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Old 26th January 2010, 02:45 PM   #6791
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Yes i see.I think i should build a preamp.which pre can sound best with F5?Is there a preamp choice that makes good synergy? Maybe a little of F5 ?
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Old 26th January 2010, 04:00 PM   #6792
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People often recommend a Pass B1 buffer as a preamp for the F5.
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Old 26th January 2010, 04:13 PM   #6793
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I joined to group buy for B1.but F5 needs gain.So i do not know what to do. Maybe get 4xgain with Opa627 and after that connect B1 and after that F5
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Old 26th January 2010, 04:16 PM   #6794
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Try replacing 4x 100 ohms with 4x 150 - 200R
That gives you more gain.
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Old 26th January 2010, 04:16 PM   #6795
cviller is offline cviller  Denmark
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umut1001 read your own signature.... are you sure you want an opamp preamp?

Quote:
Best opamp is no opamp.If really needed build a discrete opamp.
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Old 26th January 2010, 04:23 PM   #6796
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by umut1001 View Post
F5 needs gain.
the F5 has gain.
It's maximum output is ~22Vpk.
It's maximum input is ~3.8Vpk. This is equivalent to 2.7Vac.
The F5 does not need more gain.
Low output sources may need more gain, using a low gain amplifier rather than a unity gain buffer.

But what is the point. You are using a damaged sound card and complaining it does not give enough volume and that is starts to distort after a short while.

Maybe the F5 and your source are compatible if you get the damaged sound card replaced or repaired.
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Old 26th January 2010, 04:25 PM   #6797
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Quote:
Originally Posted by cviller View Post
umut1001 read your own signature.... are you sure you want an opamp preamp?
opa627 is not an opamp.It is another musical thing hehe
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Old 26th January 2010, 04:27 PM   #6798
cviller is offline cviller  Denmark
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Quote:
Originally Posted by AndrewT View Post
Maybe the F5 and your source are compatible if you get the damaged sound card replaced or repaired.

No, it cant be that simple!?!?!
There is something very wrong. I suspect some resistors are turned wrong forcing the electrons to move in the wrong direction and thus cause distortion.
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Old 26th January 2010, 04:29 PM   #6799
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lol
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Old 26th January 2010, 04:32 PM   #6800
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Quote:
Originally Posted by AndrewT View Post
the F5 has gain.
It's maximum output is ~22Vpk.
It's maximum input is ~3.8Vpk. This is equivalent to 2.7Vac.
The F5 does not need more gain.
Low output sources may need more gain, using a low gain amplifier rather than a unity gain buffer.

But what is the point. You are using a damaged sound card and complaining it does not give enough volume and that is starts to distort after a short while.

Maybe the F5 and your source are compatible if you get the damaged sound card replaced or repaired.
I bridged the sound cards low quality 47uf caps.emu1212m users said these caps are not very necessary.And sound really very improved.But after 2-3 hours it gets distorted.When i restart the computer it is ok then.I did not understand
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