This is a very nice Sonus 4/2 I've had for a few years. I really prefer passive electronics these days so it's up for grabs.

Here are the specs:
34" scale length
Graphite neck, phenowood fingerboard
No truss rod or adjustment! Neck relief and action are perfect for me though - action is medium low right now
Really comfortable Jazz-width neck
Original custom soapbar double coil humbucking pickups - this particular 4/2 has two bridge pickups and came from the factory that way.
Custom Zon/Bartolini preamp
Volume and blend controls, treble/bass is a stack knob
Mid control pot in the control cavity
Weighs 8.1 lbs, balances perfectly
The body wood looks like alder or poplar and has a gloss black finish
Black hardware, with black Schaller straplocks
Comes in the clean original Zon black tolex hardcase (not shown in the pic).

Other than a few minor scrapes and shallow, small dings on the body this is in excellent condition and plays like a dream. There aren't many Sonus 4/2s out there used.

For trades the ONLY things I'm interested in are:
Sadowsky USA UVP4 with Jazz width neck
Pedulla Rapture PJ 4 string
Epifani UL-310
Markbass Little Mark II head

Price is $1450 + shipping

http://home.att.net/~bwdell/blackZon42both.jpg

Bump for a great bass.

I own the 5 string version and it's an amazing instrument. Probably one of the best I've owned. If someone's looking for piano-like tone and unmatchable sustain, this is the bass.

Sold!