Superlux CP828 Microphone Impedance Matching Transformer

Product Description
The Superlux CP828 is a professional, inline passive impedance matching adapter that enables seamless bidirectional conversion between low-impedance (Lo-Z) and high-impedance (Hi-Z) audio devices. Featuring a male XLR connector on one end and a 1/4′ mono plug on the other, it is the perfect solution for adapting unbalanced high-impedance audio gear—such as specialized harmonica microphones (e.g., Superlux D112/C)—to standard low-impedance balanced mixer inputs without compromising signal quality. Its high-grade internal transformer shields against high-frequency loss and external noise interference. [1, 2, 3, 4, 5]
Key Features
• XLR Male Output: Built with an XLR-M connector to plug directly into microphone inputs on mixing consoles, stage snakes, or audio interfaces.
• Passive Operation: Purely component-driven workflow requiring no batteries, phantom power, or external power supplies.
• Signal Preservation: Prevents high-frequency roll-off over long cable extensions while ensuring maximum bandwidth transmission. [1, 2, 3, 4]
Technical Specifications
Parameter Value
Product Type Passive Impedance Converter / Matching Transformer
Input Impedance 50,000 ? / 50 k? (Nominal Hi-Z)
Output Impedance 250 ? (Nominal Lo-Z)
Frequency Response 20 Hz – 20,000 Hz (20 kHz)
Connectors 3-pin XLR-M (Male) to 1/4′ (6.3 mm) TS Mono Plug
Housing Construction Metal-shielded, durable casing
Weight Approx. 50 g – 80 g