AUDIO GROUND CHASSIS/FLOAT SWITCH

In general, the Audio Ground of each amplifier should be connected to AC mains earth ground AT ONE POINT ONLY- either through the Chassis (by selecting the "Chassis" position) OR through the input cable (with the switch in the "Float" position, and pin 1 of the XLR or the sleeve of the 1/4" connected to the ground of the signal source unit.)

The Chassis/Float switch can be used as a means to troubleshoot ground loop problems, or to verify wiring. Ground loops are characterized by a hum or buzz through the speakers, and occur when multiple paths exist for a given ground circuit. This switch allows the Audio Ground to be temporarily "lifted" or "floated" from the chassis, so continuity tests can be made to verify or reverse-engineer a grounding system. The following information will be useful when planning or troubleshoot- ing system wiring:

•The chassis is permanently connected to the earth (safety) ground pin of the Mains power connector.

•The Audio Ground of each GX2300/GX2600 is permanently connected to the black terminals of both output binding posts, to pin 1 of each XLR input, and to the sleeve of each 1/4" input.

•The XLR shell is permanently connected to chassis.

•With the Chassis/Float switch in the "Chassis" position, the Audio Ground will be connected to the Chassis and AC mains earth ground. This connection is made through a 0Ω resistor (R350) located on the input board. The resistor serves as a fuselink in the case of severe system faults. To check this resistor, remove all connectors from the amplifier and discon- nect the AC main plug. With the switch in the "Chassis" position, use an ohmmeter to measure the 0Ω resistance between the earth ground pin of the AC mains plug and Audio Ground at either black terminal of the output binding posts.

•By selecting the “Float” position, the Audio Ground is not directly connected to the chassis, and can be referenced to some other ground through the input cable or speaker ground. For safety reasons, a 0.1µF capacitor (C125) permanently connects Audio Ground and chassis. C125 is located on the input board. The 0.1µF capacitor couples Audio Ground to chassis at RF frequencies, but only presents approximately 27kΩ of impedance at 60Hz.

OUTPUT

The speaker output connectors are dual binding posts which will accept wire up to 12 AWG, or spade connectors. They are spaced on 3/4" centers for use with dual banana plugs. The positive output red terminals are oriented such that a dual banana plug can be used for bridged mono operation.

!POWER SWITCH

The power switch is located on the front of the amplifier. Two green "Power" LEDs indicate that the corresponding amplifier channel is turned on. Standard practice is to turn the amplifier on last, and off first when powering your system on and off. This insures that any turn on/off glitches in source components or signal processing equipment will occur before the ampli- fier is turned on, or after it is turned off. It is possible to leave the power switch on at all times and switch the amplifier remotely with a breaker switch or other AC power switch. When doing so make sure the switch is rated for the current required by the amplifier.

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Hafler GX2600CE, GX2300CE manual Audio Ground CHASSIS/FLOAT Switch, Output, Power Switch
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GX2600CE, GX2300, GX2600, GX2300CE specifications

The Hafler GX series amplifiers, including the GX2300CE, GX2600, GX2300, and GX2600CE, represent a sophisticated blend of power and precision in audio amplification technology. Designed for both professional and home audio use, these amplifiers deliver high-quality sound reproduction while maintaining reliability and durability.

The GX2300CE and GX2600 are particularly noted for their robust power output. The GX2300CE can produce an impressive output of 125 watts per channel into 8 ohms, making it suitable for driving a wide range of speakers with ease. The GX2600 pushes this power even further, targeting serious audiophiles who demand more dynamics and headroom from their audio systems. With a 220 watts per channel output at 8 ohms, it is built to handle even the most demanding acoustic environments.

One of the standout features of these amplifiers is their use of Hafler's proprietary "Current Feedback" technology. This innovative design allows for greater bandwidth and reduced distortion, ensuring that the audio signal remains true to the original source. The result is a clear, transparent sound that enhances the listening experience. Alongside this technology, the amplifiers come equipped with multiple input options, including XLR and RCA inputs, providing flexibility for various audio sources.

In terms of build quality, the GX series showcases Hafler’s commitment to durability and aesthetics. The rugged chassis is designed not only to withstand the rigors of both studio and stage environments but also to minimize resonance and external vibrations. The front panel is user-friendly, with easily accessible controls for volume and input selection, enhancing convenience in any audio setup.

The GX2300 and GX2600 also feature advanced thermal protection circuitry, preventing overheating and ensuring long-term reliability. This feature is particularly beneficial for extended playback sessions or in high-demand situations when the amplifiers are pushed to their limits.

In conclusion, the Hafler GX2300CE, GX2600, GX2300, and GX2600CE amplifiers are engineered to provide exceptional audio clarity, robust power, and advanced technology. Whether used in a professional studio or a home theater system, these amplifiers stand out for their performance and adaptability, making them a favored choice among audio enthusiasts and professionals alike.
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