How big does your port need to be? (Apologies to everyone for the missed innuendo opportunities)

[@KeithCopeland778]

It's very refreshing to hear how and why a speaker cabinet is or isn't effectively reproducing BASS instead of marketing descriptions!!! I really trust Alex and will show the ultimate trust by buying one of his Super Compact T cabs in the coming months!

[@TimpBizkit]

Although you talk about the excursion of the speaker a lot, the highest port velocity is at tuning where the cone isn't moving much. I'm curious as to why the hybrid resonator ports don't need to be as big, but it could be related to having two tunings spread out.

[@rockhardrocktrue]

Hi Alex. Just bought your super compact. Loving these videos. Super geeky, and I am learning so much. Thank you!

[@TimpBizkit]

I have found that with plenty of port, the box just keeps getting louder and louder and punchier as you turn it up, rather than the bass lagging behind and getting mostly mids and highs. Horn cabs also do this well as they are one big "port". I used to blame it on Fletcher and Munson loudness curves, but actually they favour the bass getting more prominent at higher levels - or at least between very quiet and medium levels. Some amps do have some internal dynamic EQ that rolls back the bass at higher levels to extend headroom and avoid stressing the speakers at higher levels.

[@gushutchinson8758]

I really want to hear you explain the basic principles... I'll keep watching till it sinks right in... Gratitude expressed.... Now!! .. Feeling it Alex? Feeling the love and appreciation...??...

[@TimpBizkit]

The speaker in my Marshall MG15 seems to be able to move more than that. It was a bit stiff at first, but played some deep house on an external amp through it raising the volume gradually. The "threshold of farting noises" gradually rose as it broke in. I'm not sure how much difference it makes to the guitar sound though. It was probably moving about 4mm each way by the end, though that was likely outside of Xmax.

[@papablue3015]

Good information! Thanks

[@richwallace6854]

This video made me wish to learn how to calculate what knowledge would be needed to design "tuned ports" . I'm weird like that.---

[@travishaynes1180]

I think , as surprising as it may be , not everyone knows exactly how a speaker produces sound .

[@miketuss5965]

What about putting you v port you do on the 1x12 or 1x10 you do behind the port or behind each speaker so the amount of air is dispersed. mabey a stupid costly idea but I would love to see those speakers in a well built cab in a 4x12 guitar cab or a 2x12 built with the idea port v vent . I had 2 serious head injuries so its possible its a real silly idea. I know a Mesa Boogie 4 x 12 cab with 2 with 2 old Altec 12"on bottom and 2 Eminence Swamp Things on top sounds so good I am so my brothers cab kicks my 2x12 boogies butt . LOL The Manowars on to sounded great too .I love you company I hope to afford a 4x12 or 4x10 or 2x10 aand2x12 in 4x12 cab depending on your opinion.

[@gushutchinson8758]

I'm going to keep watching this till in sinks in.. I'm like Dracula!! Wear garlic and grab some crosses a silver bullets, stakes, mirrors oh yeah and sunshine.. Everyone is critically deficient in vitamin D in Britain and world wide its serious for our immune system function... Reference Dr John Campbell you tube.. Regards... Gus x

[@oliverlambson]

Would love to hear a comparison between your philosophy behind the Reality 112 vs. the Kemper Kab!

[@BarefacedAudio]

“That would be an ecumenical matter!”

[@TheBolt3366]

I'd be interested to hear your thoughts on powered bass guitar speaker cabs.

[@BarefacedAudio]

Now that pedalboard/modelling rigs are more and more popular it seems a good way of doing a combo much better! Let's get the first bass amp finished and then we'll see what happens...

[@TheBolt3366]

There aren't many powered bass cabs made for bass guitar out there. Wayne Jones, comes to mind. I'm sure there are a few others out there. But, PA cabs just don't cut it when using a modeling pedal. I could see a powered bass cab, at a decent price, catching on. Just my two cents

[@BarefacedAudio]

At the moment we have a lot of people using our 12XN cabs for modelling, either the Super T versions or the "Big 2/3" versions. Just pair them up with a head (use the FX return to bypass the preamp) or a power amp. Works really really well! I agree that unless you're using very expensive high-end PA cabs they're rather feeble for bass guitar (unless you bring a subwoofer too) and even then something doesn't always feel right. I currently run my pedalboard straight into a dual BB3 stack via a power stage.@@TheBolt3366

[@Gyllbonus]

Do ports matter w/ the avd cabs.... specifically to the 212 horizontal?

[@BarefacedAudio]

I think I address the port in the Radical 212H in the vertical vs horizontal 212 comparison video. Have a watch and let me know if it answers your question!

