Classe Audio CP-500 owner manual There is a hum coming out of the speakers

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5.There is a hum coming out of the speakers.

•If you are running single-ended interconnects, make sure they are not running alongside any AC power cords.

•If you are running single-ended interconnects, make sure they are not too long. Long runs of single-ended interconnects have a natural tendency to pick up noise even if they are shielded.

•If any source components connected to your preamplifier has a cable TV hooked up to it, try disconnecting the cable television line from the source. If the hum goes away, you will need an isolation device between your cable and that particular source. Refer to your Classé dealer for one of these inexpensive devices.

•If you have the optional phono module in your preamplifier, make sure that the ground wire of the tonearm is secured properly to the ground lug on the back of your preamp.

•If the hum exists only on the phono input, make sure the turntable/tonearm assembly is not too close to other components. There should be at least 12 inches (30cm) clearance from the other components. The more clearance you provide, the better (as long as the tonearm cable is not stretching).

•Make sure the tonearm cable is not touching or running alongside an AC cable.

•Make sure you have the proper loading for your phono cartridge. If you are in doubt, consult your authorized Classé dealer.

6.There is a mechanical hum coming from the unit.

•This symptom suggests you have a lot of electrical noise on your AC mains line. Try connecting to another AC circuit (not merely a different plug, but a different circuit).

•Check to see if you have any halogen lighting or dimmers on the same circuit as the preamplifier, as they can be the cause of hum in power supply transformers.

7.There is a noticeable change in volume between one input and another, even though the volume was not adjusted.

•You may need to adjust the input offset setting to compensate for differences in output level between source components. Conversely, the input offset setting may have been adjusted inappropriately. Either way, you can correct the problem by going to the following location in the menu system:

Menu ➝ system setup ➝ input ➝ input name ➝ offset where input name is the input which needs to be adjusted.

•If the input that seems incorrect is the phono input, make sure you are using the proper gain setting for the type of cartridge you are using. If in doubt, consult with your authorized Classé dealer.

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Contents CP-500 Preamplifier Page Important Safety Instructions Contents Word about installation Welcome to the Classé familyUnpacking and Placement Placement Ventilation Custom installations Serial numberOperating voltage Warm up/break-in period Please read this manual… Special Design Features Extensive listening tests Extraordinary longevity Standby button & LED indicator Front PanelMute button Menu buttonLCD touchscreen IR windowVolume Knob Single-ended RCA inputs Rear PanelTape Input Ground terminalTape output Balanced XLR inputsSingle-ended RCA main outputs Balanced XLR main outputs Classé can Bus Control Ports RS-232 Control PortIR Input and Output DC Trigger Input and Output AC Mains Power SwitchAC Mains Input Input Selection and Volume Remote ControlBasic Functions Navigation Keys Fkey ControlsMenu System Operational menuMain menu system System setup Rotary Page Input Page Phono gain Triggers Max volume Teach IR Display setup Main balance Remote Fkeys Status Version info SensorsEverything appears to be on, but there is no sound TroubleshootingThere is no sound and the Standby LED is not lit IR remote control seems not to function Only one speaker seems to be playingThere is a hum coming out of the speakers There is a mechanical hum coming from the unitCare and Maintenance Cleaning the cabinetSpecifications Dimensions V2.5 080906

CP-500 specifications

The Classe Audio CP-500 is a high-performance stereo preamplifier that has become a staple in the audiophile community due to its impressive sound quality and innovative design. This preamp is crafted with meticulous attention to detail, aimed at delivering pure audio fidelity and an immersive listening experience.

One of the standout features of the CP-500 is its lightweight yet robust chassis, which is designed to minimize resonance and interference, ensuring that the signal path remains clean. The unit incorporates a sophisticated custom power supply that provides stable and reliable energy, reducing noise and enhancing overall performance.

At the heart of the CP-500's design is its high-quality analog signal path. The preamplifier uses high-grade components, including premium capacitors and resistors, to retain the integrity of the audio signal. This design philosophy is reflected in the preamp's exceptional frequency response and low total harmonic distortion (THD), making it a superb choice for discerning listeners who demand the best from their audio systems.

The CP-500 also features balanced and unbalanced inputs and outputs, providing flexibility for various system configurations. The inclusion of both XLR and RCA connectivity allows users to seamlessly integrate the preamp into their setups, whether they use studio-grade equipment or home audio devices. Additionally, it supports multiple source inputs, making it versatile for any audio collection.

Another notable characteristic is the preamp's intuitive user interface. The front panel includes a clear display and ergonomically placed controls, making it easy to navigate through various settings and source choices. The remote control adds convenience, allowing users to adjust volume levels and switch inputs from anywhere in the listening environment.

Classe Audio places a strong emphasis on compatibility, particularly with their amplifiers, ensuring that the CP-500 works harmoniously with their line of high-performance power amplifiers. This synergy allows for an optimal audio experience, highlighting the capabilities of both the preamp and amplifier, resulting in sound that is both dynamic and nuanced.

In conclusion, the Classe Audio CP-500 preamplifier is a prime example of high-fidelity audio engineering. Its combination of superior build quality, advanced technology, and elegant design makes it an excellent choice for audiophiles seeking to elevate their sound systems. Whether used for critical listening or simply enjoying music, the CP-500 delivers an exquisite sonic experience that stands the test of time.
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