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Archive for the ‘1-20lbs’ Category

RSS-603 Reverberation Room Testing Speakers

April 29, 2016 Leave a comment

This set of speakers were designed as reference source speakers for testing in reverberation chamber. To be suitable for this condition the set of six speakers need to be able to reach a high sound pressure level with a frequency response of +/- 3dB per ANSI standards. Additionally, due the sound pressure needed at a constant duration, the drivers needed high power handling capabilities. The specific room that these will be installed do not accurately test below 400 Hz so this was taken into consideration in the design.

Tech Specs:

-F3 of 250 Hz

+/- 2.25 dB

Two way digital cross over

Mono for testing capabilities

Drivers:

Woofer: Celestion NTR06-1705B 6-1/2″

Tweeter: Tymphany D27TG35-0

Frequency Response

frqrep

Integrated Frequency Response

infreqrepSpeakerGlossy

AcattonTransducerPaper

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

Ignis Series 1

May 4, 2013 Leave a comment

Designed, Built, and Tuned by Jonathan Moths

Image

Design Goals:

  • Small size for desktop use
  • Low cost ($400-500)
  • Primary use is listening for pleasure
  • Maximize bass extension despite small size

Features:

  • 1″ diameter side port to enhance bass extension
  • Portability and small size (9 1/2″ x 9 1/4″ x 1’2″)
  • +/- 2 dB from 70 Hz to 20 KHz
  • F3 of 60 Hz
  • Metal Dome Tweeter

Drivers:

  • SB Acoustics SB26ADC-C000-4 Metal Dome Tweeter
  • SB Acoustics SBMFC35-4 6 inch Poly Cone Woofer

Combined Speakers2

Documentation:

Design_Statement

Drafting

Tuning_Report

Speaker Glossy 

GDX2

April 27, 2012 Leave a comment

GDX2

Overview

This 2-way desktop/bookshelf stereo pair was designed to be used for general music listening, as well as mixing.  With a ported cabinet, this system has an F3 of around 80 Hz, giving a good representation of bass frequencies without necessarily needing a subwoofer, though one can be used for added fullness.  Designed on a budget, this pair cost just under $500, giving high performance at a relatively low cost.

Goals:

  • Small size for desktop use, as well as portability.
  • Low frequency extension.
  • Flat frequency response.
  • Budget of $500.

Features:

  • 2-way system.
  • Passive crossovers.
  • Ported cabinet for low frequency extension.
  • Flat response curve (variation of 1.5 dB.)

Cabinet:

  • 3/4″ 11-ply birch exterior.
  • 1/2″ MDF interior.

Drivers:

  • SEAS Prestige h1141 5.5″ aluminum cone woofer.
  • SEAS Prestige h1211 1″ textile dome tweeter.

Documentation:

Initial Design Statement

Drafting Packet

Final Testing Report

Speaker Glossy

Testing Results:

Overall

Frequency Response

Green: Overall. Blue: Woofer. Yellow: Tweeter. Purple: Port

Frequency Response Curve

Reverse Polarity

Inverted Polarity on Tweeter

Crossover Filter Response

Crossover Filter Response

Horizontal Off-Axis

Green: 15 degrees. Blue: 30 degrees. Yellow: 45 degrees. Purple: 60 degrees.

Horizontal Off-Axis Response

Vertical Off-Axis Response

Red: 15 degrees. Green: 30 degrees. Blue: 45 degrees. Yellow: 60 degrees.

Vertical Off-Axis Response

Step Response

Step Response

Impulse Response

Impulse Response


Waterfall Plot

Minimum Phase Plot

Harmonic DistortionHarmonic Distortion

Tweeter

Tweeter Frequency Response

Frequency Response

Tweeter Horizontal Off-Axis Response

Purple: 15 degrees. Red: 30 degrees. Green: 45 degrees. Blue: 60 degrees.

Horizontal Off-Axis

Tweeter Vertical Off-Axis

Blue: 15 degrees. Green: 30 Degrees. Red: 45 degrees. Purple: 60 degrees.

Vertical Off-Axis Response

Tweeter Left/Right Difference

Step Response

Impulse Response

Green: Tweeter. Purple: 6 Ohm Resistor.

Tweeter Impedance

Harmonic Distorion

Woofer

Woofer Frequency

Woofer Frequency Response

Purple: 15 degrees. Red: 30 degrees. Blue: 45 degrees. Green: 60 degrees.

Horizontal Off-Axis Response

Blue: 15 degrees. Red: 30 degrees. Purple: 45 degrees. Yellow: 60 degrees.

Vertical Off-Axis Response

Woofer Left/Right Difference

Step Response

Impulse Response

Yellow: Woofer. Blue: 8 Ohm Resistor.

Woofer Impedance

Harmonic Distortion

Creative Commons License
GDX2 by Grant Prusi is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

DKS 800

April 8, 2012 Leave a comment

Design Goals
-Full extended frequency response
-Evenness in frequency
-Balance in frequency

Drivers
-Tweeter Audax TW025A8
-Woofer: Silver Flute 8 Wool cone 4 ohm

Materials
-1/4″ MDF
-3/4″ OSB plywood

Documents:

DIMENSIONS FOR DKS 800

crossover schematic

Tuning Report

Whole System Response

Initial Woofer

Initial Tweeter

Whole System Waterfall

DKS 800 by Daniel Serunjogi is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Green Run: Critical Editing Speakers

April 28, 2010 Leave a comment

What they lack in size they make up in clarity and versatility. Designed for

Green Run Right Cabinet

near-field desktop audio editing, these speakers are created to
reproduce the sound signal with maximum clarity.  Optimized and built
small to fit at any editing environment and portable for the nomad
lifestyle.

Design Objectives:

  • Bookshelf monitors for audio editing for music, sound effects and film
  • Wide frequency range (60 Hz to 20 kHz)
  • Smooth frequency response
  • Inexpensive
Green Run

Green Run Left Cabinet

Key Features:

  • Small, and portable
  • Clear stereo image
  • Minimal off-axis coloration
  • Low crossover frequency of 1.5kHz
  • Under $500

Design Statement

Tuning Report

Crossover Schematic

Cabinet Drafting Plans

System Response
Final System Response Charts Left Cabinet

Final System Response Charts Right Cabinet

SB Acoustics 29RDCN C-0004

Final Tweeter Response Charts Left Cabinet

Final Tweeter Response Charts Right Cabinet

Fountek FW 146

Final Woofer Response Chart Left Cabinet

Final Woofer Response Chart Right Cabinet

Creative Commons License
This work is licensed under a Creative Commons Attribution-No Derivative Works 3.0 United States License.