[@kenthomas1613]

Hi Alex. Does it matter if there's a port on the front and the back of a cabinet? Will this probably cancel the low frequencies being produced, will it increase them, or perhaps help spread the low frequencies even further? Thanks for the videos!!

[@BarefacedAudio]

It makes close to no difference. That’s something for another video!

[@kenthomas1613]

@@BarefacedAudio I thought it might be interesting to find out what the result would be. The question came to mind when I saw a picture of PS Audio’s new loudspeakers with the passive radiators on both sides of the loudspeaker cabinet and bass drivers on the front. Interesting choice of design.

[@manitobamanitoba1796]

2 sundown x18v3....14 cubic feet box at 32 hertz.....can I use three 6 inch ports at 11.56 inches to reduce port displacement.....or do I need four 6 inch ports at 16.87

[@BarefacedAudio]

I could work it out but I’d have to charge you a consultancy fee! 😜

[@dominikklepac3596]

So how big what size of inches or centimeters i wath all video but you didnt tell what size i have box 36x45x50 cm so what size hole i have two speaker 90w two speaker 100w so 4 speaker of 6 inches

[@BarefacedAudio]

Depends on the port tuning frequency and the volume displacement of the drivers.

[@mikemattocks9044]

You mentioned port area. Is this cross sectional area of the opening. When thinking about air, volume comes to mind.

[@BarefacedAudio]

Yes, cross-sectional area of the port (wherever it’s smallest in the case of a port with varying geometry).

[@carpediemarts705]

@@BarefacedAudio I think he's trying to say area and depth, the cubic volume in the port. So is port depth vital? Or is it enough to have the right sized hole in the cab?

[@BarefacedAudio]

Carpe Diem Arts Port depth and port area both affect the tuning frequency so both matter.

[@kennethhogan6417]

I’m wondering if there’s a noticeable difference in sound between a speaker getting into over-excursion vs the port turbulence you are describing. Because I have definitely experienced this! And looking back, I’m not sure phenomena was giving me more trouble.

[@kennethhogan6417]

Either way, the bottom end craps out right?

[@kennethhogan6417]

I used to play a mess bass 400 (around 200 watts all tube) into and Aguilar 2x12 and 1x15 and I was surprised that even with only 200 watts, that stack of speakers just couldn’t put out the solid bottom end when I hit a loud low note, even with just a 4 string bass. So maybe the drivers only had 3 or 4 mm x-max, or maybe the ports were too small….

[@BarefacedAudio]

@@kennethhogan6417 When the port can't move enough air you lose the lows but the rest of the tone doesn't really change, whilst when the speaker can't move enough air you lose the punch in the mids as well as losing/compressing the lows. Might be a bit of both!

[@kennethhogan6417]

Thanks, that’s really helpful!

[@ryanstark2350]

Why don't you have a look at making isolation speaker cabinets or rather something that just drops the volume enough? I know these are not ideal but many of us can't make lots of noise. You could maybe put some of this knowledge to use to make them perform a bit better.

[@PooNinja]

Ya think guitarist would fight more over silliness like Tone paper and the pros and cons of metallic dust covers for whatever tone there chasing this week? I agree I like that massive thump the almost knocks the breath from your lungs. I’m thinking of adding tactical transducers to my vehicle to not only add feel to my lows but also some road- noise/tire hum canceling. How do you feel about the bass platforms for stage use? My preference is still vibrating air, while admitting vibrating the seat or platform has its place this being the Silent stage era of IEM and modeled equipment.

[@Elnufo]

i did watch this video waiting for an answer to the question that is the title of this video. But there was no answer, all i got was you rambling about ports in general and how awesome your cabinets are. Dissapointing!

[@BarefacedAudio]

Are you sure I didn’t answer it? It’s all to do with max port air velocity! That will depend upon the volume displacement of the driver and the tuning and Q of the system. They’re usually too small!

[@Elnufo]

@@BarefacedAudio The title asks how big should ports be. You said they need to be big enough. Thats not an answer. That is the type of sentence you would find on the back of a rip off calendar sheet. An appropiate answer would have been like "use 1/3rd SD" or something like that. So no, you did not answer the question from the title.

[@BarefacedAudio]

@@Elnufo but 1/3 Sd is NOT the right answer. There is no one answer and the answer is complex and depends upon a whole lot of specs and design decisions and goals. I made this video over two years ago and can’t recall what I said but it’s taken this long to get a negative comment…

[@Elnufo]

@@BarefacedAudio Glad i could help.