The BSC is necessary, otherwise the sound isn’t balanced. Of course the bass doesn’t blow you away, but 50 Hz is there and it fills my room with music. Of course they did not play as loud as the bigger two-way speakers that I built before, but something else was fascinating. When the recording is good for example ‘Songs from the last century’ by George Michael and the recordings from Norah Jones the artists seem to be standing in front of you. Created 5 May Naturally you can use material of a different thickness, but be sure to adjust the dimensions in the plan. Figure 1 shows the calculated frequency response for the FX for the enclosure shown in Figure 2.
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Fostex FX120 Fullrange Speaker Driver (Transducer)
Naturally you can use material of a different thickness, but be sure to adjust the dimensions in the plan. However, there are compromises with fullrange drivers; little drivers have disadvantages at the low end and bigger ones at the top end. Eange sure to seal the box carefully. Also, I placed some felt behind the driver and at the end of the line to avoid reflections. The wiring must be in place and the hole in the back for connecting the wire with the BSC has to be sealed.
I decided to give them a try and was surprised ranve the sound quality! Looking for more information about fullrange drivers, I found the Mathcad worksheets by M.
Fostex FX – Fullrange buy at
The goal was to let them go down to about 50 Hz. King and decided to try a speaker fange of my own. I was surprised with the performance of this driver.
The BSC is necessary, otherwise the sound isn’t balanced. The TQWT enclosure gets good low end from this little driver.
Fostex FX Fullrange Speaker Driver (Transducer)
The enclosures were made using 15 mm birch-multiplex, the front baffle and the top is 19 mm beech, and the inner plates are 16 mm MDF. Before I closed the box with front and top there were four things to do.
The two panels out of aluminum on the front and top are anodized in black and covered with a shiny clear coat. I have no measurement equipment, but what I hear seems to correspond with the simulation. Of course the bass doesn’t blow you away, but 50 Hz is there and it fills my room with music. Fullrange drivers seem to play music with more coherence, more life and they sound more direct. My first try was a speaker using the Fostex FEEbut I never made proper cabinets for them because my wife said “No way, they are too big”.
With his feedback “I think you have a design” I want to thank Mr. Searching a smaller driver the Fostex FX, a 12 cm fullrange unit caught my eye. The FX will need a little help on the bottom end. For the base-plate I rangf a granite plate at a stonecutter’s store, he made them for a moderate price for me.
Afterwards I contacted M. King and asked him to have a look at the simulation I had completed. First I attached nylon strings between the sides to keep the damping material from falling to the bottom. King for his kind help and advice I made some test enclosures out of chipboard.
There is not much information available for this driver, but the feedback from people who have used was positive. Last update 14 April In my opinion the FX is worth every cent you pay for it. The cavity in the cabinet was filled with gravel to add some mass to the enclosure and prevent resonance.
rrange Of course they did not play as loud as the bigger two-way dull that I built before, but something else was fascinating. Figure 1 shows the calculated frequency response for the FX for the enclosure shown in Figure 2. Created 5 May The enclosures finish consisted of sanding 60, then and then grit sandpaper and four treatments “hard wax oil” that fires up the color of the wood and protects the surface.
I played with the length of the port and tested several values of inductors and resistors for the baffle step correction BSC circuit.
At first they were a little bit harsh but after about hours they smoothed out.