DIY ES9018 DAC + LM4780 AMP Details part 6
Posted 6th January 2015 at 12:28 PM by Maciej Czerwinski
Updated 6th January 2015 at 06:18 PM by Maciej Czerwinski
Updated 6th January 2015 at 06:18 PM by Maciej Czerwinski
HOUSING:
Typical steel box consists of four pieces bolted together. Dimensions: 440 x 100 x 255 mm (W x H x D). Notice the "Acqua di Gio" volume knob
Bottom piece. I made two holes to let air flow through power amp heatsinks. There are corresponding holes in the top piece. The black plastic pieces are heatsink mountings:
Top cover and side walls form one piece. I glued same aluminum mesh into heatsink airflow holes in order to protect the inside of the housing.
Detailed view of front piece inner side. Display protecting glass cut out of old picture frame and painted with red transparent paint. Total DIY:
MEASUREMENTS:
Output of the power amplifier loaded with 3.9Ohm resistor, connected to Left line input of the E-MU 0202 with two 10uF unipolar electrolytic caps. E-MU gain knob set to zero. All dac attenuation registers set to zero.
RMAA 24/96 THD test result is 0,0003%:
IMD+N: 0,022%. Close-up of the important part:
Frequency response:
TOTAL COST of building the whole thing, very roughly estimated, is about 150EUR
Typical steel box consists of four pieces bolted together. Dimensions: 440 x 100 x 255 mm (W x H x D). Notice the "Acqua di Gio" volume knob
Bottom piece. I made two holes to let air flow through power amp heatsinks. There are corresponding holes in the top piece. The black plastic pieces are heatsink mountings:
Top cover and side walls form one piece. I glued same aluminum mesh into heatsink airflow holes in order to protect the inside of the housing.
Detailed view of front piece inner side. Display protecting glass cut out of old picture frame and painted with red transparent paint. Total DIY:
MEASUREMENTS:
Output of the power amplifier loaded with 3.9Ohm resistor, connected to Left line input of the E-MU 0202 with two 10uF unipolar electrolytic caps. E-MU gain knob set to zero. All dac attenuation registers set to zero.
RMAA 24/96 THD test result is 0,0003%:
IMD+N: 0,022%. Close-up of the important part:
Frequency response:
TOTAL COST of building the whole thing, very roughly estimated, is about 150EUR
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