Benchmark Preamps and Amp - For real?


Has anyone here listened to the Benchmark HPA4 or LA4 preamps and the AHB2 power amp? Their specs are unreal in terms of lack of distortion and signal to noise. How do these units sound? I am intrigued. Thanks. 
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@dr_joe  What was the result of your comparison of the LA4 against the big Boulder?
I'm currently auditioning a LA4, driving a Don Sach's KT88 amp. My previous experience with the Benchmark DAC2 left me with the expectation that it would be cold, analytical and ultimately un-involving. I was wrong.
It was very bright out of the box without a lot of bottom end. After a few days of burn in, it became extremely balanced and transparent. It gives a blank canvas for the amp to put down its finesse, power, and holographic imaging. I can agree with the Sterephile's review on the open window created by the incredibly wide dynamic range. The music is still very engaging. It's missing the magic harmonics of a good 6SN7 tube preamp, but I'm tempted to say the transparency more than makes up for that. I don't know if it's possible to have both attributes in spades.
@dr_joe  I'm very anxious to hear your opinion on the comparison.

I have a pair of AHB2'S, with a Tortuga Audio LDR passive preamp in front of them, and I'm really wanting to get the LA4.

I would love to hear how it sounds versus the Boulder, in your system m
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