Sennheiser SI 1015-4000 Single System Package - USSI1015-4K SIN

Product Overview

The Sennheiser SI 1015-4000 Single System Package is a complete infrared assistive listening solution covering rooms up to 4,000 square feet with a single SZI 1015 radiator. The package ships with every component needed for a compliant, operational installation: modulator, radiator, power supplies, rack hardware, five RI 250 IR stethophone receivers, and two L151-120 charging units. It is designed for venues that need a straightforward ADA-compliant assistive listening system without building a bill of materials from individual components. The SI 1015 system supports both single-channel and dual-channel IR transmission modes.

Product Description

Infrared assistive listening systems transmit audio as modulated infrared light rather than RF energy, providing inherent room containment — the signal does not pass through walls, making it well suited for courtrooms, houses of worship, theaters, and multi-room conference centers where audio privacy between adjacent spaces is required. The SI 1015-4000 Single package centers on the SI 1015 Modulator, a wideband infrared modulator that accepts a balanced or unbalanced audio input from a mixing console, hearing loop, or direct feed from a sound system. The SZI 1015 emitter radiates IR throughout the coverage area and mounts to a wall or ceiling via the included WM1 wall mount bracket.

Five RI 250 IR stethophone receivers are included, allowing hearing-assistive users to tune in to the program audio directly. The RI 250 receivers charge in the included L151-120 charging units, which each hold multiple receivers simultaneously. The GA1031-CC rack adapter allows the SI 1015 Modulator to be installed in a standard 19-inch equipment rack alongside other AV components. Power is provided by the included NT1015-120 29VDC supply for the emitter and NT2013-120 for the charging unit. For venues with larger footprints or greater simultaneous listener capacity, Sennheiser’s SI 1015 line scales to multi-radiator configurations and higher receiver counts.

Key Features

• Complete Turn-Key Package — Ships with modulator, radiator, receivers, chargers, rack hardware, and all required power supplies — nothing additional required for a standard single-zone installation.
• 4,000 Sq Ft Single-Radiator Coverage — The SZI 1015 emitter provides IR coverage for rooms up to 4,000 square feet with a single radiator unit.
• Infrared Transmission (Room-Contained) — IR signal does not pass through walls, preventing audio spillover between adjacent rooms and protecting program confidentiality.
• Single and Dual Channel Modes — Supports both single-channel and dual-channel IR transmission for language interpretation or simultaneous alternate-language audio delivery.
• Five RI 250 Stethophone Receivers Included — Hearing-assistive users receive program audio through included personal IR receivers with volume control.
• Two L151-120 Charging Units Included — Multi-receiver charging cradles keep the included RI 250 units ready for use between events or services.
• 19-Inch Rack Mounting — GA1031-CC rack adapter integrates the SI 1015 Modulator cleanly into a standard equipment rack.
• WM1 Wall Mount Bracket Included — The SZI 1015 radiator can be wall- or ceiling-mounted using the included bracket for flexible positioning.
• ADA Compliance Support — Designed to support venue compliance with ADA Section 4.33.7 assistive listening system requirements for assembly areas.
• Scalable Platform — The SI 1015 system supports multi-radiator expansion for larger venues, and additional RI 250 receivers can be added as listener counts grow.

Typical Applications

• Houses of worship requiring ADA-compliant assistive listening for congregants with hearing loss
• Courtrooms and government assembly spaces where IR confidentiality between adjacent rooms is required
• Community theaters and performing arts venues with audiences up to 4,000 sq ft
• Conference rooms and training facilities needing dual-language or interpretation audio distribution
• K–12 and higher education auditoriums supporting hearing-impaired students

Technical Specifications

Frequently Asked Questions

Q: What is included in the SI 1015-4000 Single System Package?

The package includes the SI 1015 Modulator, SZI 1015 IR Emitter, NT1015-120 29VDC power supply, GA1031-CC rack adapter, WM1 wall mount bracket, five RI 250 IR Stethophone receivers, two L151-120 charging units, and the NT2013-120 charger power supply.

Q: What room size does this system cover?

The SZI 1015 single radiator covers rooms up to 4,000 square feet. Larger venues require additional SZI 1015 radiators; Sennheiser offers multi-radiator SI 1015 packages for expanded coverage.

Q: Does this system meet ADA assistive listening requirements?

The SI 1015 system is designed to support ADA Section 4.33.7 compliance for assembly occupancies. Integrators should verify receiver counts against current ADA guidelines based on total seating capacity. Additional RI 250 receivers are available separately.

Q: Can infrared signals leak between adjacent rooms?

No. Infrared transmission is line-of-sight and does not penetrate walls or ceilings, making it inherently room-contained. This is a key advantage over RF-based systems in venues with multiple adjacent spaces such as courtrooms, conference centers, and multi-room churches.

Q: Does this system support language interpretation (dual channel)?

Yes. The SI 1015 supports dual-channel IR transmission, enabling simultaneous delivery of two audio programs — for example, the primary program on channel 1 and an interpreted language on channel 2. Receivers with channel selection capability are required for dual-channel use.

Q: Can I add more receivers beyond the five included?

Yes. Additional Sennheiser RI 250 IR Stethophone receivers can be purchased separately and are compatible with this system. Additional L151-120 charging units are also available to accommodate larger receiver inventories.

Q: What is the warranty on the SI 1015-4000 Single System Package?

Sennheiser provides a standard 2-year manufacturer’s warranty. Contact Creation Networks for warranty registration assistance and service support.