's are soldered into
& 2. The last output position is slotted and used for rolling.
This was the first opamp installed at U3 in the finished Bugle. It
seemed very detailed over the Cambridge 540p. In comparison it excelled
in all areas, bass, detail, organic midrange, top end cohesion, leading
and trailing transients, calmer, on and on. It kicked ass. Now this is
the preamp overall, I suppose, but you have to start talking about this
opamp somewhere. This opamp ran in the preamp for 3+ months. In a
direct comparison to the 2888P it turns out that this opamp is warmer,
grainier, slower, and thicker. Duller, in a word.
This opamp ran in the preamp for several months. I put the 2604 back in
for a side of an LP then dropped the 2228P back in. The 2228P was more
open, lively & dynamic. Not that much more detailed if at all.
I had already been noticing much more bass extension on the 2604.This
was the same with the 2228 but there was more
ambience overall. This 2228P has some verve that the 2604
does not have. Tasty. It was faster, and sweeter, but the detail was
never overly forthcoming. Sweetness is it's forte. Very
Burson discrete opamp
Increase in detail but bass dropped out, very thin, organic whole and
presence disappeared, magic all gone. Damn, I had high hopes for this.
Full bodied sound is back with the OPA2228P back in.
More open, more layered than the OPA2228, or rather you can see
separate when they play in unison - this is nice. Bass is a different,
more in control and deeper, whereas the OPA2228 was warmer,
fuller, fuzzier. I like both. Voices are more
'nuanced'. The top end is 'crisper' and more defined, cleaner, and more extended. There is more bite which is a step
back in 'romance' but the midrange tone is better in that respect. The
overall Richness is down but tone is cleaner, differentiated, and so there
is actually MORE colors at the cost of this Richness
After about 40 hours of break-in the detail and layering are far better
than the OPA2228. The crispness has diminished and the whole
thing is smoother.
This delivers more definition, adds air to the midrange. I like the bass on either
equally. I got these AD825s from Reference Audio Mods
just music that was previously colored by each opamp in play. Doesn't seem like anything added or taken away. Transparent.
surface noise and open-ness which
makes it dynamic by just reducing the noise floor.
I placed this opamp in the Pro-Ject HeadboxII headphone amp and
the detail in combination with the Bugle jumped up. Transparent is the best description.
click for a larger image
Added wood to the top for damping