Speaker grill for HTM-10/12 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 17 Old 05-06-2019, 08:05 PM - Thread Starter
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Speaker grill for HTM-10/12

I've been perusing the builds for the HTM series speakers and am starting to get a feel for placement. However in most of the discussions on the HTM series they seem ideally placed behind an AT screen - much to my jealous chagrin. Unfortunately there's no behind screen placement that will be happening for me.

With an HTM 12 L/R on stands, that puts an HTM 12 on the floor and tilted up as the center (hopefully not an awful idea). With curious pets and clumsy people, I am looking for a good way to cover them that may even have some WAF.

Few questions:

1. Are there any performance considerations with the SEOS wave guide if covered by a grill?
2. I've read there is a resister mod for the xo in these for when they are not behind an AT screen - would putting a cloth grill directly on the speaker be similar to being behind a screen?
2. Any DIY cloth speaker grill builds out there? (would love to see them!)
3. I've seen newer speakers use magnets to attach the grill, feasible in diy?

Thanks all!
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post #2 of 17 Old 05-06-2019, 08:27 PM
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I use grills on my LCR which use the SEOS-12, I can't seem to find a more recent photo of them but here is an older one before I swapped the waveguide over to the SEOS.

The grill cloth I've tested won't attenuate the highs as nearly much as screen material does.

Magnets can be done and totally hidden if you recess them in from the backside of the baffle and front of grill.

I'll try and take some photos of some of my more recent grills to show you how I put them together.
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post #3 of 17 Old 05-06-2019, 08:47 PM
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I have no hazard issues wrt protecting the LCR
or WAF or decor "gotta be's"

but I love the look of the horns , as a trio of possible black vortexes,
which, unlike a black hole,
will allow only the best sounding "audio dynamics /attributes" to be broadcast to the known universe
and keep all the undesirable 'elements" forever tucked away , never to escape. It could happen . . .

maybe reading all the Tom Swift books 60 years ago taught me to ask, Why not?

and the grills were left over shelving, with some mods . . and not too much extra work

DIY lends itself to creativity and maximizing that ROI.

and don't forget to have fun, too
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post #4 of 17 Old 05-06-2019, 09:51 PM - Thread Starter
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Quote:
Originally Posted by asarose247 View Post
I have no hazard issues wrt protecting the LCR
or WAF or decor "gotta be's"

but I love the look of the horns , as a trio of possible black vortexes,
which, unlike a black hole,
will allow only the best sounding "audio dynamics /attributes" to be broadcast to the known universe
and keep all the undesirable 'elements" forever tucked away , never to escape. It could happen . . .

maybe reading all the Tom Swift books 60 years ago taught me to ask, Why not?

and the grills were left over shelving, with some mods . . and not too much extra work

DIY lends itself to creativity and maximizing that ROI.

and don't forget to have fun, too
Those look angry! I honestly like the uncovered look as well - but I also prefer my dog not to sneeze on my woofer cones (I swear he does this on purpose).

With all 3 of those under the screen like that do you have any issues with them not being at ear height for MLP?
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post #5 of 17 Old 05-06-2019, 09:57 PM - Thread Starter
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Quote:
Originally Posted by mtg90 View Post
I use grills on my LCR which use the SEOS-12, I can't seem to find a more recent photo of them but here is an older one before I swapped the waveguide over to the SEOS.

The grill cloth I've tested won't attenuate the highs as nearly much as screen material does.

Magnets can be done and totally hidden if you recess them in from the backside of the baffle and front of grill.

I'll try and take some photos of some of my more recent grills to show you how I put them together.
Nice work - those look great. That's basically what I had in mind. Any tips for a simple build would be fantastic!
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post #6 of 17 Old 05-06-2019, 10:49 PM
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despite the very tight look wrt speaker height and the space under the TV,
there is very slight tilt using double felt feet in the front edge of the speaker that over the 11+' to the MLP,
brings "ALL the sound" very very well.

for theL/R, depending on the toe in,
the horns are between 64-66" to 72" C2C .
as i said, for STEREO legacy recordings, the sound field will usually be f'n GREAT,
of course, source dependent
and they needn't get too loud either,
like the HTM6's in my mancave,
the revelation of detail will put a smile on your face every time . ..

i've made this recommendation several times- because as duke Ellington is reported to have said-
If it sounds good, it is good.


and 1 more

for this one, the clarinet is so huge and clear- it's as if the engineers are the real artists . .

enjoy and compare

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post #7 of 17 Old 05-07-2019, 12:08 AM
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@mtbdudex shared some grill builds here...

