Specifically, you want to look for a frequency response range of 20 Hz to 20 kHz. That is considered standard spec for both recording and playback of CDs. Since you're really interested more in the upper range, you need 20 kHz more than you need 20 Hz, so the upper range is where your focus should be.
Standard speakers with this spec are not hard to find. They are, after all, standard. So when you ask, state that you are looking for a frequency response range of 20 Hertz to 20 kiloHertz, and higher on the top end if they have it - I have seen speakers and headphones that range from 21 kHz maximum to 27 kHz maximum. Higher than 20 kHz will not make a great deal of difference, except that it will reproduce ultrasonic audio much more... silently... shall we say.
Radio Shack usually has something good in this direction. Remember that Wal Mart is the King of Cheap, and to get that cheap, they cut corners all over the place on quality. They get away with it because nobody cares because to most people (non-audiophiles) they can neither tell the difference nor does it matter to them if the speaker plays at standard CD record/playback spec... well, for this, it matters. Ultrasonic subliminals are designed to use the higher end of the standard specification, and mine in particular use the higher end of the higher end.
Frequency response is usually on the box when you are purchasing. It will say something like this:
FR or Frequency Response: 20 Hz - 20 kHz
If you can't find frequency response specified on the box... don't buy it.
The worst I have seen, and the best I have seen, ironically, were both in the same Radio Shack store. The worst was a mono headphone set that had a FR of 150 Hz to 10 kHz. Not three feet away was a stereo headset that had 18 Hz to 27 kHz.
Oh, and by the way, you want stereo - not mono. My subliminals make good use of the stereo audio feature. Momo speakers and headphones will kill the techniques I use to increase effectiveness with that.
This thread has some good info. Making this one sticky.
Standard speakers with this spec are not hard to find. They are, after all, standard. So when you ask, state that you are looking for a frequency response range of 20 Hertz to 20 kiloHertz, and higher on the top end if they have it - I have seen speakers and headphones that range from 21 kHz maximum to 27 kHz maximum. Higher than 20 kHz will not make a great deal of difference, except that it will reproduce ultrasonic audio much more... silently... shall we say.
Radio Shack usually has something good in this direction. Remember that Wal Mart is the King of Cheap, and to get that cheap, they cut corners all over the place on quality. They get away with it because nobody cares because to most people (non-audiophiles) they can neither tell the difference nor does it matter to them if the speaker plays at standard CD record/playback spec... well, for this, it matters. Ultrasonic subliminals are designed to use the higher end of the standard specification, and mine in particular use the higher end of the higher end.
Frequency response is usually on the box when you are purchasing. It will say something like this:
FR or Frequency Response: 20 Hz - 20 kHz
If you can't find frequency response specified on the box... don't buy it.
The worst I have seen, and the best I have seen, ironically, were both in the same Radio Shack store. The worst was a mono headphone set that had a FR of 150 Hz to 10 kHz. Not three feet away was a stereo headset that had 18 Hz to 27 kHz.
Oh, and by the way, you want stereo - not mono. My subliminals make good use of the stereo audio feature. Momo speakers and headphones will kill the techniques I use to increase effectiveness with that.
This thread has some good info. Making this one sticky.
Subliminal Audio Specialist & Administrator
The scientist has a question to find an answer for. The pseudo-scientist has an answer to find a question for. ~ "Failure is the path of least persistence." - Chinese Fortune Cookie ~ Logic left. Emotion right. But thinking, straight ahead. ~ Sperate supra omnia in valorem. (The value of trust is above all else.) ~ Meowsomeness!
The scientist has a question to find an answer for. The pseudo-scientist has an answer to find a question for. ~ "Failure is the path of least persistence." - Chinese Fortune Cookie ~ Logic left. Emotion right. But thinking, straight ahead. ~ Sperate supra omnia in valorem. (The value of trust is above all else.) ~ Meowsomeness!
