[jparaja]

Hi, I plan on building my 1st sonosub with the Dayton RSS390HF-4 15IN. Have any of you used this driver? If so, what diameter sono tube should i buy. I would like a tuning freq. of 16Hz. Thanks for your help.

 

[Mike P.]

11 cu.ft works well with the 16 hz tuning. What amp will you be using?

 

[jparaja]

Thank you for replying. I will be using an behringer EP2500 for 2 sonosubs:unbelievable:

 

[keelay]

Thanks for the thread. I've been planning to build a Dayton RSS390HF-4 LLT 12CF tuned to 16 Hz as well. Not necessarily sonotube, but close enough. I have been convinced by the reviews on this sub that it is for me. It will also match well with my Natalie P mains (Dayton RS drivers). So, I will be following along. If you need the WinISD file for the RSS390HF let me know and I will PM it to you.

Thanks,

Kyle

 

[Mike P.]

You're going to have to be careful using a EP2500 for this. The sub will reach Xmax with 250 watts. You will also need a high pass filter (rumble filter) at 14 hz to protect the subs from over excursion at the lower frequencies. Consider the Reckhorn B1 or E.D. eQ.2, about $100.

With room gain you can expect 110-112 db down to 16 hz. For porting you can use a 6 inch diameter tube 23 inches long or two Parts Express 4 inch flared ports 22 inches long.



Depending on how wide and tall you want your tubes, here are the measurements for a 20 inch diameter tube....


a 22 inch diameter tube....


and a 24 inch diameter tube. Your choice.

Note the sub used in the program is the Dayton Reference, it was used for mounting depth purposes only.

 

[jparaja]

Mike, thanks for the valuable info. Which one of those tube diam. would you use? I have an AudioControl Phase coupled Activator Series III crossover with 24db/oct. Linkwitz Riley and it has a rumble filter. Can I use it?

 

[jparaja]

Hi Kyle, I can use the Winisd file. What do you mean by PM? I'm new to all this forum talk:doh:

 

[keelay]

PM stands for Private Message. Most Forums support a private messaging system for forum members to communicate together without exposing personal emails. In your case the private messaging has not been setup or is not active. Click the username link in a post and a list of options comes up with private message (usually) being one of them. I sent you an email detailing how to get the WinISD file.

Thanks,

Kyle

 

[jparaja]

can I safely go down to 14hz tuning freq?

 

[Mike P.]

You can but there's not much reason to. Compared to a 16 hz tuning you would be giving up a couple of db in the 18 hz to 30 hz range for a slight gain from 15 hz down where there's not much happening. Just my opinion.

 

[jparaja]

Thanks Mike. Sounds like 16Hz is the sweet spot.