Scary Stereo

Scary Stereo was born from my wish for big scary tower speakers. I wanted nice home theater speakers for my living room as big as I could possibly get them. When thinking of how to use all the surface area, I decided to paint them with chalkboard paint. As these speakers are for listening forward I prioritized low-frequency extension with the large size of the cabinet as well as 15″ subwoofer drivers. My subwoofers pair with my mid and tweeters to make a transparent sound stage reaching above 20k.

Goals

• Bass Extension
• Transparency
• Pleasing to the ears

Drivers

• Dayton Audio RSS390HO-4 15″ subwoofer
• SB Acous)cs SB17NBAC35-4 6″ midwoofer
• SB Acous)cs SB29RDAC-C000-4 tweeter

Specifications

• F3 below 20 Hz
• +/- 2dB mid/highs

Measurements

Full Tuned Speaker Frequency Response

Integrated Frequency Response

Subwoofer (green) and port (blue) Frequency Response

scarystereotechnicalpaperDownload

SOUND STRIPED – 2X298

Designed and built by Matthew Jacobson

Introduction

The Sound Striped two-way home speaker system was designed to fit in with a night of fun, whether that be a night of movie watching or jamming to some tunes. To achieve this goal, the cabinet was designed to be noticeable, bright, and striking. The end result created a loudspeaker layered with stripes of several different types of wood, including redheart, padouk, birch, and maple across its front baffle, reminiscent of something you may see down a bowling lane.

The cabinet was designed to work as a floor standing system, with a height under 2′ tall. The angled front baffle was constructed to allow the sound to be directed up towards the listeners in an average living room. This allows for ideal listening when seated for a movie watching experience.

However, the striking aesthetics would not be enough to fulfill the goal of the loudspeakers. The two-way system was made for the listener to fully experience the booming, explosive sounds that may be heard in movies, or for the thumbing beats and satisfying kicks heard in music. In other words, the clean, bass-boosted system was made to really be noticed.

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Design Goals

• Affordable component and construction cost
• Room filling sound pressure level output
• Deep bass response
• Clean sound with low distortion

Key Features

• Sharp, striped front baffle
• Ported enclosure designed for low bass response
• Good off-axis response for multiple listeners
• Active cross-over design allowing for easy future adjustments

Specifications

• 12″ x 23″ x 21″ Cabinet Dimensions
• Designed F3 of 28 Hz
• Two SB Acoustics 29mm Textile Dome Tweeters
• Two Dayton Audio 8″ Reference Woofers

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Photo Gallery

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Note: Loudspeaker construction occurred in Spring 2020 semester, during the COVID-19 epidemic. This hampered plans for the final tuning of the loudspeaker design. The attached documentation covers up to cross-over design of the speakers.

speaker_documentationDownload

TUX-01

Designed by Andrew Summers

Design Goals:

• Create a rugged speaker system that is ready for the road
• Flat frequency response for accurate mixing
  • +/- 3dB or better

Key Features:

• 2.5 way hybrid crossover
  • Combination of miniDSP and passive crossover point in-between tweeter and mid-woofer
  • 2nd order crossover at 200Hz between mid- and sub-woofer (active)
  • 2nd order low pass filter on mid-woofer at 800Hz (passive)
  • 2nd order high pass filter on tweeter at 3kHz (passive)
• F3 of 48Hz
• +/- 2dB from 20kHz to 50Hz
• Sealed enclosure
• All SB Acoustics drivers
  • Sub-woofer – SB29NRX75
  • Mid-woofer – SB13PFC25-08
  • Tweeter – SB26STCN-C000-04

Construction:

• 1/4″ birch ply on all exterior walls
• 1/2″ birch ply on front baffle
• 1/2″ MDF on all interior walls
• 1/2″ birch panel in between mid-woofer and sub-woofer to create a separate sub cabinet
• 1/4″ aluminum extrusions
• Aluminum corner caps
• Rust-oleum Black Truck Bed Liner finish

TUX-01 Research

TUX Speaker Glossy

8X25R

Designed By Samuel James Balk

Design Goals:

– 2.5-way design

– Active processing

– F3 of at least 50Hz

– Visually striking

Key Features:

– 2.5-way design

– +/-1.5dB from 50Hz to 30,000Hz

– Excellent Off-Axis Response

– Handmade compound front baffle constructed with layered 1.5″ MDF wrapped in carbon fiber

– Sealed enclosure

– Rear cabinet constructed with 1/2″ plywood and 1/2″ MDF sandwiching mass loaded vinyl

– 4th order asymmetrical crossover at 2200Hz

Drivers:

Fountek FW200 8″ Aluminum Woofers

Fountek NEO X 3.0 Ribbon Tweeter

Frequency Response

Integrated Frequency Response

8X25R Research

8X25R Glossy

 

Parviflorus UP-906

Designed by:  Chris Trevino

Design Goals:

• Mixing Monitors for Game & Film SFX
• Classic Look
• Tight, Accurate Sound
• Adaptable (designed around MiniDSP)
• Medium portability
• Budget: $1200

Key Features:

• F3 of 43Hz
• +-2dB from 53Hz-20Khz (after microphone adjustment)
• 2nd Order LR Crossovers (Woofer @ 2500Hz; Tweeter @ 2000Hz)
• Sealed Box
• 7/8″ Cherrywood Front Baffles
• MiniDSP Amplifier
• Under Budget: Actual Cost $1100

Drivers:

• SB Acoustics SB23NACS45-8
• SB Acoustics SB26ADC-C000-4

Frequency Response (Unadjusted from Microphone Idiosyncrasies):

Integrated Frequency Response(Unadjusted from Microphone Idiosyncrasies):

Impulse Response:

Waterfall Plot:

Documentation: 

UP906 Research Paper

UP906 Handout