Model 750

an indication of the center of the pan pot’s rotation. In this position signal is sent essentially equally to both the left and right buses.

The pan circuitry is a “constant-energy” type, ensuring that as the signal is “panned” across the left/right stereo field, the total energy sent to the buses remains constant. A 3dB level increase will be observed on the left VU meter when the pan pot is set to the fully counterclockwise position. You’ll observe a 3dB increase on the right meter when fully clockwise.

Bus Assignment

Located below the level and pan controls are two buttons, labeled AUX and MAIN. These buttons control the connection of the audio signal coming from the pan pot to the AUX and main audio buses. In addition to audio signals, the AUX button also controls the status of the AUX inter- rupt control bus.

AUX Bus Assignment

The assignment button labeled AUX con- trols the routing of the left and right audio signals to the AUX audio bus. In the off (out) position, signals are not routed to the bus, and the AUX interrupt control bus is not enabled. In the on (in) position, the signals are routed to the AUX audio bus, and the AUX interrupt control bus is en- abled. A status LED, orange in color and visible through a “window” in the button, lights whenever the button is in the on position.

Note that enabling the AUX interrupt control bus may, or may not, have a noticeable effect on the Model 750’s operation. It will depend upon the settings of configuration DIP switches 6 and 7.

Main Bus Assignment

The button labeled MAIN controls the assignment of the left and right audio signals to the main audio bus. In the off (out) position, the signals are not con- nected to the main bus; in the on (in) position, the signals are connected to the main audio bus. A status LED, green in color and visible through a “window” in the button, lights whenever the button is in the on position.

Figure 10. Detail of front panel showing stereo line input channel (typical of 2)

Model 750 User Guide

Issue 3, May 1997

Studio Technologies, Inc.

Page 25

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Fostex 750 manual Model
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750 specifications

The Fostex 750 is a premium closed-back headphone that has garnered attention for its combination of advanced technology, comfort, and sound fidelity. Designed primarily for studio applications, the Fostex 750 delivers an exceptional listening experience that caters to both professionals and audiophiles alike.

One of the main features of the Fostex 750 is its dynamic driver technology. The headphones are equipped with large 50mm titanium-coated drivers that provide a powerful and clear sound reproduction. This driver configuration is engineered to deliver a wide frequency response, ranging from deep bass to sparkling highs, ensuring that every detail of the audio is captured. With an impedance of 25 Ohms, the headphones are highly efficient and can be easily driven by a variety of devices, including portable music players and digital audio converters.

Comfort is another highlight of the Fostex 750. The headphones feature plush ear pads made from soft polyurethane, which provide excellent cushioning for extended listening sessions. The adjustable headband offers a customizable fit, allowing users to achieve an optimal acoustic seal that enhances sound isolation. This is particularly beneficial in studio environments, where external noise can interfere with critical listening.

In terms of build quality, the Fostex 750 boasts a robust yet lightweight design. The combination of high-quality plastics and metal components contributes to its durability, while the foldable structure makes it portable and convenient for travel. This practicality is further enhanced by the detachable cable, which allows for easy replacement in case of wear.

Another notable technology integrated into the Fostex 750 is the use of new acoustic engineering principles. These headphones feature a closed-back design that minimizes sound leakage and provides an immersive listening experience. This design is complemented by the innovative bass reflex system, which enhances low-end response without compromising clarity in other frequency ranges.

Overall, the Fostex 750 is an impressive headphone that combines advanced sound technology, comfort, and durability. Its dynamic drivers, ergonomic design, and acoustic engineering make it an ideal choice for both professional monitoring and casual listening. Whether you are mixing in a studio or enjoying music on the go, the Fostex 750 delivers an unmatched audio experience that is sure to satisfy even the most discerning listeners.
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