Buy Fostex FEEn 8″ Full Range Speaker: Speakers – ✓ FREE DELIVERY possible on eligible purchases. ES cone and center cap are adapted. This new diaphragm material has the fine, supple and high density fiber, and its characteristics successfully improve the. Used Fostex FEEn Loudspeakers for sale on + second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability.

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Two strands of wire wrap wire fine 30 AWG silver plated copper wire is use for both positive and negative of the speakers. Because these speakers are so fast and dynamic it really is a challenge to find a subwoofer that can keep up. Where these drivers can sound overly forward too hot in the mid-range this adjusts that forwardness leaving the bass and treble better balanced.

I have added bituminous aluminium foil to dampen the driver frame. But when it comes to flea power amps they can make “boogie” real loud. Figure 2 shows typical values for use with this double bass-reflex speaker enclosure. The whole box sounds like it is working real hard. To evaluate I listened to the speakers with and without the BSC circuit, with and without the grill covers and all possible combinations in between.

That was the finished I had envisaged, dull and heavily stippled. Because of the big bass lift offered by the double bass-reflex type enclosure, test tones at 40Hz, 31Hz, 25Hz and even 20Hz are quite audible. Created 17 September You can also try to wall-load the speakers but pulling them closer to the rear wall to try lift the low-end.

In the final assembly steps, most of the slack from the connecting wire double strains of lightly twisted wire wrap wire was removed and the drive screwed securely onto the boxes with supplied gasket.

Fostex FE206En in Double Bass-Reflex Speaker Enclosure

See the Fostex FEEn in dual chamber box double bass reflex thread for more information or to ask any questions. I find that the mid-range richness is why these drivers can sound good with acoustic instruments and especially vocal.

The use of an additional chamber in the speaker enclosure also reduces the likelihood of resonances. Low frequency response from around Hz is gently damped with a controlled peak at Hz. That seems consistent with what is described on the enclosure plan, “Internal volume of 45 liters tuned to approximately 50Hz Fb.


Experiment by starting with a speaker toe-in of about degrees and adjust for best results. With the circuit you also lose a little of the speakers sensitivity, which could be an issue with low power amps.

To achieve this I used a cheap paint-roller and after going once around the box with a white undercoating paint, I went around three more times with a semi-dry roller to really tease-up that stipple finish. The extremely large magnet of the driver is also covered with bitumanized heavy aluminium foil to reduce sound reflections from the back of the box.

The double bass-reflex speaker enclosure plan is from the datasheet that was included with the Fostex FEEn driver. The top chamber of the double bass-reflex speaker boxes is lined but not stuffed with Dacron poly fill.

The fill material is used to dampen the rear wave from the driver and minimize standing waves and reflections within the speaker enclosure. Now many may find that the BSC circuit can reduce or suppress the dynamics and for that reason I don’t really like to use them. I don’t have a microphone setup but using the Stereophile test CD, bass starts to roll off very slowly from about hz until you reach about 50Hz where there is a definite rise and a there is an even bigger rise at 40Hz.

So much so that I had to have a pair for myself.

Those who know me know that I love my flea power single-ended SE valve amplifiers. While the rise at 40Hz does not make itself present in general music listening, it does add drama when listening to movies which is the primary role these speakers are intended to fill. The bottom gostex of the speakers remains empty. The stipple finish, which had started with the undercoat, was now built on 206n the top coat. There are many tweaks and modifications that can be done to improve the drivers.

With so little available power it is easy to understand why high-sensitivity loudspeakers are required.

Luckily when the double bass-reflex speaker boxes arrived they had already been sanded down and that meant I only had to finish the surface preparation with a pass of fine sand paper before applying a coat of primer.


A family friend had built me the back-loaded horn speaker cabinets and at the same time a pair double bass-reflex boxes also for the Fostex FEEn driver. The double bass-reflex DBR speaker system is a variation of the standard bass-reflex BR enclosure that is intended to achieve further extension of the bass response.

The best combination turned out to be with the BSC circuit and 206e grills covering the drivers. I wanted a dull stipple finish so reflections from the big screen TV from the sides of the speaker boxes would be minimized.

I have had a pair of Fostex single driver back-loaded horns for a few years now. What the BSC network does is to tame from the fosetx on up, without affect the lower bass response.

Fostex FE En – Fullrange buy at

But if you find just the right volume the speakers can really sing. The augmentation to the bass output is achieved by the use an additional chamber in the bass-reflex process. The bass from these speakers was always very impressive. The photos below show the Fostex FEEn fullrange speaker drivers.

The advantage is that there is no crossover distortion or suppression of the dynamics which occurs with almost all passive crossover circuits. The power output from these amps ranges from 2. Putting your ear to the port with a 40Hz tone you can hear air rushing in and out. This process worked out very well. You will want to take time to find the best sepaker placement as proper placement will be rewarded with excellent acoustics.

The circuit is simple, just one inductor and fodtex resistor in parallel with each other and in series with the speaker. Once more I went back over each surface three or more times using a semi-dry roller. For those who will ask, the impedance equalization circuit Zobel network for the Fostex FEEn driver shown Figure 3 can be used.

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