I got delivery of the MK2 with Bybee purifiers upgrades about two months ago. I waited very long to do the upgrade as I just kept thinking that this was minor improvement. WRONG! After listening to all my favorite music with the MK2 + Bybee upgrades, I'm asking to myself why I waited so long!
Based on before and after performance, this upgrade should have been labeled MK4 or MK5. It is that much of an improvement. The first thing I noticed about the new mono-blocks was that these are totally different amplifiers in many ways. They still retain all the exceptional qualities of the SE mono-blocks, such as absolute control over the speaker drivers, while at the same time elevating the overall sonic performance to make these mono-blocks go head-to-head with the best amps, regardless of price.
There is more extension at the lower frequencies. This comes with the speed, tautness, clarity and texture rivaled only by live music. The mid frequencies are as neutral as I've ever experienced. The highs are simply crystal clear with an uncanny level of definition. The sound is so transparent and well defined that one can tell if the musicians in the recording are using cheap instruments or expensive ones. Image definition went from high-def to ultra high-def.
I was so perplexed by how different the MK2 mono-blocks are that I had to ask around to find out more about what's in the MK2 amps. I found out that about 70% of the improvements I'm hearing is due to the Bybee purifiers.
