# Capacitors for speaker crossovers **URL:** \ **Category:** Capacitors\ **Tags:** part-identification\ **Created:** [February 6, 2023, 5:49pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382 "2023-02-06T17:49:00Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 6, 2023, 5:49pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/1 "2023-02-06T17:49:00Z")
I am building simple crossovers for the speaker system I’m putting together and the speaker maker recommended 0.5 uF capacitors. I have no technical knowledge so I am trying to determine the exact specs. besides the uF size. ---
**Author:** ![Karl\_1696](https://avatars.discourse-cdn.com/v4/letter/k/9de0a6/32.png) [@Karl\_1696](https://forum.digikey.com/u/Karl_1696)\ **Post date:** [February 6, 2023, 6:21pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/2 "2023-02-06T18:21:46Z")
Hello, take a look at this link. This will be a good starting point. > [@General Capacitor Specification](https://forum.digikey.com/t/general-capacitor-specification/12826): > > Voltage Ratings A capacitor’s voltage rating is an indication of the maximum voltage that should be applied to the device. The context of the rating is significant; in some instances it may indicate a maximum safe working voltage, in others it may be more akin to a semiconductor’s “absolute maximum” rating, to which an appropriate de-rating factor should be applied. Tolerance A capacitor’s tolerance describes the limits of deviation from nominal capacitance value that a device should be expecte… ---
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 6, 2023, 7:04pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/3 "2023-02-06T19:04:25Z")
Thank you Karl. Much appreciated! Myles ---
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 6, 2023, 7:21pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/4 "2023-02-06T19:21:04Z")
Karl, would it be safe to assume that since these capacitors will be used for speaker crossovers (i.e. low voltage & other minimum service limitations) that I should have a lot of flexibility in what I choose? ---
**Author:** ![David\_1768](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1768/32/9762_2.png) [@David\_1768](https://forum.digikey.com/u/David_1768)\ **Post date:** [February 6, 2023, 7:51pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/5 "2023-02-06T19:51:52Z")
mylesparlee1, Different types of capacitors will have different effects in the crossover circuit. Best is to find some design examples, and use that as a plan, of the capacitors to use. As mentioned earlier, you will have to know what max voltage you will be dealing with, with your power ratings, and purchase capacitors rated at a higher voltage. Maybe one of the engineers on the TechForum can add to this post. ---
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 6, 2023, 8:11pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/6 "2023-02-06T20:11:07Z")
Thank you David. ---
**Author:** ![Ryan\_2724](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/ryan_2724/32/1716_2.png) [@Ryan\_2724](https://forum.digikey.com/u/Ryan_2724)\ **Post date:** [February 6, 2023, 10:37pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/7 "2023-02-06T22:37:43Z")
Hi @mylesparlee1 , Thanks for your inquiry. Film might be a good choice. Click [here for another great resource regarding Capacitors](https://forum.digikey.com/t/capacitors/12822). Below are some capacitor options that might be what you need, please review datasheet specifications: [Click here for 338-3441-ND | P12250-ND | 399-F43MN3500ZA01K-ND](https://www.digikey.com/en/products/filter/film-capacitors/62?s=N4IgTCBcDaIMxwBwFo4BY0EZkDkAiABAD4EAKmYYArAAy6ElwCcTyAYmnALI5y00AtAII1MAaXogAugF8gA) Non-polarized/bipolar electrolytics are far more rare, and these would need to be on the pre-amp side (not at the speaker) since they have very low current rating. [Click here for 493-10845-1-ND | 493-12708-1-ND | 493-12735-1-ND | 493-14986-ND](https://www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58?s=N4IgTCBcDaICwE4DMBaAjABgBxwKzpQDkARAAgB9TFU0wB2bAkiq5depfNIsy69RFgBsPEAF0AvkA) ---
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 6, 2023, 11:40pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/8 "2023-02-06T23:40:56Z")
Thank you Ryan. ---
**Author:** ![mylesparlee1](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@mylesparlee1](https://forum.digikey.com/u/mylesparlee1)\ **Post date:** [February 8, 2023, 5:05pm UTC](https://forum.digikey.com/t/capacitors-for-speaker-crossovers/28382/9 "2023-02-08T17:05:44Z")
Good afternoon David. I am hoping you can help with this. I am not able to source out .6 mH crossover coils on DigiKey. Is it possible they aren’t available? Thanks, Myles