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Old 8th November 2003, 12:54 PM   #1
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Default LM386 as headphone amp? Will it work?

Can the LM386 be used as a headphone amplifier? Would I have to set the gain below 20 to do that, and is that even possible? Or would I have to use a resistor on the input or something? I don't need a volume conrol, since the audio out of the CD player is controlled.
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Old 8th November 2003, 04:55 PM   #2
audioPT is offline audioPT  Portugal
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Yes, it will work.

But don't expect good sounding
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Old 8th November 2003, 06:21 PM   #3
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No, the LM386 can't be set to a gain below 20. This is way too much for a headphone amp. There are definately better options.

Because of the relatively low power and gain involved in a headphone amp, you are probably better off using a standard op-amp.
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Old 8th November 2003, 07:39 PM   #4
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Quote:
This is way too much for a headphone amp.
not for the k-1000...................................
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Old 9th November 2003, 12:26 AM   #5
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Quote:
Originally posted by tbla
not for the k-1000...................................
I DEFINATELY wouldn't use a LM386 for the AKG K1000, although after you buy those headphones, you might only be able to afford to use a LM386.
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Old 9th November 2003, 01:31 AM   #6
Vigier is offline Vigier  Netherlands
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I suggest you use a OPA627 or OPA637 with a BUF634 after it. The OPA will give the necessary voltage swing, and the BUF634 gives enought current (250mA).
Instead of the (in comparison to the LM386) rather expensive OPA627/637 you could also use the NE5534, which is cheaper and sure good enough if you planned to use the LM386 at first.

Grtz, Joris
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Old 9th November 2003, 02:41 AM   #7
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Quote:
Originally posted by Vigier
I suggest you use a OPA627 or OPA637 with a BUF634 after it. The OPA will give the necessary voltage swing, and the BUF634 gives enought current (250mA).
Instead of the (in comparison to the LM386) rather expensive OPA627/637 you could also use the NE5534, which is cheaper and sure good enough if you planned to use the LM386 at first.

Grtz, Joris
Something like this maybe?
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Old 9th November 2003, 10:04 AM   #8
Vigier is offline Vigier  Netherlands
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Yessssssssssssss.....

Grtz, Joris
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Old 10th November 2003, 12:52 PM   #9
moamps is offline moamps  Croatia
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Hi all,

just for info,
older professional cass Tascam 122mkII uses LM386.
Newer professional products from Tascam (MD801, DA30,..) use LA6510 power opamp in headphones amp.
http://62.236.156.23/ideaport/d/la6510.pdf

Regards
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