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bypass a IL4558 on a phono amplifier.
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how can i bypass the IL4558?
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reduce the gain on the IL4558
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Topic: bypass a IL4558 on a phono amplifier. (Read 3781 times)
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AFSR
Newbie
Posts: 2
bypass a IL4558 on a phono amplifier.
«
on:
February 26, 2014, 04:03:29 pm »
i have an old sony stereo and has a phono input! but its to sensitive for connecting any device to it!. you barely give it any input and distorts. can i bypass the IL4558 that is just after the input jack's? how can i lower the gain of these input?
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dr_dan
Contributor
Posts: 28
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Re: bypass a IL4558 on a phono amplifier.
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Reply #1 on:
February 26, 2014, 04:29:29 pm »
A few years ago I used this circuit - it lowers the input level and compensates for the non-flat input characteristics of the phono input.
http://www.epanorama.net/circuits/phono.html
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AFSR
Newbie
Posts: 2
Re: bypass a IL4558 on a phono amplifier.
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Reply #2 on:
February 26, 2014, 04:46:38 pm »
that is great! but i will not use the phono input anymore ( have no turntable). can i just remove the il4558 and bypass the pins?
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SeanB
Super Contributor
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Re: bypass a IL4558 on a phono amplifier.
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Reply #3 on:
February 26, 2014, 07:12:13 pm »
Would recommend you just remove the feedback network and turn the 4668 into a plain buffer amplifier instead. Then add an attenuator on the input side as it will still need about 6db of attenuation to handle a standard line level input.
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