bronth
New Head-Fier
- Joined
- Sep 4, 2008
- Posts
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Quote:
I concur - the Mullard EF92/BB OPA2107 combo has great synergy that adds more definition and separation compared to the stock combo. It works VERY well, especially with classical music, albeit being a bit on the 'solid state' side of things. Actually I got completely another LD I+ with more 'expensive' sound for just $18 - for both op-amp and NOS tubes incl. shipping!
BUT - and this is a big BUT - recently I reversed LD I+ to the stock op-amp and added Russian 6ZH1P-EV military-spec tubes. These babies didn't like 2107 (too unbalanced sound) thus I decided to reverse the op-amp. And got another side of sonic heaven - it's completely different beast now, LD became more 'tubey', 'buttery' but it works EXTREMELY well and funny (esp. considering bass) with rock and not bad with classics.
Moreover - MC33078P has less tendency to sibilance with MOST not too well recorded vocals than 2107. And, I suppose, it has better overall compatibility/synergy with all 3 families of tubes. Now I think that David and Co. have chosen this op-amp not only for its paper specs and low price but they really did thoroughly use their ears during tuning.
33078 has lower slew-rate compared to 2107 (thus lesser transient response, i.e. less 'quick' sound) but it has very organic sound signature, full-bodied, with nice decay. Great and overlooked op-amp, IMO.
Originally Posted by wallace /img/forum/go_quote.gif After 5 months of messing with this fine little amp, Three op amps Four sets of valves, I am now using an A2107 op and Mullard EF92 cv4015/m8161 valves. Talk about smooth, trebles tamed , and i nearly have a soundstage Amp and phones are now staying.phew,at last. |
I concur - the Mullard EF92/BB OPA2107 combo has great synergy that adds more definition and separation compared to the stock combo. It works VERY well, especially with classical music, albeit being a bit on the 'solid state' side of things. Actually I got completely another LD I+ with more 'expensive' sound for just $18 - for both op-amp and NOS tubes incl. shipping!
BUT - and this is a big BUT - recently I reversed LD I+ to the stock op-amp and added Russian 6ZH1P-EV military-spec tubes. These babies didn't like 2107 (too unbalanced sound) thus I decided to reverse the op-amp. And got another side of sonic heaven - it's completely different beast now, LD became more 'tubey', 'buttery' but it works EXTREMELY well and funny (esp. considering bass) with rock and not bad with classics.
Moreover - MC33078P has less tendency to sibilance with MOST not too well recorded vocals than 2107. And, I suppose, it has better overall compatibility/synergy with all 3 families of tubes. Now I think that David and Co. have chosen this op-amp not only for its paper specs and low price but they really did thoroughly use their ears during tuning.