Class D module/amp to reach 5Hz?

[Antripodean]

I am wanting to know if there is a class D amp or module available that will run from 5Hz and up? I'm not a designer but I can put together a module with SMPS etc to get something running. In terms of power, I would like 250-300watts into 8 ohms. Basically I want to be able to drive a low frequency subwoofer (or two )

I couldn't find any threads on this but if you can point me in the right direction that would be appreciated

ps. doing this on a budget so not interested in labgrupen pricing

[Workhorse]

Originally Posted by Antripodean

I am wanting to know if there is a class D amp or module available that will run from 5Hz and up? I'm not a designer but I can put together a module with SMPS etc to get something running. In terms of power, I would like 250-300watts into 8 ohms. Basically I want to be able to drive a low frequency subwoofer (or two )

I couldn't find any threads on this but if you can point me in the right direction that would be appreciated

ps. doing this on a budget so not interested in labgrupen pricing

Which woofer has its frequency response down to 5Hz??

[Saturnus]

Originally Posted by Workhorse

Which woofer has its frequency response down to 5Hz??

Any speaker in an infinite baffle could in principle do it with enough compensation. The real question is what speaker has the needed 127 dB/W/m sensitivity for you to even be able to feel it as it takes roughly 140 dB for that (it'll never be audible at any volume).

[ssanmor]

Hello, we can help you with that, we have several applications running down to 0.5Hz (not for audio, obviously) based on our amplifiers. Drop us an email to info@coldamp.com and we'll surely find a solution.

[Antripodean]

Thanks for the replies. Yes, IB is the easiest way to get there. Looking for 115dB, feeling the bass and certainly not hearing it at those frequencies

[Saturnus]

Originally Posted by Antripodean

Thanks for the replies. Yes, IB is the easiest way to get there. Looking for 115dB, feeling the bass and certainly not hearing it at those frequencies

115 dB wouldn't be enough to even feel it. And with that and only 300W available that'd take a speaker that has 102 dB/W/m sensitivity at 5 Hz...

[Antripodean]

Saturnus, the figures you have are way above what my investigation has shown. For example, this study. Don't have a problem being proven wrong but these are the numbers, ~110dB, I have seen more than once. I found this article which partially differentiates between detection and feeling. However, I do not want to reach high SPLs for long periods of time.

[ViennaTom]

Subsonic frequencies can be felt with modest amplifier power, if you mount a so-called "shaker" to your sofa - although I do not know if this works well at < 10 Hz too .... maybe a very heavy shaker would do...
That gives me a new idea: As it usually takes giant membranes to produce substantial sound waves <10 Hz, has anybody tried mounting one or more shakers to a room wall ? (not a brick wall but a light room dividing one that can move if pushed). This way one could get an effective membrane area of many m^2...

[Antripodean]

Thanks Tom. I'm not interested in shakers. However, let me know if you can set up and test your giant membrane idea