Member Reviews: Heir Audio 4.Ai

Beautifully designed IEMs. Great sounding (especially with instrumental/classical music). Very precise imaging. Very good instrument separation, but lacks large-scale soundstage - feels moreso like instruments are playing within a confined area outside/within your head - common to many IEMs (I may be too used to over the ear headphones...). Bass is not very strong, which is okay for a neutral IEM, BUT the bass is extremely "tight", fast, and punchy. Bass could use more extension into the low frequencies (i.e. little bass response for ~10-30Hz). Treble is very precise without becoming sibliant. Mids are not as impactful as some other IEMs, but give a nice "lushness" to the music that...

I listen to a lot of classical music and so for me an accurate representation across the spectrum is a must and the 4ai delivers this excellently. More often than not, midcentric or treble based IEMs tend to have the wow factor at first. So the 4ai for me wasn't impressive at first but once I got used to the sound signature, it has become my favourite IEM especially for listening to large orchestral works. Soundstage is excellent and each and every instrument is represented beautifully. Comfort for me is good but not as good as my SE535. The 4ai however seems to have a lot of fit issues with people who don't have large ear canals. 

Best choice in its price range, but not very bassy though

extremely clear and quite airy. does everything well with exception to bass. bass is very accurate, just isn't very impactful. that isn't to say it has no bass, it definitely has bass, just not suitable for bassheads.

Buy them, if you are looking for headphones in this price range then just buy these. You will not regret it, unless you are looking for an IEM with tons of bass, then these may not suit you.

   First off, these things are drop dead sexy! The wood grain is very nice to look at, and has no scuffs or marks on it what so ever. The acrylic housing is also really nice, It is a deep purple, and it has some metal flakes in it to make it slightly reflective. It is also slightly transparent, so you can see the inner workings of the IEM. As far as fit goes, they are quite comfy, not quite as comfy as my old SE535’s were, but very close. A big part of the fit is getting the right tips for your ears. (I am using the medium blues) These are a very neutral, accurate IEM. Nothing seems to be over emphasized or recessed. The bass had a nice punch, and is textured very well. The...

Here is a link to my review:   http://www.head-fi.org/t/622235/review-heir-audio-4-ai-could-we-have-perfection   These are highly recommended!