1. Introduction
This manual provides comprehensive instructions for the setup, operation, and maintenance of your SIRE MARCUS MILLER P8-5 Natural Electric Bass Guitar. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your instrument.
The Sire P8-5 is a 5-string electric bass featuring a Swamp Ash body, a C-shaped Roasted Hard Maple neck with rolled fretboard edges, and Marcus Miller signature electronics and hardware, designed for precise low-end articulation suitable for various musical styles.
2. Product Overview
The MARCUS MILLER P8-5 Natural bass guitar combines classic design with modern playability and versatile electronics. Key components are detailed below.

Figure 2.1: Front view of the SIRE MARCUS MILLER P8-5 Natural bass guitar. Note the natural swamp ash body, white pearloid pickguard, and the five-string configuration.

Figure 2.2: Rear view of the SIRE MARCUS MILLER P8-5 bass guitar, highlighting the natural wood grain, neck plate, and the active electronics compartment.

Figure 2.3: Detailed view of the P/J pickup configuration, bridge, and control layout on the body of the bass. This includes volume, tone, and EQ controls.

Figure 2.4: Close-up of the headstock, displaying the 5 tuning machines and the "Marcus Miller P8" branding.
3. Setup
3.1 Unpacking and Inspection
Carefully remove the bass guitar from its packaging. Inspect the instrument for any signs of damage that may have occurred during shipping. Check the neck, body, hardware, and electronics. If any damage is found, contact your retailer immediately.
3.2 Initial Tuning
Before playing, tune the bass guitar. The standard tuning for a 5-string bass is B-E-A-D-G (from lowest to highest string). Use a reliable electronic tuner for accuracy.
3.3 Battery Installation (for Active Electronics)
The Sire P8-5 features active electronics, which require a 9V battery. The battery compartment is located on the back of the body (refer to Figure 2.2). To install or replace the battery:
- Locate the battery compartment cover on the back of the bass.
- Open the cover.
- Insert a fresh 9V alkaline battery, observing the correct polarity (+/-).
- Close the battery compartment cover securely.
Note: Always unplug your bass when not in use to conserve battery life. A weak battery can result in distorted sound or no sound at all.
4. Operating the Bass Guitar
4.1 Connecting to an Amplifier
Connect one end of a standard instrument cable (1/4-inch jack) to the output jack on your bass guitar and the other end to the input of your bass amplifier or audio interface.
4.2 Control Knobs and Switches
The Sire P8-5 features a versatile control layout designed by Marcus Miller. Familiarize yourself with the functions of each knob and switch:
- Volume Knob: Controls the overall output level of the bass.
- Tone Knob: Adjusts the treble frequencies, allowing you to brighten or darken your sound.
- Pickup Blend Knob: Blends the output between the Precision-style (neck) and Jazz-style (bridge) pickups. Turn towards the neck for more fundamental tone, towards the bridge for more articulation.
- 3-Band EQ (Bass, Mid, Treble): These active controls allow for precise shaping of your tone.
- Active/Passive Switch: Toggles between active (powered by battery, with EQ) and passive (no battery needed, basic volume/tone) modes.
Experiment with different settings to find the sound that best suits your playing style and musical context.
5. Maintenance
5.1 Cleaning
After each use, wipe down the strings and body with a clean, soft, lint-free cloth to remove sweat, oils, and dust. For the body, a guitar-specific polish can be used periodically. Avoid abrasive cleaners or solvents.
5.2 String Replacement
Strings should be replaced regularly, depending on playing frequency and personal preference. Old strings can sound dull and lose intonation. When replacing strings, do so one at a time to maintain neck tension.
5.3 Fretboard Care
The Roasted Hard Maple fretboard should be cleaned periodically. Use a soft cloth to wipe away grime. For deeper cleaning, consult a guitar technician or use specialized fretboard cleaner.
5.4 Storage
Store your bass guitar in a stable environment, away from extreme temperature changes and humidity fluctuations. A gig bag or hard case provides protection from physical damage and environmental factors.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or weak sound | Dead battery (active mode), faulty cable, amplifier off, volume knob down. | Replace 9V battery, check cable connections, turn on amplifier, increase volume. |
| Buzzing or humming noise | Poor grounding, faulty cable, interference from electronics, single-coil hum. | Check grounding, try a different cable, move away from electronic devices, ensure proper shielding. |
| Strings buzzing on frets | Low action, warped neck, worn frets. | Adjust bridge saddle height, adjust truss rod (consult technician), fret leveling (professional service). |
| Difficulty staying in tune | Old strings, improper string winding, faulty tuning machines, nut issues. | Replace strings, ensure proper string winding, lubricate nut, inspect tuning machines. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | MARCUS MILLER P8-5 Natural |
| Model Number | P8 Swamp Ash 5 |
| Body Material | Swamp Ash |
| Body Shape | Sire Precision Bass Type |
| Neck Material | Roasted Hard Maple (Satin Finish) |
| Neck Shape | C-Shape |
| Scale Length | 86.4 cm (34 inches) |
| Fretboard Material | Rolled Edge Roasted Hard Maple |
| Fretboard Radius | 24.1 cm (9.5 inches) |
| Number of Strings | 5 |
| Pickup Configuration | Marcus Miller Signature Electronics (P/J style) |
| Hardware | Marcus Miller Signature Hardware |
| Color | Natural |
| UPC | 810046134184 |
8. Warranty and Support
For warranty information and technical support, please refer to the official SIRE website or contact your authorized SIRE dealer. Keep your proof of purchase for warranty claims.
For general inquiries or further assistance, you may also contact the manufacturer directly. Contact details are typically available on the product packaging or the manufacturer's official website.





