Aux, AUX3 Send, Feedback Filter, AUX3 Post

AUX 3

Typically, the AUX3 channel is used as monitor bus. Depending on the setting of the AUX3 POST switch, it is also possible to configure the bus for the connection of an additional, external FX unit.

33. AUX3 SEND

This output is meant for the connection of an external FX unit, a power amplifier or active stage monitor speaker systems, when the AUX3 bus is used for monitoring purposes. Using the AUX3 fader, the output level can be adjusted over a wide range up to +20dBu. The AUX3 send is designed with Ground Sensing technology to prevent the induction of external noise, even when long cables are used.

34. FEEDBACK FILTER

The feedback filter is a very narrow band notch filter which is only active over a range that is extremely susceptible to acoustical feedback. The frequency band is set using the corresponding rotary control. The filter is activated by pressing the corresponding ON switch. Acoustical feedback occurs when the sound system becomes the largest acoustical source at a microphone. Or in other words: the speaker signal hits the microphone and gets amplified again and again, resulting in escalating oscillation, and is audible as a high pitched whistle or loud humming sound. The following guidelines are meant to assist you in avoiding feedback and you should take them into consideration even before you activate the feedback filter.

1.Do not position the main speaker systems behind the microphones.

2.Turn off all unused microphones.

3.Also consider the microphones’ different polar patterns and characteristics, when placing the monitor speakers.

4.Do not turn up the monitor system’s volume higher than really necessary.

5.Try to avoid extensive equalization on channels that you want to include in your monitor mix.

6.Keep in mind, that microphones “behave” different when somebody stands right in front of them. In fact, the amount and intensity of first reflections changes things drastically.

7.Position the microphones as close as possible to the sound source.

If you still need more volume from the monitor system, after trying the above mentioned precautions, you can use the feedback filter to notch the frequency that tends to affect feedback the most. Therefore, you need to perform the following steps:

Increase the AUX3 (monitor) level until the point where feedback starts. The “sound” you hear is generated within the system. Turn on the feedback filter and adjust the rotary control at the point where the “ringing” disappears. Switching the filter on and off lets you easily check if you tuned in the correct frequency. The feedback filter attenuates the corresponding frequency band by about 9dB. Since the filtered band is extremely narrow, an alteration in the sound of your monitor system is hardly audible.

CAUTION: Please be extremely careful when you increase the level up to the feedback limit. Careless operation, resulting in feedback at high SPL, can severely damage your speaker systems and – even more important – the human ear.

35. AUX3 POST

As mentioned before, this switch determines if the AUX3-mix signal is PRE or POST FADER. When the switch is engaged and the yellow LED lights, the signals of all AUX3 controls in the input channels are sent after their corresponding channel faders.

36. PFL

With this button you can route the pre-fader AUX3 signal to the headphones bus. The signal is outputted via the headphone output. The setting of the AUX3 fader is not relevant for the signal’s volume (PRE FADER LISTEN), leaving you with the opportunity to adjust its level and equalization without the need to route it to the AUX3 SEND bus.

37. AUX3 VOLUME

This fader controls the AUX3 SEND output level. When the AUX3 bus is used for monitoring, this fader lets you control the volume of the monitor system.

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PSX1600, PSX1000, PSX2200 specifications

Electro-Voice, a prominent name in professional audio equipment, has developed a series of high-performance power amplifiers known as the PSX series, which includes the PSX2200, PSX1000, and PSX1600 models. These amplifiers are engineered to deliver exceptional power, clarity, and reliability, making them suitable for a variety of applications such as live sound, installations, and portable use.

The PSX2200 is the most powerful model in the PSX lineup, offering a robust output of 2,200 watts at 4 ohms. This amplifier is designed to handle demanding audio environments, providing headroom and performance necessary for large audiences. One of its key features is the Peak х-Over Limiting technology, which ensures that the amplifier delivers maximum power without distortion during peak performance. Additionally, the PSX2200 is equipped with built-in high-pass and low-pass filters, allowing users to tailor the sound to their specific needs.

The PSX1000 represents a mid-range option that still packs a punch, delivering 1,000 watts at 4 ohms. It is designed for versatility, making it ideal for a range of sound reinforcement applications. One standout feature of the PSX1000 is its Intelligent Clip Limiting system, which automatically adjusts the input signal to prevent clipping and maintain audio clarity. Moreover, the amplifier features a rugged chassis and intuitive interface, which enhances both durability and ease of use in various settings.

The PSX1600 serves as a bridge between the PSX1000 and PSX2200, offering 1,600 watts at 4 ohms. It incorporates advanced thermal management technology, ensuring stable performance even under demanding conditions. The PSX1600 is engineered for reliability, featuring extensive protection circuitry that safeguards against issues like over-temperature, short circuits, and signal overloads. This amplifier is particularly favored for its ability to maintain sound quality during prolonged use.

All three models in the PSX series share common characteristics such as a lightweight design, durable construction, and efficient power supply systems, making them highly portable and easy to integrate into existing sound systems. The PSX amplifiers are also equipped with comprehensive monitoring capabilities, including LED indicators that provide visual feedback on power and operational status.

In summary, the Electro-Voice PSX2200, PSX1000, and PSX1600 represent a powerful trio of amplifiers that offer versatility and reliability for professional audio applications. With their advanced technologies, user-friendly features, and impressive performance specifications, these amplifiers are well-suited to meet the demands of sound engineers and audio professionals alike.