Home > 2-way, 60-90lbs, Bass Reflex, Bookshelf/Stand Mounted, Passive > Sonic Bluhm 2-Way Loudspeaker System

Sonic Bluhm 2-Way Loudspeaker System


Sonic Bluhm – 2-Way Loudspeaker System

Overview.

  • Designed and built for use as left / right pair for home theater system.
  • Primary use, movie and music playback

Features.

  • Vented box construction, providing lower f3 frequency
  • Unique shape to avoid following problems:
    • Panel Vibrations
    • Internal cabinet standing waves
    • Edge diffraction
  • 2.1 cubic foot internal box volume
  • Capable SPL, of 90 dB Continuous, 102 peak

Cabinet Construction.

  • Cabinet made using constrained layer construction
  • There are 4 layers to my cabinet (listed from outside to inside)
    • 1) 3/4″ 13 Ply Baltic Birch
    • 2) 1/2″ MDF
    • 3) 1/8″ Mass loaded vinyl
    • 4) 1/8″ Masonite
  • Rounded top edge
  • Only 3 visible screws per speaker, giving them a very clean and polished look

Drivers.

  • Woofer: Seas Excel 8″ W22EX001
  • Tweeter: ScanSpeak Illuminator D3004, 1″ soft dome

Documentation.

Testing Results.

System Frequency Response: Purple- Port, Blue- Woofer, Green-Tweeter, Red- Summation

Frequency Response, Tweeter Polarity Flipped


Horizontal Off Axis Testing: Green 0*, Purple 15*, Red 30*, Blue 45*, Yellow 60*


Vertical Off Axis Testing: Green 0*, Red 15*, Blue 30*, Purple 45*, Yellow 60*


Step Response


Impulse Responce


System Minimum Phase Response


Woofer Impedance: Yellow- 8 Ohm resistor, Red- Speaker System


Creative Commons License
Sonic Bluhm 2-Way Loudspeaker System by Dan Bluhm is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

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