Bose Professional 40190 70V Transformer

Product Description

The BOSE PROFESSIONAL 40190 is a 70-volt line transformer designed for use with compatible distributed audio speaker systems. This transformer handles impedance matching in 70V constant-voltage audio distribution networks, allowing multiple speakers to be wired in parallel across a single amplifier output without significant signal loss. It is typically installed by licensed audio systems technicians or low-voltage electricians working in commercial, institutional, or light industrial audio installations. The black finish suits standard ceiling or wall speaker enclosures common in these environments.

This transformer is suited for commercial distributed audio applications including retail spaces, offices, schools, and houses of worship where a 70V speaker line system is in use. It provides a practical solution for integrating speakers into an existing 70V network. The unit is sold individually and is intended as a component-level accessory for speaker installation or replacement projects.

Key Features

• Designed for 70-volt constant-voltage distributed audio systems
• Enables impedance matching for parallel speaker wiring on a shared amplifier circuit
• Black finish for discreet installation in standard speaker enclosures
• Sold individually as a single unit replacement or new-install component
• Compact form factor suited to in-ceiling or in-wall speaker assemblies

Compatibility

Designed as an OEM-style replacement or supplemental component for 70-volt distributed audio speaker systems. Consult system documentation to confirm transformer tap ratings and power handling requirements before installation.

Installation Notes

Installation should be performed by a qualified low-voltage electrician or licensed audio systems technician familiar with 70V distributed audio wiring practices. De-energize the amplifier and speaker circuit completely before connecting or disconnecting the transformer. Verify tap settings match the intended wattage per speaker zone as required by the system design. Work should comply with applicable NEC low-voltage wiring requirements for the installation environment.