Questions and Answers

Note

When the amplifier is first plug- ged in, there is a brief delay before it can be put into the operational mode. Please wait approximately 10 seconds.

Q.Should I turn the S–1500 amplifier off (unplug the amplifier) when not playing music?

A.No. Leave the S–1500 amplifier in the stand-by mode when not playing music. The stand-by mode avoids cold starts as well as minimizes heat output and power consumption. Turn the amplifier off if you plan to be away for a period of time, for example, on vacation. See Operating the S–1500 Amplifier, on page 15.

Q.When I turn the amplifier on there is a loud hum through the loudspeakers. What should I do?

A.When a new component is introduced, a low frequency hum may occur in one or both loudspeakers. Check that all input and output connections and cables are of sound construction. See Troubleshooting System Noise, on page 16. If the connections and cables are sound, you may be experiencing a ground loop. This can often be easily eliminated. Please contact your autho- rized Krell dealer, distributor, or Krell for suggestions.

Q.When I connect the amplifier to my system using the single-ended inputs, a loud buzz comes from my loudspeakers. What is it?

A.Check that the shorting pins for the S–1500 amplifier are inserted into the XLR inputs (the unit is shipped with the pins in place). When using the single-ended inputs, shorting pins must be inserted between pins 1 and 3 to keep external noise from corrupting the signal. For more information, see Connecting the S–1500 Amplifier to Your System, on page 13.

Q.I cannot turn the amplifier on. Why not?

A.Make sure the front panel LED is not flashing red. If it is flash- ing red, unplug the amplifier from the AC wall receptacle and then plug it back into the AC wall receptacle. If the LED contin- ues to flash, contact your Krell-authorized dealer or distributor, or Krell. If the LED is not illuminated, check the power cord and check the AC mains fuse. To remove the fuse, unplug the power cord from the amplifier and slide out the fuseholder.

Q.I get no signal from one of the amplifier channels when the unit is on. Why not?

A.Make sure you are not connected to channels 6 or 7 on a

S–1500 / 5, or to channel 7 on a S–1500 / 6. If you are using the single-ended input, make sure the shorting pin is inserted between pins 1 and 3, and not between pins 2 and 3.

Krell S–1500 Multi-channel Amplifier

S1500 specifications

Krell Industries is renowned for its commitment to high-performance audio equipment, and the S1500 is a notable addition to their lineup of amplifiers. The Krell S1500 is a powerful, flexible, and highly efficient multi-channel amplifier designed primarily for home theater and sophisticated audio setups. With a robust power output of 150 watts per channel into 8 ohms and an impressive capability to drive even lower impedances, the S1500 ensures dynamic audio reproduction that is suitable for various applications.

One of the standout features of the S1500 is its Class A/B amplifier topology. This design combines the benefits of both Class A and Class B amplification, delivering clear and accurate sound reproduction while offering high efficiency. Krell has engineered the S1500 with sophisticated thermal management systems, ensuring that the amplifier runs cool, even during long listening sessions or demanding audio playback scenarios.

The S1500 employs advanced circuit topologies that minimize distortion and enhance signal integrity. This results in pristine audio quality, capable of handling the delicacy of classical pieces as well as the demands of high-action films. Krell’s proprietary technologies, such as the Krell Current Mode, maximize the amplifier's performance by ensuring that it can respond instantaneously to changes in the audio signal, which is crucial for dynamic sound reproduction.

Connectivity on the S1500 is generous, featuring balanced and unbalanced inputs to cater to a variety of audio sources. This flexibility allows the amplifier to integrate seamlessly into any high-end audio or home theater system. Additionally, the amplifier includes extensive protection circuitry to safeguard against short circuits, overheating, and overload conditions, contributing to its durability and reliability.

The design aesthetic of the S1500 reflects Krell's commitment to both form and function, with a sleek, modern chassis that complements any audio setup. The amplifier also features a user-friendly front panel that provides access to status indicators and controls, making it easy for users to operate.

In summary, the Krell Industries S1500 is a meticulously designed multi-channel amplifier that combines advanced technologies with robust power output, ensuring an unparalleled listening experience. Its exceptional audio fidelity, smart thermal management, and extensive connectivity options make it a top choice for audiophiles and home theater enthusiasts alike. Whether for music or movies, the S1500 stands as a testament to Krell’s legacy of excellence in audio engineering.