The LS-7 was, in my opinion, ARC's most "tubey-sounding" preamp after the LS-5. Subsequent models have been more neutral, though I believe the SP-16 might be similarly balanced tonally, It is not as good, IMHO, as the earlier LS-5 (very highly regarded by its owners), but it does have the advantage (unless your source components and amp are all balanced) of having single-ended, rather than balanced, inputs and outputs, making it more compatible with much of the equipment out there. I liked it much more than ARC's earlier hybrid preamps and line stages, and I'd assume that it should be pretty inexpensive at this tome, since it was inexpensive (for ARC) when it came out. If it's in good working condition (ask how long the tubes have been used) and the seller lets you try it in your system, you might like it, as it will give you an idea of the tube sound.
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