Detail of front panel showing setup section

Model 750

Stereo Line Inputs

The Model 750 contains two identical stereo line input channels. They are unique, having the ability to support true stereo sources, as well as single or two- channel monaural sources that are com- mon to broadcast environments. The circuitry was designed for compatibility with signals that have a nominal level of +4dBu. However, nominal signal levels of –10 to +10dBu are perfectly acceptable.

Level Controls

Two level controls are used to set the amount of input signal that is sent to the left/right routing buttons, and subse- quently on to the main and AUX bus assignment buttons. The inner knob controls the level of the left channel input signal; the outer knob controls the right channel signal. On the front panel, note the small arrow graphic symbol and the letter “U,” located at approximately the “1-o’clock” rotation position. This indi- cates the approximate setting for the level controls to give unity gain.

Status LEDs

Two bi-color LEDs serve as signal present/peak indicators for the left and right signals. Electrically they monitor the output of the left and right level controls. The LEDs light with the color green when the signals are 18dB or greater below the Model 750’s nominal internal operating level. The LEDs light with the red color when the signals are within 6dB of the maximum.

Input-to-Output Channel Routing

From the level controls, the signals pass to two pairs of channel assignment but- tons. The assignment buttons allow the

input signals to be routed and, if desired, combined before being sent to the main and AUX bus assignment buttons. The four routing buttons provide a unique and powerful function, allowing the left and right input signals to be routed in any manner desired, not simply the “left input connects to left output” and the “right input connects to right output” situation that is found in most audio mixers. This flexibility is provided specifically for broad- cast applications where a source signal

Figure 11. Detail of front panel showing setup section

Issue 3, May 1997	Model 750 User Guide
Page 26	Studio Technologies, Inc.

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.