I've had my Acoustic Image Focus over a week now and am amazed that there have been very few comments about this amazing amp. If you aren't familiar with it you need to check it out. It weighs 4 lbs and pumps out 600 watts @ 4 ohms. I've been playing WW amps for over 20 years and presently own 2 Ultras and each day that passes since I've owned the Focus it is becoming my favorite amp. Don't get me wrong, I love my WW, but there is something about the Focus that really gives me what I want in my tone. It also blew away my iAmp 800. I'm presently using it with either a EA VL108 or VL208 and it is punchy as all get out using a passive J Bass. It doesn't sound very good however with my CXL cabs and the WW does a better job with those, but the tone I'm looking for is in the Focus/VL combination. I imagine the Focus would also sound great with the Berg 12's and I'm anxious to check it out. I've started this post for other Focus users because I know you're out there. Chime in!!