INTRODUCTION- General Overview

Introduction

Thank you and congratulations on your purchase of the ISIS 215PCM Powered-System Control Module or 215SB Subwoofer. This product represents the state-of-the-art in all-weather, lightweight SR (sound reinforcement) loudspeaker systems. The “215” marks the introduction of QSC’s ISIS loudspeaker systems. ISIS is short for Inte- grated, Self-Powered—Self Processed, Industrial Systems. To get the most from your investment, we encourage you to review this manual carefully.

The 215PCM is a self-contained active subwoofer system with dual 15-inch drivers. It provides power amplification not only for itself, but also two channels for driving full- range or biamp “top box” speakers as well. It is the most advanced core module for portable live sound reinforce- ment systems and is ideal for corporate and industrial events. The 215SB is a passive subwoofer system with no backpack electronics, equipped with a single Speakon™ connector.

Composilite™

QSC enclosures incorporate Composilite, a patented cored composite technology that yields superior acoustic properties, lighter weight, and greater weather resistance compared to conventional enclosure materials. Multiple skins of carbon fiber are layered over a honeycomb core to form a rigid, seamless enclosure. The extreme stiffness of Composilite construction prevents flexing of the cabinet enclosure, significantly reducing energy loss due to cabinet vibration. The result is reduced enclosure loss, increased low frequency output, and substantially less sound radiating from the back and sides of the enclosure for greater sonic accuracy. Furthermore, the enclosure’s light weight translates to safer rigging and reduced handling costs.

215SB Subwoofer Highlights

The frequency response of the 215PCM is 35 to 150 Hz (-3 dB). Two 15-inch, diametrically opposed (facing each other) drivers fire in opposite directions with equal excursion. The net effect being the driver forces counterbalance, minimizing vibration in the cabinet. This is essential in lightweight, ultra-stiff cabinet designs to keep the walls from vibrating excessively and to keep the cabinet from “walking away” during use.

215PCM Powered Control Module Highlights

The “PCM” version adds a 55 pound amplification and signal processing backpack to the 215SB subwoofer cabinet. This backpack houses two independent power amplifiers, one for the subwoofer and one for the “top boxes”. Driving the subwoofer is the equivalent of a bridged-mode PL230 amplifier providing up to 3000 watts to the two 15-inch drivers. Top boxes are powered by the equivalent of a PL236 amplifier (725 W/ch. @8 ohms, 1100 W/ch. @ 4 ohms, 1850 W/ch. @ 2 ohms). Signal processing is provided by two DSP-3 Digital Signal Processors with 24-bit, 48 kHz. convertors. Both processors have eight user- configurable and -selectable presets. An RS-232 connection to a PC running the provided QSC Signal Manager Software enables system tuning and configuration.

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QSC Audio ISIS 215SB user manual INTRODUCTION- General Overview, Introduction, Composilite, 215SB Subwoofer Highlights
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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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