Mesa/Boogie Bass 400+

The Mesa/Boogie Bass 400+ is a legendary all-tube bass amplifier head, celebrated for its immense power, tonal versatility, and durability.

History of the Mesa/Boogie Bass 400+

• Introduction (1980s): The Mesa/Boogie Bass 400+ was introduced in the mid-1980s as an evolution of the original Bass 400. Designed to deliver unparalleled power and tonal flexibility, it quickly became a favorite among professional bassists. The '400+' name refers to its ability to produce over 500 watts of power using 12 fan-cooled 6L6 tubes in its output stage, making it one of the most powerful tube bass amps of its time.
• Design Features: The Bass 400+ features two inputs (for active and passive basses), separate volume controls for each input, and a 3-band EQ with pull-shift options for bass and treble frequencies. It also includes a 7-band graphic EQ for precise tonal adjustments, a built-in limiter to prevent distortion, and an XLR balanced output for direct recording or live sound reinforcement. Its rugged construction and fixed-bias design ensure reliability in demanding performance environments.
• Tonal Characteristics: Known for its warm, punchy tube tone, the Bass 400+ excels at delivering deep lows, articulate mids, and smooth highs. Its dynamic response and headroom make it suitable for a wide range of genres, from rock and metal to funk and jazz.
• Legacy: The Bass 400+ remained in production for over two decades, earning a reputation as one of the most iconic tube bass amps ever made. Though discontinued, it continues to be highly sought after by bassists who value its unmatched power and tonal character.

Popular Settings

• Classic Rock:
  • Bass: Boosted slightly (1 o'clock)
  • Midrange: Flat or slightly boosted (noon)
  • Treble: Noon
  • Graphic EQ: Slight boost at 100 Hz and 250 Hz.
  • Ideal for punchy, well-rounded tones.
• Funk/Slap Bass:
  • Bass: Boosted (2 o'clock)
  • Midrange: Slight cut (11 o'clock)
  • Treble: Boosted (2 o'clock)
  • Graphic EQ: Scoop mids around 625 Hz.
  • Perfect for tight lows and crisp highs.
• Metal/Heavy Rock:
  • Bass: Noon or slightly boosted
  • Midrange: Boosted (1-2 o'clock)
  • Treble: Noon
  • Graphic EQ: Boost at 40 Hz and 1.6 kHz.
  • Suited for aggressive growling tones.
• Studio Clean Tone:
  • Bass/Midrange/Treble: Flat
  • Graphic EQ off or used sparingly.
  • Engage limiter for consistent output.
  • Suitable for jazz or pop styles.

Notable Players

The Mesa/Boogie Bass 400+ has been used by numerous legendary bassists across genres:

• Paul McCartney (The Beatles/Wings): Known for his melodic bass lines and warm tone.
• Michael Anthony (Van Halen): Relied on the amp's powerful low-end punch during live performances.
• Mark King (Level 42): Used the amp to craft his signature slap bass sound.
• Stanley Clarke (Jazz Fusion): Valued the amp's clarity and dynamic response in complex arrangements.
• Jack Blades (Night Ranger): Appreciated its ability to cut through dense rock mixes.

Summary

The Mesa/Boogie Bass 400+ remains an enduring symbol of high-performance bass amplification. Its combination of raw power, tonal flexibility, and reliability has solidified its place as one of the most respected tube amps in music history.