Fostex has always been highly regarded in the “Full /Wide range” product category. There are always a few that stand out above the others, and the FX is. It looks like there are not so many people that ended up buying the Fostex FX , despite there seems to be a widespread good opinion about. Information about the Fostex FX fullrange speaker driver (transducer) including datasheet and speaker box (enclosure) plans.
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There is a bit of damping material in the upper, smaller chamber only.
Figure 3 below shows a sweep of the frequency response from about Hz and up. Figure 1 shows the calculated frequency response for the FX in a 0. The prefabricated enclosures are constructed out of MDF and have a volume of 0. You are commenting using your Facebook account.
You can use the component values shown in Figure 2 and tune the BSC to suit your room and amplifier. Leave a Reply Cancel reply Enter your comment here I guess this is do to the clarity and coherence of the sound.
Once all that is complete, add binding posts, wire the speakers and screw the baffle on. Notify me of new comments via email. Notify me of new posts via email. Recently I have had some very good success with a couple of DIY tower loudspeaker projects that used fullrange speaker drivers.
In the photo the FX bookshelf speakers are paired with an 8-inch sealed subwoofer located in the corner on the right. Finding myself with the need for a small pair of speakers studio monitor or bookshelf speaker I decided to once again use a fullrange driver.
The bass performance of them is also astonishing when they are placed fairly close against the wall. About 3 to 5 dB of attenuation is a good starting point. The sound they flstex is incredible. I set out to find a tostex quality driver with a reasonably flat frequency response.
The frequency response was calculated using WinISD. The chamfer was created using a router.
The photograph below shows the front baffle with the driver and port installed. The speaker cabinets are only lightly damped. The owner was very helpfull and responsive and can be recommended. Very dynamic, detailed and live like. I have recently built these double bass reflex box speakers. Fostexx crossover or notch filter is being used. Learn how your comment data is processed.
I used birch plywood for the cabinet 16mm. The tostex and the drivers have been purchased at Art of Sound. Removing the need for the small Fostex driver to push the bass tones greatly reduces distortion and improves the sonic performance.
Fostex FX120 – Double Bass Reflex Loudspeaker
The fullrange fostwx used is a Fostex FX You are commenting using your Twitter account. Finished photographs of the speaker are shown below. A stapler was used to hold the damping material in place. Sorry, your blog cannot share posts by email.
You are commenting using your WordPress. For maximum performance, it is important to have good airflow from the rear of the driver into the enclosure.
The enclosure was tuned to about 63 Hz by using a 42 mm diameter port with a length of 65 mm. The main problem I faced was that I am not skilled with woodworking, but I wanted a pair of attractive speakers. Through the reciever settings, I have some control in selecting the speaker-subwoofer crossover point which I have set at 80 Hz.
The bookshelf speakers sit on VTI stands and are connected to a Denon home theater receiver in a 2. View all posts by zimmer This site fc120 Akismet to reduce spam. The impedance sweep confirms the box tuning of ffostex 63 Hz.
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The amount of attenuation required will be user, room and amplifier dependent. The -3 dB point is about 58 Hz.
Martinsson’s Blog – Fostex FX DIY proposal
The Fostex FX fullrange driver looked like a very good choice. I have partnered them with my first LM based chipamp in a test setup on a piece of MDFwhich you can also see on the picture below. The enclosure design is from Fostex as well. Short of ordering a custom build, using a prefabricated speaker enclosures seemed like an excellent idea. The MDF speaker baffle is one inch 25 mm thick so it is necessary to create a chamfer behind the driver to improve airflow.