Selling two Rythmik F12SE in a gorgous high gloss piano black. If there is a faster, punchier 12 sub out there Im not aware of it. These were used in both a two-channel and HT setup. Only selling as Im building a dedicated new Home Theater and upgrading to 5 Rythmik 18, which yeah, is kinda overkill but... There are a couple minor surface scuffs that I couldnt photograph properly due to their slight nature and the incredible mirror like finish. Includes, subs, power cords, tech sheet/manual and original packaging.

Selling my like new 15 INCH  Rythmik subs. Subs are in perfect working condition. With no scratches or issues. If you are looking at these subs then you know how great and musical they are. Please see my Ebay rating and bid with confidence. Price is for both subs. Each sub sells for 1500 dollars brand new so this is a great deal to pick up a pair of top tier subwoofers. Local pick up only Ps. Got a couple requests for more pics.No scratches or dents . These subs are in great condition

This Rythmik DS1510 subwoofer is the perfect addition to your audio setup. With 300 watts of RMS power, it produces deep, rich bass that is sure to enhance your listening experience. The black color and wired connectivity make it easy to integrate into any home audio system. As an audiophile-grade subwoofer, the Rythmik DS1510 is designed to deliver high-quality sound that is both powerful and precise. Its brand, model, and type make it a sought-after choice for serious music lovers. Whether youre watching a movie or listening to music, this subwoofer will provide a truly immersive audio experience.

Enhance your audio experience with the Rythmik LV12R subwoofer. This audiophile-grade subwoofer delivers a powerful 300W RMS power output to give you deep, rich bass that brings your music and movies to life. With its sleek black design, the LV12R will seamlessly integrate into any home audio system. Its brand reputation, coupled with its model, makes it a sought-after subwoofer for audiophiles. Upgrade your home audio system with the Rythmik LV12R and feel the difference in sound quality. Description below from the Rythmik website:Home theatre on a budgetLooking for an affordable home theatre sub that is also tight and musical? LV12R uses a rear vented alignment to gain low frequency impact and output that home theatre demands. While many of our competitors limit their best technology to their top level models, we wanted to make Direct Servo affordable, so weve held nothing back. As a result, you get the tight and music bass you wouldnt normally expect from a vented subwoofer.Direct Servo TechnologyYou may have heard about other servo subwoofers which are generally well regarded for their accuracy. It is a well established technology, most often based around an accelerometer which measures cone movement. Our Direct Servo technology has significant advantages over other servo technologies. We use a sensing servo coil which acts like a microphone which compares the original signal to what the subwoofer is actually reproducing. The signal is then corrected instantly to compensate for any differences. Once you understand the concept, you may wonder like we do why anyone would make a subwoofer any other way.Some of the benefits of Direct Servo include:Reduction of the effects of thermal compression are eliminated under normal operationHigher efficiency allowing output which would normally require a more powerful amplifierDeep bass extension can be achieved using a low mass driver with superior transient responseMechanical and thermal memory effects are reduced, further improving transient responseMuch greater damping control over the coneDramatic reduction of the re-radiation of bass from inside the box

Selling my like new 15 INCH  Rythmik subs. Subs are in perfect working condition. With no scratches or issues. If you are looking at these subs then you know how great and musical they are. Please see my Ebay rating and bid with confidence. Price is for both subs. Each sub sells for 1500 dollars brand new so this is a great deal to pick up a pair of top tier subwoofers. Local pick up only Ps. Got a couple requests for more pics.No scratches or dents . These subs are in great condition

Selling my like new 15 INCH  Rythmik subs. Subs are in perfect working condition. With no scratches or issues. If you are looking at these subs then you know how great and musical they are. Please see my Ebay rating and bid with confidence. Price is for both subs. Each sub sells for 1500 dollars brand new so this is a great deal to pick up a pair of top tier subwoofers. Local pick up only Ps. Got a couple requests for more pics.No scratches or dents . These subs are in great condition

Rythmik Subwoofer Box 15 inch Piano Black High E15/E15HP2 F15H H600XLR3.Used and there are cosmetic damages (scratches and crack chips) you can find in pictures.Originally purchased and paid over $1700.

Rythmik Subwoofer Box 15 inch Piano Black High E15/E15HP2 F15H H600XLR3.Used and there are cosmetic damages (scratches and crack chips) you can find in pictures.Originally purchased and paid over $1700.

Rythmik Subwoofer Box 15 inch Piano Black High E15/E15HP2 F15H H600XLR3.Used and there are cosmetic damages (scratches and crack chips) you can find in pictures.Originally purchased and paid over $1700.

Rythmik Subwoofer Box 15 inch Piano Black High E15/E15HP2 F15H H600XLR3.Used and there are cosmetic damages (scratches and crack chips) you can find in pictures.Originally purchased and paid over $1700.

Rythmik L12 Direct Servo Subwoofer in Black Matte finish. I am the original owner of this subwoofer and it is in great functional condition. The subwoofer comes with the original box, quick start guide, and power cable. The sub had very light use in a townhome living room for a year and a half, then was boxed up for the last few years after I had kids and switched to a sound bar. The sub has a small ding on the back top edge (pictured), and a medium and small hole on the bottom edge of the front grill. Please let me know if you have any questions.On Oct-30-23 at 07:37:38 PDT, seller added the following information: To avoid any confusion, I added a picture of the sub turned on. Despite it being packed up for a while, it has been tested as working.

