B² Audio REF SQ63

Experience breathtaking clarity and precision across the entire sound spectrum with the B2 Audio REFSQ63 Reference Series 3-way component system, a premium sound solution designed for competition-level quality and everyday use at the highest level.

This system combines powerful, full-sounding 6.5-inch woofers with ultra-clear 3-inch midrange drivers and ultra-responsive 1-inch ceramic dome tweeters. Each element has been engineered for maximum resolution, low distortion and linear dynamics, so your audio system reproduces every nuance with detail and precision.

From the precise control of the midrange to the nuanced reproduction of the full vocal range to the shimmering finesse of the treble, the REFSQ63 delivers a coherent and immersive soundstage worthy of the Reference label.

Multi-layer carbon diaphragm
Both the midrange and bass/midrange drivers use a stiff, lightweight carbon construction for clean, controlled reproduction and powerful output with minimal distortion.

1" Ceramic dome tweeter
Delivers incredibly accurate and fine high-frequency detail with a CCAW voice coil, dual neodymium magnets and a vented aluminum enclosure for low distortion and heat dissipation.

3" full-range midrange driver with CNC gold plating
FEA-optimizedneodymium motor with precision-matched copper cap and gold-plated CNC yoke and top plate provide low compression, rich vocals and smooth upper mids.

High-efficiency, low-compression design
Vented die-cast aluminum baskets, copper shorting rings and non-conductive voice coil former maximize airflow, heat dissipation and sound clarity at high volumes.

Power specifications
6.5" Midrange: 100W Max / 70W RMS
3" Full range driver: 100W Max / 30W RMS
1" Tweeter: 75W Max / 25W RMS
Nominal impedance: 4Ω (woofer & midrange), 3Ω (tweeter)


Features
✓ 6.5" and 3" multi-layer carbon fiber cones for stability, control and musicality
✓ 1" ceramic dome tweeter for extremely precise and sensitive high frequencies
✓ FEA-optimized neodymium magnets for tweeter and midrange
✓ Non-conductive TIL voice coil former for damping control
✓ CCAW and copper voice coils to reduce moving mass
✓ Gold-plated top plates, CNC-machined aluminum baskets and trim rings
✓ Vented baskets and pole pieces for thermal and acoustic efficiency
✓ Perfect for active or passive 3-way soundtrack systems

Crossover configuration explained:
This set includes a 2-way bi-amping crossover that allows you to drive woofers and tweeters on separate amplifier channels. This configuration is particularly popular with sound enthusiasts who want maximum control and fine-tuning in their system.

While a true tri-amping crossover would require a 6-channel amplifier with identical circuitry (adding complexity and cost), this crossover offers more flexibility. It can be operated as a 2-way system (woofer + tweeter per side), while the included 3-inch full-range driver can be actively driven with your DSP or amplifier.

This allows you to create a passive/active hybrid system with just one 4-channel amplifier or run a fully active system with a DSP for maximum control. The design gives you the freedom to choose between the convenience of traditional passive systems and advanced active configurations - without having to commit to a single option.

Component specifications:

6.5" bass-midrange driver
Maximum power handling: 100 W
RMS power handling: 70 W
Nominal impedance: 4 Ohm
Voice coil diameter: 1.4" / 35.5 mm
Cone material: Multi-layer carbon fiber
Magnet: High-density ferrite
Frequency response: 50 Hz - 10 kHz
Sensitivity (1 W/1 m): 87.6 dB
Mounting depth: 2.93" / 74.5 mm
Cut-out diameter: 5.31 inches / 135 mm
Overall diameter: 6.5" / 165 mm
Unit weight: 3.74 lbs / 1700 g


3" midrange driver
Maximum power handling: 100 W
RMS power handling: 30 W
Nominal impedance: 4 Ohm
DC resistance: 3.35 Ohm
Voice coil diameter: 1.2" / 30.5 mm
Voice coil former: TIL (non-conductive)
Voice coil wire: copper
Magnet: Neodymium, FEA-optimized with copper cap
Cone material: Multi-layer carbon fibre
Basket: Vented die-cast aluminium basket
Frequency response (-3 dB): 200 Hz - 20.000 Hz
Sensitivity (1 W/1 m): 88.0 dB
Mounting depth: 1.52" / 38.6 mm
Cut-out diameter: 3.02" / 76.8 mm
Overall diameter: 3.62 inch / 92 mm
Unit weight: 450 g

Tweeter:
Maximum power handling: 75 W peak / 25 W RMS
Nominal impedance: 3.0 Ohm
DC resistance: 2.3 Ohm
Voice coil diameter: 1.0" / 25.4 mm
Voice coil former: Polyimide
Voice coil wire: CCAW
Cooling: Vented + copper wire
Magnetic structure: Internal double neodymium magnet
Dome material: Ceramic
Surround: VC-connected only - no interaction with dome
Housing: CNC-machined aluminum for low resonance and optimum heat dissipation
Frequency response (-6 dB): fs ~ 20.000 Hz
Sensitivity (1 W/1 m): 86.0 dB
Installation depth: 1.1" / 28 mm
Cut-out diameter: 1.79" / 45.4 mm
Overall diameter: 2.24 inch / 57 mm
Unit weight: 150 g

This offer includes:
(2) 6.5" woofers
(2) 3" midrange drivers
(2) 1" ceramic dome tweeters
(2) Passive 2-way crossovers