(11-18-2014, 12:46 AM)AlphaScorpio Wrote: Hi guys, I'm thinking about switching to ultrasonic subs for when I'm sleeping, I'm thinking about buying these (link below) has anyone got any experience using them for subliminals?

http://www.amazon.co.uk/XMI-X-Mini-Generation-Capsule-Speaker/dp/B001UEBN42/ref=sr_1_2?ie=UTF8&qid=1416300221&sr=8-2&keywords=x+mini+max+2+speakers

It says they are 20khz speakers but I know that sometimes companies are wrong about specs.

(11-19-2014, 07:03 AM)AlphaScorpio Wrote: I am not sure if it's mono it doesn't say anywhere, maybe someone knows? This is the reason I'm not buying them yet, I'd like stereo for sure as mono are 50% less effective.

(11-22-2014, 08:08 AM)Alta Wrote:

(11-19-2014, 07:03 AM)AlphaScorpio Wrote: I am not sure if it's mono it doesn't say anywhere, maybe someone knows? This is the reason I'm not buying them yet, I'd like stereo for sure as mono are 50% less effective.

I use the X-mini speakers to play ultrasonics, they do work. To get a proper stereo effect you'd need two of the speakers and a mono to stereo splitter cable. I have tried using one speaker and two speakers either side of my bed in the past but I can't say I've noticed any difference in efficacy, although it's difficult to be certain. Using two speakers seemed to make me more tired. I'm currently using just one speaker for LTU and I'm seeing results. Something to note is that one speaker on its own isn't very loud and the treble is very uni-directional; it comes out from the speaker in a straight line like a laser. You can test this yourself using FrequenSee. Turning them to full volume causes distortion so I lay the speaker down on its side, pointing straight at my head. This way you get more volume from the speaker than if it were stood upright pointing at the ceiling, without the need to turn the volume to max. Battery life is good as well, about 16 hours on one charge.

Regarding the mono/stereo aspect, although using just one speaker is mono, it still reproduces all of the ultrasonic track surely? I may
be wrong here and I'm sure Shannon can confirm for certain. My reasoning is that if you listen to the song Breed by Nirvana, at 2:06
there is a stereo sweeping effect the goes from the right speaker to the left speaker. If I listen to the song on my two-speaker hi-fi I
clearly hear the sound sweep from one speaker to the other. If I listen to the song using a single X-Mini speaker, I still hear the
full sound but of course it doesn't sweep across, it is just heard coming from the single speaker source. If using one of these
speakers on its own only re-produced half of an audio track I'm pretty certain there would be quite a few returns back to the
manufacturer, no?