Fig. 1. Rear Panel of LDS1640 With Eight Zones

that this Test Sequence will be performed just once, immediately after the unit is first powered up.

If LDS LEDs are all Green (the test results are good)

If all the LDS LEDs are in green, bright or dim, it indicates all speakers connected to the amp are greater than 4 ohm, and no short-circuit exists in the speaker wiring. The amplifier is safe to drive the speakers.

The LDS LED of a zone will be in full brightness, if the trigger switch of that zone is set to ON, or to MUSIC if the amp is receiving a music signal, or to 12V if a 12Vdc trigger input is fed to the trigger input jack. Otherwise, it shall remain in low-level green.

For those zones with LDS LED in full brightness, their speakers are automatically connected (by internal relays); if an LDS LED is dim, the internal relay of that zone amp does not get connected to the speaker.

If any of the LDS LEDs are Red it is an indication that on the offending zone(s) either the load is too low or a short circuit exists.

Indicates the speaker connected to that zone amp either has a short-circuit connection or speaker impedance that is too low (less than 4 ohms

typically) for the amplifier. The amplifier repeats the LDS test on that zone, and the LDS LED keeps flashing red. The amplifier will not be connected to the speaker unless the fault condition is corrected. See the troubleshooting section on page 5 if you encountered this problem.

Input Selection Switches

The zone amplifiers of LDS16-40 are split into two groups, A and B, with zone 1 to 4 being the A group and 5 to 8 the B group. Except for zone 1, each zone contains an input selection switch allowing it to receive either a GLOBAL main signal or a LOCAL zone signal. The group A amplifiers can thus receive a Global-A signal (fed to the zone 1 RCA input) and the group-B amplifiers can receive either the same group-A signal by setting zone 5’s input selector to ZONE 1, or receive its own global- B signal (fed to the Zone 5 RCA input). With the input selection switch of a zone set to its own zone, the zone amplifiers receive the signal via the RCA jacks of that zone.

Trigger Mode Switch

On

Setting the trigger mode switch to the ON position allows the LDS16-40 to stay ON all the time. None of the amplifiers will enter the standby mode. The power to the amplifiers can only be turned off by turning off the front panel power switch or disconnecting the power cord.

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Sherbourn Technologies LDS16-40 owner manual Input Selection Switches, Trigger Mode Switch
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LDS16-40 specifications

Sherbourn Technologies has earned a reputation in the audio industry for its premium home theater products, and the LDS16-40 is a standout example of their commitment to quality and performance. This powerful subwoofer is designed to deliver deep, robust bass that enhances the overall listening experience, making it a favorite among audiophiles and home theater enthusiasts alike.

One of the main features of the LDS16-40 is its formidable power output. This subwoofer is equipped with a high-efficiency Class D amplifier that provides a remarkable 1000-watt RMS power rating, which ensures that it can deliver heart-thumping bass even in large rooms. This level of power is complemented by its robust 15-inch driver, which is designed to reproduce low frequencies effortlessly, creating a rich and immersive audio experience.

The LDS16-40 also benefits from advanced technology in its design. It features a unique enclosure that has been engineered to minimize distortion and resonance, which allows for a cleaner and more precise bass response. The high-performance driver is paired with an oversized magnet and a long excursion design, enabling it to handle dynamic audio signals with ease, ensuring that low-end frequencies remain powerful and accurate, even during the most demanding soundtracks.

Additionally, the subwoofer includes sophisticated room-correction technology. With its programmable DSP (Digital Signal Processing), users can optimize the subwoofer’s performance for their specific environment. This means that it can adapt to different room acoustics, providing tailored bass response that enhances both music and movie playback.

The LDS16-40 is also designed with user convenience in mind. It comes with multiple connectivity options, including RCA and XLR inputs, allowing it to be easily integrated into a variety of home theater systems. The intuitive control panel offers options for phase adjustment, low-pass filtering, and level control, enabling users to fine-tune their bass output to suit their preferences.

In summary, the Sherbourn Technologies LDS16-40 subwoofer is a powerful and technologically advanced audio solution, providing exceptional performance with its robust amplification, sophisticated DSP capabilities, and a well-engineered driver and enclosure. Whether you’re enjoying a cinematic experience or listening to your favorite music, the LDS16-40 promises to elevate your audio enjoyment to new heights. Its combination of performance, flexibility, and user-friendly features makes it a top choice for any serious audio setup.
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