Open Baffle Sub

HAL · March 17, 2025, 05:00:03 PM

Well, put a pair of the modular 2x12 OB subs in Jay's cabs for a customer in Feb. Covers 14Hz to 125Hz with his Magnepan 3.7 speakers. These have the dspNexus EQ processing not a Servo Amp run with his Rotel amps.

Sounds much better than his earlier ported subs.

Nick B · March 17, 2025, 06:01:15 PM

Quote from: HAL on March 17, 2025, 05:00:03 PM
Well, put a pair of the modular 2x12 OB subs in Jay's cabs for a customer in Feb. Covers 14Hz to 125Hz with his Magnepan 3.7 speakers. These have the dspNexus EQ processing not a Servo Amp run with his Rotel amps.

Sounds much better than his earlier ported subs.

Nice looking room, Rich, but seems a bit narrow. If so, I presume easily adjustable via dsp

Nick

HAL · March 17, 2025, 07:37:07 PM

Nick,
Yes, the system and room is being DSP EQ'd with very good results.

ejk · March 18, 2025, 05:23:42 AM

Quote from: HAL on March 17, 2025, 07:37:07 PM
Nick,
Yes, the system and room is being DSP EQ'd with very good results.

I was reading that some owners can't get below 30hz. What to do. Has anyome tried sealed subs with the open baffle speakers. That is not using dsp, sorry for the qoute

HAL · March 18, 2025, 05:42:07 AM

With the room setup I mentioned, here is the system frequency response in the room pictured at the listening seat. This is before any room bass management is applied.

This is not using the servo amp, but EQ from the dspNexus 2/8 with Rotel amps the subs 3ft from the front wall and 4ft from the side walls.

ejk · March 19, 2025, 06:58:14 AM

Quote from: HAL on March 18, 2025, 05:42:07 AM
With the room setup I mentioned, here is the system frequency response in the room pictured at the listening seat. This is before any room bass management is applied.

This is not using the servo amp, but EQ from the dspNexus 2/8 with Rotel amps the subs 3ft from the front wall and 4ft from the side walls.

I guess I have stuck in my brain something that will pressurize a room, but OB subs don't do that from my understanding they will just add impact. A double bass will go down to 31hz and from what I have read the only thing that will go lower would be a pipe organ. My goal would be to hear that double bass clearer even though I feel it is good now. I got a chance to go over to Greg from GT Audio yesterday and listen to his speakers. They are not GR Research subs but the same concept. He had dual quadruple subs with his Planar speakers and the bass was impactful, yet the double bass sounded just a tad bit better than what I get with my Spatial speakers. I emailed Danny and asked him if we can get a call going. Captainhemo advised me not to go with single enclosures due to needing separate amps and wiring.

rollo · March 19, 2025, 08:56:35 AM

Quote from: ejk on March 19, 2025, 06:58:14 AM
Quote from: HAL on March 18, 2025, 05:42:07 AM
With the room setup I mentioned, here is the system frequency response in the room pictured at the listening seat. This is before any room bass management is applied.

This is not using the servo amp, but EQ from the dspNexus 2/8 with Rotel amps the subs 3ft from the front wall and 4ft from the side walls.

I guess I have stuck in my brain something that will pressurize a room, but OB subs don't do that from my understanding they will just add impact. A double bass will go down to 31hz and from what I have read the only thing that will go lower would be a pipe organ. My goal would be to hear that double bass clearer even though I feel it is good now. I got a chance to go over to Greg from GT Audio yesterday and listen to his speakers. They are not GR Research subs but the same concept. He had dual quadruple subs with his Planar speakers and the bass was impactful, yet the double bass sounded just a tad bit better than what I get with my Spatial speakers. I emailed Danny and asked him if we can get a call going. Captainhemo advised me not to go with single enclosures due to needing separate amps and wiring.

The piano goes down to 28HZ. However not the point. Subs especially pairs bring the full sound stage/ The Hall pe say. I like Rythmic F-12 Subs which I use. Go down to 16HZ. Subs make a big difference even if your speakers go down to 20HZ. Lee Scoggins uses subs with His Wilsons as an example. About 1K each.

charles

ejk · March 19, 2025, 09:07:22 AM

Quote from: rollo on March 19, 2025, 08:56:35 AM
Quote from: ejk on March 19, 2025, 06:58:14 AM
Quote from: HAL on March 18, 2025, 05:42:07 AM
With the room setup I mentioned, here is the system frequency response in the room pictured at the listening seat. This is before any room bass management is applied.

