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Archive for the ‘Passive’ Category

Smooth Smith Audio – 312c

April 29, 2017 Leave a comment

transducer_cp-7927jpg_34129667062_o

Designed by Eric “Smooth” Smith

Design Goals:

  • Hybrid as mixing monitors and entertainment system
  • Partially mobile/ Easy to fit in smaller spaces
  • Flat frequency response with variable low end
  • Budget: $2500

Key Features:

  • F3 of 28Hz
  • Sealed enclosure
  • +/- 1 dB from 150Hz to 20kHz
  • +/- 2 dB from 30Hz to 150Hz
  • MiniDSP active crossover @ 130 Hz, passive crossover at 3.5kHz
  • 1/2″ MDF, 1/2″ Cherry MDF

Drivers:

  • Eton 25SD-1 1″ Soft Dome Tweeter
  • Dayton Audio RS150P-4 6″ Paper Cone Woofer
  • Dayton Audio RSS315HF-4 12″ Aluminum Cone Woofer

 

Frequency Response:

 

F - 60

Integrated Frequency Response:

F IntOff-Axis Response

F - Horizontal Off-Axis

Harmonic Distortion

F - Harm Dist

Rear Sub-woofer Connection

transducer_cp-8318jpg_34246999196_o

Not Your Grandpa’s Speakers


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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.

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

Frequency Response
F-FQ
Integrated Frequency Response
F-IFQ
Not Your Grandpa’s Speakers Glossy
Not Your Grandpa’s Speakers Research Paper

AJJ 994’s 3-Way Floorstanding Passive System

April 28, 2016 Leave a comment

IMG_8937

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
  • 3rd Order Crossover at 2 kHz and 130 Hz
  • Additional 3rd 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

Screen Shot 2016-04-28 at 4.51.51 AMScreen Shot 2016-04-28 at 4.51.40 AM

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

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

CSS-616 Near-Field Mixing Monitors

March 23, 2016 Leave a comment

IMAG1566_1

Designed by: Courtney Schumaker

 

Design Goals:

• Mixing monitors for home studio

• Small to medium size for portability

• Accurate reproduction of sound, flat frequency response

 

Key Features:

• Portable

• Vented cabinet for low frequency extension

• Passive Crossover (Tweeter: 3rd order @ 1.6kHz, Woofer: 4th Order @ 2kHz)

• +/- 2dB Frequency Response

 

Drivers:

• Pearless Nomex 830869 – 8″ Woofer

• SB Acoustics SB26STAC-C000-4 – 1″ Textile Dome Tweeter

 

Frequency Response:

Screen Shot 2016-03-23 at 9.09.21 PM

 

Integrated Frequency Response:

Screen Shot 2016-03-23 at 9.11.33 PM

 

Horizontal Off Axis Response:

Screen Shot 2016-03-23 at 9.17.37 PM

 

CSS-616 Design Research

TPA-1000 Home Theater Speakers


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Design By:

Paul Bristol

Key dseatures

  • Tall, Slender Design
  • F3 of 48Hz
  • +/- 3dB response from 100 Hz-20 kHz
  • For Use with External Sub
  • Large Stereo Image/ Wide Dispersion

Drivers

  • Woofers: Seas Prestige L16N-SL 6” Woofer
  • Tweeter: Eton 25SD-1 1” Soft Dome Tweeter

Frequency Response

Screen Shot 2015-04-30 at 9.52.37 PM

Integrated Frequency Response

Screen Shot 2015-04-30 at 9.57.46 PM

Horizontal Off Axis

Screen Shot 2015-04-30 at 10.42.38 PM

TPA-1000 Speaker Glossy

Design and Testing

TPA-1000 Final Drafting

Aries I

May 6, 2014 Leave a comment

Aries I Loudspeakers

Designed By: Kevin “Hexecho” Gray

Description:
The Aries I loudspeakers were designed for use as desktop near-field monitor loudspeakers with a large soundstage and stereo image. A stand out feature of the Aries I cabinets are the high-Carbon gray Iron baffles and rear panels, this metal helps to add strength to the speakers while absorbing and dampening vibrations from the drivers, preventing the drivers from causing unsavory resonances in the wooden cabinets. The speakers are designed for an impressive transient response, and low-end extension with smaller sealed box, I wanted to make sure these speakers would give a kick drum some real kick. The speakers were intended for high-fidelity enjoyment along with music production and mixing, sporting a +/- 3 dB frequency response from 120Hz to 20 kHz with a +1 dB boost at 110 Hz.  The phenomenal off-axis frequency response of the Aries I allow it to excite a space with accurately reproduced sound, helping to add to the soundstage. Aesthetically the Aries I speakers sport an industrial style as-cast iron front and rear panels mounted into the deep-red 7 layer plywood cabinets by hex head bolts, and feature a the Aries sign on the outside of the right speaker layered in blue wood dye under the many layers of red.  After all of the metal work and parts costs the Aries I ran a budget of $800.

Design Goals:
Good low-end: F3~70Hz
Use of metal in speakers: Iron panels, aluminum woofer, titanium tweeter
+/-  3 dB frequency response
Bass boost: +1 dB at 110 Hz
Fit onto a desktop: 12″x12.5″x13″ 45 lbs
Great Transient Response
Big Soundstage

Frequency Response with Crossover  and Off-Axis Frequency Response

Full Range with crossoverhorizontal off axis

Pouring Aries I PanelPouring of an Aries I metal panel

 

The Dark Passengers – 2 Way Ported Nearfields


The Dark Passengers - Near Field Mixing Monitors

Designed and constructed by Andrew Villa

Design Goals

  • Portable
  • Accurate Response
  • Hi-Fidelity for creating/mixing SFX, Dialogue, and music
  • Tight transients
  • Good horizontal Off-axis
  • Dexter Themed
  • Used as Nearfield monitors

Key Features

  • Small size: 12 1/4″ x 10 1/4″ x 16 1/4″
  • +/- 1.6 dB from 80 – 20 kHz
  • Vented Enclosure = decent bass for small near fields
  • Cost $400
  • F3 of 72 Hz
  • Tight, precise sound
  • Great Clarity
  • Unique paint design

Drivers

  • Fountek FW168 6.5″ Aluminum Cone Woofer
  • Vifa XT25TG30-04 1″ Ring Radiator Tweeter

Testing Results 

Overall Frequency Response:

Plot 1 - Overall Frequency Response

 

Integrated Frequency Response:

Plot 2- Integrated Frequency Response

Purple: Tweeter, Yellow: Woofer, Blue: Overall Sum

 

Impulse response:

 

Plot 10- Impulse Response

Documentation

The Dark Passengers: design, drafting, and final testing

The Dark Passengers: Glossy