{"product_id":"250v-fpp-polypropylene-film-audio-capacitor-1uf-18uf-hifi-crossover-tube-amp","title":"250V FPP Metallized Polypropylene Film Audio Capacitor — 1.0µF–18µF for HiFi Crossover \u0026 Tube Amp","description":"\u003ch2\u003e250V FPP Metallized Polypropylene Film Audio Capacitor — 1.0µF–18µF\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFPP (Film Polypropylene) metallized capacitors\u003c\/strong\u003e are the audiophile standard for speaker crossover networks and tube amplifier coupling stages. The polypropylene dielectric delivers near-zero dissipation factor, negligible dielectric absorption, and a non-polarized construction — making them a direct upgrade over electrolytic capacitors in any signal-path application. Rated at \u003cstrong\u003e250V DC\u003c\/strong\u003e with values from \u003cstrong\u003e1.0µF to 18µF\u003c\/strong\u003e, this range covers tweeter high-pass and midrange bandpass crossover sections as well as interstage coupling in valve amplifiers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFPP — Metallized Polypropylene Film\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e250V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCapacitance Range\u003c\/td\u003e\n\u003ctd\u003e1.0µF – 18µF (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTolerance\u003c\/td\u003e\n\u003ctd\u003e±5% or ±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDissipation Factor\u003c\/td\u003e\n\u003ctd\u003eVery low (≤0.001 at 1kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDielectric Absorption\u003c\/td\u003e\n\u003ctd\u003eNegligible\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePolarity\u003c\/td\u003e\n\u003ctd\u003eNon-polarized\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eRadial through-hole\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHiFi speaker crossover, tube amp coupling, audio filter\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFPP vs Electrolytic vs MKT for Audio\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eFPP (This Product)\u003c\/th\u003e\n\u003cth\u003eElectrolytic\u003c\/th\u003e\n\u003cth\u003eMKT Polyester\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDistortion\u003c\/td\u003e\n\u003ctd\u003e✅ Extremely low\u003c\/td\u003e\n\u003ctd\u003e❌ High\u003c\/td\u003e\n\u003ctd\u003e❌ Moderate\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDielectric Absorption\u003c\/td\u003e\n\u003ctd\u003e✅ Negligible\u003c\/td\u003e\n\u003ctd\u003e❌ Significant\u003c\/td\u003e\n\u003ctd\u003e❌ Low\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePolarity\u003c\/td\u003e\n\u003ctd\u003e✅ Non-polarized\u003c\/td\u003e\n\u003ctd\u003e❌ Polarized\u003c\/td\u003e\n\u003ctd\u003e✅ Non-polarized\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eESR\u003c\/td\u003e\n\u003ctd\u003e✅ Near zero\u003c\/td\u003e\n\u003ctd\u003e❌ High\u003c\/td\u003e\n\u003ctd\u003e❌ Low-moderate\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBest Use\u003c\/td\u003e\n\u003ctd\u003eSignal path, crossover, coupling\u003c\/td\u003e\n\u003ctd\u003ePower supply filtering\u003c\/td\u003e\n\u003ctd\u003eGeneral purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e2-way and 3-way passive speaker crossover tweeter high-pass capacitors\u003c\/li\u003e\n  \u003cli\u003eTube amplifier (valve amp) interstage and output coupling\u003c\/li\u003e\n  \u003cli\u003eAudio preamplifier signal path coupling and tone control networks\u003c\/li\u003e\n  \u003cli\u003eCrossover upgrade: replace electrolytic caps with FPP for audible improvement\u003c\/li\u003e\n  \u003cli\u003eHiFi frequency divider networks in DIY speaker builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eQ: What value do I need for a 3kHz tweeter crossover at 8Ω?