Aeternus Lux 2.2 Modular System
Design and Construction:
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:
Enigma 44 – 2.5 Way Transmission Line System
Design and Constructed By:
Kevin Shawbitz
Design Goals
- Accurate response
- Utilize a transmission line
- Excellent bass extension
- Be pleasant to listen to
- Costs $950 including stands
- Work in a variety of rooms
Key Features
- Large size (LxWxH= 8.25″x18″x38.25″)
- F3 of 44 Hz when near a wall
- ±2dB response
- Clean, articulate bass
- Costs $950
Drivers
- SEAS Prestige CA15RLY (H1216) 5.5″ Coated Paper Cone Woofer
- ScanSpeak Discovery D2608/9130 1″ Textile Dome HDS Tweeter
Frequency Response
Impulse Response
PA 2201 Midfields
Design By:
Thomas Conran
Key Features
- Medium size (LxWxH= 27″x9″x15″)
- F3 of 56Hz
- +/- 2dB response
- Tight, accurate sound
Drivers
- SB Acoustics SB23NRXS45-8 woofer
- Tang Band 75-1558SE midrange
- Fountek NeoCD 2.0
Frequency Response
Intergrated Frequency Response
Design Statment for PA 2201 Midfields
Griff ’91
Design and Constructed By:
Collin Doerr-Newton
Design Goals
- Portability
- Accurate response
- Good bass extension
- Be pleasant to listen to
- Under $700
Key Features
- Medium size (LxWxH= 16″x12″x20″)
- F3 of about 50Hz
- +/- 2dB response
- Big open sound
- Well under $700
Drivers
- SBAcoustics SB17NRXC35-8 woofer
- Vifa XT25TG30-04 tweeter
Chosen Testing Results
Integrated Frequency Response
Red- Overall Response, Purple- Woofer Response,
Green- Tweeter Response
Horizontal Off-Axis Response
Red- 0 degrees, Yellow- 15 degrees, Purple- 30 degrees, Red (2)- 45 degrees, Green- 60 degrees
Documentation
The Krakens – 3-Way Sealed System
Designed by Renata Putzig
Design Goals
- Large Soundfield
- Low fatigue
- Accurate transients
- For casual listening and movies
- Aesthetically pleasing
Key Features
- +/-2 dB from 70Hz to 20 kHz
- F3 of 50Hz
- Solid cherry
- Sealed box
- Ribbon tweeter
- 14 3/4″ x 24 3/4″ x 21 3/4″
- Cost: ~$1000
Drivers
- SB Acoustics SB23NRXS45 8″
- Seas Prestige MCA12RC H1304 4.5″
- Fountek NeoX 2.0 Ribbon Tweeter
Euphony Blues
Design and Construction by Lindsey L. Johns.
Design Goals:
- Accurate frequency response: at least +/- 3 dB, preferably +/- 1.5 dB, low distortion
- Accurate bass response down to at least 60 dB
- Smallest possible size for shelf or desk placement
- Sturdy and unique-looking cabinet
- Budget under $600
Results:
- +/- 1.5 dB between 55 Hz and 18 kHz, less than 1% harmonic distortion over 50 Hz
- f3 of 50 Hz
- Dimensions: 14″ wide, 19″ tall, 14″ deep
- Very sturdy cabinet with custom glossy indigo finish
- Cost roughly $500
Drivers:
Dayton Audio RS225-8 8” Aluminum Reference Woofer
Dayton Audio RS28F-4 1-1/8” Silk Dome Tweeter
Testing Results:
Documentation:
Design Statement and Tuning Report
(Note: Some documents labeled by the previous working title, “Baby Blues”)
Raving Behemoths
Designed, Built, and Tested by Nathan Hunter
Design Goals
- High Output
- improved Horizontal Off-Axis Response
- Low Frequency Extension with ƒ3 ≈ 50 Hz
- Voicing to include Bass Boost
- Low cost comparing to PA Speakers with similar capabilities
Features and Components
- Diamond Shape with Rugged Exterior
- Floor Mounting
- Active Digital Crossover PCS 2.400
- Selenium Pro D220Ti Horn Driver
- Selenium Pro HC23-25 Exponential Waveguide
- 2x Dayton Audio PA301-8 12″ Woofers
- Carvin Cabinet Handles for easier mobility
Weight Vs. Similar Products
- Raving Behemoths ≈ 150 lbs
- JBL PRX612M = 34.5 lbs
- QSC KW122 = 49 lbs
Cost Vs. Similar Products
- Raving Behemoths ≈ $1300
- JBL PRX612M List Price = $1299
- QSC KW122 List Price = $1399
Testing Results
Documentation
