SKU: 95038751042

B2 Audio 6.5" REF SQ 3-Way Component Speaker System w/Crossover

Sale price$359.98 Regular price$399.98
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Description

B2 Audio 6.5" REF SQ 3-Way Component Speaker System w/CrossoverCOMPLETE REFERENCE PACKAGE: Includes woofers, mids, tweeters, and premium passive crossover networks for a full front stage solution AUDIOPHILE SOUND QUALITY: Delivers exceptional imaging, tonal balance, and detail across the full frequency spectrum PREMIUM CROSSOVER NETWORKS: REF3WBX passive crossovers properly distribute frequencies while allowing tweeter tuning adjustment HIGH END MATERIALS THROUGHOUT: Carbon fiber cones, ceramic dome tweeters, CNC

  • COMPLETE REFERENCE PACKAGE: Includes woofers, mids, tweeters, and premium passive crossover networks for a full front-stage solution
  • AUDIOPHILE SOUND QUALITY: Delivers exceptional imaging, tonal balance, and detail across the full frequency spectrum
  • PREMIUM CROSSOVER NETWORKS: REF3WBX passive crossovers properly distribute frequencies while allowing tweeter tuning adjustment
  • HIGH-END MATERIALS THROUGHOUT: Carbon fiber cones, ceramic dome tweeters, CNC aluminum housings, and oversized crossover components
  • SHOW BUILD READY: Transparent crossover covers and exposed copper coils create an ultra-premium installation appearance
  • BUILT FOR SQL & SQ SYSTEMS: Perfect for reference-level daily drivers, DSP systems, and competition-inspired builds


B2 Audio 3-Way 6.5" REF SQ Car Audio Component Speaker System w/ 3-way Crossover


This Listing Includes:



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

  • (2) 3" Carbon Fiber Full-Range Midrange Speakers

  • (2) 1" Ceramic Dome Tweeters

  • (2) B2 Audio REF3WBX 3-Way Passive Crossovers


Step into true reference-grade sound with the B2 Audio REFSQ63 + REF3WBX Complete 3-Way Component Speaker Package. Designed for elite sound quality builds and audiophile-level performance, this complete front-stage solution combines the incredible detail and realism of the REFSQ63 Reference Series speaker system with the precision tuning and premium signal management of the REF3WBX passive crossovers.


This is not your average component set. Every element of this package is engineered for accuracy, staging, tonal balance, and emotional impact. From the deep, controlled midbass response of the 6.5" carbon fiber woofers, to the rich vocal presence of the 3" full-range mids, all the way to the crisp shimmer of the ceramic dome tweeters, the REFSQ63 delivers breathtaking clarity across the entire frequency spectrum.


Paired with the stunning REF3WBX passive crossover networks, this system gains smooth frequency distribution, refined transition points, and adjustable tweeter attenuation for dialed-in tuning flexibility. The exposed crossover architecture featuring oversized copper coils and acrylic covers adds pure “show build†energy while maintaining audiophile-grade performance.


Whether you’re building a high-end SQL daily driver, a competition-ready sound quality car, or a clean European-inspired install, this package delivers the detail, dynamics, and realism expected from B2 Audio’s Reference Series.


Features



  • Complete 3-way reference component speaker system

  • Includes matching REF3WBX passive crossover pair

  • Multi-layer carbon fiber woofer and midrange cones

  • 1" ceramic dome tweeters for exceptional detail

  • Adjustable tweeter attenuation on crossover networks

  • CNC-machined aluminum speaker components

  • FEA-optimized neodymium motor structures

  • Premium exposed crossover design with acrylic covers

  • Designed for elite SQ and audiophile-grade installations

  • Excellent for DSP-integrated or passive crossover systems


Component Specifications:


6.5" Midwoofer:



  • Max Power Handling: 100W

  • RMS Power Handling: 70W

  • Nominal Impedance: 4 Ohms

  • 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 (1W/1M): 87.6 dB

  • Mounting Depth: 2.93" / 74.5 mm

  • Cutout Diameter: 5.31" / 135 mm

  • Overall Diameter: 6.5" / 165 mm

  • Unit Weight: 3.74 lbs / 1700g


3" Mid-Range:



  • Max Power Handling: 100W

  • RMS Power Handling: 30W

  • Nominal Impedance: 4 Ohms

  • 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 Fiber

  • Basket: Vented Die-Cast Aluminum

  • Frequency Response (-3dB): 200 Hz - 20,000 Hz

  • Sensitivity (1W/1M): 88.0 dB

  • Mounting Depth: 1.52" / 38.6 mm

  • Cutout Diameter: 3.02" / 76.8 mm

  • Overall Diameter: 3.62" / 92 mm

  • Unit Weight: 450g


T/S Parameters:



