AUX Output, Configurable Outputs, Setup Direct Output

Model 750

Main Output 3

Main Output 3 has been optimized for connection to devices located external to the vehicle. This “ruggedized,” trans- former-coupled stereo output is select- able, using a front-panel button, for microphone or line level. It is recom- mended that Main Output 3 be wired, via points on the patch bay, to the vehicle’s input/output connector panel. Two 3-pin male XLR-type connectors are used for interconnection. Prepare the mating con- nectors (females) so that pin 2 is high (+ or hot), pin 3 is low (– or cold), and pin 1 is shield.

Main Output 3 was specifically designed to provide a fully-isolated output with good sonic performance. It was NOT designed to drive full level into 600 ohm loads! While a 600 ohm load can be connected without damage, a 2dB level drop should be expected. Used with 2k ohm or greater loads, Main Output 3 will provide its full specified performance.

AUX Output

A stereo output is provided to give access to the Model 750’s AUX audio bus. It is intended that the AUX audio output will be connected to devices within the vehicle.

The electronically-balanced, line-level outputs have a nominal level of +4dBu, and are capable of driving balanced or unbalanced loads of 600 ohms or greater. Two ¼-inch 3-conductor phone jacks used for interconnection. 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 connect the tip to high (+ or hot), and both the ring and sleeve to shield.

Even if there are no immediate plans to connect the AUX audio outputs to external devices, it is recommended that they be terminated on patch points. In this manner they will be accessible for those “one-in-a-million” situations that seem to arise far too frequently!

Configurable Outputs

Each of the four configurable outputs is electronically balanced, has a nominal level of +4dBu, and is capable of driving balanced or unbalanced loads of 600 ohms or greater. The outputs are intended to be used only within the vehicle. DIP switches are associated with each configurable output. Details on using these switches can be found in the Con- figuration section of this guide.

Each of the configurable outputs is acces- sible via a ¼-inch 3-conductor phone jack. 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.

It is highly recommended that the config- urable outputs be routed via the patch bay. Or, if there are no immediate needs for these outputs, be certain to terminate them on the patch bay for future use. Sometime, somewhere, they will get used.

Setup Direct Output

Direct access to the setup section’s voice and tone signals is provided by means of

astereo line-level output. As one of the unique features of the Model 750, it should definitely be utilized! This output is in- tended to be connected to the audio input associated with the video/audio switcher’s

Model 750 User Guide	Issue 3, May 1997
Studio Technologies, Inc.	Page 13

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.