FLOATED EQUIPMENT

Units with a 2-pin mains power cord have no means to connect the audio output ground to earth ground, so usually the audio output ground is floated from earth ground. However, this does not insure that when installed in a system, the audio output ground will remain floated from earth ground. The input cable to this equipment may already be connected to earth ground earlier in the audio chain, and it will typically be carried straight through to the output. It is also possible that the audio output ground connects to the earth ground through the chassis to an earth-grounded rack. The only way to know for sure is to test the installed system. Use an ohmmeter to check for continuity between the earth ground socket of the mains power receptacle and the audio output ground. If the audio output ground is not connected to earth ground, it is floated

equipment.

Consult the following diagrams for examples of recommended wiring techniques:

FLOATED,

 

XLR, 1/4" TRS Amplifier

SHIELDED TWISTED PAIR

2

BALANCED

 

 

3

SOURCE

 

 

 

 

 

1

 

shield connected at both ends

Shield

FLOATED,

 

XLR, 1/4" TRS Amplifier

SHIELDED TWISTED PAIR

2

UNBALANCED

 

 

3

 

 

SOURCE

1

Audio

Ground

Chassis

Audio

Ground

FLOATED, UNBALANCED SOURCE

shield connected at both ends

 

Shield

 

 

 

XLR, 1/4" Mono Amplifier

COAX OR TWISTED PAIR

 

2

 

 

 

 

 

3

 

 

Shield

1

 

 

 

 

 

1/4" Mono: sleeve shorts

 

 

 

— input to Audio Ground;

 

 

XLR: short pins 1 & 3 together

 

Chassis

Audio

Ground

Chassis

The output XLR jack accepts a female XLR plug and provides a hard-wired pass-through of all 3 pins of the input jack.

DELAY

(One of these switches must be selected. If all the switches are OFF, there will be no output signal.)

The delay feature provides five sections of 2nd-order all-pass delay filters of 450µsec +/-10µsec each. Unlike the more commonly used 1st-order all-pass, the 2nd-order filters achieve a constant delay time over the usable frequency range of 1Hz to 1kHz. At frequencies higher than 1kHz, the gain remains flat, while the delay time gradu- ally decreases to zero.

The delay time is labeled in inches of delay (i.e. 450µsec/section X 1130ft/sec X 12 inches/ft = 6 inches/section). If there is uncertainty about the amount of delay needed, choose the 0” switch.

CROSSOVER

A 3-position slide switch selects the High-Pass (HP), Low-Pass (LP), or Full-Range (Full) configuration of the 4th-order crossover.

FREQUENCY

The crossover frequency can be selected as either 500Hz or 800Hz.

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Hafler GX2800CE manual Floated Equipment, Delay, Crossover, Frequency

GX2800, GX2800CE specifications

The Hafler GX2800CE and GX2800 are high-performance power amplifiers designed for audiophiles and professional sound reinforcement applications. Renowned for their reliability and audio fidelity, these models represent a seamless combination of innovative technologies and robust engineering that ensures impeccable sound quality.

One of the standout features of the Hafler GX2800 series is their high current output capability. This allows the amplifiers to drive a wide variety of loudspeakers, including those with demanding impedance requirements. With a power output of 280 watts per channel at 4 ohms, these amplifiers deliver sufficient power for large venues while maintaining clarity and dynamic range. The ability to handle low impedance loads without compromising performance is a hallmark of the Hafler brand.

The GX2800CE and GX2800 are equipped with Hafler's proprietary feedback technology, reducing distortion and enhancing overall sound quality. This technology ensures that the amplifiers perform well across the audio spectrum, allowing for rich, detailed sound reproduction. The low total harmonic distortion (THD) figures also contribute to a cleaner audio signal, ensuring that the listener experiences music as it was intended.

Another notable characteristic of the GX2800 series is its built-in protection circuitry. This includes short-circuit protection, thermal overload protection, and output DC protection, which work together to safeguard the amplifier and connected speakers during operation. The durable design of the chassis provides further reliability, suitable for both studio environments and live sound applications.

The amplifiers feature balanced XLR and unbalanced RCA inputs, providing versatility for various audio setups. Additionally, the rear panel includes binding post speaker outputs for secure connections to loudspeakers.

For those seeking a powerful and reliable amplifier that does not compromise on audio quality, the Hafler GX2800CE and GX2800 are exceptional choices. With their array of features designed to enhance performance and user experience, these amplifiers stand out in the competitive audio equipment market, making them ideal for both home and professional uses. Whether you are mixing in the studio or providing sound for a live performance, the Hafler GX2800CE and GX2800 will deliver exceptional results, making them a worthy investment for any audio enthusiast.