TL074 replacemenit in Behringer ada8000 - diyAudio
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Old 7th October 2004, 09:58 PM   #1
kimarin is offline kimarin  Norway
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Thumbs up TL074 replacemenit in Behringer ada8000

I have a Behringer ada8000 AD /DA ADAT 8ch mic preamp where the
input's and output's op-amps are TL074. I want to change this to some better op-amps. I'm considering the OPA3134 or AD713.
Anyone who knows what's best of these two or if there excist better op-amp's here
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Old 7th October 2004, 10:21 PM   #2
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Good result give you OPA 4134 ( if give Behringer today TL 074 to the audio circuits, is big p.. ).
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Old 8th October 2004, 01:00 AM   #3
sss is offline sss  Israel
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if u are looking for "the best" try
opa627 or ad797
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Old 8th October 2004, 01:07 AM   #4
00940 is offline 00940  Belgium
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you're looking for soic or dip package ?

there's the opa4227 too.
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Old 8th October 2004, 01:50 AM   #5
kimarin is offline kimarin  Norway
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I need to use a 4 ch soic op-amp. I will replace 8 of them ,and if I'm gone use 1 or 2 ch op-amp's I will have a construction problem. It won't fit inside. The opa4227 seems interesting. I'll have to check it out. thanks 00940. In the end I'll probably f... this preamp up. Want to make the whole signal path from the input to the A/D converter better. Probably change the el. cond.
to polypropylen cond. This preamp is soo cheap anyway so I can afford to play with it
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Old 8th October 2004, 10:46 AM   #6
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Since you are replacing a TL074 you really need the "drop in" replacement opamp to have FET inputs (if you don't have the schematic for the Behringer). The input bias currents of an ultra low-noise bipolar opamp like the AD797 may be too big for the circuit at hand.

The BB OPA4134 should be a solid choice but don't expect magic. If implemented correctly the TL074 isn't all that bad.

/Magnus
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