NOTICE: Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing. However, information is subject to change. WARNING: To reduce the risk of Fire or Electric Shock, Do Not Expose this apparatus to rain or moisture.
Introduction The Bogen Gold Seal Series amplifiers were designed with the sound contractor in mind. They provide unparalleled flexibility and versatility, without the need for add-on modules. Unlike other typical amplifier lines, the professional sound contractor need not purchase a higher-powered amplifier just to get more extensive features or flexibility.
Panel Descriptions Front Panel (All Models) 1. MIC 1 to 4 - Individual level controls for dedicated microphone inputs. 2. MIC 5/TEL - Individual level control for MIC 5 or TEL input depending on input mode selected. 3. MIC 6/AUX 1 - Individual level control for MIC 6 or AUX 1 input depending on input mode selected.
9. MIC 5/TEL - Switch selects mode of operation for MIC 5/TEL input. 10. REMOTE MSTR - Screw terminal pair for connection of remote master volume control (Bogen model GSRVC). 11. MIC/AUX/TEL PRECEDENCE - Screw terminal connections that allow externally controlled muting of individual inputs.
Panel Descriptions Rear Panel (GS250) 16 17 18 16. AE - Variable control for adjusting the amount of Audio Enhancement effect. 17. ALC - Variable control to adjust the amount of Automatic Level Control applied to the TEL input (works only in the TEL input mode). 18.
Input Connections Installation Note Keep input leads away from the output leads and AC power cables. Unless the driving source provides a low-imped- ance output, keep the input lead under ten feet in length. Make all connections to the unit with the POWER switch in the OFF position.
MIC 5 and MIC 6 Remote Volume Control (Rear Panel; #10) If remote volume control is desired, connect the Bogen acces- sory GSRVC Remote Volume Control to the screw terminals marked REMOTE MSTR. Wire length can be up to 1000 feet using 22-gauge wire.
GND/COM shorting clip should remain in place. WMT1A (Rear Panel; #2) This RCA output jack, when used with a Bogen WMT1A Line- Matching Transformer accessory provides a 600-ohm output to feed a remote amplifier or a telephone line. Refer to the instructions pro- vided with the WMT1A accessory for connection information.
Operation Power Switch (Front Panel; #10) The POWER switch applies power to the unit. The switch will illuminate when power is on. Individual Volume Controls (Front Panel; #1) Each input is controlled by an individual volume control. Master Volume Control (Front Panel;...
Operation Dual-Function Acoustic Equalizer (Front Panel; #6) The unique dual-function equalizer can be used for acoustic shaping or for feedback control. Note: When the switch is placed in the OUT position, 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 62.5 Hz) is provided with a boost/cut of 12 dB.
Operation Telephone Paging Controls & Settings The MIC 5/TEL volume control on the front panel controls the volume of the telephone paging input when the control is set to the TEL mode (See page 9 for information on setting the TEL input mode). The TEL input mode uses voice-activated muting for the AUX inputs and automatic level control for providing constant paging level.
Troubleshooting Amplifier will not turn ON. On the GS35, GS60, GS100 and GS150, depress the circuit breaker reset button. On the GS250, check the fuse. Replace fuse only with same type and rating. No output on 70V, 25 VCT, or 25V. Check that the LINK switch on the rear panel is in the IN position or external signal-processing equipment, if used, is functioning and connected properly.
Bogen's Gold Seal Series amplifiers are warranted to be free from defects in material or workmanship for three (3) years from the date of sale to the original purchaser. Any part of any Bogen product covered by this warranty that, with nor- mal installation and use, becomes defective (as confirmed by Bogen upon inspection) during the applicable warranty period, will be repaired or replaced by Bogen, at Bogenʼs option, provided the product is shipped insured and prepaid to: Bogen Factory...