BL2 pre-preamp. Used to convert Single ended connections to balanced. I purchased this to use with my LS5/II preamp, but never installed, as my amps are not balanced. I did try it, and it works as it is supposed to.
Time to clear the shelves!
Only flaw I can see is a slight blemish on one of the selector knobs. Could be a 8 or 9 except for this.
Here is what Bill Johnson had to say about it - excerpt from a stereophile interview:
"Although I will say that, in recent years, we've been able to design good-sounding solid-state products—like the BL1 and BL2—that have only unity gain. We're using an IC chip with significant buffering both before and after it, and we've found that we can just about equal vacuum-tube sound with that, providing we stick with unity gain. The minute we try to have significant amplification with them, of course, the results are not as good. "
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