Sire Marcus Miller M6 Headless Electric Bass, 6-String

zZounds Gear Experts Say...
So technical, this bass feels like it was designed in a lab -- featuring a headless design, edgeless fretboard, 5-piece neck, and Marcus Heritage-3 preamp.

What's special about this item?

Feature: What it does:
Graph Tech Tusq nut Increased harmonics and sustain, rich tone
Headless design Lightweight; increases overall balance
Mahogany body Rich, warm, focused sound; added sustain
Rosewood fretboard Open, warm tone and smooth playing feel

Coming from the series of Sire modern basses is another contemporary bass, the M6 Headless. It is designed distinctively compared to previous Sire models, weighing less than 8 lbs (based on the 4-string variant) to prevent players from experiencing neck-dive and ensure enhanced comfort and balance in playing. Based on Sire's 4-string samples, the weights are 7 lbs 1 oz, 7 lbs 10 oz, 6 lbs 12 oz, and 7 lbs 8 oz. Equipped with a preamplifier and various switches, it is a highly versatile bass, catering to genres such as pop, rock, metal, blues, and more. The M6 Headless has 24 frets and is available in 4, 5, and 6-string variants. It comes with DR Dragon Skin+ premium bass strings and the official Sire gig bag when purchased.

Features:

- Lightweight body designed to reduce fatigue and enhance comfort
- Superb playable while retaining Sire's signature qualities
- Natural wood grain top with sandblasted finish
- Mahogany body with bolt-on, headless neck
- 5-Piece Hard Maple/Mahogany neck
- Rosewood Edgeless fretboard
- Marcus Pure-H Revolution Pickup set
- Marcus Heritage-3 Preamp with Middle Frequency Control
- Unique, expansive control knob layout gives complete tonal control
- Mini-toggles for added tonal control & pickup modes for passive/active operation
- Official Sire gig bag included

SIRE LIGHTWEIGHT BASS BODY
A finely crafted lightweight body designed to reduce fatigue and enhance comfort, delivering exceptional playability for extended performance sessions. It comes read more with a Sire gig bag when purchased.

SIRE M-HEADLESS BODY DESIGN
Introducing Sire's first headless bass model, crafted for headless enthusiasts seeking reduced weight and enhanced playability. Made from Mahogany or Swamp Ash with a sandblasted finish, this contemporary design delivers exceptional balance, precise tuning stability, and a sleek ergonomic experience for modern players.

MARCUS HERITAGE-3 WITH MID FREQUENCY CONTROL
A 3-Band preamp that includes volume/tone, blender, treble, bass, middle frequency controls, and a switch allowing articulate tonal options from the active or passive modes to attain any desired audio output of various players.
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Body Material: Mahogany
Body Shape: Sire M-Headless Shape
Body Color: MA.S (Mahogany Satin)
Neck Material: Hard Maple/Mahogany 5 pc
Neck Shape: C-Shape
Scale: 33"~35"
Fingerboard Material: Rosewood Edgeless (Rolled Fretboard Edges)
Fingerboard Radius: 16"
Frets: 2.4 mm Stainless Medium Jumbo, 24 Frets
String Nut: Graphtech Tusq XL/55.36mm nut width
Inlay: WH Pearloid/Abalone Rounded-rectangular Block
Neck Joint: Five Bolts Bushing
Pickup: Marcus Pure-H Revolution Set
Preamp: Marcus Heritage-3 with Middle Frequency Control
Controls: Volume/Tone, Blender, Treble, Middle/Freq, Bass, Pickup Variation SW
Knobs: Aluminum Knob Black
Bridge: Sire Headless Individual Bass Bridge
Tuning Gear: None
Hardware Finish: Black

Dimensions and Weight in Packaging

Mahogany

  • Shipping Weight: 17.5 lbs
  • Shipping Dimensions: 48 x 20 x 7 in
  • Manufacturer Part Number (MPN): SML-5227

For support or warranty questions, please contact the manufacturer:
Phone: 1-213-210-8976
Email: sireguitars@sire-revolution.com

Reviewers gave this product an overall rating of 1 out of 5 stars. (1 ratings)
Submitted August 30, 2026 by Daniel Domain in Waxahachie, TX

"Sadly Disappointed"

Overall: 1 out of 5 stars
(see rating details)
Verified Purchaser zZounds has verified that this reviewer purchased this specific product from us.
This is the third Sire bass that I have purchased. The first was the M7 six string and then the V8 five string. Both are amazing. I sold the M7 to get the M6. And I must say that I am highly disappointed. I played it at one gig a couple days after it arrived and it played fine. A few days after that gig, I picked it up to play it, and cannot get it to stop string buzzing. No matter where I fret it, the strings buzz. I have tried all the tricks, adjusting the string height, adjusting the truss rod. Nothing works. I would NOT recommend this bass. I will be selling it for what I can get for it. Sorry Sire. This one is not up to your standards. Highly disappointed!

Musical Background:

30 years experience. In an original rock band.

Musical Style:

Rock
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Mahogany

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