here is my new 3-Channel Amp !
Based on the design of the Australian Engineer Howard Lee (fred_fred_2004) ! He sent me a second circuit board ,so i present my first little DIY amp.... :-)
made for my "big" Phones like T1, Dt770 , HD600/650 , AKG K701...
This Amp has very awesome powerful sound, and it's especially designed for "hard to drive" Phones.
I changed some components... and put it into a unique enclosure...
first picture is original design with two ! LME 4562 (one for each channel)
...next picture is my "refined" version...
with 0,1% precision metal-film resistors ,
two LME 49720HA (the special metal-can version of the famous LME 4562 )
LM6171 unity gain ground channel
NO ! Op-Amp Sockets ! (Sockets add capacitance to the board and can affect frequency performance. It is better to solder the amplifier directly into the PC board without using any socket. )
Only two sockets for changing the gain resistors
Panasonic CFP Series SMD capacitors
EPCOS Ceramic & MKT capacitors
"matched" Alps RK097 pot
high-grade 3,5mm Jacks
...with added Crossfeed (Jan Meier Bass Enhanced medium Crossfeed) made with 1% Röderstein MKP & 0,1% Vishay Dale non magnetic resistors... connected with Sommercable SC-CICADIA SO-D14...
...heatsink Aluminum Case...
...next to my modified IEM-Amp GO-VIBE V6 ...
3-Channel Amp with new red Low Current LED & Power-Switch
Many thanks to Howard who enabled this project :-) :-) :-)