- high audio quality
...
- digital volume control (encoder + picmicro maybe IR or BT remote)
The issue is not the signal chain. The issue is reasonably powering it (like, not 230V input, and no noisy DC-DC converters), and having a high quality source (AKA: USB DAC)
hi all..
the source will be only RCA analog input with line levels, so I prefer to not convert the signal into digital, process it and then reconvert into analog.
potentially te audio source will be a turntable with a proper preamplifier.
i'm going to look at the component you suggested.. thanks!!!
Hi,
I'm thinking about my next project and I would build an audiophile headphone amplifier.
http://www.njr.com/MUSES/series/MUSES72320.html
LM1972 is a bit less esoteric.
If power supply current is not a factor, and you want an excellent digital volume, class A headphone amp with a bit of kick, I would use the MUSES, powered at full 30v (+/-15v), have the output drive 2 x 30v ultra logic level (1.2-1.8v) mosfet gate directly operating in voltage follower mode
If power supply current is not a factor, and you want an excellent digital volume, class A headphone amp with a bit of kick, I would use the MUSES, powered at full 30v (+/-15v), have the output drive 2 x 30v ultra logic level (1.2-1.8v) mosfet gate directly operating in voltage follower mode
All that engineering spend on linearity, thrown away. Not that it matters.
The issue is not the signal chain. The issue is reasonably powering it (like, not 230V input, and no noisy DC-DC converters), and having a high quality source (AKA: USB DAC)
That's why I asked what the source is.
If it's USB then you can get a complete headphone DAC for under $10 on eBay.
eg. http://www.ebay.com/itm/281827865856 (randomly chosen seller)
Chipset is this: http://www.ti.com/lit/ds/symlink/pcm2704.pdf
If you want 'audiophile' capacitors it's a couple of bucks extra.
And if you don't trust the 2704's built-in amplifier you can have external op-amp.
Or look at the c-moy op-amp based designs.
None of these things qualify as audiophile. It is 192KHz 24 bit.
- high audio quality
...
- digital volume control (encoder + picmicro maybe IR or BT remote)
IMHO, these two requirements are mutually exclusive .
- high audio quality
...
- digital volume control (encoder + picmicro maybe IR or BT remote)
IMHO, these two requirements are mutually exclusive .You can get a motorized potentiometer, control the motor with the PIC.
If this is a 'project' for listening to vinyl then I'd build something with valves as a bit more of a challenge.
Where's the fun in using one of the hundreds of single-chip-solutions?
- high audio quality
...
- digital volume control (encoder + picmicro maybe IR or BT remote)
IMHO, these two requirements are mutually exclusive .You can get a motorized potentiometer, control the motor with the PIC.
If this is a 'project' for listening to vinyl then I'd build something with valves as a bit more of a challenge.
Where's the fun in using one of the hundreds of single-chip-solutions?See the links I placed in post #15...