OMW - I am so sorry, Absolutely forgot to mention one of the most important add on to these beauts - variable high-pass alignment filter (To make the lows even lower -

Included in the price.

Bowers and Wilkins' Matrix 800 series of speakers from the late 1980s through the mid-1990s were designed directly to John Bower's vision as part of a system incorporating an active, dedicated low-level filter in the preamplifier signal path to optimize the bass performance, not only in frequency, but also in the time and phase domains.
This dedicated bass equalizer, also called a variable high-pass alignment filter, was often included with the speakers since its frequency response is an integral part of the systems' sixth-order design, however, some speakers were purchased without it, necessitating finding one of these filters on eBay today, as this one was acquired for $110 in 2011.
Someone come fetch these speakers please!
T