one more question.. the lower HZ is limited by the amp?whats the diference in 20Hz and 150hz for example.. and if i have a transducer cabable of 10hz to 150hz could my amp not be able to give the necessary HZ to the transducer? hope you understand.. just for curiosity..
Its required by both the amp and the unit.
Amps that are best for tactile generally are amps used for powering large bass drivers or subwoofers. As these, unlike typical stereo amps, are focused on low Hz capabilities.
With tactile you wont feel much above 90Hz-100Hz it depends on your installation, the materials but really frequencies at this level are more like a phones vibration in energy/strength. Strong bass starts to drop off around 50Hz.
The iNuke DSP range is manufactured for this, it is also proven as a very capable performing range for subwoofers in home cinema as well as music professionals using large subs.
The audio hearing range is measured from 20Hz - 20Khz
Some amps will only even start to deliver good energy closer to 30Hz or 40Hz as noted earlier. Yes they may be rated as supporting from 20Hz but that does not mean they will sufficiently deliver strong energy at such or with no stress. Speakers and music or general audio, unlike tactile effects, do not constantly use low frequencies or those below 20Hz. Please keep that in mind as tactile can stress an amplifier a lot more than typical audio.
A reason for amps not needing to deliver a lot of energy under 40Hz is that many cheap amps will likely be used with speakers that may not even go below 40Hz range. For example a speaker rated from 75Hz - 20,000 Hz, it does not need an amp with good energy below 30Hz or 20Hz. Yet a speaker is not a tactile unit. Tactile have a specific purpose working within a very limited freqwuency range. Sure, some units may also be rated with specs of operating from as low as 5Hz or 10Hz but I can 100% assure you that most common models under the $100 / £100 struggle to maintain composure or bring strong energy below 35Hz. They are at their best in the 35-50Hz range with decent bass upto to 60Hz and then finer detailing above this.
If you only seek entry level or common tactile then cheaper amps may suffice, however if you want an amp that can handle more professional or capable units in the future then thats a decision to consider getting the iNuke DSP model.
I show this image of a frequency chart as a guide.
Look at the size of the squares/grid for the frequencies, at the moment ignore the coloured lines.
This helps determine the energy bandwidth they hold and therefore require MUCH greater levels of energy to be reproduced sufficiently. Compare the size of the strongest region for most common units in the 40-50Hz range to the size of 10-20Hz. Do you see how much more this is.
Compare also the distance of 10Hz to 30Hz to say 40Hz - 100Hz. One is only 20Hz variation the other is 3x that with 60Hz. Yet look again at the size/bandwidth differences.
Having an amplifier that can deliver such benefits in power/energy with these lowest frequencies do not generally come cheap. That is why such amps or higher end tactile that can properly deliver these frequencies are desired but generally also cost more.
As a perspective of my own experiences and collecting feedback from other people having done frequency tests with various models over several years. Here are points to compare for popular units and their lowest Hz capabilities/performances
Lines:
Green = ADX / Reckhorn
Blue = BK Mini lfe
Yellow = BK Advance
Red = BK LFE
So i hope you see how far off the general units are from the strongest BK LFE or even the very capable BK Advance models. It's really upto you as the user to determine what performance level you want to attain and buy 1 better unit to start with that will still vibrate the whole rig or go with a lower spec unit and install 4 of them with two budget amps.
