What amplifiers does the XFMR-4 work with?

The XFMR-4 integrates standard amplifiers without native constant-voltage output into CV speaker systems. It includes jumper cables for ComTech DriveCore amplifier integration and accepts up to 32Vrms / 125W input per channel.

What output voltages does it support?

The transformer outputs both 70Vrms and 100Vrms constant-voltage signals, allowing you to match your distributed speaker system requirements and extend speaker runs across larger spaces with minimal signal loss.

What is the frequency response and signal loss?

The XFMR-4 maintains a flat response of +/– 1.0 dB from 70 Hz to 15 kHz with insertion loss of ≤1.0 dB, ensuring transparent audio transmission without coloration or degradation.

How are connections made?

The unit features pluggable barrier block connectors that accept up to 14 AWG wire for flexible input and output configuration. Jumper cables are included for simplified setup.

Does it fit in a standard rack?

Yes, the XFMR-4 occupies a single rack unit (1 RU) and mounts in any standard 19-inch equipment rack, making it compact enough for fixed installations or touring rigs.

Do I pay sales tax on this order?

We collect sales tax only on orders shipped to California. Orders shipped to any other US state are charged $0 sales tax at checkout when you buy direct from our website. On this item that is roughly $45 less out the door than the same listed price at a national retailer or on a marketplace. Marketplaces such as eBay, Reverb and Amazon collect sales tax in nearly every state as marketplace facilitators no matter who the seller is, so the same item at the same price costs less bought direct. Free US shipping and 30-day returns are included. Some states ask buyers to self-report use tax on out-of-state purchases.

Crown XFMR-4 Four Channel Transformer

The Crown XFMR-4 is a compact, rack-mountable transformer designed to integrate standard amplifiers into distributed constant-voltage speaker systems for studio monitoring and facility playback. Its single-rackspace footprint houses four independent channels of impedance matching, making it an efficient solution for production facilities and control rooms requiring integration of amplifiers without native 70Vrms or 100Vrms output capability. Installation and setup are straightforward, with provided jumper cables and accessible barrier block connectors that streamline patching in the studio rack.

Studio Integration & Signal Path

This transformer enables amplifiers to drive constant-voltage distributed speaker systems by converting standard audio signals into 70Vrms and 100Vrms output, extending monitor coverage across larger tracking rooms, overdub spaces, and facility areas with minimal signal loss. The pluggable barrier block connectors accept up to 14 AWG wire, providing flexible connection options for both input and output configuration within your studio's signal chain and speaker infrastructure.

Audio Performance & Specifications

The XFMR-4 maintains a flat frequency response of +/– 1.0 dB from 70 Hz to 15 kHz, ensuring accurate, transparent signal transmission across the audible spectrum without coloration or phase shift. Maximum input rating of 32Vrms at 125W and insertion loss of ≤1.0 dB ensure minimal signal degradation through the transformer chain, preserving the integrity of your monitor mix.

Key Features

Four channels of impedance matching in a single rack unit (1 RU)
Outputs 70Vrms and 100Vrms constant-voltage when used with ComTech DriveCore amplifiers
Pluggable barrier block connectors accepting up to 14 AWG wire
Frequency response of +/– 1.0 dB (70 Hz to 15 kHz)
Maximum input specification: 32Vrms / 125W
Insertion loss ≤1.0 dB max at 70VAC
Includes jumper cables for ComTech DriveCore integration
Dimensions: 19" x 1.72" x 15.6"
Weight: 17.0 lbs (7.7 kg)
Rack-mountable design for standard 19-inch equipment racks

The Crown XFMR-4 delivers reliable transformer-based impedance conversion in a compact format, enabling seamless integration of standard amplifiers into professional constant-voltage speaker systems for studio monitoring and production facilities.

Condition	New
Country of Manufacture	China