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Old 19th October 2013, 11:33 AM   #1
Dk90 is offline Dk90  Italy
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Default Beyerdynamic A1 clone gold, opamp rolling

Hi, i'm searching some info about rolling opamps in A1 clone gold and this seems the best place to ask about.
I have replaced the stock opamp with a BB2132, at home i also have BB2107 and a TLE2062CP, should i try this opamps?
And, sorry but my electronic background is poor, what are the characteristic that i have to consider on rolling opamp for the best match with A1 amp?
Thank you
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Old 25th October 2013, 06:19 PM   #2
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Opamp rolling without technical experience and proper high frequency test equipment is just asking for trouble! Often the opamp is poorly suited for the circuit in question, other times the opamp is oscillating at high radio frequencies.
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Old 25th October 2013, 06:24 PM   #3
Mooly is offline Mooly  United Kingdom
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What was the stock opamp to begin with ?
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Old 6th January 2015, 04:25 PM   #4
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DK90,

I have done extensive listening test with multiple opamps in my A1 clone (including OPA1641, OPA2209, LME49720HA, OPA211, OPA2604, OPA2134, ADA4627) and had the best results with:

1. LT1057 (very refined sound, my personal favorite in combination with Beyer T90)
2. OPA827 (Very detailed and spacious sound)
3. OPA602BP (Detailed, warm sound)

... all gave a massive improvement over the stock ST MC33078.
(btw OPA604, LME49990 and OPA1612 are unstable in the A1)

Regards,

Louis
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