Superlux CP838 Microphone Impedance Matching Transformer

Product Description
The Superlux CP838 is a professional inline passive audio converter equipped with an internal impedance matching transformer. It is primarily engineered to adapt high-impedance (Hi-Z) dynamic microphones—such as the specialized Superlux D112/C Harmonica Microphone—so they can plug directly into low-impedance (Lo-Z) balanced XLR microphone inputs on mixing consoles and stage boxes. By matching the signal paths correctly, the CP838 prevents high-frequency data loss, eliminates signal degradation over long cable extensions, and ensures optimal gain structure without relying on external power supplies. [1, 2]
Key Features
• Form Factor Variant: Features a female 1/4′ TS (6.3 mm) input port and a male 3-pin XLR output connection.
• Passive Circuitry: Pure transformer-based execution requiring no battery packs or phantom power to work.
• Signal Enhancer: Allows high-impedance setups to utilize long balanced cable systems while retaining high bandwidth and shielding out external noise. [1]
Technical Specifications
Parameter Value
Product Type Passive Impedance Matching Transformer / Audio Adapter
Input Impedance (TS Female) 50,000 ? / 50 k? (Nominal Hi-Z)
Output Impedance (XLR Male) 250 ? (Nominal Lo-Z)
Frequency Response 20 Hz – 20,000 Hz (20 kHz)
Input Connection 1/4′ (6.3 mm) TS Female Mono Jack
Output Connection 3-pin XLR-M Male Plug
Physical Dimensions 20 mm × 100 mm (?0.8′ x 3.9′)
Weight Approx. 80 g (2.8 oz)