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Old 14th March 2014, 12:19 PM   #421
FdW is offline FdW  Netherlands
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Hi,

well probabely meet at the MOC in May anyway

Why is the circuit running on +-35V?
The OPamps supplies are the limiting the max. output to less than +-17Vpp.

jauu
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Yes I know, but it is what Ricardo wants
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Old 16th March 2014, 12:06 PM   #422
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i need it to run at +-35v because that is the psu I have at the moment.
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Old 16th March 2014, 01:35 PM   #423
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Today I finished second channel..... listening to the amp at 150mA now.

Completely different from previous build, much more airy and detailed. Bass is still present but not overwhelming. There is a noticeable improvement in attack and mid freq presentation..... more of this latter.
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Old 16th March 2014, 05:19 PM   #424
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Today I finished second channel..... listening to the amp at 150mA now.

Completely different from previous build, much more airy and detailed. Bass is still present but not overwhelming. There is a noticeable improvement in attack and mid freq presentation..... more of this latter.
That's a good start
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Old 21st March 2014, 10:17 PM   #425
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Originally Posted by RCruz View Post
Today I finished second channel..... listening to the amp at 150mA now.

Completely different from previous build, much more airy and detailed. Bass is still present but not overwhelming. There is a noticeable improvement in attack and mid freq presentation..... more of this latter.
More?
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Old 22nd March 2014, 06:36 AM   #426
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Have been listening for a while now.... No fatigue, very good dynamics, extended high frequency allied to a wide soundstage. Bass is no more over present if lacking a bit of control.
A very good little amp. This has been quite enlightening.
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Old 22nd March 2014, 11:32 AM   #427
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Very good. Thanks for the description.
Yes, an amp with that low power will never be a bass monster.
Other then that i am very happy that this project went so well.
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Old 22nd March 2014, 06:30 PM   #428
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I am very happy also and I must thank you and Frans for all the help.

It sounds really good.

Off course we have all the culprits of the opamp input.... I wonder what it could do with a "proper" discrete input stage.
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Old 22nd March 2014, 06:57 PM   #429
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That whould be a different animal and more complex.
There are of cause other Opamps that whould give a higher wattage.
You will be surprized that Frans big amp has an opamp input stage too. Of cause his circuit is very different of what we have here.
It is one of the best amps i heard so i think it is hard to beat modern Opamps at this point in the chain.
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Old 22nd March 2014, 08:11 PM   #430
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I will not dare to contradict you, but I used opamps before (mainly as preamps) and when I replaced those by buffers like the pedja buffer or now the incomparable dcb1, I get the idea these opamps (even the LME metal can) are no match for a simple discrete circuit.... maybe the feedback is killing the magic
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