TW-84 Home Entertainment Speakers

Design Goals

• Pleasurable
• Fairly Flat Frequency Response
• Passive Crossover
• Ported Enclosure For Increased Low End
• Pair With External Subwoofer
• Sound Good Alone As Well

Key Features 

• WxDxH = 1′ x 1′ 3/8″ x 3′ 9 1/2″
• +/- 2dB from 40-20,000Hz
• 2 Way Design
• F3 of 37 Hz

Drivers

• Scanspeak D2604/32000
• Dayton Audio RS225

 

Frequency Response

Documentation: 

Design & Final Testing Report

Glossy

AJJ 994’s 3-Way Floorstanding Passive System

Designed by: Andrew ‘AJ’ Diehl

Design Goals:

• Sealed enclosure for tight response
• Passive because it’s awesome
• Tight bass
• Accurate reproduction of sound for crucial listening

 

Key Features:

• F3 of 39 Hz
• +/- 3 dB from 90 Hz to 22 kHz
• 3^rd Order Crossover at 2 kHz and 130 Hz
• Additional 3^rd Order Crossover at 300 Hz on Subwoofer
• Optional 45 Hz Notch Filter on Subwoofer to control nasty resonance
• Artist from Chicago will be painting both speakers in abstract form

 

Drivers:

• Tweeter:
  SB Acoustics SB29RDC-C000-4 Ring Dome Tweeter
• Mid-Woofer:
  SB Acoustics SB15NRXC30-4 5″ Woofer
• Subwoofer:
  SB Acoustics SB34NRX75-6 12″ Woofer

Side note on responses: notch filter is included in final results.

Download Glossy: AJJ 994 Speaker Glossy
Download Report: AJJ-994 Transducer Report

Aeternus Lux 2.2 Modular System

Design and Construction:

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Paul Kirby

Design Goals

• Portable
• Low Fatigue
• Low bass extension
• Modular
• Good horizontal Off-axis
• Eventual use in 5.1 system

Key Features 

• Large Size WxDxH = 9″x1’2″x4’10”
• +/- 1.5dB from 75-20,000Hz
• MTM Design
• Inset tweeter for minimal distance between woofers, hence minimal vertical lobbing
• Side-firing subwoofer modules (f3 of 25Hz)
• Removable main with f3 of 70Hz
• +/- 1.5dB from 75-20,000Hz
• Active to passive cascaded crossover for module implementation

Drivers

• Morel MDT30S-4 1″ Textile Dome Tweeter
• SEAS Prestige L15RLY/P (H1141) 5.5″ Aluminum Cone Woofers
• SB Acoustics SB29SWNRK-S75 10″ Subwoofer

Main Response (green is port measurement)

Sub Response

Impulse Response

Documentation: 

Design Report and Final Testing

Aeternus Lux Drafting

Glossy