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400V MKP Metallized Polypropylene Audio Capacitor 2.2µF–10µF | Non-Polarised | HiFi Crossover Speaker | 2PCS
400V MKP Metallized Polypropylene Audio Capacitor 2.2µF–10µF | Non-Polarised | HiFi Crossover Speaker | 2PCS
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400V MKP Metallized Polypropylene Audio Capacitor — 2.2µF–10µF | Non-Polarised | HiFi Speaker Crossover
A premium 400V rated MKP (Metallized Polypropylene) film audio capacitor in the 2.2µF–10µF range — the ideal choice for tweeter high-pass filters and midrange bandpass filters in HiFi speaker crossover networks. The 400V rating provides substantial voltage headroom above the 250V version, making this capacitor suitable for high-power speaker systems where peak voltage across the crossover components can be significant. The non-polarised construction is essential for crossover applications where the capacitor carries AC audio signals — a polarised electrolytic capacitor would distort and eventually fail in this application. Supplied as 2PCS per order for stereo crossover builds.
Specifications
| Type | MKP Metallized Polypropylene Film Capacitor |
| Rated Voltage | 400V DC |
| Capacitance Range | 2.2µF – 10µF |
| Polarity | Non-polarised (AC safe) |
| Package Type | Through-hole, radial lead |
| Structure | Fixed capacitor |
| Colour | Black |
| Quantity | 2PCS per order |
| Origin | Mainland China |
400V vs. 250V MKP — When to Choose 400V
| Scenario | Recommended Voltage Rating |
|---|---|
| Standard HiFi speaker system (up to 100W/8Ω) | 250V adequate |
| High-power speaker system (100W–500W/8Ω) | 400V recommended |
| Professional PA speaker system (>500W) | 400V or higher |
| Tube amplifier coupling (high-voltage signal path) | 400V or higher |
| Power supply bypass in high-voltage circuits | 400V or higher |
Peak voltage across a crossover capacitor = √(2 × P × Z), where P = amplifier power (W) and Z = speaker impedance (Ω). For a 200W/8Ω system: √(2 × 200 × 8) = 56V peak. A 400V rating provides a 7× safety margin — more than adequate for even high-power systems.
Crossover Frequency Reference (2.2µF–10µF, 8Ω tweeter)
| Capacitance | Crossover Frequency (8Ω) | Crossover Frequency (4Ω) |
|---|---|---|
| 2.2µF | ~9.0 kHz | ~18.1 kHz |
| 3.3µF | ~6.0 kHz | ~12.1 kHz |
| 3.9µF | ~5.1 kHz | ~10.2 kHz |
| 4.7µF | ~4.2 kHz | ~8.5 kHz |
| 6.8µF | ~2.9 kHz | ~5.9 kHz |
| 10µF | ~2.0 kHz | ~4.0 kHz |
First-order (6dB/octave) high-pass filter. Formula: f = 1 ÷ (2π × C × Z)
Key Features
- ✅ 400V rated — substantial voltage headroom for high-power speaker systems and tube amplifier applications
- ✅ Metallized polypropylene film — self-healing dielectric, extremely low ESR, near-zero dielectric absorption
- ✅ Non-polarised — safe for AC audio signals in crossover networks, no polarity concerns
- ✅ Low distortion — polypropylene film dielectric contributes negligible THD to the audio signal
- ✅ 2.2µF–10µF range — covers tweeter high-pass and midrange bandpass crossover frequencies for 4Ω and 8Ω speakers
- ✅ Through-hole radial lead — easy PCB and point-to-point wiring installation
- ✅ 2PCS per order — matched pair for stereo crossover builds
Common Applications
- HiFi speaker tweeter high-pass filter (2-way crossover)
- Midrange bandpass filter (3-way crossover)
- High-power PA speaker crossover network
- Tube amplifier output coupling capacitor
- Audio signal path coupling and decoupling
- Power supply audio-grade bypass (high-voltage rails)
Frequently Asked Questions
Q: Can I use this capacitor in a subwoofer low-pass filter?
A: Subwoofer low-pass filters typically require much larger capacitance values (47µF–100µF+). This 2.2µF–10µF range is optimised for tweeter and midrange high-pass applications. For subwoofer low-pass, use the 250V series in larger values.
Q: Is the 400V rating necessary for a home HiFi system?
A: For typical home HiFi systems (up to 100W), 250V is adequate. The 400V version is recommended for high-power systems, professional applications, and tube amplifier coupling where higher voltage headroom is beneficial.
Package Contents
- 2× 400V MKP Metallized Polypropylene Audio Capacitor (capacitance as selected)
