Sire Marcus Miller M6 Headless 4 Blue Swirl

An M6 Bringing the "Custom" Aesthetic into the Range

Traditionally associated with custom-made instruments, the Swirl finish now appears on a version of the Sire M6 line, a series that has been popular since its launch. This version retains the modern DNA of the M6 (playability, ergonomics, tonal palette) while adding a bolder visual signature designed for bassists who want an instantly recognizable instrument, both on stage and in the studio.

Which Bassists and Styles Is This M6 Ideal For?

Thanks to its clearly modern approach (24 frets, relatively flat radius, advanced active electronics), this Sire M6 "Blue Swirl" is particularly suited for intermediate to advanced bassists seeking precision and practical settings for real-world playing. It excels in styles requiring solid, controlled low end as well as attack and definition: funk, rock, pop, fusion, gospel, modern metal, and studio contexts where it's important to sit well in the mix. The headless format will also appeal to those who prioritize ergonomics and a "compact" instrument feel without sacrificing playing comfort across the entire neck.

Sound Character: Wood, Sustain, and Electronics Serving Versatility

The combination of Mahogany and Swamp Ash is a modern classic: mahogany provides a denser, warmer foundation with present low-mids, while swamp ash contributes a more lively and articulated response with clear attack. This blend helps achieve a sound that is both full-bodied and defined, very useful when alternating fingerstyle, slap, pick, or more contemporary techniques.

The bass features Marcus Pure-H Revolution Set pickups and a Marcus Heritage-3 preamp with Middle Frequency Control. The main advantage lies in the midrange shaping: the Middle control combined with the Freq knob allows selecting the frequency area to emphasize (to cut through a rock mix, enhance growl, or conversely scoop for a more "hi-fi" slap). Dedicated Treble and Bass controls complete this tonal sculpting, while Volume and Tone provide immediate, musical, and effective adjustments.

Technical specifications

Left handed	No	Nbr of strings	4
Strings	Steel	Color	Blue

Type	electric bass	Nut	Graphtech TUSQ XL
Wood	mahogany and swamp ash	Nut width	42 mm / 1.65"
Finish	Blue Swirl	Configuration	4 strings
Profile	C-shape	Bridge	Sire Headless Individual Bass Bridge
Body/neck joint	4-bolt ring	Hardware color	black
Fingerboard	rosewood	Pickups	Marcus Pure-H Revolution Set
Number of frets	24	Preamp	Marcus Heritage-3 with Middle Frequency Control
Scale length	25.5" / 648 mm	Controls	Volume / Tone / Treble / Middle / Freq / Bass variation SW
Radius	16" / 406.4 mm	Feature	headless design