Review: NwAvGuy's O2 DIY Amplifier - Page 9  

Does it comes with power supply?

So I need to get a chargeable 9V battery?

Is it possible to put a RCA input?

Quote:

Originally Posted by Head Injury 

2Vrms is standard. The O2 isn't normally meant to be used with a standard DAC on battery, but can be with the right gain settings. What gain settings are you using?

For now I'm using the stock gain settings. I may change the gain resistors for a lower value gain if I have time.

I think my friend's selling them with power supplies, so if you are going portable you may need to buy batteries.

I'm not sure about the RCA input, as the enclosure doesn't have the necessary drilled holes. You would need some sort of custom back panel.

For now, I 'm using an RCA to 3.5mm adapter cable and have had no problems.
 

Quote:

Originally Posted by normalwrong 

Does it comes with power supply?

So I need to get a chargeable 9V battery?

Is it possible to put a RCA input?

Quote:

Originally Posted by deadlylover 

You don't even have to be able to read a circuit diagram to put this amp together. Match the component and designation from the BOM, and place it where the silkscreen says. There is nothing to adjust/configure, so as long as the parts aren't junk, and everything is in the right spot, the amp will work.

 

I haven't been keeping up with the project at all, but have there been people having trouble putting this thing together? I would be very surprised if that's the case, considering the overwhelming support for this project from the designer and his followers.

Thanks for the clarification - I was working off some of the comments nwavguy made earlier in the project, but clearly I was off-beam. Look forward to hearing more impressions. 

As someone who has put one together that is awaiting testing, it really isn't hard - if board polarity markings aren't enough NwAvGuy has advice on everything from the type of solder to use, the kind of soldering iron and how to drill the front panel - there's a reason the article is so long. Only real problem is the MOSFETS, which are liable to die if you touch the pins.

Since i live in the UK i have preordered an O2 from Epiphany Acoustics. They took my deposit earlier this week. Should take a few weeks for it to arrive.

Quote:

Originally Posted by Hi-fi Wigwammer 

Since i live in the UK i have preordered an O2 from Epiphany Acoustics. They took my deposit earlier this week. Should take a few weeks for it to arrive.

Thanks for that, wiggy - I'm hoping mine will be here before Xmas Day. Short of Fiio and some of the CMOYs, I dont know too many commercial amp makers who can deliver a portable amp for under 200 AUD.

can it drive lcd2?

Quote:

Originally Posted by normalwrong 

can it drive lcd2?

Yes, I've tried it myself.

No, you have to buy the parts, the enclosure and the board.

Quote:

Originally Posted by LizardKing1 

No, you have to buy the parts, the enclosure and the board.

Please confirm that there is absolutely no soldering required - that doesnt gel with my initial understanding of what was required.

There is most definitely soldering involved.

Quote:

Originally Posted by estreeter 

Please confirm that there is absolutely no soldering required - that doesnt gel with my initial understanding of what was required.

 

There is a guy on DIYAudio flogging fully populated boards if you don't feel up to it. Then all you need is a front panel, case and a screwdriver!

Epiphany Acoustics in the UK are taking preorders for their first batch of O2 amps now. £100 plus shipping, fully built with a properly finished/labelled casing.