NCT475A-U-US vs NXFMR4CH — Compare
Crown Audio CT475 Four-Channel 75W Power Amplifier vs Crown XFMR-4 Four Channel Transformer
The CT475 is a standalone four-channel power amplifier with DriveCore technology designed for direct amplification in live and studio settings, while the XFMR-4 is a passive transformer module that converts standard amplifier outputs to 70V/100V constant-voltage for distributed speaker systems. The CT475 suits professionals needing compact, efficient amplification; the XFMR-4 suits installers retrofitting existing amplifiers into commercial or venue speaker networks.
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Crown Audio CT475 Four-Channel 75W Power Amplifier
Specs side by side
| Crown Audio CT475 Four-Channel 75W Power Amplifier | Crown XFMR-4 Four Channel Transformer | |
|---|---|---|
| Price | $1,582.00 | $640.00 |
| Brand | Crown | Crown |
| Wattage | 1W to 300W | — |
| Condition | New | New |
Why choose Crown Audio CT475 Four-Channel 75W Power Amplifier
- ✓ Self-contained 4-channel amplifier requiring no additional modules
- ✓ DriveCore technology delivers >90% efficiency with Class AB sonic quality
- ✓ Convection-cooled, fanless operation in compact 1U chassis
- ✓ Stable across 2–16 Ohm loads; handles both standard and constant-voltage applications
Why choose Crown XFMR-4 Four Channel Transformer
- ✓ Compact single-rackspace transformer for existing amplifier integration
- ✓ Converts any standard amplifier to 70V/100V constant-voltage output
- ✓ Flat frequency response ±1.0 dB (70 Hz–15 kHz) with ≤1.0 dB insertion loss
- ✓ Flexible barrier block connectors accept up to 14 AWG wire
Frequently asked questions
Can the CT475 work with 70V/100V speaker systems without additional gear?
The CT475 description states it needs an external XFMR transformer for 70V/100V applications. It operates natively as a standard power amplifier across 2–16 Ohm loads.
Is the XFMR-4 an amplifier or just a passive accessory?
The XFMR-4 is a passive four-channel transformer module. It requires an external amplifier (such as a CT475) to provide the audio signal that it then converts to 70V/100V constant-voltage output.
What is the maximum power handling of the XFMR-4?
The XFMR-4 accepts maximum input of 32Vrms at 125W per channel. Insertion loss is ≤1.0 dB, ensuring minimal signal degradation.
Which product is better for a small touring PA system?
The CT475 is ideal for touring because it is a standalone, fanless amplifier in a single rack unit. The XFMR-4 is a supporting transformer accessory and would only be added if constant-voltage speaker distribution was required.