Mesa/Boogie Bass 400+ Amp Head

Bass is the lynch pin between rhythm and melody …a big responsibility. The essential ingredients of great bass tone are Pitch, Punch and Power. Pitch, so the frequency of the note is identifiable and accurate, not the flubby rumble often heard. Punch, so the attack of each note is a precise event in time. And Power to deliver these two with authority and headroom …and to disembowel the first five rows! Artists often call to rave about the Bass 400+™ after switching from bi- or tri- amped rigs of up to a thousand watts—exclaiming the joy of stepping forward in the mix, even to the point of leading the band. String definition so articulate that the rhythm section locks together to become one machine of unstoppable momentum.

"Cragg pads down the output from the Deluxe and feeds it into a Magnatone 280 with stereo vibrato combo amp, and a Mesa/Boogie Bass 400 head with the highs EQ’d out," states [this article](http://www.guitarworld.com/neil-young-ragged-glory?page=0,1).

In this image we can see Les standing in front of his stage set up. The 400+ can be seen to the right of Les.

In 20:25, Matt shows his Mesa Boogie 400+ connected to an ampeg 8x10

In this photo, the Mesa Boogie Bass 400+ Amp Head is visible.

At 31:07, you can see Robbie's rack house a Mesa Boogie Bass 400+. This can also be seen in the video for Keep Away.

"I fell in love with that particular amplifier a long time ago already when I was, like, a kid."

seen in this video

"...the Mesa Boogie 400 +. We've got a main and a back up there," says John Campbell's guitar tech, at 28:06 in this rig rundown video.

This video shows some of the equipment used by Paulo for the recording of Sepultura’s album "Kairos". The Mesa/Boogie Bass 400+ can be seen at 2:25.

In the More Than Word Clip we can see his mesa boogie 400+

In the Bio of the old millencolin.com website he states that he used a Mesa Boogie "Big Chief" 400+ Amphead

Looks like the head he's using in the video