18" HST 18 MKII or 24" HS24 MKII? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 26 Old 09-20-2017, 09:00 AM - Thread Starter
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18" HST 18 MKII or 24" HS24 MKII?

I am planning on building a couple of sealed subs. The room size is 19x15x7.5 and the room usage is both for music and movies (40/60). I was originally planning on getting a couple of SI HST 18" MKii, but looking at the recent build, I am also interested in the HS24 MKii.

For my room, which of the two would be better? Will the 24" be overwhelming? will the 18" be sufficient? I am looking for tight musical low frequencies. I am not looking for overkill (maybe ).

Please share your thoughts and suggestions.
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post #2 of 26 Old 09-20-2017, 10:29 AM
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If the 24"s are in your budget and size constraints I would grab those. If they are too loud....... never mind, get the 24"s.
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post #3 of 26 Old 09-20-2017, 10:32 AM
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Quote:
Originally Posted by Tuning View Post
I am planning on building a couple of sealed subs. The room size is 19x15x7.5 and the room usage is both for music and movies (40/60). I was originally planning on getting a couple of SI HST 18" MKii, but looking at the recent build, I am also interested in the HS24 MKii.

For my room, which of the two would be better? Will the 24" be overwhelming? will the 18" be sufficient? I am looking for tight musical low frequencies. I am not looking for overkill (maybe ).

Please share your thoughts and suggestions.
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post #4 of 26 Old 09-20-2017, 10:35 AM
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The only reasons I can think of to get the 18 over the 24 would be space or budget constraints. Otherwise, get the 24.
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post #5 of 26 Old 09-20-2017, 11:11 AM
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Originally Posted by JohnDean View Post
The only reasons I can think of to get the 18 over the 24 would be space or budget constraints. Otherwise, get the 24.
he said couple of 18s... having multiple subs lets you place them to even out room modes.
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post #6 of 26 Old 09-20-2017, 12:41 PM
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Originally Posted by notnyt View Post
he said couple of 18s... having multiple subs lets you place them to even out room modes.
lol. I don't see where he said he'd only get 1 24.

Here's my corrected statement...

The only reasons I can think of to get the 18s over the 24s would be space or budget constraints. Otherwise, get the 24s.
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post #7 of 26 Old 09-20-2017, 12:58 PM
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What is your current electronics setup? Do you have a sub and are upgrading? What will these be powered with? As others have mentioned, are you comparing two 18"s to two 24"s or two 18s and one 24? Just trying to get a clearer picture.
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post #8 of 26 Old 09-20-2017, 01:35 PM - Thread Starter
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Currently own a seaton submersive. I was thinking of either 2 18" or a single 24". Would love to go dual 24, but budget constraints

The sub will be powered using speakerpower amp.
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post #9 of 26 Old 09-20-2017, 08:22 PM
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post #10 of 26 Old 09-21-2017, 04:57 AM - Thread Starter
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If i get a speakerpower 4000w plate amp, can I use that to power two subs by connecting the dvc of each in series and the subs in parallel for a 2 ohm load on the amp? Or should I go for a separate amp for each box? This will help me identify which of the subs to get as well.
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post #11 of 26 Old 09-21-2017, 11:01 AM
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It looks to me like the plate amps have a slave out to power a second sub. I'd also suggest 2 HST18's over a single 24, unless you're also keeping your submersive.

Maybe @SpeakerPower will pop in and clarify.
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post #12 of 26 Old 09-21-2017, 11:20 AM
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Quote:
Originally Posted by Tuning View Post
If i get a speakerpower 4000w plate amp, can I use that to power two subs by connecting the dvc of each in series and the subs in parallel for a 2 ohm load on the amp? Or should I go for a separate amp for each box? This will help me identify which of the subs to get as well.
the amp outputs are paralleled. So if you have two 4 ohm units hooked up to it, load will be 2 ohms, good to go.
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post #13 of 26 Old 09-21-2017, 02:30 PM
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Originally Posted by notnyt View Post
the amp outputs are paralleled. So if you have two 4 ohm units hooked up to it, load will be 2 ohms, good to go.
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post #14 of 26 Old 09-21-2017, 02:51 PM
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post #15 of 26 Old 09-22-2017, 03:22 AM
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I agree, dual subs are always better then a single, but if you think you will ever have the budget to add a second 24 down the road.... go for the 24's, they are just crazy fun!
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post #16 of 26 Old 09-22-2017, 03:35 AM - Thread Starter
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Thanks for all the responses. Very much appreciated. Will start a build thread once I decide and get going.
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post #17 of 26 Old 09-22-2017, 10:05 AM
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Get'em all. 2 18's and the 24. PayPal Credit rules.
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post #18 of 26 Old 09-22-2017, 02:26 PM
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Whatever you do, try to future proof yourself. Keep in mind...since you are even looking at these options, there is a high statistical probability that 2 18's, 1 24, 2 24's or whatever else isn't going to be enough for you in the long term...

