Physical condition - excellent, there is a little bit of some tape residue on the back that I will clean off before sending Electrical condition - Unit is working just as it, no issues. I have recently acquired a very large collection of high-end audio from a world renowned collector and restoration specialist. I will be listing a part of it over the next week and then a larger part within a month. Please keep an eye on my listings for many great opportunities to find scarce pieces.

Audio Research SP6B in very good condition. No operational issues. May show light wear but excellent cosmetics overall. Serviced by Audio Research in 2019, which included a power supply recap, repair of mute circuit, reversal of previous owner’s modification to gain switch and replacement of bad tube. Selling to reduce inventory, keeping two SP3 series.

1 Audio Research SP6b tube preamplifier. Has phone stage. Original owner. The power on toggle switch is broken off. The unit works fine, but the toggle switch will have to be replaced or fixed. NO shipping. Pickup only.