USE- LED Indicators (continued) and Important User Caution

LED Indicators (continued)

NOTE! If both PWR indicator LED’s fail to illuminate after turning the power to the 215PCM on, verify the AC power is working and is properly connected. If this fails to correct the

problem, disconnect the DataPort connections (if any) and retry. If the PWR indicator illuminates now, the DataPort was forcing the amplifier into Standby mode. Refer to

QSControl documentation for information regarding amplifier Standby power status.

If one Processor’s PWR indicator illuminates and the other’s does not, it is possible that one of the amplifiers could have a problem. First, disconnect the DataPort connections (if any) and retry. If the PWR indicator illuminates now, the DataPort was forcing the amplifier into Standby mode. Refer to QSControl documentation for information regarding amplifier Standby power status. If the indicator still fails to illuminate, have the 215PCM serviced by a qualified technician.

IMPORTANT USER CAUTION

The 215PCM has been equipped with a very powerful internal amplifier. The amplifier power is several times greater than the long-term power capacity of the drivers. This allows the full capacity of the

speakers to be used without reaching the clipping point of the amplifier. The extra power is provided for greater dynamic range and impact, but the drivers can be damaged by excessive long-term operating

levels. To avoid speaker damage as well as amplifier thermal muting, the user should observe the following operating limits:

Average program power, 1-minute duration: 1500 watts (3dB below clipping point, 50% average power)

Average program power, 1-hour duration: 1000 watts (5dB below clipping point, 33% average power)

Average program power, 8 hours or more: 800 watts ( 6dB below clipping point, 25% average power).

These limits apply for speakers at normal operating temperatures. If the speakers have already been running at one of the long-term limits, they will be at their full rated temperature, and should not be pushed to a higher short-term power limit. When using a short-term operating limit, there must be a similar “rest” period between each run.

The speakers must be operated within their rated frequency range to avoid cone damage from overexcursion. If there is audible distortion on certain notes, this must be noted as the maximum operating level, and average levels must be regulated against this limit according to the figures shown above. Speakers operated at these maximum limits will experience severe flexing stress, and should be inspected frequently for damage around the edge of the cone, using a flashlight through the speaker grille.

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QSC Audio ISIS 215SB user manual USE- LED Indicators and Important User Caution
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ISIS 215SB specifications

The QSC Audio ISIS 215SB is a powerful subwoofer designed to meet the needs of live performances, installations, and various audio applications. Engineered with excellence, the ISIS 215SB offers an impactful bass response, making it a reliable choice for professionals in the music and entertainment industry.

At the heart of the ISIS 215SB is its dual 15-inch low-frequency drivers. These drivers are specifically designed to produce deep, resonant bass tones with high efficiency. The subwoofer features a remarkable power handling capacity, allowing it to deliver robust sound levels without distortion. With an impressive peak power rating, the ISIS 215SB can easily handle complex musical passages while maintaining clarity and punch.

One of the standout technologies of the ISIS 215SB is its advanced cabinet design. Constructed from high-density plywood, the enclosure is built for durability and strength. This design minimizes unwanted resonance, ensuring that the audio output remains clean and powerful. The cabinet also features a durable finish that can withstand the rigors of touring and live events, making it an excellent investment for audio professionals.

The ISIS 215SB is also equipped with a sophisticated integrated amplifier that ensures consistent performance across a wide range of frequencies. This amplifier is engineered to work seamlessly with the drivers, providing optimal power distribution and protection from overheating. The result is a subwoofer that can perform reliably in demanding conditions, whether it’s in a concert hall, nightclub, or outdoor event.

Connectivity is another significant aspect of the ISIS 215SB. It includes multiple input options, allowing for easy integration into various audio systems. The subwoofer features speakON connectors, which provide secure and stable connections, reducing the risk of signal loss during performance. This versatility enables the ISIS 215SB to be a formidable component of any sound system.

The design of the ISIS 215SB also prioritizes portability. Weighing comparatively less than many other subwoofers in its class, it comes with built-in handles for easier transportation. This feature is especially beneficial for touring professionals who require mobility without sacrificing sound quality.

In conclusion, the QSC Audio ISIS 215SB subwoofer is a leading choice for those seeking a blend of power, durability, and versatility. Its dual 15-inch drivers, advanced cabinet construction, integrated amplifier, and connectivity options make it an excellent solution for various audio applications, delivering the high-quality low-frequency performance expected from a top-tier audio product.
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