Hi, I'm looking towards my second diy amp project. As usual, cmoy was the first, but now I'm looking for something with a little more punch. I've been looking at the 50-100$ diy range that has the ability to recharge/run on wall plug with two batteries. This has left me with the options of tangent's Pimeta v2 and nwavguy's Objective2. I haven't been able to find information on the notable differences of both and also comparing the two.
My main needs are swappable opamps and option to recharge/use on batteries or wall plug. I don't need them to be portable. The two amps cover these. Could someone help me decide? Thank you.
My main needs are swappable opamps and option to recharge/use on batteries or wall plug. I don't need them to be portable. The two amps cover these. Could someone help me decide? Thank you.
Go for O2, because
- Of the shelf, readily available, thru hole parts(no SMD or boutique parts used)
- Simple yet good objective design.
- Near zero ohm o/p impedance (0.5 Ohms)
- Drives 16-600 Ohms h/p with o/p 7V rms /200mA max with adj. gain
- Employs real gnd (No shaky virtual gnd or 3-ch. gnd "concept")
- Flat audio response - no coloration.
I can go on & on...
I won't list any flaws of pimeta as I don't want to start any "War Of Words"
You can get kits/finished O2 from many good reliable sources like jtktam(audio poutine), swalter(Head n Hifi) or epiphany acoustics right here at diyaudio (also lots of help from fellow diyaudio members, especially moders like agdr).
- Of the shelf, readily available, thru hole parts(no SMD or boutique parts used)
- Simple yet good objective design.
- Near zero ohm o/p impedance (0.5 Ohms)
- Drives 16-600 Ohms h/p with o/p 7V rms /200mA max with adj. gain
- Employs real gnd (No shaky virtual gnd or 3-ch. gnd "concept")
- Flat audio response - no coloration.
I can go on & on...
I won't list any flaws of pimeta as I don't want to start any "War Of Words"
You can get kits/finished O2 from many good reliable sources like jtktam(audio poutine), swalter(Head n Hifi) or epiphany acoustics right here at diyaudio (also lots of help from fellow diyaudio members, especially moders like agdr).
Last edited:
Did you ever heard one or are you just recommending something based on something you read somewhere?
Could you state the reasons for what you wrote?
No, never heard a PPA/Pimeta, and I have never commented on how it sounds.
The design is flawed, that's all. You do not need me to explain how, it has been done in depth by others, much more qualified than me.
the distinction between AMB, head-fi's faddish "3 channel" and a active split supply is very small on the pcb
its usually easy to cut and jump (or lift a pin or 2) to have a single copper path from input singal gnd to output gnd
if the project already has a dual polarity supply you can just not stuff the 3rd "gnd channel" - again add a jumper or 2
its usually easy to cut and jump (or lift a pin or 2) to have a single copper path from input singal gnd to output gnd
if the project already has a dual polarity supply you can just not stuff the 3rd "gnd channel" - again add a jumper or 2
NwAvGuy: Virtual Grounds & 3 Channel Amps
I highly recommend reading the whole blog (incl. comments)
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.