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Old 26th September 2011, 01:51 PM   #151
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My preamp mounted an 0,47uf teflon caps and 1Mohms parallel resistor in output, is possible bypass a electrolitics caps of 22uf mounted in L20D input for a best sound?
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Old 26th September 2011, 02:26 PM   #152
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by salvinci View Post
My preamp mounted an 0,47uf teflon caps and 1Mohms parallel resistor in output, is possible bypass a electrolitics caps of 22uf mounted in L20D input for a best sound?

I'm sorry I'm not quite understand your meaning.

L20D input capacitance can't cancel, also do not have to change.

The capacitance of the quality is very good, even more than the IR company provide the IRAUDAMP7S above the capacitance

Last edited by ljm_ljm; 26th September 2011 at 02:30 PM.
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Old 26th September 2011, 03:07 PM   #153
ljm_ljm is offline ljm_ljm  China
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But 22 UF can parallel MKP 0.1 UF
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Old 27th September 2011, 11:49 AM   #154
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Originally Posted by ljm_ljm View Post
But 22 UF can parallel MKP 0.1 UF
ok, but I can change this caps with a non polarizzed caps? ( I have a 22uf petp caps)
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Old 27th September 2011, 04:45 PM   #155
ljm_ljm is offline ljm_ljm  China
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The capacitance can be replaced, or better capacitance.

Best capacity is more than 10 UF. But must not cancel the capacitance
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Old 27th September 2011, 11:54 PM   #156
Bernie7 is offline Bernie7  Singapore
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Quote:
Originally Posted by ljm_ljm View Post
The capacitance can be replaced, or better capacitance.

Best capacity is more than 10 UF. But must not cancel the capacitance
Is the input 22uf capacitor for DC blocking only, or does it do more
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Old 28th September 2011, 12:03 AM   #157
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The input capacitor forms a filter with the input resistor.
3k3 and 10uf gives a break point of around 5Hz.
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Old 28th September 2011, 01:25 AM   #158
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Bernie7 View Post
Is the input 22uf capacitor for DC blocking only, or does it do more
If no input capacitor, IRS2092 will not work.

In fact the larger of the capacitor is more small capacitance distortion.
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Old 28th September 2011, 01:51 AM   #159
Bernie7 is offline Bernie7  Singapore
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I am listening to the L20D now with the input caps shorted, and it's not only working but sounding mighty fine across the entire freq range, giving more extended and detailed top end.

The input cap forms a high pass filter with the input 3.3K and this imposes a low freq cutoff, but no cap means no cutoff, no?

What am I missing - why is the input cap mandatory if my source is AC coupled?
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Old 28th September 2011, 02:19 AM   #160
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Bernie7 View Post
I am listening to the L20D now with the input caps shorted, and it's not only working but sounding mighty fine across the entire freq range, giving more extended and detailed top end.

The input cap forms a high pass filter with the input 3.3K and this imposes a low freq cutoff, but no cap means no cutoff, no?

What am I missing - why is the input cap mandatory if my source is AC coupled?
Amazing.

If you can use if you are free to use.

But I am not very suggested that such, it gives some dangerous.
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