Breedlove’s Atlas series contains a number of different basses, including the ABJ250/SM4, which is made with Breedlove’s jumbo body (seventeen-inch lower body, along with a five-inch body depth at the tailblock and a four-inch body depth at the heel) with a smooth cut. The top is solid sitka spruce, while the sides and back are made of mahogany. The combination of sitka spruce and mahogany results in a deep, smooth sound.
Additionally, this acoustic bass produces decent volume as a result of the large jumbo body (not to mention the JLD bridge truss system, one of the few acoustic basses with one factory installed). One of the biggest complaints about acoustic basses is that they lack the volume needed to play without an amp. The ABJ250/SM isn’t loud by any means, but the volume is enough to play offline along with maybe two or three other guitars/mandolins/banjos, but with more than that, the bass would be overpowered.
What I really like about this acoustic bass is its clear separation of notes. I even used a pick and did some bluegrass and while you’d expect a distorted wall of bass, the notes came through cleanly.
ABJ250/SM4 Features [http://www.macnichol.com/mm5/merchant.mvc?Screen=PROD&Store_Code=MGAM&Product_Code=ABJ250_SM4&Category_Code=Jumbo] features a hardshell case, rosewood fingerboard and bridge, pearloid position markers, satin finish, Tusq saddle and nut, JLD bridge saddle, Fishman Classic IV pickup with bass-optimized EQ, chrome Grover tuners, satin finish, and an abalone rosette with black border.