I don't know about the version in your picture but I built the A1 clone from Jim's Audio. Im very pleased.
The schematics of these clone are floating around and easy to find. Picture #7.The hypocrisy of these commercial clone vendors. They copy (steal) someone else's work, unless they have licensed that design, which is doubtful, but will only reveal a schematic of their copy if you PURCHASE one from them.
The schematics of these clone are floating around and easy to find. Picture #7.
A1 Headphone board Kit Refer Baia A1 amp BD-139-16+Mc33078 Standard Edition | eBay
How much it resembles the genuine Beyerdynamic A1 is everyone's guess!
Most electronic kit sellers on e-bay are resellers who know absolutely nothing about electronics. Buyer beware. You need to know what you want to buy DIY electronics on e-bay. I have had some gem and also some which go directly to the trash can.Yes, but that wasn't my point. My point was that clone vendors don't usually provide their own (COPIED) schematic unless purchasing from them. As if they had their own original I.P. to protect.
do you think this clone is better than O2 amplifier? for a pair of beyer dt880 250?
Take a look at this thread. It takes some work, but is a low cost approach with superiority result.thank you...my budget is not very big...