User manual ADCOM GFA-6006

[. . . ] GFA-6002 & GFA-6006 Custom Install Power Amplifiers ch 1 distorti on alert < on / standb y therma l protect ion > > ch 2 ch 3 ch 4 ch 5 ch 6 G F A 60 06 ADCOM GFA-6006/02 Owner's Manual | 1 WELCOME Dear Fellow ADCOM Product Owner, Welcome to the ADCOM family!For more than twenty years, ADCOM products have delivered excellent performance and value for customers around the world. Our products are designed by our experienced and demanding engineering team, built to the highest standards in our factory, and sold and serviced through dealers, custom installers, and other retailers whose primary goal is your complete satisfaction. We know you are anxious to hear your new power amplifier in action, but please take a few minutes to read this owner's manual before connecting the power amplifier to your system. [. . . ] Sometimes, when the amplifier is in use, the LEDs may occasionally flicker during high volume listening, particularly if you are driving [2] Thermal Protection The GFA-6002/6006 are provided with a thermal protection circuit which will shut down the individual amplifiers if its heatsink temperature reaches 85°C. The Thermal Protection LEDs will light whenever the thermal protection circuit in its respective channel has been triggered and the amplifier is inoperative. The thermal protection circuitry will typically be triggered by very high power demands into impedances much lower than the amplifier is capable of driving 1 If, for example, one of the Thermal Protection LEDs glows, that amplifier channel will not produce sound even though the Power LED may still glow. Additionally, the internal power transformer is provided with a thermostat which will interrupt power into the transformer if its temperature exceeds 125°C. This high temperature will seldom, if ever, be encountered unless the amplifier is subjected to abnormal conditions, such as operation into loads of less than 3 ohms at very high listening levels. If the AC Fuse has not failed, the Power LED is out, and the Thermal Protection LED does not glow, 2 3 low impedances. This flickering is no cause for concern. The LEDs are simply warning you that the amplifier is approaching its maximum power output into the particular loudspeakers you are using. If, however, the Distortion Alert LEDs glow brightly or are illuminated most of the time during playback, you are over driving the amplifier and should turn down your volume control to reduce the listening level. Otherwise, it may cause the Thermal Protection to be activated or, in extreme cases, damage your loudspeakers. at those levels. If any amplifier channel's output through the loudspeaker(s) ceases abruptly and its Thermal Protection LED glows, you will know that its heatsink temperature has become unacceptably high and the circuitry is protecting the amplification devices. Please note that the Power LED will remain on and the amplifier will still be energized. Once the temperature of the heatsink(s) drops to a safe operating level, that amplifier will automatically resume operation. Activation of the Thermal Protection circuitry in any of the channels of amplification in the GFA-6002/6006 is an indication that the amplifier has 8 | ADCOM GFA-6006/02 Owner's Manual GFA-6006 Rear Panel 4 GFA-6002 Rear Panel 8 5 6 7 9 10 11 1 Description of Unit: Rear Panel [4] Inputs & [5] Outputs The audio inputs and outputs for the GFA-6002 and GFA-6006 are through high-quality, gold-plated RCA jacks to minimize high-frequency losses, noise, etc. They will accept standard RCA-type plugs, one for each of the channels. To insure that the performance designed into the amplifier is preserved, you should use the highest quality audio cables possible. The GFA-6002 and 6006 feature inputs and outputs for each channel to allow "daisy-chaining" of channels or additional amplifiers in an installation. To direct signal from one channel to another, connect an appropriate cable (RCA to RCA, male to male) from the output of one channel to the input of the desired channel. In bridged operation (see Bridged Operation) only the Bridged Mono Input is to be used. On the GFA-6006, bridged mono inputs are channels 1, 3, and 5. On the GFA-6002, bridged mono input is channel 1. For "daisy-chaining" the corresponding outputs for these channels are active. are effective (see BRIDGED OPERATION for more details). [7] Amplifier Outputs The GFA-6006/6002's connections to the loudspeakers are made through high-grade, 5-way, binding post terminals. There are two terminals for each speaker, which are colored RED for the positive (+) output and BLACK for the negative (-) output. [. . . ] IM Distortion (SMPTE) 1 watt to 70 watts into 8 ohms. 0. 05% IM Distortion (CCIF, Any Combination from 4kHz to 20kHz) 70 watts into 8 ohms. 0. 01% Frequency Response @ 1 Watt into 8 Ohms 10Hz to 20kHz. 5Hz to 130kHz Dynamic Headroom Into 4 Ohms. [. . . ]