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250V MKP Metallized Polypropylene Film Audio Capacitor 0.22µF–68µF | MKPA-C Series | HiFi Crossover | 2PCS
250V MKP Metallized Polypropylene Film Audio Capacitor 0.22µF–68µF | MKPA-C Series | HiFi Crossover | 2PCS
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250V MKP Metallized Polypropylene Film Audio Capacitor — MKPA-C Series | 0.22µF–68µF | HiFi Crossover
The MKPA-C series MKP (Metallized Polypropylene) film capacitor is the audiophile’s choice for speaker crossover networks, HiFi frequency dividers, and audio coupling applications where electrolytic capacitors introduce unacceptable distortion and ESR. Polypropylene film capacitors are self-healing — a localised dielectric breakdown causes the metallized electrode to evaporate at the fault point, restoring insulation without catastrophic failure. The result is a capacitor with extremely low ESR, near-zero dielectric absorption, and a flat frequency response that preserves audio signal integrity across the full audible spectrum. Rated at 250V with capacitance values from 0.22µF to 68µF, this series covers the full range of crossover network requirements from tweeter high-pass to woofer low-pass filters. Supplied as 2PCS per order.
Specifications
| Series | MKPA-C (Metallized Polypropylene Film) |
| Rated Voltage | 250V DC |
| Voltage Proof | 1.6× rated voltage (400V, 2 seconds) |
| Capacitance Range | 0.22µF – 68µF |
| Capacitance Tolerance | ±5% (J) / ±10% (K) options |
| Dissipation Factor | ≤0.08% max at 1kHz, 25°C |
| Insulation Resistance | >30,000 MΩ (≤0.33µF) / >10,000 MΩ (>0.33µF) |
| Operating Temperature | -40°C to +85°C |
| Package Type | Through-hole, radial lead |
| Quantity | 2PCS per order |
Why MKP Film Capacitors for Audio — vs. Electrolytic
| Property | MKP Film (this product) | Electrolytic |
|---|---|---|
| ESR (equivalent series resistance) | Extremely low (<0.1Ω typical) | High (1–10Ω typical) |
| Dielectric absorption | Near zero | Significant (causes signal smearing) |
| Frequency response | Flat from DC to MHz | Degrades above a few kHz |
| Polarity | Non-polarised (AC safe) | Polarised (DC only, or bipolar) |
| Self-healing | Yes (metallized electrode) | No |
| Lifespan | Decades (no electrolyte to dry out) | 10–20 years (electrolyte degrades) |
| Audio distortion | Extremely low | Measurable THD contribution |
Crossover Network Design Reference
Use these formulas to select the correct capacitance for your crossover network:
- High-pass filter (tweeter): C = 1 ÷ (2π × fₙ × Z) — where fₙ = crossover frequency (Hz), Z = tweeter impedance (Ω)
- Low-pass filter (woofer): L = Z ÷ (2π × fₙ) — use in conjunction with series inductor
- Example: 3kHz crossover, 8Ω tweeter: C = 1 ÷ (2π × 3000 × 8) = 6.6µF → select 6.8µF
Key Features
- ✅ Metallized polypropylene film — the gold standard dielectric for audio applications
- ✅ Self-healing construction — localised dielectric breakdown self-repairs, preventing catastrophic failure
- ✅ Extremely low ESR — ≤0.08% dissipation factor at 1kHz preserves audio signal integrity
- ✅ Non-polarised — safe for AC audio signals in crossover networks without polarity concerns
- ✅ 250V rating — adequate headroom for high-power speaker systems
- ✅ -40°C to +85°C — stable capacitance across the full operating temperature range
- ✅ 0.22µF–68µF range — covers tweeter high-pass through woofer low-pass crossover requirements
- ✅ 2PCS per order — matched pair for stereo crossover builds
Common Applications
- HiFi speaker crossover network (2-way and 3-way)
- Tweeter high-pass filter capacitor
- Midrange bandpass filter capacitor
- Subwoofer low-pass filter capacitor
- Audio amplifier coupling and decoupling
- Tube amplifier output stage coupling
- Audio signal path bypass capacitor
- Power supply audio-grade bypass
Frequently Asked Questions
Q: Can I use these in a speaker crossover with an 8Ω speaker?
A: Yes. The 250V rating provides ample headroom for even high-power speaker systems. Use the crossover frequency formula above to select the correct capacitance value.
Q: Are these suitable for tube amplifier coupling?
A: Yes. MKP film capacitors are widely used in tube amplifier coupling applications due to their low dielectric absorption and non-polarised construction. The 250V rating is suitable for most tube amplifier signal coupling stages.
Q: What is the lead pitch (pin spacing)?
A: Lead pitch varies by capacitance value. Larger capacitance values have wider lead pitch. Refer to the MKPA-C series datasheet for specific dimensions by value.
Package Contents
- 2× 250V MKP MKPA-C Metallized Polypropylene Film Audio Capacitor (capacitance as selected)