If you are an audiophile music lover then this subwoofer is for you! The magic words are seamless integration, as in you cant tell where your speakers end and the subwoofer begins. I spent a lot of time researching and experimenting with different settings and combinations in order to attain a perfect setup with my bookshelf speakers, which I sold, and then my current tower speakers when I upgraded the bookshelfs. First. I will start by saying I hate subwoofers. I hate having to configure them and I hate that they take up floors pace in my room. Having said that, I love music and there are almost no speakers under $7,500 whose sound cannot be improved with a good quality subwoofer - or two. So subs I use. Theres two ways you can integrate subwoofers with your system, bass augmentation and proper bass management. With bass augmentation your main speakers get the full range of sound and the subwoofers only kick in where the main speakers need help, according to your preference as that is the only thing that matters. I gave up on this for one simple reason: the subwoofer is probably better at reproducing the lower sound frequencies than the main speakers. Many people wont care but an audiophile will because the goal is the best sound possible. If your main speakers are pretty good at reproducing the lower frequencies then this setup may be Ok for you, it was not for me. This F12 has crossover settings which will help integrating with those speakers fairly well. Which brings us to proper bass management. Here we use some way to split the sound frequencies such that they get sent to main speakers above a certain frequency and to the subwoofer below that frequency. Here we start with a Linkwitz-Riley filter setup. With this filter setup the frequencies to the main speakers roll off below the crossover frequency and to the subwoofer above the crossover frequency at 24 db/octave. Theoretically with this setup, the frequency response of the combined speakers will be flat below and above the crossover frequency, which in theory would be ideal but room acoustics change all that. Most home theater and many stereo receivers have built-in subwoofer settings using Linkwitz-Riley filters. What many people fail to realize is that this setup only is perfectly flat if the main speakers are relatively flat (say -3 db) at half the crossover frequency and the subwoofer -3 db at twice the crossover frequency. For example at the typical 80 Hz crossover frequency the main speakers should be relatively flat to 40 Hz and the subwoofers relatively flat at 160 Hz. If this is not the case then we may need to experiment with different settings like damping. Or we may just think the sound sounds good enough. The F12 has a LFE setting that allows it to reproduce sound relatively flat well above the 80 Hz crossover frequency. In the name of seamless integration! If one uses a home theater or stereo receiver with subwoofer integration then we must know that if we play digital audio then the sound starts digital, gets converted to analog by whatever built-in DAC, then get reconverted to digital so that the signal can be split highs to the main and lows to the subwoofer, then back to analog when sent to the amplifier portion. Many people dont know or dont care but many, such as I will care. To my ears the sound quality was degraded thus I started using analog crossovers that kept the splitting of the frequencies in the analog domain. Good analog crossovers are not cheap, some costing from $1000 to $3000 or more, although there is one that is potentially good at about $500. With the F12 we can tune in how tight the bass should be. This is important for seamless integration since not all main speakers will reproduce the lower frequencies with the same degree of tightness. I set up my F12s to maximum tightness and I felt the sound from it was tighter than my 6 bookshelf speakers. Unbelievable! Really awesome how tight the bass is with these subs. I say subs because I was not happy with just one sub. Sure we could tune it for acceptable sound and that will be fine until we start moving to different parts of the listening room. I highly recommend two subs. With two subs we get a more consistent sound image in different parts of the listening room, it is about this and not just to get more bass. Sound with well integrated subs is fantastic. The amplifier to the main speakers will have more power to the mains speakers and should produce better sound quality, the degree that that will be the case will vary with the amplifier. I go to many national and local music events. The sound with two Rythmik F12 is as close to a live performance that I have heard in my living room. Absolutely breathtaking sound! I have to say at least once I wish that the F12 had a remote control, or a phone app like my friends subwoofer from a different company. The sound from the F12 is so good that I am willing to overlook that, though. Its not like the sub needs configuring often anyway. One time that it may need tweaking is if we have it set to maximum music enjoyment and then we decide to configure it for playing movies. I did not try the F12 in a home theater system to play movies but I think there may be better options (Rythmik also sells subs with ports that may be better for playing movies, which I dont. If the F12 are that good then why am I selling it? Well, I need money for a business Im starting and I think Im going to upgrade to Rythmik subs with 15 drivers anyway at some point in the nearish future. And I have another one I can use and deal with the change in imaging when I move around. The servo technology also helps keep the sound from straying out of phase at different frequencies. Why did I write so much about this integration? Because this sub could probably make any system sound great but with careful consideration it can take it to another level of reproducing music near live music quality! Apologies for the less-than-perfect picture quality. The paint scratched off near the top front edge but it is hard to see. It could easily be touched up to make it less visible with paint or a marker even. A370XLR3 Class A/B servo amplifier Patented Direct Servo technology 12 black/silver anodized aluminum high excursion driver Solid and very inert enclosure Bass extension controls allowing adjustment of bass extension and excursion control Selectable 12/24 db/octave crossover filter slope Balanced XLR connections Parametric EQ I am the original owner of this subwoofer and it comes in the original box. I took delivery of it on 9/2021. I have another one that I bought used on eBay but I dont have a box for it so Im not selling it.