400V MKP Audio Capacitor 0.1µF-47µF for HiFi Frequency Divider & Speaker Applications

400V MKP Polypropylene Film Audio Capacitor — 0.1µF to 47µF, HiFi Crossover & Speaker

MKP (Metallized Polypropylene) film capacitors are the gold standard for audio crossover networks, speaker frequency dividers, and audiophile amplifier coupling applications. Unlike electrolytic capacitors, MKP capacitors are non-polarized, have negligible ESR (equivalent series resistance), extremely low dielectric absorption, and virtually zero distortion — making them the preferred choice for any signal path where audio quality is paramount.

This listing covers a wide range of capacitance values from 0.1µF to 47µF at 400V (and 0.1µF at 630V), sold in 2-piece packs. Select the required capacitance value from the dropdown.

Specifications

• Type: MKP — Metallized Polypropylene Film Capacitor
• Rated Voltage: 400V DC (most values) / 630V DC (0.1µF variant)
• Capacitance Range: 0.1µF, 0.22µF, 0.47µF, 1.0µF, 1.5µF, 2.2µF, 3.3µF, 3.9µF, 4.7µF, 5.6µF, 6.8µF, 8.2µF, 10µF, 12µF, 15µF, 18µF, 20µF, 22µF, 33µF, 47µF
• Tolerance: ±5% (J-grade) typical
• Package: Through-hole (radial leads)
• Dielectric: Polypropylene film (PP)
• ESR: Ultra-low (milliohm range at audio frequencies)
• Dielectric Absorption: <0.01% (negligible — no memory effect)
• Dissipation Factor (tanδ): <0.001 at 1kHz (audiophile grade)
• Operating Temperature: −40°C to +85°C
• Quantity: 2 pieces per pack

Why MKP for Audio?

• Non-polarized: Can be used in AC signal paths without orientation concern — essential for crossover networks where signal polarity alternates
• Ultra-low ESR: Minimal resistive losses at audio frequencies (20Hz–20kHz) — no high-frequency rolloff from series resistance
• Zero distortion: Polypropylene dielectric is perfectly linear — no harmonic distortion added to the audio signal
• No dielectric absorption: Unlike electrolytic capacitors, MKP capacitors do not “remember” previous charge states — no smearing of transients
• Long life: Film capacitors do not dry out or degrade like electrolytic capacitors — service life exceeds 100,000 hours
• High voltage rating: 400V rating provides large safety margin in typical 8–50V audio amplifier circuits

Speaker Crossover Network Design

MKP capacitors are used in passive crossover networks to route frequency bands to the appropriate drivers:

• High-pass filter (tweeter): Capacitor in series with tweeter. Crossover frequency: f = 1 / (2π × C × R), where R = tweeter impedance (typically 8Ω). Example: 2.2µF for ~9kHz crossover with 8Ω tweeter.
• Low-pass filter (woofer): Inductor in series with woofer (capacitor in parallel for 2nd order). Capacitor value determines rolloff slope and frequency.
• Bandpass filter (midrange): Combination of high-pass and low-pass sections using MKP capacitors and air-core inductors.

Crossover Frequency Reference (8Ω load)

• 0.47µF: ~42kHz (super-tweeter protection)
• 1.0µF: ~20kHz (tweeter high-pass)
• 2.2µF: ~9kHz (tweeter high-pass)
• 4.7µF: ~4.2kHz (mid-tweeter crossover)
• 10µF: ~2kHz (midrange high-pass)
• 22µF: ~900Hz (midrange/woofer crossover)
• 47µF: ~420Hz (woofer high-pass / subwoofer crossover)

Amplifier Coupling Applications

• Output coupling capacitor in single-ended tube amplifiers (blocks DC from speaker)
• Interstage coupling in tube preamplifiers (signal path capacitor)
• Bypass capacitor across cathode resistor in tube stages (improves gain and frequency response)
• Input coupling in solid-state amplifiers (blocks DC offset from source)

Typical Applications

• 2-way and 3-way passive speaker crossover networks
• DIY HiFi speaker system frequency dividers
• Tube amplifier interstage and output coupling
• Audiophile preamplifier signal path capacitors
• Subwoofer crossover high-pass filter
• Electrostatic speaker bias supply filtering
• Power amplifier Zobel network (impedance equalization)
• Motor run capacitor replacement in audio-grade applications

Package Contents

• 2 × MKP polypropylene film audio capacitor (capacitance value as selected)

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