Project Category:
Tower Speakers

Project Level:

Project Time:
20+ Hours

Project Cost:
$100 – $500

Project Description:
Towers with downfire woofer design based on the Infinity Crescendo CS3006 crossover

Design Goals:
My goal is to achieve a clean reflex design with a tweeter and midrange on the front face and a hidden woofer on the bottom to remove visual weight and give a more modern appearance.

Driver Selection:
Tweeter: Dayton Audio TD20F-4 3/4″ Soft Dome Neodymium Tweeter 4 Ohm
Midrange: Goldwood GM-85/4 Heavy Duty 5″ Sealed Back Midrange 4 Ohm
Woofer: Goldwood GW-208/4 8″ OEM Woofer 4 Ohm

Enclosure Design:
I based on the measurements of the original Infinity Crescendo CS-3006 box from which I took the crossover, changing the location of the woofer towards the bottom and leaving a free space of 5 cm between the box and the base to allow the operation of the driver.

Enclosure Assembly:
I made the enclosure in phenolic chipboard with double wall to leave the thickness of 3 cm with acoustic foam inside, with a reflex port on the top back side. The finishes were given with Oak veneer and catalyzed semi-matt lacquer and on the front and back with black ink to achieve the contrasting stripes.

Crossover Design:
Para el proyecto utilicé algunos crossovers Infinity Crescendo CS 3006 que tenía pensando en hacer este trabajo.

The set has a very balanced sound, the bass is deep although the placement of the speakers is important not to make the bass booming, the mid-range is very rich and the voices are clear, and the small tweeter has a clear sound without distortions. that does not tire the ear. I haven’t heard an original Infinity Crescendo CS 3006 speakers, I do not expect them to sound the same or better, but I liked the result a lot and the best thing was the whole process to make them … it is very gratifying!

About the Designer:
I’m an Industrial Designer who likes working with wood, but especially good sound and vintage equipment.

Project Parts List:

Dayton Audio TD20F-4 3/4″ Soft Dome Neodymium Tweeter 4 Ohm
Goldwood GM-85/4 Heavy Duty 5″ Sealed Back Midrange 4 Ohm
Goldwood GW-208/4 8″ OEM Woofer 4 Ohm
Speaker Cabinet Port Tube with Gold Trim 2-3/4″ ID x 5-1/4″ L Screened
Parts Express Speaker Gasketing Tape 1/8″ x 1/2″ x 50 ft. Roll


Add yours
  1. 1

    You did a fantastic job on the cabinets… the look is very striking, but still kind of classy, as well as classic all in one. What a nice reinterpretation of some nice speakers from the past.

  2. 5
    cale beecher

    What final impedance did it come out to? I have the same idea to use the crossover from a pair of cs3008. I’ve read the 3008 woofer is 8ohm.

  3. 7
    cale beecher

    Are the mid and tweeter boxed off from the woofer? I really want to build something extremely similar. I have a set of infinity cs 3008 crossovers I was going to use. I’ve been trying to find how the original cabinets were designed.

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