To get more information contact me at: firstname.lastname@example.org
This born to create a cheap and
good complete system with hi-end sonic performances superior to many commercial
medium and high price
previous cheap systems
use the the Gainclone amplifier with
LM3875 chip but here to get a more neutral sound and more
power my choice is a
nxV200 VFET-MOSFET Audio Amplifier
There are many
testimonials to support the good sound
of these modules.
To create the heat sink has been
used one side of the HI-FI2000 1PD02300B
ask as single part and split in two parts.
If you don't find a r-core you can use the good Nuvotem Talema Encapsulated Toroidal transformers from RS-Components.
In all my projects
I am using a
DACT stepper attenuator
instead of the normal Alps or Noble solution, but in this case, with a
limited budget i have used a blue Alps 10k+10k buy at
The sonic differences using the 22uF MKP bypass
are very big so I suggest to use always these.
To create the interconnect cables I have used:
Many of these parts are available in the Audiokit shop.
Follow this link to see the complete project and ask for the pcb of DAC end 2 to Quang Hao
The amplifier will follows the sound of this true hi-end DAC given a top level result.
|My choice about power supply transformers
LS70-1 0-15X2(0.8A) 0-12X1(0.8A) about 23.5$
R80-55 0-9 X2 (3A),0-250(200mA) about 45$
got on Ebay shop DIY-Gene.
To reduce the distortion, to increase the output level and to load
better the 10Kohm ALPS I have decided to use a E182CC Mullard with the
Audio modules to implement a current generator instead of
normal anodic resistors.
The amplification factor of the E182CC is 24 and with the 5687 is only 17-18.
As output capacitors I have used a
2.2uF Solen or SCR and a 1uF Obbligato Copper Case Aluminum Film.
1uF in parallel to 2.2uF = 3.2uF
This mean a lower frequency cut off on 10Kohm ALPS at:
Ft(-3dB) = 1 / (2 * 3.14 * C * R) = 1 / ( 2 * 3.14 * 3.E-6 * 10Kohm) = 5Hz
|The two good heat sinks in the I/V power supply are Farnell cod. 1710611 5,6°C/W for the filaments and cod. 1710612 4,4°C/W for the anodic.|
|The two main chips, CS8414 and
AD1865, are available in many Ebay shop but keep attention to the fakes.
Solder the CS8414 on a SOIC (SMD) to DIP adapter could be not very easy so buy a kit.
Any 2 or 3 way loudspeakers in the range of 2000-3000$
CD PLAYER or CD TRANSPORT
I have some found problems with the CDROM used like cd transport because with some CDs there are blocks of the controller or high noise coming from transport.
The unique CD player for Hi-end DIY is the CDPRO2M from:www.diy-high-end.com
An valid alternative could be any low cost CD Player or better a cheaper DVD/DIVX Player with a spdif coax output.
USB TO SPDIF
This USB to Spdif converter has been created using the Kit/2 only 49$ got from http://www.hagtech.com/hagusb.html and a 5v rele' to add an automatic switch of digital sources.