Operating Manual - FTX-1001, FTX-1501, FTX-2001, CFT-1800 Power Amplifier

11.TROUBLESHOOTING TIPS

11.1No Audio Output

Power switch not lit:

Line fuse is blown or power outlet is dead.

IF LINE FUSE IS BLOWN, REPLACE ONLY WITH SAME TYPE AND RATING FUSE.

Power switch is lit but thermal status LEDs are off:

Amp is in thermal protect mode. Power has been removed from the audio section until the amplifier returns to a normal temperature.

Power and Thermal Status are lit but Output Level Meters are not responding:

There is no input signal applied or input level controls are off. Note: In parallel mono mode, be sure that only one signal source is connected to the amp.

Protect LED is lit and relay clicking is heard:

Output is short circuited or load impedance is too low. Check speaker cables for shorts, increase load impedance by disconnecting some speakers.

A high frequency oscillation in the sound system is occuring when the relays close. Turn down the input level controls to verify that the amplifier alone is not causing the problem.

Be sure to use good quality shielded and balanced input cables. Do not run input cables alongside output speaker wires over long lengths (ie. through the same conduit).

Protect LED is lit, Clip LED comes on as soon as signal is applied:

DC voltage may be present on the output or an internal slow acting protection fuse may have blown. Have a qualified technician replace the fuse with the same type fuse.

11.2Distorted Sound

Output level meters indicate 0dB level (red CLIP LED on):

Amplifier is being clipped. Reduce the signal level at the signal source.

0 dB level on output meters is never reached:

Applied input signal is distorted before it gets to the amp. Check to see if a piece of equipment in the signal chain before the amp is clipping. Normally the amplifier should be operated with input levels fully CW to maximize headroom in the signal source. Also check for damaged speaker drivers that could cause distorted sound.

If distorted sound is still heard, there may be an internal problem. Call Ashly Audio service department at 800-828-6308.

11.3Hum or Buzz Noise

Be sure that the power cord’s 3-prong plug is con- nected to a properly earth-grounded outlet. Lifting the grounding third prong usually does not improve hum or buzz and creates a potential electrical shock hazard.

Use balanced input connections with a balanced audio source for best hum and buzz rejection. See sec- tion 7.1 on inputs.

Normally the ground lift strap on the input screw terminals should be left in place for best ground voltage suppression. In some cases hum or buzz noise may be induced by excessive ground current through the input ground connection. This current path may be interrupted by removing the ground lift strap. If the problem per- sists, input signal transformers providing complete ground isolation are available. See section 8.1 on Input Isola- tion Transformer.

Buzz noise can be caused by lighting dimmers or neon lights. Try moving the amplifier, wiring, or light- ing to different location to see if lighting is the source of the buzz. Input transformers may also fix the problem. See section 8.1 on Input Isolation Transformer.

12.DIMENSIONS

14

Page 13 Page 15
Page 14
Image 14
Ashly FTX-1001, FTX-2001, FTX-1501 Troubleshooting Tips, No Audio Output, Distorted Sound, Hum or Buzz Noise, Dimensions
Page 13 Page 15

FTX-1001, CFT-1800, FTX-2001, FTX-1501 specifications

The Ashly FTX-1501 is a high-performance, flexible amplifier designed for professional audio applications. Renowned for its efficient power management and robust construction, the FTX-1501 is an excellent choice for both live sound reinforcement and installed sound systems.

One of the key features of the FTX-1501 is its power output. The amplifier delivers a powerful 1500 watts per channel at 4 ohms, making it capable of driving large speaker systems without compromising sound quality. This substantial power output is essential for demanding environments, where clarity and volume are critical.

In terms of technologies, the FTX-1501 incorporates advanced Class D amplification technology. This not only provides remarkable efficiency, reducing heat generation and power consumption, but also ensures a lightweight design. The amplifier's compact form factor makes it easy to transport and install, which is particularly advantageous for mobile sound engineers and touring musicians.

The FTX-1501 also features intelligent thermal management, which protects the amplifier from overheating during extended use. Integrated cooling fans adjust their speed in response to the internal temperature, ensuring optimal performance without excessive noise. This feature is critical in ensuring that the amplifier maintains its performance under various loading conditions.

Connectivity options on the FTX-1501 are versatile, catering to various audio input needs. It includes XLR and TRS inputs, alongside binding post and Speakon outputs, providing flexibility for different setups. This connectivity facilitates easy integration into existing audio systems, further enhancing its usability.

Another important aspect of the FTX-1501 is its robust build quality. The amplifier is housed in a rugged steel chassis, designed to withstand the demands of both touring and fixed installations. The front panel features a user-friendly interface with LED indicators for power and signal status, making monitoring straightforward during live events.

Finally, the Ashly FTX-1501 embodies a commitment to audio fidelity. Its design minimizes distortion and enhances signal integrity, allowing users to enjoy clear, dynamic sound reproduction even at high volume levels. Whether for small venues or large events, the Ashly FTX-1501 amplifier is engineered to deliver exceptional performance, reliability, and versatility, making it a trusted choice for audio professionals worldwide.
Top Page Image Contents