Modified topkit (new opamps, but retain the stock buffers) - Putting the LMH6655 buffers back in improves the D4 bass response to be closer to the the P-51 bass (slightly below the Predator bass levels). This was much better sounding, and the overall sound was also a bit warmer and refined sounding than with the bypassed buffers. With Hans Zimmer "Batman Begins - Molossus" has deep throbbing bass and crisp strings, where I was wishing for just a little more bass without the LMH6655. The Pico sounded less clear and defined and more recessed in the mids vs the D4 with OPA1611 class-A/LMH6655, with both using their USB DAC. Wow!
So, in summary - the D4 with modified topkit (new opamps, stock buffers) is actually closest to the P-51 Mustang when feeding the D4 line-out into the P-51 with an 18G Jumbo Cryo Silver X mini-mini. I can go back and forth between the D4's built-in DAC and Amp and the D4's DAC feeding the P-51 and I am quite happy with both, finding them to sound very similar. I am leaving the D4 set up this way as a "P-51 clone" for the time being, and will be adding this information to my D4 review which I'll do soon. I have to run through a plethora of headphones and IEM again, with the new topkit installed.
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Leyendo un poco he visto que modificando el d4 este llegaría al nivel del p51 más o menos pero qué hay que meterle??
la pregunta va a mr arroyo claro
Te dire que hace un mes envie mi D4 junto a dos otros amplis a tres compañeros en Head Fi y no he podido probar el Top Kit que obtuve the Ron (HiFlight). El kit the Ron esta en mi despacho esperando a que mi D4 regrese, te dejare saber en un par de semanas. Una lastima que estemos tan separados pues me gustaria escuchar sus opiniones de equipos.
Ok ya me comentarás como va y en ese caso como podría metérselo.