3116 power amp. Should i put preamp or buffer or DI circuit to the tpa3116 amp? Or hook the vox preamp straight into the tpa3116 input? Hope someone might help me. Thank you.

edvard

  • SSGuitar Regular
  • ***
  • Posts: 24
  • Chip Points: 0
    • View Profile
Re: Vox hybrid project
« Reply #1 on: November 24, 2018, 11:33:10 PM »
You should be able to simply hook it right in.  Make sure you have a large-ish decoupling capacitor at the power amp input.  I see from the datasheet they recommend 1uf caps at both INPR/L and INNR/L pins.  That should be a good start. 

johngovan1234

  • Chipper
  • *
  • Posts: 2
  • Chip Points: 0
    • View Profile
Re: Vox hybrid project
« Reply #2 on: November 25, 2018, 03:10:53 AM »
Thank you so much. I'll try your recommendations. I hope it will work well. :)

edvard

  • SSGuitar Regular
  • ***
  • Posts: 24
  • Chip Points: 0
    • View Profile
Re: Vox hybrid project
« Reply #3 on: November 25, 2018, 04:38:25 AM »
Be sure to read the datasheet docs very carefully.  Class D amplifiers can be somewhat different beasts from 'normal' ones, and I don't have any personal experience with them; I just noted what is on the datasheet.  I also noticed that the input pins are supposed to be differential.  Does that mean the INN pins can be grounded and the INP pins carry signal?  I don't know, and it would probably be worth it to find out.  Read the docs and do a little searching around.  It may turn out that you'll need a phase split circuit between the preamp and power amp.

 

* User Controls

 
 
Welcome, Guest. Please login or register.
Did you miss your activation email?

* Recent Posts

Vox Pathfinder 10 mods by blackcorvo
[Today at 02:20:12 AM]


Honeytone Tube conversion using subminiature tubes by blackcorvo
[Today at 01:44:00 AM]


Noisy EFF board from a Roland JC-120G by joecool85
[April 16, 2019, 01:58:30 PM]


Univox Stage 65b by Sfmag1
[April 12, 2019, 05:45:51 AM]


Crate gx900h by Amdthedestroyer
[April 04, 2019, 05:38:16 PM]

* Sponsors