Sennheiser SI 1015-8000 Dual System Package, 8,000 sq ft coverage

Product Overview

The Sennheiser SI 1015-8000 Dual System Package is a complete infrared assistive listening system designed for mid-size venues requiring ADA-compliant hearing assistance coverage across spaces up to 8,000 square feet. The package centers on the SI 1015 wideband modulator paired with a dual-radiator configuration, making it a practical choice for medium-sized houses of worship, auditoriums, courtrooms, and conference facilities. As a turn-key Sennheiser IR assistive listening solution, it includes all hardware, receivers, and charging components needed for a complete installation.

Product Description

The SI 1015-8000 Dual System Package delivers infrared audio coverage across rooms up to 8,000 square feet using the SI 1015 wideband modulator and two infrared radiators in a daisy-chain configuration. The SI 1015 operates on the IEC 61603-standard carrier frequencies of 2.3 and 2.8 MHz, supporting single-channel, two-channel, and stereo transmission modes. The dual-radiator setup addresses coverage requirements that exceed what a single emitter can reliably serve, distributing IR output across the room and reducing the likelihood of shadowing or dropout zones.

The modulator's two BNC RF outputs feed the paired radiators, which can be daisy-chained in series using standard Sennheiser GZL 1019-series BNC cables. A 50Ω terminating resistor is included for proper signal termination when daisy-chaining emitters, a detail that distinguishes this package from entry-level single-radiator configurations and ensures clean RF signal delivery to both units.

The SI 1015 modulator mounts in a standard 1U half-rack (1/2 19-inch) enclosure and ships with rack-mount ears and a GA1031-CC rack adapter, allowing it to be integrated into existing AV racks alongside DSPs, amplifiers, and audio processors. Two balanced XLR-3 inputs with 600Ω impedance accept line-level audio from mixing consoles, DSP output zones, or hearing loop amplifiers, covering the full 10mV–5V input range.

Fifteen receivers are included for distribution to audience members. Two L151-120 charging units with an NT2013-120 power supply provide a managed charging workflow between services or events. An included WM1 wall mount offers an alternative to rack mounting for installations where a dedicated AV rack is not practical. This package is sized for venues such as mid-capacity sanctuaries, community theater spaces, council chambers, and large classroom or lecture environments.

Key Features

• Dual Radiator Configuration for 8,000 sq ft — Two infrared emitters provide overlapping IR coverage across spaces up to 8,000 square feet, reducing dead zones and ensuring consistent field strength throughout the room.
• 50Ω Terminating Resistor Included — Proper BNC termination hardware is included for daisy-chained emitter runs, ensuring signal integrity across both radiators without additional procurement.
• 2.3 and 2.8 MHz Dual Carrier Frequencies — The SI 1015 modulator supports both standard IEC IR carrier frequencies, enabling simultaneous dual-channel or stereo audio on a single system.
• Single, Two-Channel, and Stereo Transmission Modes — Switchable modes allow the system to serve standard assistive listening on one channel and interpretation or bilingual audio on the second channel simultaneously.
• Two Balanced XLR-3 Audio Inputs — 600Ω impedance balanced inputs accept line-level audio from professional mixing consoles, DSPs, and hearing loop amplifier outputs.
• BNC Daisy-Chain RF Outputs — Dual BNC RF outputs on the modulator support daisy-chained radiator connections, simplifying cable management in installations with distributed emitter placement.
• 1/2 19-Inch, 1U Rack-Mount Housing — Compact modulator form factor with included rack ears integrates into standard AV equipment racks without consuming a full rack unit.
• 15 Included Receivers — Receivers ship in the package and are compatible with standard 3.5mm hearing aid neck loops for users who prefer induction coupling over direct ear speakers.
• Integrated Charging Infrastructure — Two L151-120 charging units and an NT2013-120 power supply provide a complete overnight receiver charging solution.
• IR Monitoring Diodes on Modulator — Built-in IR monitoring diodes on the SI 1015 give installers and operators a quick visual check of system activity without a separate test tool.

Typical Applications

• House of Worship — Medium-capacity sanctuaries, fellowship halls, and multi-purpose rooms requiring ADA-compliant hearing assistance for congregants.
• Auditorium — Community theater spaces, school auditoriums, and civic meeting halls needing a distributed IR receiver system.
• Government Space / Courtroom — Council chambers, hearing rooms, and courtrooms where assistive listening is mandated under ADA Title II requirements.
• Conference Center — Hotel ballrooms, convention breakout rooms, and corporate conference halls with variable seating configurations.
• University Lecture Hall — Fixed-installation lecture environments supporting hearing accommodation for students under Section 504 or ADA Title II.

Technical Specifications

Frequently Asked Questions

Q: Is this system ADA-compliant for assistive listening?

Infrared systems operating on IEC 61603-standard carrier frequencies (2.3 and 2.8 MHz) are an accepted assistive listening technology under ADA Standards for Accessible Design Section 219. Venues should confirm the required number of receivers with an accessibility consultant based on fixed seating capacity.

Q: Why is a terminating resistor included in this package?

When two or more radiators are daisy-chained via BNC, the final unit in the chain must be properly terminated to prevent RF signal reflection. The included 50Ω terminating resistor attaches to the last BNC output in the chain, maintaining clean signal delivery to both emitters.

Q: Can the SI 1015 modulator be fed from an existing AV system DSP or mixer?

Yes. The SI 1015's balanced XLR-3 inputs with 600Ω impedance are compatible with standard AV mixing consoles, DSP output zones, and hearing loop amplifier line outputs. The wide 10mV–5V input range accommodates both low-level and line-level sources.

Q: Does this package support dual-language interpretation?

Yes. The SI 1015 supports two-channel operation, transmitting independent audio on the 2.3 MHz and 2.8 MHz carriers simultaneously. Receivers can be tuned to either channel, enabling one system to serve both standard assistive listening and interpretation audiences.

Q: How many additional receivers can this system support?

The number of usable receivers is limited by the IR field coverage area, not by a hard electronic cap. Within the 8,000 sq ft coverage zone, additional receivers can be used up to the venue's ADA minimum requirement or beyond. Creation Networks can supply additional HDI 302 receivers or compatible Sennheiser IR receiver models.

Q: What warranty applies to this system?

All SI 1015 series components carry Sennheiser's standard manufacturer warranty. Contact Creation Networks at creationnetworks.net for current warranty terms and post-sale support.

Q: Is professional installation recommended?

For rooms in the 5,000–8,000 sq ft range, proper radiator placement and aiming is important for achieving uniform IR coverage. Creation Networks recommends working with a certified AV integrator for fixed installations. Contact us at creationnetworks.net for installation guidance.