Archive for the ‘Bass Reflex’ Category

Gust Op. 1

April 27, 2018 Leave a comment


Gust Op.1

Designed by Jacob Gust

Design Goals:

  • Active Home Theater Loudspeakers
  • Warm & Unique Sound
  • Extended Low Range
  • Even Off Axis Listening
  • Pleasing To Look At


  • Ribbon Tweeter, 5″ Mid, & 8″ Woofer
  • Passive 3kHz Crossover between Tweeter & Mid
  • Dual Internal Volume Design with Crossover Cubby
  • Matching Custom Speaker Stands
  • F3 of 30Hz
  • +/- 3dB from 30Hz-20kHz

Frequency Response:

Gust Freq

Integrated Frequency Response:

Gust Integrated Freq

Off-Axis Response:

Gust Off Axis.png

Harmonic Distortion:

Gust Harmonic.png

Gust Op. 1 Glossy

Gust Op. 1 Technical Binder


MC8R Studio Reference Monitors


IMG_0469Designed by Michael Chopp

Design Goals:

  • Portable music mixing monitors for professional use
  • Flat frequency response full range
  • $1000 budget
  • Natural wood look – visually appealing

Key Specifications:

  • Drivers
    • Fountek Neo X 2.0 Ribbon Tweeter
    • Fountek 8″ FW200 Midwoofer
  • F3 of 40Hz – Vented Enclosure
    • 2″ port on front baffle
  • +/- 1.5dB from 50Hz – 20kHz
  • 0.1% THD from 50Hz – 20kHz
  • Dimensions: 13″ x 22″ x 17″ (w, h, d)
  • MiniDSP active crossover
    • Tweeter at 1.8kHz
    • Woofer at 2.2kHz
  • Baltic birch exterior, MDF interior

Frequency Response:

Screen Shot 2018-04-26 at 12.11.46 PM

Integrated Frequency Response:

Screen Shot 2018-04-26 at 12.11.31 PM

Off Axis Response:

Screen Shot 2018-04-26 at 12.20.03 PM

Harmonic Distortion:

Screen Shot 2018-04-26 at 12.19.47 PM

MC8R Design Binder

MC8R Speaker Glossy



NC-17 Reference Monitors

April 28, 2017 Leave a comment


Designed by Nick Cecconi

Design Goals:

  • Mixing monitors for home
  • Inspired by C-17 airplane
  • Flat frequency response
  • Budget: $1000

Key Features:

  • F3 of 56 Hz
  • Vented enclosure
  • Battleship gray finish
  • Dimensions: 12” x 15” x 17”
  • +/- 1 dB from 56 Hz to 18 kHz
  • MiniDSP 2-way crossover @ 1.8 kHz
  • 1/2″ Maple w/veneer core, 1/2″ MDF


  • SB Acoustics SB26STAC 1″ Textile Dome Tweeter
  • SB Acoustics SB23NACS 8″ Aluminum Cone Woofer

Frequency Response:


Integrated Frequency Response:

Integrated Frequency Response.png

NC-17 Research Paper

NC-17 Speaker Glossy

Not Your Grandpa’s Speakers


Designed by: Mike Schmitz

Design Goals

  • Casual listening
  • Large and noticeable
  •  Unique aesthetics
  • Passive

Key Features

  • F3 of 26 Hz
  • +/- 6 dB 26 Hz to 18 kHz
  • 2nd Order Crossover at 250 Hz, 4th Order Crossover at 2.5 kHz
  • Wide Dispersion
  • Cost less than $1200
  • Ported design
  • 3/4 in. MDF and 1/2 in. Baltic Burch construction with Maple trim.

Tweeter – Fountek Neo X 2.0 Ribbon
Midrange – SB Acoustics SB15MFC30-4
Woofer – SB Acoustics SB29NRX75-6

Frequency Response
Integrated Frequency Response
Not Your Grandpa’s Speakers Glossy
Not Your Grandpa’s Speakers Research Paper

TW-84 Home Entertainment Speakers

April 29, 2016 Leave a comment

TW-84 Pic

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


  • Scanspeak D2604/32000
  • Dayton Audio RS225


Frequency Response



Design & Final Testing Report


DG01 Near-Field Multipurpose Monitors

April 29, 2016 Leave a comment

DG01 Wireframe

The DG01 speakers are multipurpose mixing and listening speakers designed for near-field use. Despite their size, these desktop speakers were made to be listened to from a distance of only about a foot away.
To achieve the low end necessary for critical listening, the DG01s are designed as a ported box with a 2” port on the rear side. While this causes some loss of transient accuracy, it is more than made up for by the low-frequency extension. These speakers manage to reach an F3 of 38Hz while also boasting a +/- 3dB range from ~40Hz-19kHz. The range is possible due to the excellent drivers selected for the job—Dayton Audio RS225-8 for the woofers and SB Acoustics SB26STAC-C000-4 for the tweeters. With the use of a MiniDSP PWR-ICE125 amplifier and DSP unit for each monitor, a fairly flat response is easily achieved. With the design comes a very strong center image and a large sound stage.

Crossover: 4th-order, woofer at 2.2kHz, tweeter at 2kHz
Response: +/-3dB ~40Hz-19kHz
F3: 38Hz
Total cost (w/o MiniDSP): ~$400
Box materials: 1/2” MDF with 3/4” birch plywood
Size: 19”Hx15”Wx18”D
Tweeter: SB Acoustics SB26STAC-C000-4
Woofer: Dayton Audio RS225-8

DG01 Frequency Response

DG01 Speaker Glossy

DG01 Speaker Research & Design




  • Low frequency extension, down to 40Hz
  • Flat frequency response.
  • Budget of around $1000
  • Portability


  • 2-way system.
  • MiniDSP Active Crossovers
  • Vented cabinet for low frequency extension.
  • Flat response curve
  • +/1.25 from 100Hz to 15kHz
  • F3 at 36Hz


  • 1/2” 9-ply baltic birch exterior
  • 1/2″ MDF interior.
  • 1” Acrylic around woofers
  • Black Plastidip coating
  • 1.4 cubic feet interior


  • Dayton Audio RS225-8 8” Reference Woofer
  • SB Acoustics SB29-RDC-C000-4 1” Ring Dome Tweeter




Subfusc Design Process, Construction, and Documentation

Subfusc Speaker Glossy