Dx Optimus is being prepared... dynamic bias.. Class A to AB - Page 5 - diyAudio
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Old 12th November 2008, 10:30 AM   #41
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Default No more Optimus.... adjusting bias, and comparing with the HRII


... i found that 1 ampere or higher standby bias does not give us any advantage into sound reproduction.... TESTED!

I found was sligthly mufled into higher bias....also i have found the optimized bias point is around 250 miliamperes (as Nordic said..he was rigth!).

Comparisons made, using two identical amplifiers, same parts and same supply, into a single speaker, gave me this result..instead to adjust your stand by bias to 60 to 100 miliamperes, it is better to increase it to 250 to 300 miliamperes because performance was better than lower bias and higher bias.

So.... Optimus is dead....now we have HRII Optimized!

Be happy folks.

Enjoy Dx Amplifier.... sounding near the perfection.

regards,

Carlos
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Old 12th November 2008, 11:02 AM   #42
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Charlie,
optimus muddles up the treble... five percent of the population is obviously deaf.
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Old 12th November 2008, 12:54 PM   #43
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Default Thank you Lumba


be happy...and positive.

regards,

Carlos
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