Home Forums DIY Speakers and Subwoofers Complete newbie looking to build two towers, eventually 5.1

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    Moink
    Participant

    Hi All, I found Toids channel recently and am very interested in building some towers. I’d love to build something like Uglies. My rough goal is build full range towers with a maximum height of 36in or so. My room is 19 x 19ft with 8.5ft ceilings, but is also open to the kitchen, split level stairs and hallway. It’s a big area. I have a Denon AVR-S960H to drive these.

    I’m open to kits, but also excited to dive in and try from scratch. Do you think it’s possible to build a 3ft tower with 2x 8in woofers and a tweeter? Or will the height limitation make 6.5in woofers more realistic. If you know of any other similar builds, I appreciate any links.

    After the towers, I’d love to build a matching center, maybe with smaller brother 6.5in woofers.

    I really appreciate any input/guidance. Thank you!

  • Complete newbie looking to build two towers, eventually 5.1

    jrand updated 1 month, 4 weeks ago 6 Members · 6 Replies
  • sb-woo

    Member
    April 20, 2022 at 1:58 pm

    I dont see why two 8″ woofers wouldn’t work. I’m a fan of Dayton Audio Two 8″ RS woofers will get you down to around 30hz in less than 2.5 cubic ft. That should be around what you’re looking for. If you want to do some quick and easy box calculations you can use an app on your phone called speaker box lite. That is a pretty big room though so you may want to take that into consideration.

  • 123toid

    Administrator
    April 23, 2022 at 11:51 pm

    I’m working on something right now using the Dayton Epiques. It is not going to be a cheap build, but it should be pretty epic (see what I did there?). Part of the issue with recreating the Uglies is finding a driver that can really handle the power and have that type of low end excursion (and capability). The Epiques are one of the few that fit the bill.


    Complete newbie looking to build two towers, eventually 5.1

  • tvor-ceasar

    Moderator
    April 24, 2022 at 10:47 am

    For 8″, this RS225 in series would sit at about 34 Hz in a 3 CuFt box and the response chart is fairly flat out to about 1800 Hz. Probably not a bad choice to start designing with. Though I’m still not sure how to deal with telling WinISD how to connect the drivers – I think multiples are, by default, connected in parallel. That would affect how SPL and excursion are calculated, AFAIK. @123toid , do you have any input on that aspect?


  • Moink

    Member
    April 27, 2022 at 9:56 am

    I really appreciate the responses. I’m curious to see what you come up with for the Epiques. I should take a look at the 7in version. I was only really considering 8in.

    So far I’ve had the best luck with the RSS210HO-4 8ins in WINISD. I can keep the box 1.5-2ft3. I can use a linear vent that is 1 x 9in (length will vary on tower size, but I can 90 it vertically in the box). The issue is the cone excursion. If I try a lowpass filter the curve falls apart. To tvor-ceasar’s point, I’m not sure what happens with a series vs parallel. If I adjust the speaker parameters, there is a series/parallel option. It just doesn’t look any different, which I sure isn’t right. Another issue is finding a sub that will go up to 1500-2000Hz + so there’s room to crossover a tweeter.

    I’m wondering if possible to come up with something that will do 25-35Hz for under the cost of the Klipsch 8000Fs ($500/per on sale). Either way, I’m definitely having a lot of fun tinkering.

  • elliottdesigns

    Member
    April 29, 2022 at 6:35 am

    Could you show a graph of how the response “falls apart”? That would be helpful for understanding so we can troubleshoot that. You can definitely get 25-35hz for that price point, it just depends on what quality of driver you want, enclosure volume and shape limitations (we already have this, but what manufacturing/tooling abilities do you have to your disposal?), needed SPL, how much power can you provide. Etc, etc. Those are the kinds of details that need to be considered.

  • jrand

    Member
    May 2, 2022 at 11:33 am

    Hey, I just posted the first steps of my first build which uses the RS225 (but a single one) and I am hoping that they will get as low as 30 Hz. From all the reviews I’ve seen, it seems that the RS225 can easily hit that at a great price point.

    My current design’s height is 3.4ft but it includes a dedicated stand, which can be extremely shortened to make the speakers be at a minimum of 2.6 feet, or if you choose to make the port be back firing, then they are only ~2.35ft. Its internal volume will be ~1.7ft³.

    May I ask if you did not mistake when introducing a filter? I check winISD by adding a high-pass filter, not a low-pass filter.