500 watts of pure Class-D power that weighs 8 lbs, the Hartke LX5500 does the heavy lifting so you can drive the band.A 21AX7 tube preamp brings out the true character of your bass so you can sculpt it with the tone stack EQ before handing it off to 500 watts of real output power. The Hartke Tone Stack features a Shape knob that gives you precise control over midrange, as well as a brite button to boost high frequencies and highlight natural harmonic overtones for a distinct, vivid sound.Every bass needs compression, and better you dial it in than someone else. The LX5500 has an onboard compresser so front of house gets punch, pressence, and consistency, instead of an unpredictable or squashed bass tone. Speaking of tone, the 5500 also has a drive control that you can use to give your bass a 5 o'clock shadow, or max it out to achieve full fuzz!The LX5500 plays well with others thanks to a variety of I/O options, including an XLR direct out with a pre and post EQ selections for direct connection to a PA or recording console. There's an 1/8” headphone output that's ideal for silent practice sessions and an 1/8” auxiliary input can be used to connect phones or MP3 players.Features500 watts of continuous power @ 4 ohmsClass D bass amplifier that weighs 8lbClassic 12AX7 Class A tube preamp circuitryTone stack EQ with Bass, Treble, Shape and Frequency controlsBrite button for top-end presenceDrive circuit for added distortion effectCompressor knob controls bass dynamics1/4″ input jack compatible with active and passive instruments1/4" and twist-and-lock speaker jacks (compatible with Speakon® connectors)1/4" Effects Send and Return jacks1/8" Aux input1/8" Headphone output1/4" Tuner OutputBalanced XLR direct output with pre/post switchOutput Mute switch Hartke HALX5500 500W Class D Bass Amplifier.