Open Baffle Sub

[ejk]

I was at a friend's house last weekend and after a number of years he finally had his subs dialed in properly. He has sealed subs and the effect was astounding. I could feel a bow going across the double bass on my skin. It wasn't bloated or overdone, it was just right. I have open baffle speakers, and I play the same song at home and the bass is fine but not what I heard then. I am toying with the idea of Gr Research Double Trouble sub which is a open baffle design. I have tried subs in the past with box speakers but always got rid of them due to having to always play with the settings which is always a pain in the ass. My bass is very good to excellent with my speakers now, just looking for the extra 10%. It isn't cheap so I would hate to have buy and do whatever with them if it didn't work out.

https://gr-research.com/product/sub-series-double-trouble-with-flatpacks-copy/

[HAL]

The open baffle 12in H-Frame servo subs work well in rooms if you have at least 3ft from the rear of the cabinet to the front wall.  They need space for the dipole radiation pattern to work.  I typically have them 4ft from the side walls as well.  I aim them at the listening seat for the peak of the figure 8 to be pointing at me.

Depending on room size, is what drives the need for extra excursion for 2x12, 3x12 or larger. 

In nearfield, I put my Magnepan LRS+ on top of a 1x12 modular H-Frame that I bought flat packs from captainhemo/Jay.    Works for LRS as well.  This way they are time aligned if the planars are vertical. 

I do use a dspNexus 2/8 and have done just sub DSP EQ and speaker correction for shows with great sound quality with Class D amps.  I use REW to do the room bass manangement measurements and then EQ the subs below 200Hz (around the Schroeder room frequency) with the recommended filters that it can generate.

It is not a HT sub with special effects.  Very musical indeed.

[ejk]

The open baffle 12in H-Frame servo subs work well in rooms if you have at least 3ft from the rear of the cabinet to the front wall.  They need space for the dipole radiation pattern to work.  I typically have them 4ft from the side walls as well.  I aim them at the listening seat for the peak of the figure 8 to be pointing at me.

Depending on room size, is what drives the need for extra excursion for 2x12, 3x12 or larger. 

In nearfield, I put my Magnepan LRS+ on top of a 1x12 modular H-Frame that I bought flat packs from captainhemo/Jay.    Works for LRS as well.  This way they are time aligned if the planars are vertical. 

I do use a dspNexus 2/8 and have done just sub DSP EQ and speaker correction for shows with great sound quality with Class D amps.  I use REW to do the room bass manangement measurements and then EQ the subs below 200Hz (around the Schroeder room frequency) with the recommended filters that it can generate.

It is not a HT sub with special effects.  Very musical indeed.

Leo once tried to explain your work to me mostly signal processing is my take. My speakers are about 6 feet from the front wall and the room is 13x22

[rollo]

 Wonderful Subs from GR. If someone can make the enclosures for you. I like Rythmic F12 subs. Own a pair. Very easy to set up.

charles

[ejk]

Wonderful Subs from GR. If someone can make the enclosures for you. I like Rythmic F12 subs. Own a pair. Very easy to set up.

charles

GR has flat packs

[P.I.]

The GR Research subs are fast (tight), articulate and tuneful.  Once you become used to not "hearing the boxes" there is no going back.  Flat in-room to below 20Hz.

[HAL]

The open baffle 12in H-Frame servo subs work well in rooms if you have at least 3ft from the rear of the cabinet to the front wall.  They need space for the dipole radiation pattern to work.  I typically have them 4ft from the side walls as well.  I aim them at the listening seat for the peak of the figure 8 to be pointing at me.

Depending on room size, is what drives the need for extra excursion for 2x12, 3x12 or larger. 

In nearfield, I put my Magnepan LRS+ on top of a 1x12 modular H-Frame that I bought flat packs from captainhemo/Jay.    Works for LRS as well.  This way they are time aligned if the planars are vertical. 

I do use a dspNexus 2/8 and have done just sub DSP EQ and speaker correction for shows with great sound quality with Class D amps.  I use REW to do the room bass manangement measurements and then EQ the subs below 200Hz (around the Schroeder room frequency) with the recommended filters that it can generate.

It is not a HT sub with special effects.  Very musical indeed.

Leo once tried to explain your work to me mostly signal processing is my take. My speakers are about 6 feet from the front wall and the room is 13x22

After Leo's sale, I help the dspNexus customer make the in room measurements, build the DSP processing needed and do the EQ corrections needed for the flat on-axis frequency response with Audio Weaver.   Room measurements make the frequency response correction process go a lot faster than only by ear.     

[ejk]

I think I may ditch the idea. If it doesn't work out I'm in a situation where selling it will not be easy due to weight and no boxes for shipping

[HAL]

That is why I build the modular 1x12 OB H-Frame cabinet version that captainhemo makes flat packs.   Easy to paint after gluing and clamping the cabinet with the dowels provided.

The tops and bottoms bolt on with supplied hardware and the sub stack can be dissasembled for easy movement and shipping.  Each loaded cabinet is about 35lbs.  I get dual wall shipping boxes from Lowes that are 18"x18"x16" and just put packing material around them. 

Good luck with your decision.

[ejk]

That is why I build the modular 1x12 OB H-Frame cabinet version that captainhemo makes flat packs.   Easy to paint after gluing and clamping the cabinet with the dowels provided.

The tops and bottoms bolt on with supplied hardware and the sub stack can be dissasembled for easy movement and shipping.  Each loaded cabinet is about 35lbs.  I get dual wall shipping boxes from Lowes that are 18"x18"x16" and just put packing material around them. 

Good luck with your decision.

I'm not out yet. lol
I was looking at Danville's website and the DSP price is just out of my ballpark.
I was just looking at this picture and saying to myself why can't I do this? But I think Danny was saying somewhere that the 2 opposed woofers were better for Open Baffle speakers. If I got the single flat pack, I could still stack them and use the amp Danny supplies. I don't see the single flat pack on Danny's website so I would assume I would email Capthemo direct for pricing.

[HAL]

ejk,
Yes, ask captainhemo directly for pricing with shipping to you.

I find very little difference between all forward firing and opposed firing OB servo subs.  With the modulars, they are symmetrical, so trying both ways is easy before making a decision.  Discuss it with him so he knows what you want to do.

[ejk]

I'm assuming this would satisfy my room which is 13x22 and treated with diffuser and absorption panels and bass traps, including ceiling.

[HAL]

I would ask Danny that question. 

The way I setup the subs is 3ft from the front wall and 4 ft from the side walls.  If on the short wall that puts the subs 5ft apart.  The speakers would be on the outside of the subs.

I just did something similar for a customer with Magnepan 3.7's with the dual OB subs with very good results.  His room was wider than 13ft and mine is 16ft wide. 

[ejk]

I would ask Danny that question. 

The way I setup the subs is 3ft from the front wall and 4 ft from the side walls.  If on the short wall that puts the subs 5ft apart.  The speakers would be on the outside of the subs.

I just did something similar for a customer with Magnepan 3.7's with the dual OB subs with very good results.  His room was wider than 13ft and mine is 16ft wide. 

I sent Captainhemo an email. I'm thinking either way now on the cabinet as I am thinking of just placing it in the middle of my speakers. Here is a link from A/C on my system.

https://www.audiocircle.com/index.php?action=systems;area=browse;system=2712

[ejk]

I heard back from Danny and he said one Dounle Trouble would work great in my system. Now someone push me over the edge.