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.

ISIS 215PCM specifications

The QSC Audio ISIS 215PCM is a powerful loudspeaker designed to meet the demands of professional audio applications. Known for its exceptional sound quality and robust construction, the ISIS 215PCM is engineered to deliver a superior listening experience in various settings, including live events, concerts, and installations.

One of the main features of the ISIS 215PCM is its dual 15-inch low-frequency drivers, which provide deep, resonant bass and a wide dynamic range. This design allows for high SPL (Sound Pressure Level), making it suitable for large venues. The enclosure is strategically designed to enhance performance by minimizing distortion, thus ensuring clear audio reproduction even at high volumes.

The ISIS 215PCM is equipped with a high-frequency compression driver coupled with a wide dispersion horn. This combination yields excellent high-frequency response and seamless integration with the low-frequency drivers. The dispersion pattern has been meticulously engineered, enabling consistent sound coverage throughout the audience area, which is essential in live sound applications.

In terms of technology, the ISIS 215PCM features advanced acoustic design principles that optimize both performance and durability. The enclosure is constructed from high-grade plywood and reinforced to withstand the rigors of touring and installation, while the dual ports facilitate enhanced airflow and reduced turbulence, resulting in accurate sound reproduction.

Additionally, the loudspeaker employs a sophisticated passive crossover network that effectively separates frequencies, allowing each driver to operate within its optimal range. This technology minimizes phase issues and ensures that the transitions between the low and high frequencies are smooth and natural.

Portability is another significant characteristic of the ISIS 215PCM. It includes robust handles for easy transport and installation, making it a great choice for sound engineers and technicians who need to set up and break down equipment regularly. The professional-grade connections further enhance convenience and reliability in diverse applications.

Ultimately, the QSC Audio ISIS 215PCM is a remarkable loudspeaker that combines innovative technologies, premium materials, and thoughtful design. It is ideal for audio professionals seeking a reliable solution that delivers exceptional sound quality and performance. With its versatility and robust features, the ISIS 215PCM stands out as a formidable choice for both live sound and permanent installations.