Partner moved in and her grand piano in the living room (stereo room!) displaced the grand subwoofer and so ... it has to go. :-(
For those unfamiliar with Rythmik, they exclusively make non-accelerometer-based (read: reliable) servo subwoofers using excellent components: spun aluminum cones, shorting rings, cast frames in the drivers, toroidal transformers in the linear amplifiers, or Hypex based for the class D. Really nice stuff.
The unit I have is an older one, comparable to the current DS1502 kit on this page, but with a 370 watt RMS amplifier:
Rythmik Audio 15" servo subwoofer " DS1500 Custom Installation subwoofer
Here's the page for Rythmik describing their servo technology, and why they developed it in the first place.
Rythmik Audio • Servo subwoofer products
And the FAQ page:
Rythmik Audio • FAQ - Frequently asked questions
The box I'm using was built by a fellow hi-fi enthusiast, and far exceeds most anything commercially - it's a sealed box built around a bandpass box, resulting in a thickness of 1.5" (2 x 3/4" MDF), and solid as concrete. That's also why this is strictly pickup only - I can barely push the box on my own, let alone pick it up and load it into a car/truck. It's black, large, and very impressive. The box is 3.6 cubic feet, so ~exactly~ ideal for this driver/amplifier combination.
Looking for $517, locally picked up in Los Angeles (right by Pasadena).
Here are the details for the subwoofer driver itself:
Rigid anodized aluminum cone (black or silver)
* Rigid 12 spoke cast aluminum basket
* FEA designed aluminum short circuit ring to reduce 2nd order distortion
* High linear excursion capability of 1.4" peak to peak (xmax)
* High mechanical excursion capability of 2.6" peak to peak (xmech) to reduce risk of bottoming
* Very low inductance
* 24 ohm ultra thin sensing coil for servo operation keeps moving mass low
* Woven wire lead in the spider to prevent rattling during high excursion
* Gold spring loaded terminals for easy solderless cable connection
* Single 2.8 ohm voice coil
* Available with rubber mounting gasket (15-5/8" outer diameter and 3/4" depth)
* Mounting without gasket (15-5/16" outer diameter and 7/16" depth)
* Two 1" stacked magnets for a total magnet height of 2"
* Cutout: 14"
* 7" clearance in depth
* 350W RMS max power
* Proudly made in USA
For those unfamiliar with Rythmik, they exclusively make non-accelerometer-based (read: reliable) servo subwoofers using excellent components: spun aluminum cones, shorting rings, cast frames in the drivers, toroidal transformers in the linear amplifiers, or Hypex based for the class D. Really nice stuff.
The unit I have is an older one, comparable to the current DS1502 kit on this page, but with a 370 watt RMS amplifier:
Rythmik Audio 15" servo subwoofer " DS1500 Custom Installation subwoofer
Here's the page for Rythmik describing their servo technology, and why they developed it in the first place.
Rythmik Audio • Servo subwoofer products
And the FAQ page:
Rythmik Audio • FAQ - Frequently asked questions
The box I'm using was built by a fellow hi-fi enthusiast, and far exceeds most anything commercially - it's a sealed box built around a bandpass box, resulting in a thickness of 1.5" (2 x 3/4" MDF), and solid as concrete. That's also why this is strictly pickup only - I can barely push the box on my own, let alone pick it up and load it into a car/truck. It's black, large, and very impressive. The box is 3.6 cubic feet, so ~exactly~ ideal for this driver/amplifier combination.
Looking for $517, locally picked up in Los Angeles (right by Pasadena).
Here are the details for the subwoofer driver itself:
Rigid anodized aluminum cone (black or silver)
* Rigid 12 spoke cast aluminum basket
* FEA designed aluminum short circuit ring to reduce 2nd order distortion
* High linear excursion capability of 1.4" peak to peak (xmax)
* High mechanical excursion capability of 2.6" peak to peak (xmech) to reduce risk of bottoming
* Very low inductance
* 24 ohm ultra thin sensing coil for servo operation keeps moving mass low
* Woven wire lead in the spider to prevent rattling during high excursion
* Gold spring loaded terminals for easy solderless cable connection
* Single 2.8 ohm voice coil
* Available with rubber mounting gasket (15-5/8" outer diameter and 3/4" depth)
* Mounting without gasket (15-5/16" outer diameter and 7/16" depth)
* Two 1" stacked magnets for a total magnet height of 2"
* Cutout: 14"
* 7" clearance in depth
* 350W RMS max power
* Proudly made in USA
No, haven't sold it yet, and beginning to reconsider selling it.
I landed on two really, really great subwoofers (Aurasound NS12-794) that I'm using in its stead. I'm fairly certain the Rythmik is still better (although two subwoofers handle room acoustics better). The big issue is that the two are smaller, and easier to place, but I might want to just make the big Rythmik work, as I'm fairly attached to it.
Cheers,
Tal
I landed on two really, really great subwoofers (Aurasound NS12-794) that I'm using in its stead. I'm fairly certain the Rythmik is still better (although two subwoofers handle room acoustics better). The big issue is that the two are smaller, and easier to place, but I might want to just make the big Rythmik work, as I'm fairly attached to it.
Cheers,
Tal