  • Fs: 131.8 Hz

  • Qms: 5.575

  • Qes: 0.379

  • Qts: 0.355

  • BL: 5.392 T-M

  • Mms: 3.97 g

  • Cms: 0.367 mm/N

  • Vas: 0.475 L

  • Sd: 30.19 cm

  • Le: 0.151 mH

  • Zo Max Impedance: 52.653 Ohm

  • Zmin: 3.974 Ohm

  • Reference Efficiency: 0.278%


1" Ceramic Dome Tweeter



  • Max Power Handling: 75W Peak / 25W 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 conduction

  • Magnet Structure: Internal dual neodymium

  • Dome Material: Ceramic

  • Surround: VC-connected only - no dome interaction

  • Housing: CNC Aluminum for low resonance and thermal control

  • Frequency Response (-6dB): fs ~ 20,000 Hz

  • Sensitivity (1W/1M): 86.0 dB

  • Mounting Depth: 1.1" / 28 mm

  • Cutout Diameter: 1.79" / 45.4 mm

  • Overall Diameter: 2.24" / 57 mm

  • Unit Weight: 150g


T/S Parameters:



  • Fs: 553.9 Hz

  • Qms: 3.359

  • Qes: 0.893

  • Qts: 0.705

  • BL: 2.691 T-M

  • Mms: 0.808 g

  • Cms: 0.102 mm/N

  • Vas: 9.386 mL

  • Le: 0.040 mH

  • Zo Max Impedance: 10.955 Ohm

  • Zmin: 2.903 Ohm

  • Reference Efficiency: 0.173%


Crossover Specifications:



  • Model: B2-REF3WBX

  • Type: 3-Way Passive Crossover

  • Configuration: Woofer / Midrange / Tweeter

  • Tweeter Level Adjustment: Yes

  • Connection Type: Screw Terminal

  • Protective Cover: Clear Acrylic

  • Quantity: Pair

  • Application: Car Audio Component Systems


Crossover Dimensions:



  • Length: 5.5"

  • Width: 3.7"

  • Depth: 1.6"

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 95038751042

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MARIA
Chelsea, US
★★★★★ 5
Sturdy, well built has wheels that makes it easy to move and also lock in place.
Size: 100LBS
Happy with my purchase. Sturdy well built, love that it has wheels makes it easy to move around and wheels lock in place. I choose to fill it with sand and water as it gets really windy where we live this will prevent my umbrella flying to the neighbors house again 😅
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Reviewed in the United States on June 19, 2025
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Verified Purchase
NMS Johnson
Grantham, US
★★★★★ 1
Must Read before Purchasing!!!! Height is lost if you use this base!!!!
Size: 100LBS
I was so very excited about this for our umbrella - and then I put it together. I called my adult son to come and take a look - I had to be doing something wrong. To our dismay, I was not. The lowest pole in the umbrella system has 4 welded pieces with holes meant to connect to the legs, thus stabilizing the structure. The lowest pole measures (guestimate) 3 feet. When you choose this system, you do not use the original cross-bars, nor the original lowest pole with the 4 welded pieces. Rather, you use a newly provided lowest piece roughly measuring a foot. In doing so, the structure loses a total of almost 2 feet. For average-height individuals, this would not be a problem. For individuals 6' or greater, this is quite a problem. My son is 6'6. My husband is 6'2. I really wanted the portability of the product. However, we will be returning it for the kind that rest on the cross-bars. I wish someone had mentioned this in the reviews I read and saved me the trouble.
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Reviewed in the United States on August 7, 2025
S
Verified Purchase
Sock_Bunny
Grantham, US
★★★★★ 5
Makes moving your umbrella around a breeze.
Size: 100LBS
This is best idea in umbrella stands. Decent price. I love that the water intake/release is on the side. Many are on top of the stand. Doesn't leak. Easy to move around and easy to put together with the included tools. I have 2. One for a very heavy 10 x 6' umbrella, and the other for a very light 1/2 round umbrella. Works equally well for both. One tricky part the instructions don't include is that is parts F and J are 'in place' in the base and you need to remove them to re attach them to the cylinder, or what they refer to as the "stand pole". So, if you are looking for parts (and I did this twice), just remember you will find them on the underside of large plastic umbrella base. Both are black, and so not immediately apparent. Love that there are two locking wheels and they include an extra screw. IKEA could learn a few things here.
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Reviewed in the United States on August 6, 2025
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Karl monroe
Pawtucket, US
★★★★★ 5
This product will fit your every need!!!
Size: 100LBS
Very sturdy, Easy assembly, appealing look and easy to move around. very satisfied with this Product!!!
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Reviewed in the United States on November 18, 2025
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Julie A. Loftus
San Leandro, US
★★★★★ 5
Hold my umbrella & watch this!
Size: 100LBS, Size: 100LBS
This product does a fantastic job of keeping our umbrella perfectly vertical. We previously had an all metal one which cost over $100 and fell over all of the time. I love the fact that it can be filled with sand and water to ensure it does flip over! We opted to just use water and it is performing flawlessly! The wheels make it easy to move or they can be locked in place. The assembly was very straightforward and took about 20 minutes. I would buy another one if we need it for our second umbrella.
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Reviewed in the United States on June 22, 2025

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