Martin Logan Depth i Subwoofer for sale. There are three 8 inch drivers in a radial configuration. Extensive controls including Level, Phase, Low Pass Filter, High Pass Filter and 25Hz level. Inputs include speaker binding posts for standard speaker cable, line in from preamplifier and LFE in. There are also sockets for sub out and line out. Well reviewed. All of the specs are available on line or from me. I bought this sub new in July last year (2014). It is under warranty until July 2017 (3 years). It has been very lightly used and is probably not even run in yet. It is in as-new condition and operating perfectly. Black cabinet with a cherry top. I am changing my main speakers to B&W 802s and a sub is unnecessary for me. I have all the documents and accessories but no box. Because of the weight (32 kg) it has to be a pickup only in Brisbane. The new price was around $3,500. Sell for $1,850. If you are interested, we can discuss. A really great subwoofer with excellent musicality and bass control.