Spec Sheet
Martin 000-28 Acoustic
Tone Profile
"Resonant bloom, sparkling rosewood chime, active Tru-Mic blending."
Instrument Identity
Guitar Model
2025 Martin 000-28 Acoustic
Finish
Natural (Solid Sitka Spruce Top, Solid East Indian Rosewood Back/Sides)
Factory Setup
Tuning Default
E Standard (E-A-D-G-B-E)
String Gauge
Phosphor Bronze .012 - .054
Electronics & Pickups
Configuration
Active Microphone + Piezo Hybrid System
Pickup System
L.R. Baggs Anthem (Tru-Mic internal microphone + Element under-saddle piezo)
Output Profile
Medium Output (Buffered by active onboard preamp)
Onboard Controls
Soundhole Control Module
• Volume Control: Master output level adjustment.
• Mix Control: Blends between the Element under-saddle piezo and the Tru-Mic internal microphone (up to 250Hz crossover).
• Phase Inversion Switch: Minimizes live stage low-frequency feedback loop risk.
• Battery Check: Direct LED battery status indicator.
• Mix Control: Blends between the Element under-saddle piezo and the Tru-Mic internal microphone (up to 250Hz crossover).
• Phase Inversion Switch: Minimizes live stage low-frequency feedback loop risk.
• Battery Check: Direct LED battery status indicator.
Input Stage Requirements
First Enabled
Input Z (Impedance)
+1.0 dB
Gain Stage Offset
Active onboard preamp acts as a buffer, meaning input impedance does not load down the guitar signal. A minor gain staging offset is applied to preserve maximum rosewood headroom.
Preset EQ Frequency Cuts
100 Hz
Low-Cut Target
12.0 kHz
High-Cut Target
Cab or IR block roll-off targets. rolloff rolls out low-frequency cabinet rumble and tames sub-bass resonance, while allowing high-end woodiness to shimmer.