Audio Ground CHASSIS/FLOAT Switch, Output

adapter plug for a two wire receptacle. The AC mains fuse is accessible at the rear panel of the amplifier. If this fuse blows replace it only with the same type and rating fuse. The correct replacement fuse value is printed on the rear of the amplifier, and on the specifications page.

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 conected to the earth (safety) ground pin of the Mains power connector.

•The Audio Ground of each SR2300/SR2600 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 0.1uF capacitor (C125) permanently

connects Audio Ground to chassis at RF frequencies, but only presents 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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SR2600, SR2300 specifications

The Hafler SR2300 and SR2600 are high-performance power amplifiers designed for audio enthusiasts seeking to elevate their listening experience. These models are renowned for their remarkable sound quality, powerful performance, and innovative technologies, making them ideal for both home audio systems and professional applications.

Starting with the Hafler SR2300, this amplifier is a two-channel powerhouse capable of delivering up to 150 watts per channel at 8 ohms, and 225 watts per channel at 4 ohms. One of the key features of the SR2300 is its Class AB design, which strikes an optimal balance between efficiency and sound fidelity. The design minimizes distortion, allowing for clear and precise audio reproduction across a wide frequency range. The amplifier also boasts a frequency response of 20 Hz to 20 kHz, ensuring that both low and high frequencies are accurately represented.

The SR2300 is equipped with a high-performance, toroidal power transformer, which enhances its ability to deliver a stable power supply to the output stages, resulting in improved dynamic range and transient response. Additionally, the SR2300 features comprehensive protection circuitry, safeguarding the amplifier from overheating and short circuits, ensuring reliable operation even under demanding conditions.

In contrast, the Hafler SR2600 offers even more power and versatility, pushing out up to 250 watts per channel at 8 ohms and 400 watts at 4 ohms. This model maintains the same renowned Class AB architecture as the SR2300 but integrates additional features such as a balanced XLR input for enhanced connectivity and reduced noise, which is invaluable in professional audio settings. The SR2600 also incorporates advanced thermal management systems, allowing it to operate efficiently even during prolonged use at higher output levels.

Both models come with customizable gain control options, allowing users to tailor the output to their specific needs. Whether being used to drive high-efficiency speakers in a home theater setup or powering professional studio monitors, the Hafler SR2300 and SR2600 deliver rich, detailed sound that remains consistent across various listening environments.

In summary, the Hafler SR2300 and SR2600 stand out in the audio amplifier market with their robust design, high power output, and advanced technologies that prioritize sound quality and reliability. These amplifiers continue to be favored choices for both audiophiles and professionals, ensuring an engaging and immersive audio experience.