Reference tube preamplifier from Audio Research. Fully balanced. All inputs can both be used balanced and single ended.

A full new set of tubes have been fitted by the dealer in 2022. This Audio Research supplied tube set was 1.625 euro.

This Reference 6 has been supplied by the former official Dutch distributor. It comes with the original box, manual and metal remote. Newprice: 16.490 euro (pricelist is available), now for 7.750 euro.