Acoustic Image Contra

Bass amp and transistor switching power supply (hence the weight of 12.25 kg)
delivers 200W in standard and 300 W by adding another chamber (contra EX) http://www.acousticimg.com/products/prod_contra_ex.html
three-way speaker (tweeter (1pouce) that can be cut, a medium (5 inches) and a boomer (10 inches) that has the distinction of being underneath, with a raised stand for the whole
input jack (low or high z) but only one at a time, if you want two amplified instrument, take the coda.
pots:
level (gain), low, mid, high, brite
an effects loop (send in jack, and a jack in return for the level knob)
a filter (switch on / off switch and notch / HP, as well as for the frequency knob)
A master knob
DI output, and a ground lift switch
An LED power indicator
Behind two Speakon outputs including a speaker connected to a switch, a voltage selector switch (115 V / 230 V), a fuse and a switch to turn off the tweeter
the manual is available here http://www.acousticimg.com/manuals/manual_combo.pdf for BA 410
and here http://www.acousticimg.com/manuals/Manual-combos 20sIII.pdf% ( http://www.acousticimg.com/manuals/Manual-combos%20sIII.pdf ) for the latest model

UTILIZATION

You plug in all the pots right off the filter and you have the sound of the bass.

The filters are effective to color the sound more or less

I've never cranked despite the drummers, pianists, saxophonists and other electric guitarists.

SOUNDS

Amp designed to get the closest to the acoustic sound of the bass.

Before I had a sensor not great and the sound was still acceptable, even at the bow.
With my new sensor (full circle) I become even more precise

OVERALL OPINION

I use it for 3 years, the big advantage is that the manufacturer's warranty is 5 years

I tried lots of bass amps (SWR, Hartke, Ampeg, Ashdown, Fender, AER Basscube ...) and is the one that best reproduces the acoustic sound of the bass.

Jazz guitar sound really great on this amp.
Electric bassists he might prefer an ampeg, SWR a ...

The DI is an excellent quality, every time I'm with sound technicians can not believe it and asked me if acoustic image manufactures self DI

That amp is relatively expensive, but weighs only 12 kg, delivers 200 W and is guaranteed for 5 years

I recommend it to every bass player I met

You can move the bass in one hand and the amp in the other.