Recent content by Brian_DR

Ryan, All current (and future) versions of Rythmik amps have bleeders in them (a small portion of older amps did not, serial number before C000100). This makes the service much safer. I for one, will not have an amp without bleeders. I still think I made the right decision to ask my supplir...

Sometime it is not necessary to move all four poles in vented box or PR. First, a vented box/PR need 6th order roll-off to limit the excursion below box resonance freq. So it's not like in sealed box where you want to extended far below the box resonance freq. Second, for small box, those 4...

Brian, Technically, it is possible to bottom out with a 380WRMS amp, though incorrect driver parameters can acerbate the problem. Here is the reason. The power rail is 80V DC for my amp (no load). That does not mean it will output 800W RMS @4ohm. Because under 4ohm loading, the power rail...

Jeff, what extension filter setting did you have? Thanks. Brian D. Rythmik Audio

Jeff, First, very sorry to hear your story. Second I would like to understand the cause of it. It sounds like the driver has been bottomed out very often. Is the sub a vented box? The reason I ask is because vented box has 3 times excursion requirement below resonance frequency. Without a...

Brian, Thanks for bringing up the idea. It also goes well with my earlier plan - to bring out my own subwoofer drivers. For those who are looking for LT circuit but does not want to pay for a full unit, this is the most economical solution.I have my own recipe for good subwoofer drivers, ie...

Garret, The clipping problem depends on how hard you push the sub and how you adjust the extension filter properly. For vented or PR configuration, one may also be concerned with the excessive excursion below resonance frequency. The computer simulation will show the largest excursion occurs...

Garret, The adjustable extension filter on our amps can alleviate room gain problems which commonly cause bass to sound slow or boomy. Room gain is related to where you put the sub and very much room dependent. BTW, for those who would like to try sealed box configuration, we will have...

First of all, the upgrade requires a lot of work from me (all the upgrade is done here in US). The $15 increase also covers longer warranty (3yr vs 1yr). The reason I offer the upgrade go with my personal objectives. I always want to add features that will give customers more rewarding...

Jon, For those who had purchased the amps (serial number C000108 and earlier), the warranty will be extended to 3 yrs. I will not sell any more amps with 80V filter caps. All the new ones will come with 100V filter caps and match the best warranty in the market for similar 350W amplifiers...

John, This is Brian from Rythmik Audio. I don't think it is ethical to attack other's products in public forums without giving all the facts. Especially when none of my customers had this problem so far. Why didn't you publicize this problem when you already knew there was a problem with...

If you do get an Samson, consider buying an external xover as well. Without the external xover, the mid bass (80-150hz) can stand out very much, making the music sounds very forward and/or boomy. It is a misconception that the xover from HT receivers is sufficient. Because those are for ideal...

Jack, 1) The quarter wave length of 100hz signal is 2-1/2'. That is not long. You don't need long tubes to have significant low frequency resonance. 2) I am not sure if you have tried lay it down. But it sounds like it will hop around. Try 3.1) The flexing comparison is valid only when...

Sonotube (or cylinder-type) subs are easier to build. But lets not forget drums are made of cylinders. Church organs also use cylinders as well as many other instruments. That means it is easier for cylinders to develop few but reinforced resonance modes. There are also limited choices of...