Bose Sub 2 Powered Bass Module Review
By 8mm Audio Experts | Professional Portable PA Subwoofer Review
The Bose Sub 2 Powered Bass Module is designed to deliver deeper bass, higher output, and stronger low-frequency impact for the Bose L1 Pro portable PA systems. Built for performers who require powerful bass reinforcement, the Sub 2 expands the capabilities of the L1 Pro8, L1 Pro16, and L1 Pro32 systems.
With a larger RaceTrack driver, 1,000W Class-D amplification, and extended bass response down to 37Hz, the Sub 2 is engineered for DJs, live bands, and high-energy performances where strong low-end output is essential.
Bose Sub 2 Specifications
- Driver: 10 × 18-inch high-excursion RaceTrack driver
- Amplifier power: 1,000W Class-D
- Frequency response: 37Hz (−3dB)
- Maximum SPL: 123dB continuous / 131dB peak
- Connectivity: SubMatch input/output and balanced line input/output
- Pole mount: M20 threaded insert
- Weight: 23 kg
- Compatibility: Bose L1 Pro8, L1 Pro16, L1 Pro32
- Control: Bose L1 Mix mobile app support
- Stackable: Up to two subwoofers per L1 Pro system
RaceTrack Driver Design
The Bose Sub 2 uses a 10 × 18-inch RaceTrack driver instead of a traditional circular woofer. This elongated design provides the same surface area as a conventional 15-inch subwoofer while allowing the cabinet to remain slim and portable.
The larger diaphragm area moves more air, which improves bass depth and overall acoustic output without requiring a much larger enclosure.
1,000W Class-D Amplifier Performance
The integrated 1,000W Class-D amplifier provides substantial headroom for high-energy performances. Class-D amplification allows the system to deliver powerful output while maintaining efficient thermal performance and lower overall weight.
This level of amplification ensures consistent bass reproduction during extended events such as live concerts, DJ sets, and wedding receptions.
SubMatch Single-Cable Integration
The Sub 2 integrates directly with the L1 Pro32 system through Bose’s SubMatch connection.
This connection carries both audio and power through a single cable, simplifying setup and reducing cable clutter.
When connected via SubMatch:
- The system automatically configures crossover settings
- The subwoofer receives power from the L1 Pro32
- No separate power outlet is required for the subwoofer
Cardioid Mode
When two Sub 2 modules are stacked together, the system can activate Cardioid Mode.
This configuration places one subwoofer facing forward and the second facing backward. Digital processing reduces bass energy behind the stage while directing low frequencies toward the audience.
This improves sound control on stage and helps reduce microphone feedback.
Performance and Applications
DJ and Electronic Music
The Sub 2 is designed for bass-heavy music such as EDM, hip-hop, and electronic dance music. Its deeper 37Hz bass extension and higher SPL output provide the low-frequency impact required for dance floors and club environments.
Live Bands
For bands performing with drums, bass guitar, and keyboards, the Sub 2 adds the low-frequency reinforcement needed to support the full mix in medium to large venues.
Large Event Venues
With high SPL capability, the Sub 2 can comfortably support events with larger audiences when paired with an L1 Pro system.
Two-Subwoofer Configuration
Using two Sub 2 modules significantly increases system output. Stacking two units can provide roughly a 6dB increase in maximum SPL while enabling Cardioid Mode for directional bass control.
This configuration is commonly used for large events, outdoor performances, and high-energy DJ shows.
L1 Mix App Control
The Bose L1 Mix mobile app allows performers to adjust the PA system wirelessly from anywhere in the venue.
The app allows control of:
- Subwoofer level
- Channel EQ
- Volume levels
- Reverb settings
This enables quick sound adjustments during performances without needing to return to the main mixer.
Pros and Cons
Pros
- Powerful 1,000W amplification
- Deep bass extension down to 37Hz
- RaceTrack driver delivers strong output in a compact cabinet
- Simple single-cable SubMatch setup with L1 Pro32
- Supports Cardioid Mode when two units are used
Cons
- Heavier than the Sub 1 module
- Higher price compared with smaller PA subwoofers
- May be excessive for small acoustic performances
Final Verdict
The Bose Sub 2 is designed for performers who require powerful low-frequency performance in portable PA systems. Its larger RaceTrack driver, stronger amplification, and deeper bass extension make it an excellent choice for DJs, live bands, and high-energy events.
When paired with the L1 Pro systems, the Sub 2 transforms the portable line array into a full-range PA solution capable of delivering strong bass performance for larger audiences.
