New GRS driver suitable for an ultra cheap THT?

For livingroom sound better than in a theatre.
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Bill Fitzmaurice
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Re: New GRS driver suitable for an ultra cheap THT?

#16 Post by Bill Fitzmaurice »

Another option is a second TT, preferably wider. That will enable placement in two places to smooth in room response.

JensToft91
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Re: New GRS driver suitable for an ultra cheap THT?

#17 Post by JensToft91 »

That would probably be the best solution - but the wife has only accepted subwoofers behind the couch. And I think the THT lower cut-off is my next step up :-) I'm missing it in the TT. The PC12 + TT actually works ok, as the distortion is not audible in movies. Guess I'm just curious about what the THT will do :-)

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AntonZ
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Re: New GRS driver suitable for an ultra cheap THT?

#18 Post by AntonZ »

JensToft91 wrote: Wed Dec 22, 2021 8:16 ambut the wife has only accepted subwoofers behind the couch
My crystal ball sees an additional couch in your future :D

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Bill Fitzmaurice
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Re: New GRS driver suitable for an ultra cheap THT?

#19 Post by Bill Fitzmaurice »

JensToft91 wrote: Wed Dec 22, 2021 8:16 am Guess I'm just curious about what the THT will do :-)
It probably won't do what you want it to if you go minimum width again. That may be what's limiting the TT.

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Re: New GRS driver suitable for an ultra cheap THT?

#20 Post by JensToft91 »

Hmm - i thought the lower tune would make the difference.
I thought width was a sensitivity "issue" - i definitly don't need sensitivity with my TT. At 30 Hz it's a beast - so clean.
I dont have the space for the wider versions unfortunately.
I think I would be satisfied, if the THTLP acted the same at 22 hz, and it dropped below that.

Another couch should fix the problem 😂

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Seth
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Re: New GRS driver suitable for an ultra cheap THT?

#21 Post by Seth »

AntonZ wrote: Wed Dec 22, 2021 12:31 pm
JensToft91 wrote: Wed Dec 22, 2021 8:16 ambut the wife has only accepted subwoofers behind the couch
My crystal ball sees an additional couch in your future :D
:loler: Hahaha too funny.

Jens,
Just to open up some other creative options; if your home has a basement or crawl space, you can have the sub mounted below and have a grated vent in the corner of the room. If you have an attic/crawl space above the room, same thing. What's on the other side of the walls? Perhaps a closet that you could put the bulk of the cabinet in and just open the dimensions of the mouth into the main listening space.
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

JensToft91
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Re: New GRS driver suitable for an ultra cheap THT?

#22 Post by JensToft91 »

Thanks, Seth. Unfortunately I don't have such options. House is for rent, and is too "modern" for these awesome possibilities. I can't imagine how big my subwoofers would be, if I could fill an attic.

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Seth
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Re: New GRS driver suitable for an ultra cheap THT?

#23 Post by Seth »

Just for reference. Min width 12" THT, Max width 12" THT, and a mid sized TT (not minimum like you've built)

Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

JensToft91
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Re: New GRS driver suitable for an ultra cheap THT?

#24 Post by JensToft91 »

I see what you mean. That it might not do what I want.
But on the other hand, a 12 inch can take more abuse than the 8 inch - right? I know the drivers act differently in a horn - and I haven't yet understood how.
My TT is pretty capable at 25 Hz - but I can* hear the ticking distortion, i linked to in a video in another post.
At 25 Hz the THT will be right at home - and then 20 Hz will maybe act as the TT does at 25 Hz, and being a 12 inch it can take more power at 20 hz, so chances of audible driver distortion is less.
Am I wrong in these assumptions?
I don't know if I'm making any sense.

JensToft91
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Re: New GRS driver suitable for an ultra cheap THT?

#25 Post by JensToft91 »

I've decided to put the project to rest for a bit, and use the TT on it's own. The THTLP will be an upgrade from the TT, and i have no idea by how much before I've build it.
My assumption is, that it will have a quite serious headroom, compared to my listening levels - so I think I can EQ it flat to 20 Hz.

The GRS driver is back in stock in March - so that's probably when I'll build it 👍

Thank you all for answers.

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Seth
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Re: New GRS driver suitable for an ultra cheap THT?

#26 Post by Seth »

I wasn't really making a point other than illustrating the difference. To me, it looks as though the THT should do what you want.

Here they are from 20-30Hz


Also keep in mind, the TT has a 4Ω driver, the two TT traces have a 6Ω driver, and the driver you're considering using is an 8Ω driver. Given 2.83 volt signal results in 2watts, 1.34watts, and 1watt.


So, only behind the couch... If you build a full width THTLP (30"), it should come up to just below the back of the couch. Finished well, it would make a fantastic place to put decorations, reading lamps, family photos, etc. as if it were a console table behind the couch. (I'm trying to help sell it for you :mrgreen: ) Full width cabs are nearly free output.
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Tom Smit
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Re: New GRS driver suitable for an ultra cheap THT?

#27 Post by Tom Smit »

Seth wrote: Thu Dec 23, 2021 7:46 pm

So, only behind the couch... If you build a full width THTLP (30"), it should come up to just below the back of the couch. Finished well, it would make a fantastic place to put decorations, reading lamps, family photos, etc. as if it were a console table behind the couch. (I'm trying to help sell it for you :mrgreen: ) Full width cabs are nearly free output.
:lol: :lol: :lol:
Good point though.
TomS

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Seth
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Re: New GRS driver suitable for an ultra cheap THT?

#28 Post by Seth »

Image
Image
Image
Image
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Tom Smit
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Location: Sarnia, Ont. Canada

Re: New GRS driver suitable for an ultra cheap THT?

#29 Post by Tom Smit »

I get the picture......NOOOOOO! YOU GOT THE PICTURE....all four of them! LOL. :)
TomS

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Bryan Cox
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Re: New GRS driver suitable for an ultra cheap THT?

#30 Post by Bryan Cox »

Ooooh. That's a damn good idea, Seth. I was just wondering last night where I'd place home theater subs. 🤔
Otop 12 x 4 (Delta Pro 12-450a) 2x melded, 2x straight
Titan 39 x 4 (3012LF) 20" wide

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