hey guys, i was looking into the datasheet of lm4780 and lm3886
and i found that the THD in LM4780 is 0.5% and 0.1% into LM3886.
i think that these numbers ar not good enought for an HIFI amp, right?
and another question.. if i use 2 ICs to create an bridged amp, ill get more THD? or will be the same as if i use only 1?
hope ppl understad me
and i found that the THD in LM4780 is 0.5% and 0.1% into LM3886.
i think that these numbers ar not good enought for an HIFI amp, right?
and another question.. if i use 2 ICs to create an bridged amp, ill get more THD? or will be the same as if i use only 1?
hope ppl understad me
some amps with .01% can sound really bad
other amps with 2.0% can sound really good
chip amps if done well can sound pretty good
If you bridge you will have twice the voltage available, so it's good for low voltage supplies and /or Higher impedance loads.
If you speaker are 4 - 6ohms bridging will not be ideal. each chip will see 2 - 3 ohms and chips mostly have limited current levels
Why not start with a single chip and see if you like the sound before you try bridging - the sound charactor does not change that much with bridging
hope this helps
other amps with 2.0% can sound really good
chip amps if done well can sound pretty good
If you bridge you will have twice the voltage available, so it's good for low voltage supplies and /or Higher impedance loads.
If you speaker are 4 - 6ohms bridging will not be ideal. each chip will see 2 - 3 ohms and chips mostly have limited current levels
Why not start with a single chip and see if you like the sound before you try bridging - the sound charactor does not change that much with bridging
hope this helps
samsagaz said:
Ultimately it depends on what sound you prefer and how much time and money you have spare.
with a chip most the difficult design work, layout and construction is done for you. The chip itself brings some advantages. There are a great place to start and extrememly good value
john linsley hood simple class A is a great class A discrete design see
http://www.diyaudio.com/forums/showthread.php?s=&threadid=3075&perpage=10&pagenumber=1
and
http://www.tcaas.btinternet.co.uk/index-1.htm
for a great AB design look here
http://www.printedelectronics.com/products/products_aksa55.html
that should keep you busy reading for a while...
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