gainclone and equalizer

JOJO847 · 30th May 2005, 11:51 AM

Helloo

What do you think about tone controls for lm3886 ?
I'm planing to build this project
http://www.web-ee.com/Electronic-Pro...ic/index.shtml

so, i want to hear your opinion about this project

PS: I'm sorry if someone already asked this question

slackman · 30th May 2005, 12:34 PM

Hi Jojo,
if you want to build a GC to improove the sound quality of your existing system (that's mostly the reason why people build ther own amp) than an equalizer makes no sense, esp. that one from your linked project.

If you plan to build an integrated amp with all klicki klacki, feel free to implement everythink you want... But than you don't need the LM - chips - take cheaper ones (TDA,...).

Michael

JOJO847 · 31st May 2005, 09:25 PM

look my situation and help me

Let's say that my speakers are good ( dali 4ohm 100w 3 system )
And yes, i want to improove a sound quality.
So, lm3886 is an good choice but without tone controls?

macboy · 1st June 2005, 02:02 PM

I would recommend basic bass/treble tone controls rather than a five band EQ. A nice example of such is Rod Elliott's Hi-Fi Preamplifier. And his Expandable Graphic Equaliser circuit almost certainly outperms the one that you referenced.

No matter which you choose to build, do not use LF347 opamps! I almost choked when I saw those in that EQ circuit. The PCB for that circuit is designed for quad opamps, so a suitable replacement would be National's LM837. You could also try the TI/Burr-Brown OPA4134 but they cost a lot more.

JOJO847 · 1st June 2005, 09:02 PM

and what about TL074?

macboy · 2nd June 2005, 01:22 PM

TL074 will work fine, and will be a big improvement over LF347. It is a little noisier than the others I mentioned (but by no means too noisy).

30th May 2005, 11:51 AM	#1
JOJO847 diyAudio Member Join Date: Apr 2005 Location: grebza	gainclone and equalizer Helloo What do you think about tone controls for lm3886 ? I'm planing to build this project http://www.web-ee.com/Electronic-Pro...ic/index.shtml so, i want to hear your opinion about this project PS: I'm sorry if someone already asked this question

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30th May 2005, 12:34 PM	#2
slackman diyAudio Member Join Date: Mar 2005 Location: Germany, lower saxonny (Bremervörde)	Hi Jojo, if you want to build a GC to improove the sound quality of your existing system (that's mostly the reason why people build ther own amp) than an equalizer makes no sense, esp. that one from your linked project. If you plan to build an integrated amp with all klicki klacki, feel free to implement everythink you want... But than you don't need the LM - chips - take cheaper ones (TDA,...). Michael

31st May 2005, 09:25 PM	#3
JOJO847 diyAudio Member Join Date: Apr 2005 Location: grebza	look my situation and help me Let's say that my speakers are good ( dali 4ohm 100w 3 system ) And yes, i want to improove a sound quality. So, lm3886 is an good choice but without tone controls?

1st June 2005, 02:02 PM	#4
macboy diyAudio Member Join Date: Oct 2003 Location: Ottawa, Canada	I would recommend basic bass/treble tone controls rather than a five band EQ. A nice example of such is Rod Elliott's Hi-Fi Preamplifier. And his Expandable Graphic Equaliser circuit almost certainly outperms the one that you referenced. No matter which you choose to build, do not use LF347 opamps! I almost choked when I saw those in that EQ circuit. The PCB for that circuit is designed for quad opamps, so a suitable replacement would be National's LM837. You could also try the TI/Burr-Brown OPA4134 but they cost a lot more.

1st June 2005, 09:02 PM	#5
JOJO847 diyAudio Member Join Date: Apr 2005 Location: grebza	and what about TL074?

2nd June 2005, 01:22 PM	#6
macboy diyAudio Member Join Date: Oct 2003 Location: Ottawa, Canada	TL074 will work fine, and will be a big improvement over LF347. It is a little noisier than the others I mentioned (but by no means too noisy).