INTRODUCTION- Technical Overview

Technical Overview:

CH1 and CH2 Inputs are connected to the Top Box Processor and to the Mode Switch. In Combination Mode, the Mode Switch connects CH1 and CH2 Inputs to the Subwoofer Processor as well. In Discrete Mode, CH1 and CH2 Inputs are disconnected from the Subwoofer Processor, and Input 3 is used to feed the Subwoofer Processor.

Independent DSP is provided for each amplifier. The DSP engines are 24-bit resolution, 48 kHz. sampling rate. They boast less than 0.01% THD+N, 20 Hz. -20 kHz. ±0.7dB frequency response and a dynamic range exceeding 93 dB. All that is required is configuring the Processors with the desired signal chain before use.

Each Processor must be configured using QSC’s Signal Manager software, included with the 215PCM. Install the software on a PC meeting the specified system require- ments, then connect to the Processors (one at a time) with an RS-232 connection and run Signal Manager. Each Processor has 8 Preset memories enabling the most used configurations to be saved as convenient, easy to recall Presets. The last applied configuration will be the power-on default, ensuring the system powers-up in the state it was last left. Refer to the software’s on-line Help system for detailed information. All software related operation information is located in Signal Manager’s Help system.

The Top Box Processor’s OUT1 and OUT2 DSP ports are connected to the 3600 watt Top Box amplifier’s CH1 and CH2 Inputs, respectively. The Top Box amplifier is configured to operate in stereo mode without any filtering. All filtering and is done in the Processor.

The Subwoofer Processor’s OUT1 DSP port is connected to the Subwoofer amplifier’s CH1 Input. The Subwoofer amplifier is operated in Bridge Mode. The amplifier has no filtering. All desired processing must be done in the Processor. The Bridge Mono outputs are wired internally to the subwoofers.

Post Processor output connections are provided on each Processor. These 3-pin terminal block connectors make daisy-chaining the processed signal to other equipment a snap.

The amplifiers are modified QSC Powerlight2 models. They feature PowerWave™ high frequency switching power supplies for maximum performance and minimum weight. Gain controls are preset to full, but each amplifier’s Gain controls are accessible through small access holes in the respective cooling air intake grill; this allows a relatively tamper-proof maximum gain setting. The amplifiers provide features such as soft-start inrush current limiting, tempera- ture-tracking bias control, variable speed cooling fans, and full output protection.

A variety of Top Box speakers are connected to the Speakon™ connectors on the rear panel. The upper Speakon is wired for optional biamp use (4-wire), and the lower Speakon is wired normally (2-wire). This connection scheme allows for biamp users to plug into one connector for all four biamp wires, while still keeping the standard two Speakons for two channel applications.

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QSC Audio ISIS 215SB user manual INTRODUCTION- Technical Overview
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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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