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Old 18th April 2005, 12:56 AM   #1
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Default Which Chip Better

Dear All,

Any one has experience to tell, LM3868 and LM3875
is better in "HI FI" point of view (with same output)
in case :

Making :
1) Classic GainClone ?
2) PBA 200

Thanks

Thomas
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Old 18th April 2005, 02:43 AM   #2
Leolabs is offline Leolabs  Malaysia
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Should be LM3886 not LM3868,right???

I havent actually hear the sounds of the both under same circumstances,which mean i havent make any AB comparison between them.But there's 1 thing for sure,driving capability of LM3886 is better than LM3875.U cant tell LM3875 to drive a nominal 4 ohms load when operating at high supply voltage.

So,for me,i will use LM3875 for classic Gainclone but operate it around plus minus 18V,and for BPA200,LM3886 of course!
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Old 18th April 2005, 06:46 AM   #3
nina is offline nina  United Kingdom
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It depends your speaker (sensivity), type of music you listen to and size of the room.

I had listened my friend's PBA200 for some times last years, I preferred LM3875 Classic GC (25W) as more detail, clearer, better transient responses -- particularly if you have high-sensivity speakers.
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Old 18th April 2005, 06:46 AM   #4
nina is offline nina  United Kingdom
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Default Re: Which Chip Better

Quote:
Originally posted by thomasfw
Dear All,

Any one has experience to tell, LM3868 and LM3875
is better in "HI FI" point of view (with same output)
in case :

Making :
1) Classic GainClone ?
2) PBA 200

Thanks

Thomas
How come I forgot to answer to your question -__-"

In my opinion, in case of:

Classic GainClone ---> LM3875
PBA200 --> LM 3886
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Old 18th April 2005, 08:16 AM   #5
Nuuk is offline Nuuk  United Kingdom
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I agree, if you don't need the extra power, ie you have easy to drive speakers, the LM3875 does just edge it as regards sound.

There's a touch more 'delicacy' with the LM3875.
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Old 18th April 2005, 08:55 AM   #6
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The 3785 is better inverted, the 3886 non. But the OPA549 inverted is better than both...
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Old 18th April 2005, 09:03 AM   #7
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...and with the right rail voltage supply... usual living-room size... and the kind of music you play... that high-sensitivity requirement "trade-mark" for LM3875 do not always necessarily right...

My LM3875 NIGC with +/-18V AC secondary (about +/-25VDC rail) with 2x1500uF per-channel, drive 86db/4ohm Dyanudio Audience 40 with pride... (I listen to jazz, classical, acoustic, rocks... but not synthesized-house music...)

Regards,
---
David
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