LM1875 vs LM3886

Rullknufs · 2nd March 2011, 02:39 PM

What's the difference between these two?

As far as i have seen the LM1875 is cheaper and a little weaker. But what else?

I'm thinking of a LM1875 as a first project and for powering my CSS EL70

abraxalito · 2nd March 2011, 02:51 PM

LM1875 is more similar to TDA2030A but higher rails and more expensive. The LM3886 has much higher power dissipation and also has mute capability.

kuldeepsingh · 2nd March 2011, 02:53 PM

its the difference in Wattage, Power output.

Rullknufs · 2nd March 2011, 02:57 PM

Did i say i was new at this area?
Well, i know nothing about chip-amps at all. So please take it basic

Which one sounds best?

linuxguru · 2nd March 2011, 06:01 PM

Quote:

Originally Posted by Rullknufs

Which one sounds best?

There are a fair number of DIYers who would claim that the LM1875 sounds better than the LM3886 in a basic gainclone circuit. It's subjective, but many people report that the LM3886 is a bit bright and harsh in the upper-mids. It can be tamed, but requires careful component selection, layout and/or circuit topology changes.

suntechnik · 2nd March 2011, 07:05 PM

Both ICs need an opamp in advance. In case none inverting DC decoupled schematic very dependable on a quality of decoupling capacitors. Also both ICs sounds much better with better power supply capacitors (Nichicon, ELNA).

LM1875 is a good replacement in chines multimedia like Microlab. For the project from scratch I would use LM3886 that provides better bass as well.

Somewhere on the forum I read that LM3886 is mimicking Naim amplifier schematics that was always considered (Naim) as a pretty descent piece of equipment in audiophile world.

Some diyers like OPA549 better then LM.

Rullknufs · 2nd March 2011, 07:12 PM

Okay.

The LM1875 is so cheap so i might try to build one further on. Would a 160VA 2 x 18V / 2 x 4.44A be enough?

AndrewT · 3rd March 2011, 09:51 AM

Quote:

Originally Posted by suntechnik

Both ICs need an opamp in advance.

No !
both chipamps can and do work very well without an opamp in front.
Do not add extra components that are not required.

Rullknufs · 3rd March 2011, 06:01 PM

By the way. I heard some guy talking about not using capacitors since it "slowed down" the mids and higs and that it was better to simply use a larger transformer.

What do you experts have to say about that?

jaycee · 3rd March 2011, 06:13 PM

I say it's rubbish. A correctly made capacitor based power supply is what pretty much every hifi amp uses. The important thing is that the capacitors should be high quality and bypassed with good quality small value capacitors (100nF-470nF). I used 2x4700uF per supply rail for my LM3886 amp

2nd March 2011, 02:39 PM	#1
Rullknufs diyAudio Member Join Date: Mar 2010 Location: Sweden	LM1875 vs LM3886 What's the difference between these two? As far as i have seen the LM1875 is cheaper and a little weaker. But what else? I'm thinking of a LM1875 as a first project and for powering my CSS EL70

2nd March 2011, 02:51 PM	#2
abraxalito diyAudio Member Join Date: Sep 2007 Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though... Blog Entries: 46	LM1875 is more similar to TDA2030A but higher rails and more expensive. The LM3886 has much higher power dissipation and also has mute capability. __________________ I think ideas are what you want to get rid of. I don't really like songs with ideas. - Leonard Cohen

2nd March 2011, 02:53 PM	#3
kuldeepsingh diyAudio Member Join Date: Aug 2006 Location: Chennai, India	its the difference in Wattage, Power output. __________________ . . .. ... ..... ........ ............. ..................... .................................. My Best LM3886 PCB layout

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2nd March 2011, 02:57 PM	#4
Rullknufs diyAudio Member Join Date: Mar 2010 Location: Sweden	Did i say i was new at this area? Well, i know nothing about chip-amps at all. So please take it basic Which one sounds best?

2nd March 2011, 07:05 PM	#6
suntechnik diyAudio Member Join Date: Jun 2010 Location: St. Petersburg	Both ICs need an opamp in advance. In case none inverting DC decoupled schematic very dependable on a quality of decoupling capacitors. Also both ICs sounds much better with better power supply capacitors (Nichicon, ELNA). LM1875 is a good replacement in chines multimedia like Microlab. For the project from scratch I would use LM3886 that provides better bass as well. Somewhere on the forum I read that LM3886 is mimicking Naim amplifier schematics that was always considered (Naim) as a pretty descent piece of equipment in audiophile world. Some diyers like OPA549 better then LM.

2nd March 2011, 07:12 PM	#7
Rullknufs diyAudio Member Join Date: Mar 2010 Location: Sweden	Okay. The LM1875 is so cheap so i might try to build one further on. Would a 160VA 2 x 18V / 2 x 4.44A be enough?

3rd March 2011, 06:01 PM	#9
Rullknufs diyAudio Member Join Date: Mar 2010 Location: Sweden	By the way. I heard some guy talking about not using capacitors since it "slowed down" the mids and higs and that it was better to simply use a larger transformer. What do you experts have to say about that?

3rd March 2011, 06:13 PM	#10
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	I say it's rubbish. A correctly made capacitor based power supply is what pretty much every hifi amp uses. The important thing is that the capacitors should be high quality and bypassed with good quality small value capacitors (100nF-470nF). I used 2x4700uF per supply rail for my LM3886 amp

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