New to DIY? FAQ's in here
https://r.tapatalk.com/shareLink?sha...8&share_type=t
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post #8 of 17 Old 05-07-2019, 06:14 AM
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I have htm12s and bought the HD black grill covers from PE. They only cover the woofers as thats the only concern I had. Took about 5 min per cover to install. Simple and easy. Mine are in fromt of a treated wall, they are not in a baffle wall. I love the waveguide appearance!
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post #9 of 17 Old 05-07-2019, 07:43 AM
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Quote:
Originally Posted by RoboAVS View Post
I have htm12s and bought the HD black grill covers from PE. They only cover the woofers as thats the only concern I had. Took about 5 min per cover to install. Simple and easy. Mine are in fromt of a treated wall, they are not in a baffle wall. I love the waveguide appearance!
Which ones Rob? The steel ones?
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post #10 of 17 Old 05-07-2019, 08:28 AM
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Quote:
Originally Posted by RoboAVS View Post
I have htm12s and bought the HD black grill covers from PE. They only cover the woofers as thats the only concern I had. Took about 5 min per cover to install. Simple and easy. Mine are in fromt of a treated wall, they are not in a baffle wall. I love the waveguide appearance!
Quote:
Originally Posted by jcmccorm View Post
Which ones Rob? The steel ones?
I have the steel ones from PE (or ebay). They work great. Not sure they don't resonate a bit on some big notes. I take mine off when I listen to music but leave on so the grandkids don't start poking the speaker...cus that's what they do.
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post #11 of 17 Old 05-07-2019, 09:30 AM
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Same, I bought some from PE and also a few from Amazon.
The PE ones are slightly sturdier but both serve their purpose.

I actually stacked myLCR onto my MBMs and retuned them into htm1212s...and put covers on all of them.
I did measure before and after but actually did not compare yet.
I think they have no effect at those frequencies.
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post #12 of 17 Old 05-07-2019, 09:44 AM
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Speaker grill for HTM-10/12

Side bar:
I also read Tom Swift in the later 70’s, my family took a 5 week vacation via full size van towing a 30 foot trailer, Michigan to west coast to Montana and back. My dad borrowed sci-fi books for me to read.
Lots of in car time to kill.
I was 16 1/2, helped drive as my mom was afraid.



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post #13 of 17 Old 05-07-2019, 11:18 AM
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https://www.parts-express.com/parts-...grill--262-864

https://www.parts-express.com/penn-e...4-pcs--262-360

PE has bulk packs of the clamps for half price. I bought just the clamps and used my own #8 screws, i think 3/4 inch. They sell kits with t-nuts and bolts and Ive already learned the hard way im never using a tnut for anything! 👈👏

I hand tightened them to protect the finishes. Easy as can be, drill a small pilot hole then screw them on right over the edge of the drivers.

How strong are they? Easily you could bend one or smash it say stepping on it. Not super thick i think about 1mil, but its easily enough to protect against a vacuum, a kid, a drunken ass-cheek 🙄, a foot, dog slobber, flying kid toys, or a whipped xbox controller due to your frind losing at hockey...again.
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post #14 of 17 Old 05-07-2019, 01:02 PM
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Quote:
Originally Posted by Kpilk View Post
I take mine off when I listen to music but leave on so the grandkids don't start poking the speaker...cus that's what they do.
That's the deal; I've got grandkids of various ages. I'm waiting for the punched-in dustcap.....
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post #15 of 17 Old 05-07-2019, 01:32 PM
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Quote:
Originally Posted by mtg90 View Post
I use grills on my LCR which use the SEOS-12, I can't seem to find a more recent photo of them but here is an older one before I swapped the waveguide over to the SEOS.

The grill cloth I've tested won't attenuate the highs as nearly much as screen material does.

Magnets can be done and totally hidden if you recess them in from the backside of the baffle and front of grill.

I'll try and take some photos of some of my more recent grills to show you how I put them together.

What are those speakers, I love them! I need 7 of those in my life.

Last edited by Remy.Alexander; 05-07-2019 at 01:45 PM.
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post #16 of 17 Old 05-07-2019, 02:53 PM
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^ you're on the right "track"
they look like a precursor /variant of the 88 Special, as my CC in the pic above a few posts

I got 2 of the last ones and use them as SS, mounted of full motion mounts,
good engineering as they weigh in at about 52# and a stud exactly where it needed to be . .

and some for rears would be a complete set of 15" SEOS horns for the bed layer - because
my htm6's are really so fine, fine, fine
a "compromise" of only 7 x 12" SEOS horns
it depends . . .

so what is that speaker?
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post #17 of 17 Old 05-07-2019, 04:26 PM
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^^^^^88 Special are awesome, and that looks a lot alike. Wish I could afford them- but $900+ for three speakers is to rich for my broke back
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