Speaker System No.3316 DIY Plan Set

By purchasing these plans you will automatically receive by email the required PDF drawings to construct Speaker System No.3316.

Includes 

• PDF Assembly Drawings 
  • Upper and lower cabinet
  • Support column holding upper cabinet 
• Passive Crossover Schematic 
  • Suggested inductor part numbers from Solen 
  • Suggested capacitor part numbers 
  • Suggested crossover board layout drawing 
• Technical support 
  • Contact josep_crowe@josephcrowe.com

Specification 

Speaker System No.3316 has been optimized for enthusiasts looking for excellent coherency and intelligibility for home theater applications along with high output SPL capability. The drivers are chosen for their specific parameters and they just happen to be affordable! 

• 98dB Sensitivity (1w) 
• 4 ohm nominal impedance 
• 34Hz Bass Extension (-6dB Downpoint) 
• 2.5-Way 
• 300Hz Crossover Point 
• Sealed bass cabinet design using SB Audience 15OB350 Woofers
• Front horn loaded planar transducer for high frequency (PT6825)

Difficulty Level 

Requires the use of standard woodworking tools and soldering skills. The plans require reading technical drawings. Below is an example of a drawing for a piece of the horn.

Click to enlarge below. 

Key Sound Character 

• Smooth and dynamic (even at high SPL)
• Speech intelligibility for movies 
• Controlled coverage for more direct sound (less reflected sound in the room)
  • Ideal for live rooms (no acoustic treatment)
• Tight and controlled bass 

Features 

• Dual 15" bass cabinets (sealed)
  • For technical deep dive video on this cabinet click here. 
  • Rear mounted driver for clean appearance 
  • Triangle enclosure for reduced internal standing waves 
  • Does not require corner placement (can be positioned for proper imaging)
  • Can be placed against front wall (we suggest 12"-24" from front wall) 
  • Can be configured without upper bass cabinet 
  • Removable bottom cover to access driver and crossover 
  • 18mm baltic birch plywood 
  • Radius on cabinet edges (optional)
• Sabourin Front Horn (300Hz Lower Frequency Cutoff) 
  • Uses GRS Planar Tweeter 
  • Horn loaded planar tweeter for very wide bandwidth (300Hz-20kHz)
  • Point source sound (sound from one source)
  • Optimal listening height (95cm)
  • Dipole sound radiation (vented rear chamber) for added soundstage spaciousness 
  • Constructed from 18mm plywood using compound cutting angles (no CNC required) 
  • Uses exponential horn flare in three segments for great high frequency loading (does not use constant directivity flare geometry) 
• Passive Crossover included in plans 
  
  • Drawing of physical dimensions of crossover including location of inductors
  • Air core inductors for critical areas 
  • Iron core used where appropriate 
  • 2.5 Way configuration 
    • Lower cabinet 300Hz crossover point to Sabourin Horn 
    • Upper cabinet 120Hz low pass filter (Acts more as a subwoofer) 
  • Can be configured as tri-amp 
  • Upper Cabinet Optional in plan set 
    • Can be configured with lower bass cabinet only 
    • Simply omit upper cabinet and crossover 

Click below to enlarge