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Old 18th November 2007, 08:37 AM   #1
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Default I'm looking for a LM3875 headphone circuit

I wolud like to create a headphone amplifier with LM3875. (32 ohm as output or more)
Can you please give me a diagram?? Or waht i have to change from the gainclone standard circuit??
TKS
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Old 18th November 2007, 10:48 AM   #2
Paswa is offline Paswa  India
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Hey, LM3875 for headphone? it is a 56WATT AUDIO AMPLIFIER. It'll certainly destroy to headphone and your ear. Don't make it. Look for headphone amp ICs like http://www.st.com/stonline/stappl/pr...n=&applilevel=
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Old 19th November 2007, 12:33 PM   #3
h3ad is offline h3ad  Australia
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i agree LM3875 is 2 LM3886's in the 1 package
unless u are extreemly deaf it is not advisable or u could give yourself seriouse hearing damage... even 1W into headphones is extreemly loud, let alone ~60w x 2
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Old 19th November 2007, 02:59 PM   #4
Paswa is offline Paswa  India
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oh, serenella, became mad? don't make it, it'll cause serious injury to your hearing organs
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Old 19th November 2007, 05:37 PM   #5
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Quote:
Originally posted by h3ad
i agree LM3875 is 2 LM3886's in the 1 package


No, it's not.

Quote:
unless u are extreemly deaf it is not advisable or u could give yourself seriouse hearing damage... even 1W into headphones is extreemly loud, let alone ~60w x 2
Depends on the headphones really I think.

Take a 600R set of headphones that need 1W for, say, 100dB. 1W in to a 600R load needs to swing... 24V ish, and so I would think an LM3875 would work quite well for that.

1W in to a 32R set of headphones, with 1W giving 120dB, however, would only need to swing around 5v (but would 'consume' more current), and I imagine you would be looking at somewhere between 1/4 to a 1/3 on the volume control for some extreme loudness, depending on the source and gain etc.

It won't just dump 60W of power in to the headphones regardless.
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Old 19th November 2007, 06:00 PM   #6
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Yes, most of the above suggestions are simply misleading.

LM3875 will work very well as headphone amp without any modifications needed: LM3875 as a headphone amp (another try)
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