External Monitor Inputs, Monitor Output

Model 750

“bars and tone” position. For maximum flexibility, it is recommended that these signals be connected by way of the patch bay. In this way they can be accessed for test and calibration purposes.

The electronically-balanced, nominal +4dBu outputs are accessible via two ¼-inch 3-conductor phone jacks. The circuitry is capable of driving balanced or unbalanced loads of 600 ohms or greater. Prepare the mating connectors (plugs) so that tip is signal high (+ or hot), ring is low (– or cold), and sleeve is shield. To con- nect to an unbalanced load connect the tip to high (+ or hot), and both the ring and sleeve to shield.

Two trim potentiometers are used to set the output level of the setup direct output. Refer to the Configuration section of this guide for details.

External Monitor Inputs

Two external audio signals can be con- nected, allowing them to be monitored independently of the internal audio buses. It is intended that the external monitor inputs will be connected to outputs associ- ated with off-air, microwave, or satellite receivers. Both inputs are stereo, elec- tronically balanced, and interface using ¼-inch 3-conductor phone jacks. External Monitor Input 1 is compatible with signals that have a nominal level of +4dBu. Exter- nal Monitor Input 2 is compatible with –10dBu or +4dBu signals. A DIP switch, located on the front panel of the Model 750, is used to set the input sensitivity. Refer to the Configuration section of this guide for configuration details.

As an installation aid, a connection made only to the jack labeled L/MONO routes the signal to both the left and right input

circuitry. This allows a monaural signal to be monitored in a 2-channel mono format. If you wish to have a mono input con- nected only to the left input, simply insert an unterminated plug into the associated right input jack. This will break the “nor- mal” connections that link the left and right input circuits.

Prepare the mating connectors (plugs) so that tip is signal high (+ or hot), ring is low (– or cold), and sleeve is shield. With an unbalanced source connect the tip to high (+ or hot), and both the ring and sleeve to shield. If connecting to an unbal- anced source in this manner results in hum or noise, connect tip to high (+ or hot) and ring to shield; leave the sleeve unterminated.

Monitor Output

The monitor output is designed for con- nection to an audio power amplifier asso- ciated with a pair of monitor loudspeakers. In mobile applications it may prove com- mon for loudspeakers with internal amplifi- ers, such as those from Fostex, to be connected to the Model 750’s speaker output. The outputs are electronically- balanced, line-level, and can drive bal- anced or unbalanced loads of 600 ohms or greater.

The monitor output utilizes two ¼-inch

3-conductor phone jacks for interconnec- tion. Prepare the mating connectors (plugs) so that tip is signal high (+ or hot), ring is low (– or cold), and sleeve is shield. To connect to an unbalanced load con- nect the tip to high (+ or hot), and both the ring and sleeve to shield. Whether these outputs are wired via the patch bay will depend on the specific installation.

Issue 3, May 1997	Model 750 User Guide
Page 14	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.