Operation

Power Switch

The POWER switch applies power to the unit. The switch will illuminate when power is on.

The rear panel AX adjustment controls the mix of the Aphex effect with the audio signal. Counterclockwise rotation of the control minimizes the Aphex effect. Clockwise rotation of the control maxi- mizes the Aphex effect.

Individual Volume

Controls

Each input is controlled by an individual volume con- trol.

The overall volume is controlled by the

MASTER control.

Lo-Cut Filter

The Lo-Cut filter on the rear panel provides 3dB attenuation @ 65Hz on the microphone inputs. This helps reduce mic breath pop, wind noise and rumble.

Contour Pushbutton Switch

This switch enables or bypasses the variable loudness contour. This feature only effects the Aux inputs.

This feature is designed to improve richness of sound by restoring the high and low frequencies that the ear is insensitive to at low volume levels. The effect dimin- ishes as volume is increased.

Aphex Aural Exciter

The front panel APHEX AURAL EXCITER pushbutton enables or bypasses the Aphex Aural Exciter feature. This feature effects all inputs when enabled.

This audio enhancement system recreates the pres- ence and realism that is lost in the audio amplification process, by regenerating the harmonics usually lost through amplification. This results in increased pres- ence and clarity, increased intelligibility, greater per- ceived loudness (without adding extra power), and reduced listener fatigue.

Dual Function Acoustic Equalizer

The unique dual-function equalizer can be used for acoustic shaping or for feedback control.

Note: When the switch is placed in the OUT posi- tion, the equalizer is bypassed for a flat response.

Acoustic Shaping Mode

When the switch is set in the ACOUSTIC EQ position, full range equalization (10 bands on 1 octave centers starting at 62.5Hz) is provided with a boost/cut of 12dB. In this mode, the equalizer can be used to com- pensate for room acoustics, or to satisfy the listening preference of the user.

Feedback Control Mode

When the switch is placed in the FEEDBACK CON- TROL position, the equalizer can be used to reduce feedback and increase the effective gain of the sys- tem.

In feedback control mode the equalizer provides increased control of frequencies between 125Hz and 8KHz. The 10 bands are located on 2/3 octave cen- ters with 12dB cut/boost on each band.

GS-35, GS-250, GS-100, GS-60, GS-150 specifications

The Bogen GS series offers a variety of versatile and efficient amplifiers tailored for different audio applications. Among the models in the series are the GS-250, GS-100, GS-35, GS-150, and GS-60, each providing unique features suited for various environments, such as schools, auditoriums, and commercial settings.

The Bogen GS-250 is a robust amplifier, delivering a powerful output of 250 watts. Its key feature is its built-in 5-input mixing capability, allowing for seamless integration of multiple audio sources. The GS-250 incorporates advanced thermal protection and a low-impedance output, ensuring reliable performance even under strenuous conditions. This model also supports both 70V and 4Ω speaker configurations, making it adaptable for a wide range of installations.

Next in the lineup is the GS-100, which outputs 100 watts and is designed for medium-sized venues. It features a straightforward front-panel interface with volume controls and indicator lights for easy operation. The GS-100 is equipped with two auxiliary inputs, enabling users to connect additional devices, such as microphones or digital audio players, while its built-in paging capabilities make it suitable for announcements in public spaces.

The GS-35 is a compact model with a 35-watt output, ideal for small rooms or personal use. This amplifier includes a single microphone input with an adjustable volume control, making it user-friendly for educational settings or small business environments. Its lightweight design allows for easy transportation and installation, offering a practical solution for localized sound needs.

For slightly larger applications, the GS-150 offers 150 watts of power. This model is equipped with multiple inputs, including dedicated microphone and auxiliary options. An important feature of the GS-150 is its user-adjustable tone control, providing flexibility to tailor sound quality based on the acoustics of the environment. Additionally, it supports both high-impedance and low-impedance systems.

Finally, the GS-60 rounds out the series with its 60-watt output, perfect for smaller venues. It boasts a simple setup with an intuitive interface, catering to users who may not be audio professionals. The GS-60 combines affordability with quality sound reproduction, making it a popular choice for businesses looking to enhance their audio capabilities without breaking the bank.

In summary, the Bogen GS series offers a comprehensive range of amplifiers that cater to various needs, characterized by robust power outputs, multiple input options, and user-friendly interfaces. Each model is designed with reliability in mind, ensuring consistent performance in diverse audio environments.