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Smooth Smith Audio – 312c

April 29, 2017 Leave a comment

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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

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TUX-01

April 28, 2017 Leave a comment

Speakers 1Designed 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 FR

FR Full System All Axis

TUX-01 Research

TUX Speaker Glossy

Sandcastle 7.2


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Designed by: Eric Bartos

Goals

  • 7.2 surround sound system for enjoyment and the occasional mix
  • +/- 4dB response
  • active crossover

Key Features

  • F3 of 38Hz on surround speakers (before crossover between subwoofer)
  • F3 of 34Hz on center speaker (before crossover between subwoofer)
  • F3 of 24Hz on subwoofers
  • +/- 4dB from 50Hz to 21kHz on surround speakers
  • +/- 4dB from 47Hz to 21kHz on center speaker
  • +/- 2dB from 25Hz to 200Hz on subwoofer
  • center speaker has active/passive crossover system
  • 1/2″ birch ply and 1/2″ MDF construction for center speaker and surround speakers
  • 1/2″ birch ply and 3/4″ MDF construction for subwoofers
  • BSS Blu-100 & BSS Blu-BoB for DSP

Drivers

  • Woofer: Dayton Audio RS225-8
  • Tweeter: Seas Prestige 19TFF1
  • Midrange (Center speaker only): Dayton Audio RS52AN-8
  • Subwoofer: Eminence LAB12-C

Frequency Response

Surround speakers

Surround Overall 60db range

Surround Integrated Response

surround integrated 40

Center Speaker

center response 60.png

Center Integrated Response

center integrated 40

Subwoofer

sub response 60

Sandcastle glossy

Sandcastle Research Paper

Sandcastle Final Testing

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

Drivers

  • Scanspeak D2604/32000
  • Dayton Audio RS225

 

Frequency Response

Frequency

Documentation: 

Design & Final Testing Report

Glossy

Aeternus Lux 2.2 Modular System

May 11, 2013 1 comment

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)

Integrated Response

Sub Response

Sub Response

Impulse Response

Impulse Response

Documentation: 

Design Report and Final Testing

Aeternus Lux Drafting

Glossy

Raving Behemoths


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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

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Documentation

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JH Array


Introduction

Designing speakers is a battle of the minds. This battle can prove to be long and drawn out but when you reach the end it is very rewarding. There are so many different designs that can be implemented it is very challenging to select something and stick with it. As I have found out you can have a design and then see another design and immediately want to incorporate or change to the new design. I relate it to a kid in a candy store. The kid has his eye set on a jaw breaker going in but when all is said and done he walks out with a giant gummy bear. As long as the end product fully satisfies what you want it to than you have completed the mission.

Design Goals

The design for the JH Array came from a line array system. Working in live sound thats just about all you see and hear now. So I wanted to take what I listen to at work and make is sound better, look cooler and hang in my living room. In order to make them sound better I used quality drivers as well as solid box construction in order to get the sound I wanted. In order to make them look cooler I decided to go with a satin black center and bare wood sides this gave it contrast and some warmth that line arrays lack. Finally hanging in myliving room. I designed both boxes with anchor points so that it is possible for me to put some eye bolts into them and hang them from any rig point.

Features

  • All sealed boxes to provide good transient response
  • MTM speaker layout to provide good off axis listening
  • Frequency Response +/- 3dB

Drivers

  • Tweeter: ScanSpeak Illuminator D3004, 1” Soft dome
  • Mid Range: Peerless HDS 830883 6 1/2”, Nomex diaphragm
  • Subwoofer:TC Sounds Epic 12” DVC Subwoofer

Box Construction

  • Boxes built using constrained layer construction
  • Mid & Tweeter Box (outside going in)
    • 1) 1/2” Birch Ply(top, bottom, front and back)
      • 3/4” Baltic Birch(Sides)
    • 2) 3/4” MDF
    • 3) 1/8” Mass loaded vinyl
    • 4) 1/8” Masonite
  • Sub box
    • 1) 1/2” Birch Ply(top, bottom, front and back)
      • 3/4” Baltic Birch(Sides)
    • 2) 3/4” MDF
  • Rounded Sides
  • Screws only visible in the rear
  • Magnets in baffle for grills \
  • Sub bracing also supports voice coil

Final Results

Frequency Response

Horizontal Off Axis

Vertical Off Axis

Left Right Difference

Waterfall

Tweeter

Frequency Response

Horizontal Off Axis

Vertical Off Axis

Impulse

 

Mid Range

Frequency Response

Horizontal Off Axis

Vertical Off Axis

Impulse

Sub Woofer

Frequency Response

Horizontal Off Axis

Vertical Off Axis

Impulse

Crossover Response

Documents

Design Proposal

Testing Report

Enclosure Drafting

Crossover Design