Based on reviews I've read, the Job can sound somewhat dry. So I can understand the possible concern as some horn speakers already sound very crisp, energetic, forward and somewhat dry......which is why people often pair a warmer, rounder, sounding amp (if not tubes) with horns. The synergy is great. I don't believe I've read anywhere that the Job has any tubelike qualities, so I'd caution against the Job with horns.....but, this is just conjecture. Typically, the power from an amp like the Job isn't necessary with horns either. So if the speakers are an easy load, I'd go with something more natural sounding, yet detailed and musical, like a used Pass Labs (maybe Aleph series) or something from First Watt, if not tubes in the 30-50 Class A watt range.