This is not using the servo amp, but EQ from the dspNexus 2/8 with Rotel amps the subs 3ft from the front wall and 4ft from the side walls.

I guess I have stuck in my brain something that will pressurize a room, but OB subs don't do that from my understanding they will just add impact. A double bass will go down to 31hz and from what I have read the only thing that will go lower would be a pipe organ. My goal would be to hear that double bass clearer even though I feel it is good now. I got a chance to go over to Greg from GT Audio yesterday and listen to his speakers. They are not GR Research subs but the same concept. He had dual quadruple subs with his Planar speakers and the bass was impactful, yet the double bass sounded just a tad bit better than what I get with my Spatial speakers. I emailed Danny and asked him if we can get a call going. Captainhemo advised me not to go with single enclosures due to needing separate amps and wiring.

The piano goes down to 28HZ. However not the point. Subs especially pairs bring the full sound stage/ The Hall pe say. I like Rythmic F-12 Subs which I use. Go down to 16HZ. Subs make a big difference even if your speakers go down to 20HZ. Lee Scoggins uses subs with His Wilsons as an example. About 1K each.

charles

Understood but my dilemma is that they claim boxed subs do not integrate well with OB speakers. Not sure but I get a 50/50 split opinion on boxed subs vs OB subs working correctly with my Spatials or OB speakers in general

HAL · March 19, 2025, 04:11:11 PM

If you heard Greg's subs, then that is the bass quality you would get with the GR/Rythmik style OB subs.

I always match speaker radiation patterns, OB speakers and OB subs or Magnepans dipoles with dipole OB subs are great combinations.

Jack · March 19, 2025, 07:45:03 PM

Evan

I used a pair of Rythmik F12G's with Spatial M3 TMs in an 18x24x10 Family Room for over three years and I had no problem integrating them. I'm now using the F12Gs and a pair of F12SEs together in a larger purpose built room with the quasi open baffle Qualio IQ Ultra's and again no problem with the integration. I've found that integration problems occur with too high of a crossover setting and volume setting. The subs also worked fine with the again quasi open baffle Nola KO's. The M3 TMs are boxed up in a climate controlled warehouse since the move so haven't tried them in the new room.

ejk · March 20, 2025, 12:23:28 AM

Quote from: Jack on March 19, 2025, 07:45:03 PM
Evan

I used a pair of Rythmik F12G's with Spatial M3 TMs in an 18x24x10 Family Room for over three years and I had no problem integrating them. I'm now using the F12Gs and a pair of F12SEs together in a larger purpose built room with the quasi open baffle Qualio IQ Ultra's and again no problem with the integration. I've found that integration problems occur with too high of a crossover setting and volume setting. The subs also worked fine with the again quasi open baffle Nola KO's. The M3 TMs are boxed up in a climate controlled warehouse since the move so haven't tried them in the new room.

I have been looking at the F12 and after hearing the OB subs I'm in a dilemma, do I want fast boomless bass or do I want to pressurize the room.

S Clark · March 20, 2025, 09:31:44 AM

It's up to you to decide what you want. But years ago when I was at Danny's and we were tweaking his first speaker that integrated the servo subs, I told him it was the first time I heard a speaker that could sound like the lower register of a 9 ft concert grand piano.
But I know a guy that is addicted to boom... he doesn't think my system has "enough" bass. I think his system simply booms the room at about 90 hz. Different stokes for different folks.

rollo · March 20, 2025, 11:07:10 AM

Then there is "The Swarm" set up. Four subs. Absolute Sound Award.
charles

ejk · March 21, 2025, 06:06:42 AM

Not to be redundant, but I just want to clarify that I want to still run the Spatial speaker's full range, and I want which ever sub I choose to accompany the Spatial and go lower in the bass. It seems to be a 50/50 mix on which to choose from who I have been talking to.

rollo · March 21, 2025, 09:00:15 AM

Quote from: ejk on March 21, 2025, 06:06:42 AM
Not to be redundant, but I just want to clarify that I want to still run the Spatial speaker's full range, and I want which ever sub I choose to accompany the Spatial and go lower in the bass. It seems to be a 50/50 mix on which to choose from who I have been talking to.

and that is what you should do. Exactly what I do. The -3db point of my speakers are 38db. The crossover is set at 40HZ. Blends in perfectly. They are placed away from the corner as Rythmic suggests. Actually in line with drivers of speakers.

charles