Page 20 of the manual explains how it is done. Kind of silly but....

On the Bose remote:
Press and hold the mute button until the following happens:
the system mutes the audio and plays 3 descending tones and the status indicator flashes amber 3 times. Release the mute button.

Do this again and the bass is returned to normal.

There are two base levels. I have mine set to less base. Setting technique is in the instructions and it's easy to do. Now it's not overpowering.

Hold the mute button on the remote till the system beeps (this lowers the bass level)

Yes. In the Bose manual they cover how to lower the bass. Here is the text from the manual:

To select the decreased bass setting
1. Point the remote at the system.
2. Press and hold the Mute button until the following happens:
The system mutes the audio, plays three descending tones (going down) and
flashes the status indicator (page 19) amber three times. Audio returns and the
status indicator turns solid amber.
3. Release the Mute button.

To return to the normal bass setting
1. Point the remote at the system.
2. Press and hold the Mute button until the following happens:
The system mutes the audio, plays three ascending tones (going up) and
flashes the status indicator (page 19) green three times. Audio returns and the
status indicator turns solid green.
3. Release the Mute button.

Thanks for your question. The Solo system features a bass reduction mode. Please see the following article for further information: http://bit.ly/1dFVOsT

If you have any other questions, our technical support team will be happy to help. They can be reached at 1-800-380-4831 and are available 8:30am-10:00pm M-F, 9am-7:00pm Sat EST. Thank you.

The Bose Solo can hold no more than 40 lbs (18 kg).

I connected my Bose Solo to a 48" Sharp with no issues. The concern is the size of the base of the TV. The base of mine was the same size as the Solo, so it fit fine. You should not allow the base to hang over the edges of the Solo since it would make the TV unstable and it could fall. My Sharp fits and is not unstable, so perhaps yours will too. The Solo is 12" front to back and needs at least one more inch for the cables. It measures 21" across the front.

Will work very well in any room in your house.

I used the line that was supplied with the Bose Solo. Plugged it into the back of my Panasonic 47" TV. Plugged the Solo into the wall socket and I was set to go. Took all of five minutes to hook up.

I used the Optical cable- Connect Optical cable that came with system. 1-connect to Cable box Optical plug 2. Optical to Bose system. Thats it! No connect to the Tv is needed if you have cable box.

The Bose Solo comes with two connection cords: a RCA plug and an optical digital cord. Coaxials can be used but are not provided.

The Bose Solo comes with both the optical audio cable and the normal red/white stereo audio. My TV had the optical, so I chose to use that cable.

If your new TV has an "optical digital output" (& most new TV's do) then U will need nothing, as it comes w/the optical digital audio cable. Remember to turn OFF the internal speakers on your new TV or U may get kinda like an"echo" using both the TV's spkrs & the BOSE.

The measurements I took of my own Solo are 21" by 12". The manual says it is 20" by 10-1/4".

Height: 3 in (7.6 cm)
Width: 20.75 in (52.7 cm)
Depth: 12.25 in (31.1 cm)
Weight: 10.1 lbs (4.6 kg)