400V MKP Metallized Polypropylene Audio Capacitor 2.2µF–10µF | Non-Polarised | HiFi Crossover Speaker | 2PCS

$7.40 USD

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Capacitance 400V4.7UF 400V6.8UF 400V3.3UF 400V3.9UF 400V10UF 400V2.2UF

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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.