Free support for loudspeaker projects, sourcing OEM speaker building supplies, and passive crossover design. We sell raw speaker drivers (tweeters, woofers. Fostex FEE. new old stock, sealed. condition new. sold as Fostex FEE is a mm (“) full-range driver. The driver is well built and like. Shown is an example of a. FEE double bass reflex type enclosure. • Multiple bass reflex ports repro- duce lower frequency. • The first port is tuned ‘Fb’ to.

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In a bipole system, both drivers fire in phase with one another, but in opposite directions. Each plays to a somewhat different strengths.

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Because of its very flat frequency response it makes a good small control monitor for music or video editing. It also sounds really good. However, I fe217e to go with 23L for aesthetic reasons and to allow for an easy conversion to a T-Line had I been disappointed with the sealed results. This is accomplished by the use of small panels no box wall has a greater unbraced panel span than 5″ mmthe use of relatively thin, light, and stiff baltic birch plywood, and the driver braced against a large portion of the mass of the box panel to spread that energy as thin as possible.

The Fostex FEE is a mm 4. In addition to the cabinet bracing, small blocks of various sizes and shapes were glued to the inside panels in random and non symmetrical locations to further alter resonances and helped to use up the 1.

Fostex FEE Full Range Speaker | eBay

It turned out really well Since we are also playing with small tube amplifiers W we wondered whether the much more efficient Fostex FEe would fit in a miniOnken-like enclosure.

On that basis, this project uses a sealed enclosure in an attempt to get the best mid-range performance from these drivers. The FEE has been used in a wide variety of enclosures including sealed, bass reflex, Transmission Line and Quarter Wavelength enclosures. Despite the reduced efficiency, sealed designs are quite popular as they promote a smooth frequency response and excellent cone control which translates into accurate sound reproduction.


Fostex FE127E Specifications

It is magnetically shielded for use near television or CRT monitor. Finished versions of the miniOnken with planethifi modified drivers also available separately can be special ordered and flat-paks are under development. The enclosure design has taken the golden ratio into consideration which helps with the final sonics.

See the modifications and tweaks for the Fostex FEEn fullrange speaker driver for an example. Here the Fostex FEE fullrange driver is used in a small vented bass reflex box. Rostex near-aperiodic nature is seen in the Fonken impedance curves below — it is indicated by the small peak on fe127r lower side of the resoance saddle. Inspired by a deep regard for the look of Tony Gee’s Solothe miniOnken for the FRs literally came in a flash fe127 might consider the Solo as the fonken for the FE The box structure is quite inert to box-wall resonance induced colourations.

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A box designed to this ratio will have smaller resonant peaks than one whose dimensions are equal. Instead of brute-force, the frequency of panel resonances is pushed up to where they are unlikely to ever be excited — effectively eliminating them. Figure 01 shows the calculated frequency response. These speakers do really well with any sort of vocals, jazz, and simpler classical music. The following circuit was added to the speaker input terminal. Created 12 November Even more far-out versions have been proposed 1.

While these ratios may not result in aesthetically pleasing dimensions, it is best to keep the internal dimensions from being multiples of any another internal dimension. This in turn results in unpleasant distortions which are present throughout the mid-range. Last update 12 July The measurements were made at about 22 degrees Celsius.

A Sealed Enclosure, often referred to as an acoustic suspension enclosure, is the simplest form of a speaker box. The enclosure design for this project is fe127r below in Drawing Other added benefits of a sealed enclosure include a much higher attainable SPL and a better overall bass response as the speakers will be coupled with a subwoofer.


BiFonken Mk ii beta. The Fostex FEE driver is cm 4. There is no rule to say the response has to be flat and in this instance, sounded much better with the 1 dB peak.

As a result, sealed box systems are typically the least efficient enclosures since half of the radiation from the driver i. Created 19 June I had a lot of success with this driver in fw127e Sealed Bipole Speaker Enclosure.

Last update 17 December Note – this driver has been discontinued and is no longer being produced. Used in the right location, wall loaded and in a smaller room, fs127e speaker has very special sonics which can bring out spectacular mids. The above calculations are for inductor and resistor values to suit the FEE driver DCR of 6R9 on the sample used and the baffle width. Another positive characteristic of fosteex bipole system is fosgex the rear driver compensates for the baffle diffraction stepand thus no electronic correction circuit is required.

The table below shows a comparison of the measured results. The cone is made fw127e banana plant’s fiber and this it is very light and the driver is fast.

The sonic character of these two speakers are different. The Fonken likes small amps with highish output impedance like SETs, no-feedback push-pull. Pushing these tiny X max drivers to produce bass tends to cause some loss of cone control, even at low SPL.

This may be useful to easier mate with a woofer — or in the case of the miniOnken lean out rostex bass in a room where it is otherwise overfull.