Todd,
Yeah, Sean likes the Havana! I have the Balanced version, and I recently bought a second one for my Druids system.
The Balanced Havana comes stock with PCM56P-J, which people seem to agree is a slight improvement over the PCM56P that comes stock in single-ended Havana. I went further and replaced the J chip with Malaysian PCM56P-K, from a trusted source (Mouser) and there is no question these improved resolution a bit, have a more spatially rewarding presentation, and firmed up the bass resolution and quality audibly. I now have moved this DAC to my Druid V system.
In my Def4 system I installed the more recently-acquired Havana Balanced, and swapped out the stock chips with AD1856. Keeping in mind that the Balanced Havana sounds meatier and more tone-dense than single-ended Havana (and of course I have to buy 4 chips), the AD1856 is a different sound still within Havana strengths. On other forums, there's been some criticism about the AD1856 making Havana sound "electronic." I don't agree with this -- I can usually trace that criticism to associated gear and to headphones. AD1856 chips give the Havana more resolution, somewhat leaner more truthful (less euphonic) bass, and lays out a more precise soundstage and placements.
It's not shape-shifting or revolutionary, but there's a little less of the boomy, bursty fun of the PCM56P-J or K. You retain the basic tonality strengths of this circuit. Again, to get the best sound you have to rest these DACs on the right footers. I've tried a lot of contenders, and Aurios Media Bearings still win out. I imagine Rollerblocks would do OK too.
My next upgrade will be replacement of the output caps, but there's less available room relative to four being needed than for the two in the single-ended DAC, so my choices are fewer. Still contemplating that.
All the mods done to your DAC prior to you buying are good interventions. I'll just add that the WE 396A/2c51 is really a 396 as far as I can see, compared to a real Bendix or Tung-Sol 2c51. I encourage you to find one of those. The Bendix 6385 is allegedly the grail tube in these DACs, but I have found it slightly bleaching of tone, while giving very good definition. I may return to them for the Druid5 system DAC with the PCM56P-K. The 1964 Bendix 6385 is definitely not the best match to the AD1865. My real 2C51s are great with that chip.
Whether you will prefer the AD1865 in a single-ended Havana depends on the rest of your system and your hot buttons. Hard to predict without knowing more.
Phil
Yeah, Sean likes the Havana! I have the Balanced version, and I recently bought a second one for my Druids system.
The Balanced Havana comes stock with PCM56P-J, which people seem to agree is a slight improvement over the PCM56P that comes stock in single-ended Havana. I went further and replaced the J chip with Malaysian PCM56P-K, from a trusted source (Mouser) and there is no question these improved resolution a bit, have a more spatially rewarding presentation, and firmed up the bass resolution and quality audibly. I now have moved this DAC to my Druid V system.
In my Def4 system I installed the more recently-acquired Havana Balanced, and swapped out the stock chips with AD1856. Keeping in mind that the Balanced Havana sounds meatier and more tone-dense than single-ended Havana (and of course I have to buy 4 chips), the AD1856 is a different sound still within Havana strengths. On other forums, there's been some criticism about the AD1856 making Havana sound "electronic." I don't agree with this -- I can usually trace that criticism to associated gear and to headphones. AD1856 chips give the Havana more resolution, somewhat leaner more truthful (less euphonic) bass, and lays out a more precise soundstage and placements.
It's not shape-shifting or revolutionary, but there's a little less of the boomy, bursty fun of the PCM56P-J or K. You retain the basic tonality strengths of this circuit. Again, to get the best sound you have to rest these DACs on the right footers. I've tried a lot of contenders, and Aurios Media Bearings still win out. I imagine Rollerblocks would do OK too.
My next upgrade will be replacement of the output caps, but there's less available room relative to four being needed than for the two in the single-ended DAC, so my choices are fewer. Still contemplating that.
All the mods done to your DAC prior to you buying are good interventions. I'll just add that the WE 396A/2c51 is really a 396 as far as I can see, compared to a real Bendix or Tung-Sol 2c51. I encourage you to find one of those. The Bendix 6385 is allegedly the grail tube in these DACs, but I have found it slightly bleaching of tone, while giving very good definition. I may return to them for the Druid5 system DAC with the PCM56P-K. The 1964 Bendix 6385 is definitely not the best match to the AD1865. My real 2C51s are great with that chip.
Whether you will prefer the AD1865 in a single-ended Havana depends on the rest of your system and your hot buttons. Hard to predict without knowing more.
Phil