B1 vs Stadium III
The Stadium III's low-frequency extension is 16 Hz against the B1's 13 Hz, its woofer 10" against 12", and its crossover 24 Hz against 22 Hz. Both share ways (1).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersSubwoofersPowered LoudspeakersDiscontinued
Estimated price (community-sourced)
$650
Around — community and catalog average, updates slowly
About the B1
The REL Acoustics Britannia Series B1 subwoofer stands out for its exceptional speed, authority, and musicality despite its large 12-inch driver. It delivers powerful, visceral bass with precise transient response and low-end extension to 13Hz in-room at -6dB, ideal for high-end audio systems. Featuring a unique Acoustic Resistive Matrix (ARM) loaded enclosure with a 4.75-inch port, it uses a 500W DC-coupled MOSFET Class A/B amplifier. Connectivity includes high-level Neutrik Speakon, RCA, and XLR inputs with flexible gain options. Voiced for greater weight in the bottom register, it reproduces the air shudder of real bass instruments while retrieving subtle hall reverb. This flagship model from the Britannia series (early 2000s) is no longer manufactured.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Impedance
- 100Ω
- Frequency Response
- 13 Hz - 95 kHz
- Power Handling
- 500W
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- AB
- Input Impedance
- 100000Ω
Speaker Design
Driver configuration and enclosure design
- Configuration
- 1-way
- Driver Type
- dynamic
- Driver Size
- 12"
- Driver Count
- 1
- Crossover Frequency
- 22 Hz
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 388 × 674 × 470 mm (W × H × D)
- Weight
- 44 kg (97 lbs)
- Available Colors
- Light Maple, Cherry, Black, Grittex
Key Specifications
Impedance: 100Ω
Frequency: 13-95000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions