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Acoustic Research S700M IEM Impressions

post #1 of 12
Thread Starter 

Just got a pair of s700m from acoustic research, this is so far the best earphone for western musics ( american pops and some orchestras etc. ) I have heard at that price but no one is talking about it here....

 

The build is rigid, the enclosure is metallic (tungsten carbide) while the outer layer of the cable has kevlar content which makes it really tough, yet quite soft

 

 

 

 

Some short impression: (40 hr burn in)

 

Bass is punchy detailed and well extended (it punches really hard )

Mids is clean and falls back a little bit, while the treble is well extended.

It surprises me as the bass is really punchy but still, the mids and treble are well seperated and clean.

 

Sensitivity is low so an amp or a hi-end dap is needed, I'm testing with discmans (d-150/250) and also with ipod classic plus different amps, also using cowon J3 which seems to be lack in output power.

 

They are very comfortable in my ears using their special ear tips. The iem comes with a nice portable case too.

 

 

 

 

Specs:

 

 

 

 

 

 

 

 

 

I have never writen anything for an iem in head-fi but this time acoustic research impresses me a lot.etysmile.gif

Anyone using this iem?


Edited by Rhcw - 5/21/13 at 9:41pm
post #2 of 12

looks like a knock off of the astrotec ax 7 - similar body just different color but its a dynamic driver where as the ax 7 is a dual balanced armature type IEM.


Edited by ayaflo - 5/19/13 at 11:14am
post #3 of 12
Quote:
Impedance is quite high so an amp or a hi-end dap is needed, I'm testing with discman (d-150/250) and also with ipod classic plus different amps.

 

the impedance is 16 ohms! how is it high? - amp is not needed for such low impedance and even a weak source can play it to deafening levels

 

I notice the sensitivity is 90 dB though - which is very much lower than the competition! - this might be the reason for lower volume and your saying that 'amp is necessary'


Edited by ayaflo - 5/19/13 at 11:14am
post #4 of 12
Thread Starter 

This one is heavier than the ax 700( do you mean ax -7 ?), and sound wise I think the s700m is better. also the build quality is better...

I have been listening to the ax 7 for 15 mins and I don't like the sound signature, the mids presentation is too thin and lack in bass to me...

post #5 of 12
Thread Starter 

Oh you are right! I haven't look at the specs and now I realize it....editted


Edited by Rhcw - 5/19/13 at 11:03am
post #6 of 12
Quote:
Originally Posted by Rhcw View Post

This one is heavier than the ax 700( do you mean ax -7 ?), and sound wise I think the s700m is better. also the build quality is better...

I have been listening to the ax 7 for 15 mins and I don't like the sound signature, the mids presentation is too thin and lack in bass to me...

 

 

yeah I mean the Astrotec AX-7. Now edited^^

 

thx

post #7 of 12

from your impressions - sounds like the AX 7 might also be employing TWFK Dual balanced armature which accounts for the thin mids and the insufficient bass- sorry to go off topic but can some one confirm this.

post #8 of 12
Thread Starter 

yes they are twfks... anyway the AR IEM is a DD so I won't compare it with the AX-7...

 

off topic again, got a chance to talk to the engineers from AR today and they confirmed that there will be a lower end and a hi end iem coming soon...


Edited by Rhcw - 5/19/13 at 9:03pm
post #9 of 12
how it compare to other $120us iem(e.g like 215, westone 1, s4i...), i have listen it in a shop , and find out it have really punchy and extended bass, but clear mid and treble, better than s4i, should i buy this for my friend? she loves electronic music like deadmau5 and other western pop music ,thanks
post #10 of 12
Thread Starter 

See if you like the bass impact wink.gif

 

This one is extra bassy and quite treble lacking, will be good when using some (relatively) neutral machines like ipods,

but when it come to some mobile phones and warm sounding machines this may be too much......

 

 

For party musics and western pops this could be a good choice biggrin.gif

post #11 of 12
My friend use sony xperia s , i don't know it is warm or neutral .But i know all sony player normally boost up in treble and bass , i don't know she likes bass or not but i think she like bass since she listen to dj music, thanks for your information
post #12 of 12
Thread Starter 
Quote:
Originally Posted by ellis ip View Post

My friend use sony xperia s , i don't know it is warm or neutral .But i know all sony player normally boost up in treble and bass , i don't know she likes bass or not but i think she like bass since she listen to dj music, thanks for your information

 

Well I tried it with xperia P.....I think the bass is too much...but it depends.....(when you are on trains it may be fine...)

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