dizzy wrote:
Arny Krueger wrote:
However, I'd like to see the results of Trevor's evaluation of a chain of
the 5532 op amps that he has blacklisted. Here's the question - how many
stages of 5532 unity gain buffer, operating at a peak signal level of 2
volts, can we cascade before Trevor would reliably hear a differnce. I
suspect that after 100 stages, he might have a chance! For part 2, lets up
the stage gain to 10 dB, and then interpose attenuators between the stages,
so the levels throughout the chain and the output level are still 2 volts.
For parts 3 and 4, let's up the gain again to 20 dB, and finally 40 dB.
In none of the cases above will Trevor be able to hear a change due to just
one stage. Doesn't stop him from posturing dogmatically and foolishly,
though.
Doug Self thinks the 5532 is the best. He backs it up with facts and
measurements.
**I see no mention of the AD825. A significantly better OP amp than the
5532.
http://www.dself.dsl.pipex.com/ampins/webbop/opamp.htm
'Course, Trevor might discount what Self thinks, because Self also
likes tone controls. 8)
**I have no problem with tone controls which operate in the digital
domain, nor those (digital types) which can be adjusted via the use of a
reference and appropriate test equipment.
Trevor Wilson
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