\u003c\/h3\u003e\n\u003cp\u003eFor a first-order (6dB\/oct) high-pass: C = 1 \/ (2π × f × Z) = 1 \/ (2π × 3000 × 8) ≈ 6.6µF. Select 6.8µF. For a second-order Butterworth, use a crossover calculator to determine the exact L and C values.\u003c\/p\u003e\n\n\u003ch3\u003eQ: Can I use 250V capacitors in a tube amplifier with 300V B+?\u003c\/h3\u003e\n\u003cp\u003eNo. Always select a capacitor with a voltage rating at least 20–50% above the maximum circuit voltage. For 300V B+ supplies, use 400V or 630V rated capacitors in the signal path.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 250V FPP Metallized Polypropylene Film Capacitor (value per selected variant)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"7.5uF 250V \/ CHINA","offer_id":46966752084203,"sku":"200007763:201336100;688:203122806#7.5uF 250V","price":41.8,"currency_code":"USD","in_stock":true},{"title":"6.8uF 250V \/ CHINA","offer_id":46966752116971,"sku":"200007763:201336100;688:203122840#6.8uF 250V","price":39.14,"currency_code":"USD","in_stock":true},{"title":"5.6uF 250V \/ CHINA","offer_id":46966752149739,"sku":"200007763:201336100;688:203122836#5.6uF 250V","price":35.7,"currency_code":"USD","in_stock":true},{"title":"4.7uF 250V \/ CHINA","offer_id":46966752182507,"sku":"200007763:201336100;688:203122832#4.7uF 250V","price":33.04,"currency_code":"USD","in_stock":true},{"title":"15uF 250V \/ CHINA","offer_id":46966752215275,"sku":"200007763:201336100;688:203122822#15uF 250V","price":64.9,"currency_code":"USD","in_stock":true},{"title":"12uF 250V \/ CHINA","offer_id":46966752248043,"sku":"200007763:201336100;688:203122818#12uF 250V","price":57.46,"currency_code":"USD","in_stock":true},{"title":"10uF 250V \/ CHINA","offer_id":46966752280811,"sku":"200007763:201336100;688:203122814#10uF 250V","price":51.36,"currency_code":"USD","in_stock":true},{"title":"8.2uF 250V \/ CHINA","offer_id":46966752313579,"sku":"200007763:201336100;688:203122810#8.2uF 250V","price":46.58,"currency_code":"USD","in_stock":true},{"title":"18uF 250V \/ CHINA","offer_id":46966752346347,"sku":"200007763:201336100;688:203121807#18uF 250V","price":75.78,"currency_code":"USD","in_stock":true},{"title":"1.5uF 250V \/ CHINA","offer_id":46966752379115,"sku":"200007763:201336100;688:202862835#1.5uF 250V","price":22.14,"currency_code":"USD","in_stock":true},{"title":"1.2uF 250V \/ CHINA","offer_id":46966752411883,"sku":"200007763:201336100;688:202862831#1.2uF 250V","price":20.04,"currency_code":"USD","in_stock":true},{"title":"1.0uF 250V \/ CHINA","offer_id":46966752444651,"sku":"200007763:201336100;688:202862827#1.0uF 250V","price":18.96,"currency_code":"USD","in_stock":true},{"title":"3.9uF 250V \/ CHINA","offer_id":46966752477419,"sku":"200007763:201336100;688:203122828#3.9uF 250V","price":29.58,"currency_code":"USD","in_stock":true},{"title":"3.3uF 250V \/ CHINA","offer_id":46966752510187,"sku":"200007763:201336100;688:203122854#3.3uF 250V","price":27.48,"currency_code":"USD","in_stock":true},{"title":"2.7uF 250V \/ CHINA","offer_id":46966752542955,"sku":"200007763:201336100;688:203122850#2.7uF 250V","price":25.18,"currency_code":"USD","in_stock":true},{"title":"2.2uF 250V \/ CHINA","offer_id":46966752575723,"sku":"200007763:201336100;688:203122846#2.2uF 250V","price":23.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/250v-fpp-film-audio-capacitor.webp?v=1760594951","url":"https:\/\/keszoox.com\/products\/250v-fpp-polypropylene-film-audio-capacitor-1uf-18uf-hifi-crossover-tube-amp","provider":"Keszoox","version":"1.0","type":"link"}