What the PJB website says:
The Session 77 is remarkably affordable 100W bass combo from PJB. By using all digital circuitry, the amp will work on any AC voltage from 100 to 260 Volts without a voltage selector. It features a single channel pre amp with a 3-band EQ. It also has a separate auxiliary input for backing tracks.
The combination of the two proprietary 7 inch speakers and a 3 inch tweeter gives full range reproduction of all basses with stellar clarity. The Session 77 is the result of our effort to build a budget conscious amp without giving up our quest for quality. Focusing on the most basic needs of most bass players, we achieved the goal of having the best sounding, most reliable amp at an unbeatable price.
What we say:
All PJB amps are on the quieter side for their wattage, but represent really accurately the tone of the instrument you are plugging in. For acoustic bass and uBass instruments, where you want to hear that lovely woody thump coming through, they are a very good match. The onboard EQ on these amps is excellent, so if you need to shape your sound you can do so very easily.
This model, the S-77, has seven inch cones as opposed to the smaller cones you find in the more expensive, more compact PJB amps. As such, it is the most traditional bass combo in their range. If you want something smaller and more portable, but still with crystal clear sound and great performance, look at the CUB or Double Four amps.
Power Output: 100 Watt (RMS)
Speaker: 2 x 7” Proprietary PJB woofer + 3” Tweeter
EQ: 3-Band EQ (Treble, Mid, Bass)
Input: AUX-Input Jack, DC-Power Input Socket
Output: Line-Out, Headphone-Out
Other: Power Switch
Power: 100/240V AC
Dimensions(W x D x H): 17 x 11 x 12.5 inch / 432 x 290 x 317 mm
Weight: 28 lbs / 12 Kg