Looking to run a true 5HZ signal to my Sub woofers but think my anthem receiver will Bottle neck this.

[Allen Vos]

So as many of you know from a previous thread I am builiding 4 Mach 5 auido ftw-21" sub woofers in 4 seperate sealed boxed. Using Winisd and the cone excursion function I am able to get these subs down to 5HZ with 1200 watts of imput in a 6.2 cubic foot sealed box, with only 23mm of cone excursion, which is well under the 29mm spec of the sub travel

So I will list my entire setup here with regards to imput source, reciever, mini dsp and amplifier.

Anthem MRX1140 Reciever, which outputs an unbalanced sub out signal to the Mini DSP
Zidoo Zx9 media player, is connected to the Anthem Via HDMI
Mini DSP Flex HTx hooked to the CVR amp via TRS to XLR cords for a true balanced signal
CVR D-1004 Amplifier powering all 4 sub woofers

The issue I am going to run into is that the Anthem reciever has a frequency cut off at 20HZ, so If I wanted a true 5HZ signal into the subs, I would have to have the mini DSP Flex HTx reproduce that signal. Since that signal does not come from the Anthem reciever, the mini DSP cannot restore or cleanly boost a signal that has already been filtered out by the AVR without introducing severe noise and clipping.

Another option would be to connect a USB cord from the Zidoo box direct to the mini DSP so it would get a true 5HZ signal to the CVR amp and avoid the 20HZ cut off in the anthem reciever.

I do understand a lot of this to a certain extent, however this is very much uncharted territory for me as I have really only played with store bought stuff most of my life and a small amount of car auidio.

I have not purchased the Mini DSP Flex HTx or the CVR D-1004 amplifier yet, so if there are better options for what I would like to do, I would appreciate some imput and Im more than willing to listen to advice.

 

[TLS Guy]

So as many of you know from a previous thread I am builiding 4 Mach 5 auido ftw-21" sub woofers in 4 seperate sealed boxed. Using Winisd and the cone excursion function I am able to get these subs down to 5HZ with 1200 watts of imput in a 6.2 cubic foot sealed box, with only 23mm of cone excursion, which is well under the 29mm spec of the sub travel

So I will list my entire setup here with regards to imput source, reciever, mini dsp and amplifier.

Anthem MRX1140 Reciever, which outputs an unbalanced sub out signal to the Mini DSP
Zidoo Zx9 media player, is connected to the Anthem Via HDMI
Mini DSP Flex HTx hooked to the CVR amp via TRS to XLR cords for a true balanced signal
CVR D-1004 Amplifier powering all 4 sub woofers

The issue I am going to run into is that the Anthem reciever has a frequency cut off at 20HZ, so If I wanted a true 5HZ signal into the subs, I would have to have the mini DSP Flex HTx reproduce that signal. Since that signal does not come from the Anthem reciever, the mini DSP cannot restore or cleanly boost a signal that has already been filtered out by the AVR without introducing severe noise and clipping.

Another option would be to connect a USB cord from the Zidoo box direct to the mini DSP so it would get a true 5HZ signal to the CVR amp and avoid the 20HZ cut off in the anthem reciever.

I do understand a lot of this to a certain extent, however this is very much uncharted territory for me as I have really only played with store bought stuff most of my life and a small amount of car auidio.

I have not purchased the Mini DSP Flex HTx or the CVR D-1004 amplifier yet, so if there are better options for what I would like to do, I would appreciate some imput and Im more than willing to listen to advice.

Why on earth would you want to do that? No cone speaker will ever reproduce that. The cone my vibrate, and you may destroy a perfectly good driver, but you will NOT generate a 5 Hz sound wave. For a start the cone will move but nothing will be generated. The Fs of a moving coil driver is essentially the lowest frequency it will generate, although it may make sound, but the cone will be breaking up and you will get frequency doubling. So if driver Fs is 23, and you feed it 15 Hz, you will likely hear 30 Hz, which is still very low and you may think you have generated 15 Hz, but you won't have.