If smoothing on a budget is your primary concern, seems as though the 18's would be your best bet.

Just have fun with it...
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post #19 of 26 Old 09-23-2017, 02:01 PM
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If the SI-24's are anything like the 24 I have, I'd say 24's for sure. There is just no comparison. They walk all over the 18's...

Maybe start with one 24 hanging off the submersive plate, and then add a second 24 later with both on a dedicated speakerpower amp.
That would free up the submersive plate to hang a 3rd 24 off of it.
Then take the submersive cone out and throw it in the garbage and tie into its leads for a 4th 24!!!
Ok, I probably took it a step too far on that last part... (or did I? )
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post #20 of 26 Old 09-24-2017, 09:10 AM
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Quote:
Originally Posted by BassThatHz View Post
If the SI-24's are anything like the 24 I have, I'd say 24's for sure. There is just no comparison. They walk all over the 18's...

Maybe start with one 24 hanging off the submersive plate, and then add a second 24 later with both on a dedicated speakerpower amp.
That would free up the submersive plate to hang a 3rd 24 off of it.
Then take the subversive cone out and throw it in the garbage and tie into its leads for a 4th 24!!!
Ok, I probably took it a step too far on that last part... (or did I? )
I mean...do you have SI 24's or not? Or do you have one of Mark's products?
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post #21 of 26 Old 09-24-2017, 11:11 PM
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That's classified... NOFORN/TS/SCI/SAP//UNACK ZEBRA

Spoiler!
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post #22 of 26 Old 09-24-2017, 11:57 PM
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Oooohhhhh ya I reminder following that 24 you ordered religiously. Cost more to ship than buy if I reminder right. We still need to order a freighter full of them 😀
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post #23 of 26 Old 09-26-2017, 06:55 PM
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Oooohhhhh ya I reminder following that 24 you ordered religiously. Cost more to ship than buy if I reminder right. We still need to order a freighter full of them
Yeah, roughly $13000, plus import fees, plus the cost of double shipping them all over USA/Canada + whatever handling fees that may or may not be required, and that doesn't take into consideration any buyer risks, shipping risks/insurance, or overhead for defects, or temporary storage costs after container unload.

Might be easier to just buy some from SI or Mach5; let them worry about the supply-management, shipping-mangement, funding and bankruptcy.
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post #24 of 26 Old 09-27-2017, 03:31 PM
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Originally Posted by BassThatHz View Post
Yeah, roughly $13000, plus import fees, plus the cost of double shipping them all over USA/Canada + whatever handling fees that may or may not be required, and that doesn't take into consideration any buyer risks, shipping risks/insurance, or overhead for defects, or temporary storage costs after container unload.

Might be easier to just buy some from SI or Mach5; let them worry about the supply-management, shipping-mangement, funding and bankruptcy.
Que?

Got the TSP's for this driver you picked up?
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post #25 of 26 Old 09-27-2017, 06:50 PM
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Got the TSP's for this driver you picked up?
It's in my thread from a few months back. (I'll let you AVS-Search for thread creations, I'm in lazy-mode atm.)
It measured fairly well.

The beefiest subwoofer I own.
Heavier and beefier than the LMS-18's and the MalX-21's I have; and those are no slouches...

My only complaint is that the cone/cap isn't CF or GF, which is my preferred material of preference. (I guess you don't get what you don't pay for. )
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post #26 of 26 Old 10-02-2017, 06:39 AM
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Quote:
Originally Posted by BassThatHz View Post
It's in my thread from a few months back. (I'll let you AVS-Search for thread creations, I'm in lazy-mode atm.)
It measured fairly well.

The beefiest subwoofer I own.
Heavier and beefier than the LMS-18's and the MalX-21's I have; and those are no slouches...

My only complaint is that the cone/cap isn't CF or GF, which is my preferred material of preference. (I guess you don't get what you don't pay for. )
By far....the laziest post you have ever written.
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