Sire Marcus Miller M7 Swamp Ash-4 Fl Nt En

A modern take designed for precision and expression

This M7 Swamp Ash-4 FL NT EN clearly belongs to the category of modern performance-oriented basses. Its design focuses on versatility, stability and definition, with carefully selected tonewoods chosen to meet the demands of contemporary playing. The fretless version also adds a highly distinctive musical dimension—more vocal, more fluid and often more refined in its phrasing.

Within a range of contemporary basses, this model stands out through its comprehensive approach: resonant tonewoods, advanced electronics, rugged hardware and ergonomics designed for both stage and studio use. The " New modern bass " format confirms its aim of offering an instrument with a distinctive look, comfortable in the hands and capable of covering a broad sonic spectrum.

Who is this 4-string fretless bass for?

This bass is primarily aimed at intermediate to advanced musicians, as well as experienced bassists wishing to integrate fretless playing into their sonic palette. The absence of frets requires a precise left hand and good intonation control, but in return it offers an exceptionally lively touch and unique musicality.

It is particularly well suited to styles where expressiveness takes priority: jazz fusion, soul, modern funk, sophisticated pop, gospel, instrumental music and more atmospheric settings. Thanks to its comprehensive active electronics and passive mode, it can also prove highly effective in more straightforward contexts, whether in rehearsals, live performances or recording sessions.

A clear, singing and highly nuanced tone

The swamp ash body provides a fast response, excellent openness across the frequency spectrum and a tight low end without excessive weight. This tonewood is valued for its ability to let the playing breathe, with clear lows, open highs and an immediate sense of dynamics beneath the fingers. On a fretless bass, this liveliness helps maintain clarity, even in the most fluid phrasing.

The maple neck adds attack and stability, while the ebony key enhances contact precision and articulation clarity. This combination works particularly well on a fretless instrument: the maple supports presence and definition, while the ebony encourages a fast, tight and detailed response. The result is a sound that can sing in the midrange while remaining clean in the low end.

The Marcus Pure-H Revolution set combined with the Marcus Heritage-3 preamp provides extensive tonal control. The volume and tone controls on a dual concentric potentiometer, pickup blend, bass and treble adjustments, and midrange control with frequency selection allow the instrument's character to be finely shaped. The active / passive mini toggle adds genuine versatility: in active mode, the bass can become more sculpted, more modern and more punchy ; in passive mode, it often delivers a more organic and immediate response.

The Heavy Mass Custom bridge also contributes to the overall stability, sustain and solid feel of each note. On a fretless bass, this component matters greatly: it helps maintain excellent note sustain, smooth slides and the famous " singing " character sought by many bassists.

Recommended compatible accessories

You can safely pair it with a set of long-scale 34" / 864 mm 4-string electric bass strings. To enhance the comfort of fretless playing and achieve a softer touch, flatwound or half-round strings are often an excellent choice. A standard 6.35 mm jack instrument cable will also be perfectly suitable for this bass, whether you play in active or passive mode.

Technical specifications

Left handed	No	Nbr of strings	4
Strings	Steel	Nbrs of frets	0

Type	4-string fretless electric bass	Nut width	38 mm / 1.50"
Body	swamp ash	Inlays	pearloid
Format	New modern bass	Bridge	Marcus Miller Heavy Mass Custom
Finishing	Natural	Tuners	black Sire Diecasting Gear
Weight	3.80 kg	Pickup set	Marcus Pure-H Revolution Set
Neck	maple	Preamp	Marcus Heritage-3 with midrange adjustment
Profile	C	Controls	Volume / Tone on dual-gang potentiometer
Scale length	34" / 864 mm	Switch	active / passive mini toggle
Key	ebony	Color	natural
Radius	12" / 305 mm	Orientation	EN version
Configuration	fretless