‘Overhung’ vs. ‘Underhung’ speaker voice coils

[@Toid]

This was a great video! I absolutely loved it! 💯

[@zarboaudioprojects1430]

Thanks a lot Mr Toid!

[@davidmulford3828]

This is such a clear, concise explanation. Well done!

[@zarboaudioprojects1430]

Thanks, and thanks for watching!

[@Pentenfi]

Even though I knew about these terms already, this still gave me some knew insight. Very valuable information put together nicely. Great work!

[@zarboaudioprojects1430]

Thanks! Glad you enjoyed it!

[@joshuakemp1439]

One of the best info videos ive seen to date. Thank you for this . I learned something new.

[@zarboaudioprojects1430]

Thank you!

[@griffiiin]

You explained this exceptionally well in a short amount of time, kudos!

[@zarboaudioprojects1430]

Thanks! And thanks for watching.

[@pim_kahlert]

Hi Thomas, Great effort educating the newlings! Animations can absolutely help to give insight in what is actually hapening inside a woofer. However in my opinion you may have oversimplified it a bit. In an underhung construction, the voicecoil is actually shorter than the magnetic gap height. The animation showed a voicecoil that is still longer than the magnatic gap, which by definition is overhung. Decreasing the coil length in this example would only mean less Xmax or otherwise losing control sooner rather than later. The diameter of the VC doesn't have anything to do with being overhung or underhung, neither does the amount of magnets determine the height of the magnatic gap. This is determined by the height of the top plate and matching pole piece. (a long voicecoil is heavy and thereforre lowers effiency, a large magnet stack can improve BL to regain some efficiency) Although it may be more technical, if a followup is comming, please include a visual representation of Xmax for both underhung and overhung designs.

[@joshuakemp1439]

Hey we perffer to be called noobs lol jk great video though

[@zarboaudioprojects1430]

Thanks for watching and commenting! Yes, I had to keep things simple for a simple explanation. Like I said there is more to it, and it was a lot to squeeze into 3 minutes... originally was supposed to be 2 minutes but no way I could do that.

[@pim_kahlert]

@@zarboaudioprojects1430 thanks for your reply. Yes, there is only so much you can do in a limited time. Looking forward to your next projects and videos!

[@BostonMike68]

Interesting video. I actually just got a version of Vance Dickasons loudspeaker cook book and was reading about that. Thank you for taking time to make the video.

[@zarboaudioprojects1430]

I have that book, and I read portions of it just about every year. Great book. Thanks for watching and commenting.

[@BostonMike68]

@zarboaudioprojects1430 I kinda figured you had it . I been designing some really nice speakers without it but it's just going to give me more knowledge.

[@umtbozkr2358]

Very nice and clear explained!

[@zarboaudioprojects1430]

Thanks a lot!

[@geotebs1]

Would anyone know if JBL Le5 midrange speakers are configured as underhung?

[@jamesdouglaswhite]

Nice, thanks for the great info.

[@zarboaudioprojects1430]

Your welcome, thanks for watching!

[@DIYAudioGuy]

I liked, I shared, I subscribed, and I commented.

[@zarboaudioprojects1430]

You're funny Justin! Thank you for that.

[@MauiSoundsCarAudio]

Awesome info, thank you

[@zarboaudioprojects1430]

Thanks for watching and commenting!

[@glasssswan]

Thanks for this!

[@zarboaudioprojects1430]

My pleasure! Thanks for watching

[@luca_rr4660]

Have 2 pair of underhung speakers, both sound amazing.

[@moti_vati0n]

Explanation is unclear. Underhung voice coil means that the coil is shorter than the front plate. And liinear excursion means that: 1. In case of overhung coil front plate is fully within the range of coil wire. 2. In case of underhung coil the coil itself is completely inside the space between the ends of the front plate.

[@zarboaudioprojects1430]

I simplified things for time, but I did have an underhung driver as a reference for my examples... driver construction. Does differ model to model. Thanks for the comment!

[@Herman-f9m]

That second illustration is not an underhung voicecoil. Overhung and underhung refer to whether or not the voicecoil hangs out the magnetic gap. When the voicecoil hangs out, that's overhung. When it doesn't, it's underhung. Neither of these illustrations shows an underhung coil.

[@zarboaudioprojects1430]

The illustrations were to show the difference between the long voice coil extending far outside the magnetic gap, and the short voice coil staying (mostly) inside the gap... I used a known (underhung) driver to model off of. It's not a perfect illustration, sure, but I think it adequately illustrates the difference. Thanks for the comment.

[@mahmuta23]

Also spider

[@GrainGrown]

"exetera" okay yankee

[@nobelstone9714]

The video is WRONG. Both examples, the over hung voice coil and the 'under hung' voice coil in the drawings are over hung. An over hung voice coil is longer than the magnetic gap. But an under hung voice coil is SHORTER than the magnetic gap. In both drawings the voice coil was longer than the gap.

[@zarboaudioprojects1430]

Thanks for the comment, I think you're maybe looking a bit too close. The magnetic lines are there to give a rough idea of where the 'bulk' of the magnetic force is located.

[@nobelstone9714]

@@zarboaudioprojects1430 Sorry but the drawing for the under hung coil is over hung

[@zarboaudioprojects1430]

@@nobelstone9714 Okay, I won't argue. My drawing isn't perfect, I agree -- but it does demonstrate the basic idea.... and it was taken basically from a known 'Underhung' driver. Thanks for the comment.

[@nobelstone9714]

@@zarboaudioprojects1430 But the drawing is incorrect.

[@elviscaragea4433]

​@@nobelstone9714 yeah underhung is when the vc doesn't leave the magnetic gap but then the magnetic gap is less focused? So less bl, then what s good for? Even bl curve?

[@siarez]

You visualizations and explanations are all wrong.

[@zarboaudioprojects1430]

It was a simplification for sure! Thanks for watching.