B2 Audio 2 Way 6.5" REF SQ Series Component Passive Crossover

• Audiophile Reference Quality – Experience breathtaking sound with the B2 Audio REFSQ61, engineered for pure sound quality and elite daily setups.
• Premium Construction – Multi-layer carbon fiber 6.5" mid-woofers deliver tight, dynamic midbass, paired with ultra-accurate 1" ceramic dome tweeters.
• Bi-Amp Crossover Design – Includes 2-way passive crossovers for precision tuning and enhanced control; perfect for DSP or passive SQ builds.
• High-End Materials – Features neodymium motors, gold-plated terminals, CNC aluminum baskets, and vented pole pieces for superior efficiency.
• Competition-Ready Performance – Built for competitors and audiophiles seeking unmatched tonal accuracy, imaging, and musical detail.

B2 Audio 2 Way 6.5" REF SQ Series Component Passive Crossover

This Listing Includes:

• (2) 6.5" Carbon Fiber Cone Mid-woofers


• (2) 1" Ceramic Dome Tweeters


• (2) Passive 3-Way Crossovers

Experience breathtaking clarity and full-spectrum precision with the B2 Audio REFSQ61 Reference Series 2-Way Component Set, engineered for competition-level sound quality and elite daily setups.

This refined system combines powerful, musical 6.5" mid-woofers with ultra-responsive 1" ceramic dome tweeters, tuned to deliver a smooth and coherent soundstage with pinpoint imaging. The REFSQ61 is designed for those who demand exceptional realism, low distortion, and linear dynamics in every frequency range.

Built with multi-layer carbon fiber cones, FEA-optimized neodymium motors, and gold-plated CNC aluminum baskets, this set blends stunning aesthetics with uncompromising performance. Whether you’re running a fully passive setup or integrating with a DSP, the REFSQ61 offers flexibility, control, and the unmistakable accuracy of B2 Audio’s Reference Series.

Features

• 6.5" multi-layer carbon fiber cones for strength, control, and musicality


• 1" ceramic dome tweeters for ultra-accurate, delicate high frequencies


• FEA-optimized neodymium motors for precision and efficiency


• Non-conductive TIL voice coil formers for damping control


• Gold-plated top plates, CNC aluminum baskets, and trim rings


• Vented baskets and pole pieces for thermal and acoustic efficiency


• Designed for high-end 2-way SQ systems or DSP-integrated builds

Crossover Configuration

This set includes a 2-way bi-amp crossover, designed to let you run the woofer and tweeter on separate amplifier channels for enhanced control and fine-tuning. Perfect for sound quality (SQ) enthusiasts who want to achieve exceptional imaging and balance.

Use it in a traditional passive configuration or pair with a DSP for active tuning flexibility.

Component Specifications

6.5" Midwoofer:

• Max Power: 100W


• RMS Power: 70W


• Impedance: 4 Ohm


• Voice Coil: 1.4" (35.5 mm)


• Cone: Multi-layer Carbon Fiber


• Magnet: High-Density Ferrite


• Frequency Response: 50 Hz – 10 kHz


• Sensitivity: 87.6 dB


• Unit Weight: 3.74 lbs (1700g)

1" Ceramic Dome Tweeter:

• Max Power: 75W Peak / 25W RMS


• Impedance: 3.0 Ohm


• Voice Coil: 1.0" (25.4 mm)


• Magnet: Internal dual neodymium


• Dome Material: Ceramic


• Frequency Response: fs ~ 20 kHz


• Sensitivity: 86.0 dB


• Unit Weight: 150g

Dimensions:

Mid-woofers

• Mounting Depth: 2.93" (74.5 mm)


• Cutout Diameter: 5.31" (135 mm)


• Overall Diameter: 6.5" (165 mm)

Tweeters

• Mounting Depth: 1.1" (28 mm)


• Cutout Diameter: 1.79" (45.4 mm)


• Overall Diameter: 2.24" (57 mm)

Crossovers:

• Length: 4.75"


• Width: 4.75"


• Height:1.25"