This is a just been to the Chiro repost . My back has taken a turn for the worst and I do need a smaller head . I had this add up before and changed my mind after hearing it again at a gig but now I don't have a choice . This is the best sounding amp I've owned since I had a Magnavox era early 70's SVT that I used from 73 till 1980 . Great Ampeg tone and the Crown has enough power and flexibility for about any gig . About 50 pounds lighter than an SVT too and sounds close . The preamp is lighter than the poweramp and in the SKB the whole thing isn't bad to haul but I'm wanting to make my load a little smaller so I'd like to trade for a Genz Benz Steamliner 900 or 600 plus some cash or Mark bass F1 or even a Little Mark plus some cash . Where I practice it's hard to get my bass , head and laptop bag with tuner, cable and strap in one trip and with a small head like the GB I could put it in the bag and make one trip . Pre has new JJ tubes and is in great condition . I don't think it has the output mod but has no trouble driving the Drivecore to full power . I have the pre and poweramp hooked to a Hosa Y adapter for the power cords so there is one power cord for the rack and the pre and poweramp are wired together so hookup at the gig is just like a regular amp head , just your bass cable and speaker cable . Cash price would be $650 but would rather trade for a SL 900 . Cash price would include Pre , amp and rack and manuals for both . Specs on Crown: Minimum Guaranteed Power per channel, both channels driven: 775W, Stereo, 2 Ohms (per ch.); 525W, Stereo, 4 Ohms (per ch.); 300W, Stereo, 8 Ohms (per ch.); 1050W, Bridge-Mono, 8 Ohms; 1550W, Bridge-Mono, 4 Ohms; Sensitivity (for full rated power at 4 Ohms): 1.4 Vrms Frequency Response (at 1 watt, 20 Hz - 20 kHz): +0 dB, -1 dB Signal-to-Noise Ratio Rated as dBr to full rated 8Ohm power output (A-Weighted): XLS1500 > 103 dB Damping Factor (8 Ohm): 10 Hz to 400 Hz: > 200 Crosstalk (below rated 8Ohm power): At 1kHz: > 85dB; At 20kHz: >55dB Input Impedance (nominal): 20 kOhm balanced, 10 kOhm unbalanced Load Impedance: 2 to 8 Ohm per channel in Stereo; 4 to 8 Ohm in Bridge Mono Pre is 9 pounds , Crown is 8.5 and rack is 8.5 so the whole rig is 26 pounds . $650 shipped , can't do paypal . USPS money order preffered .