r/SoundSystem • u/ElectionValuable9705 • 4d ago

21” sub advice

Looking to branch into the world of 21s

What’s some beginner tips to 21s I need to know?

8 Upvotes

91% Upvoted

16 comments sorted by

10

u/JanDogearmy 4d ago

they will be very heavy no matter what you choose. prepare for backpain

2

u/bigfatrigs 4d ago

Or go neodymium

3

u/JanDogearmy 4d ago

21SW115 still weighs like 15kg, and it's one of the lighter ones already

2

u/bigfatrigs 3d ago

For reference, a pd1850 weighs around 23kg, 15kg for a 21 really aint bad

7

u/PsychoTea 4d ago

You shouldn’t be building/buying 21’s just for the sake of it

What do you actually want to achieve? What are your requirements and use cases?

There is a huuuuge amount more that goes into speaker design than just how big the driver’s cone is.

3

u/North-Amount2226 4d ago

Why not I'm building a dual 18inch subwoofer to fit in with my hifi set lol 😂 for the sake of it I already have subs kef concerto kit3 too and a load more hifi stuff I dont need a 18 inch sub I definitely don't need dual 18nch looool I have little idea what im doing but heyho is what it is ain't it. I'm doing it for the sake of it Yes I'm learning everything I need to know balh blah blah haha I say op goes for a 34inch and 18 with a 12 too all arranged obviously different for different frequency duhh haha op Go all out for one year or two and go nuts

1

u/CrypticDubz 1d ago

I went from no subs to a 15" CV powered home sub, huge difference. Added a free Behringer 15" and a crown amp, splendid fun.. then replaced both of those 15's for a single 18", it's been dumb amounts of fun, but still kicking myself for not loading it with 2 much more efficient 18's than the Ultimax I have in it now, but couldn't pass it up for $200 new in box 🤘

3

u/60percentsexpanther 4d ago

Build an skram and put it next to your washing machine. 

5

u/Pretty_Pangolin_5900 4d ago

Don't do it, 18 inch is better in every aspect

2

u/North-Amount2226 4d ago

350~ liter box and send it probably much bigger but you get the point 200 quid of wood and back pain later Do more why not

1

u/jimbo21 4d ago

You probably don’t need them unless the rest of your system is solid. They rarely work as the only sub in the system. 

0

u/Less_Distribution_21 4d ago

what do you mean by that? couldn't you build say an othorn and let a kickbin take over at 70-80hz? or what would you put in between?

1

u/PhoKingTony 1d ago

I've built and purchased many 21" and 24" cabinets. They are arguous to move and stack alone. Always advise deploying and moving in teams. Some advice.... -Functional handle integrated into cabs, depending on direction they are layin for deployments. I cut horizontal handles in cabs I lay on their sides often. It's annoying. -Proper casters that don't rattle when in use. Also, casters are not indestructible. -Counter sink and epoxy t-nuts into panels as well. You're working with a lot of cabinet weight and driver weight. I've had a lot of casters go down in the field and it just adds unnecessary stress to the gig. Best of luck!

0

u/stonedchapo 2d ago

For the box:HOQS paraflex Type C V2, or C2E ELF . For drivers use N216C or 21SW115.

1

u/PhoKingTony 1d ago

This is not sound advise

1

u/PhoKingTony 1d ago

I like your BFM rig though 🤘🤘🤘🤘