The Crown XFMR-4 and XFMR-8 are advanced, rack-mountable transformers designed to provide seamless impedance matching between amplifier outputs and “constant voltage” loudspeakers. These units are essential for amplifiers that lack direct 70Vrms or 100Vrms output capability, enabling them to drive distributed speaker systems specifically designed to operate at those voltages.

**Key Features:**

1. **Impedance Matching:** The XFMR-4 and XFMR-8 transformers offer four and eight channels, respectively, to ensure precise impedance matching for constant voltage operations. This feature is crucial for maintaining audio quality and system efficiency in large-scale audio installations.

2. **Constant Voltage Output:** When used exclusively with the ComTech DriveCore™ Series of amplifiers, these transformers provide consistent 70Vrms and 100Vrms output. This capability is vital for integrating with distributed audio systems commonly used in commercial and public address applications.

3. **Integration with Amplifiers:** The transformers facilitate easy integration of amplifiers without direct constant voltage output capability into distributed systems. This adaptability makes the XFMR-4 and XFMR-8 versatile additions to any audio setup, ensuring compatibility and enhancing overall system functionality.

4. **Jumper Cables Included:** To simplify the installation process, Crown includes “jumper” cables with the XFMR units. These cables make it easy to incorporate the transformers with a ComTech DriveCore amplifier, ensuring a hassle-free setup and reducing installation time.

**Technical Specifications:**

– **Output Connectors:** The units feature pluggable barrier block connectors that can accept up to 14 AWG wire, ensuring robust and secure connections.
– **Frequency Response:** With a frequency response of +/-1.0dB from 70Hz to 15 kHz, these transformers maintain audio fidelity across a wide range of frequencies, ensuring clear and accurate sound reproduction.
– **Insertion Loss:** The XFMR-4 and XFMR-8 have an insertion loss of ≤1.0 dB max at 70VAC, minimizing signal degradation and preserving audio quality.
– **Max Input:** These transformers can handle a maximum input of 32Vrms/125W, providing ample headroom for demanding audio applications.
– **Dimensions:** Both units are designed with dimensions of 19″ x 1.72″ x 15.6″ (48.3cm x 4.4cm x 39.7cm), making them suitable for standard rack installations.
– **Weight:** The XFMR-4 weighs 17 lbs (7.7 kg), ensuring stability and ease of handling during installation.

**Practical Applications:**

The Crown XFMR-4 and XFMR-8 are ideal for a variety of commercial audio applications, including background music systems, public address systems, and any scenario requiring distributed audio with consistent voltage levels. Their robust design and compatibility with the ComTech DriveCore Series amplifiers make them a reliable choice for audio professionals seeking to enhance their sound systems.

In summary, the Crown XFMR-4 and XFMR-8 transformers are indispensable tools for achieving optimal impedance matching and consistent voltage output in distributed audio systems. Their advanced features, easy integration, and high-quality performance ensure that they meet the rigorous demands of professional audio installations.