Practical Operating Tips

Model 750

Now that we’ve reviewed all the sections that comprise the Model 750, it’s time to actually use the unit. In the following paragraphs some suggestions about how to best use the Model 750 are provided.

Setting the Bus Operating Levels

The main and AUX master level controls allow the overall gain structure of the audio mixing buses to be set. Correctly setting these controls ensures that maxi- mum audio quality will be achieved. In most cases simply setting the controls to the unity gain position is appropriate; the unity gain position is clearly marked on the front panel. If you are a fanatic for accuracy, you may want set the level controls “precisely” using the following procedure:

1.On the setup section, set the single tone button to the on (in) position. This will cause a 400Hz or 1kHz steady tone to be generated.

2.On the setup section, place the main bus assignment button to the on (in) position; the AUX bus assignment button must be in the off (out) position.

3.Set the meter source button to the monitor (in) position.

4.Set the monitor source button to main stereo.

5.Adjust the main master level controls so that the meters “read” 0 VU. The main bus is now set for precisely unity gain.

6.On the setup section, place the main bus assignment button to the off (out) position and the AUX bus assignment button to the on (in) position.

7.If the AUX interrupt function becomes active (due to configuration DIP switches 6 and/or 7 being set to their on (up) position) the meters are now monitoring the AUX bus. If the AUX interrupt function is not active, set the monitor source to AUX.

8.Adjust the AUX master level controls so that the meters “read” 0 VU. The AUX bus is now set for precisely unity gain.

9.The procedure has now been com- pleted. Return the buttons on the setup and monitor sections to the desired operating setting.

Signal Present/Peak LEDs

Bi-color status LEDs are provided on the mic/line and stereo line input sections. Under normal operating conditions the LEDs should light only with the color green. Signal peaks may cause an occa- sional red flash, but sustained lighting of the peak indicator means that audio per- formance is being compromised. Adjust the level controls so that you aren’t “in the red” except on rare occasions.

Limiter/Compressors

While the Model 750 was designed to provides lots of signal “headroom,” most applications, especially broadcast, won’t benefit from it. In fact, wide dynamic range, in many cases, will simply tax the transmission chain and lead to signal degradation. Our feeling is that leaving the limiter/compressor button to the on (in) state is your best bet. If you can’t think of a good reason why extended dynamic range is desired, leave the limiter/com- pressors active!

Model 750 User Guide	Issue 3, May 1997
Studio Technologies, Inc.	Page 35

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.