Hafler GX2800CE manual Installation, Cooling, POWER/THERMAL Requirements, Noise, AC Line

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Installation

The GX2800 is a standard 2U (2 rack height) 19" rack-mount unit, with both front and rear rack mounting ears. In portable systems, the amplifier must be supported at both the front and rear.

!COOLING

The GX2800 uses forced-air cooling (fan cooling) to remove the heat produced during normal operation. Free air flow at the mounting location is a critical factor in accomplishing long-term reliable operation of the amplifier. Maximum operating ambient temperature is 40°. The internal fans of the amplifier pull in fresh (cool) air from the rear panel, and force the heat- ed air out the front panel. This air flow must be as open and free of obstructions as possible. Also take care to exhaust the heated air away from the front panel intakes, so as not to recirculate and reheat the same air over and over again. In a rack system, make sure there is a significant source of fresh air to the rack. This can be achieved with air conditioning vents to the top of the rack, an open back that is well ventilated, or rack panel fans/vents. In the case of rack panel fans/vents, the cooling will be most effective when the amplifier(s) are located as far away from the fans/vents as possible, to prevent air recirculation i.e. amplifiers at the bottom, fans/vents at top. Allow a minimum of 3” clearance in the front and back of the amplifier for adequate ventilation. When installing equipment in a rack, take care that the weight is distributed evenly. Hazardous conditions may be created by uneven weight distribution.

POWER/THERMAL REQUIREMENTS

For your convenience in planning for sufficient power and cooling in the amplifier environment, we have included AC mains current draw and thermal dissipation values in the Specifications Sheet. The specifications listed are for idle (no sig- nal), 1/8th power (“normal operating conditions” for continuous voice or music), and 1/3rd power (worst-case hard-clipped music) for an amplifier with both channels driven. The thermal dissipation specifications indicate how much heat will have to be removed from the amplifier environment under the three different conditions.

NOISE

The GX2800 exceeds all relevant international emissions and immunity standards, and has further been specifically designed to minimize interference in Pro-Audio environments. Regardless of this fact, amplifiers consume, process and deliver significant amounts of power over a wide frequency range. Standard practice calls for caution to be exercised in the placement of signal cables and signal-level components such as mic preamps, tuners, etc., to avoid inducing noise in the low level circuitry. Possible sources of noise are: AC current in shared power lines, magnetic interference between adjacent rack-mount units, high current audio speaker cables. In general:

Avoid:

Mounting sensitive signal processing equipment directly above or below amplifiers.

Sharing AC power outlets between amplifiers and signal processing equipment.

Bundling signal cables with speaker cables or AC power cords.

!AC LINE

Connect the unit to a properly rated supply circuit. The GX2800 can be configured to operate within the following AC

mains voltage ranges:

100-140VAC, 50-60Hz (115VAC, 60Hz typ.)

200-265VAC, 50-60Hz (230VAC, 50Hz typ.)

Connection is made by 14 gauge, IEC type 320, grounded line cord. For safety considerations only a properly grounded (earthed) receptacle should be used. If a grounded circuit is not available, do not break off the ground pin; use the proper 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.

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Contents Page Declaration of Conformity Table of Contents Power Cord Grounding Power SourcesPower Cord Protection CleaningCuadros DE Advertencias LEA LAS InstruccionesConserve EL Manual DEL Propietario Siga LAS InstruccionesInstruktionen Lesen Erforderlicher ReparaturserviceService Betriebsanleitung AufbewahrenConserver LE Guide DE Lutilisateur Suivre LE Mode EemploiLire LES Instructions Considérations DE Mise EN GardeAvvertenze Leggete LE IstruzioniConservate IL Manuale Seguire LE IstruzioniSpecifications Introduction Technical Design FeaturesWHY a NEW Amplifier TOPOLOGY? What Else Distinguishes These AMPLIFIERS?Universal Line Voltage Input Protection CircuitsDesign Features GX2800 Level Controls Adjusts the gain of the amplifierDesign Features GX2800CE Cooling InstallationPOWER/THERMAL Requirements NoiseOutput Audio Ground CHASSIS/FLOAT SwitchPower Switch Daisy Chain Output OperationInput Earth Grounded Source EquipmentCrossover DelayFloated Equipment FrequencySTEREO/MONO 70V 100V Switch PhaseBIAMP/STEREO Switch CD Horn EqualizationProtect Load SwitchSignal ThermalBiamp Mode Wiring DiagramsStereo Mode Connector WiringConnector Wiring Connect to CH a output Bridge Mono Mode70V Mono Mode 100V Mono Mode 70V Stereo ModeService Policy and Limited Warranty What is CoveredMAN-3643-A 01 BM

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.
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