Best in ear headphones for under 300$? (bass)

The GR07 has wonderfully textured bass. The IE8 has maximum bass quantity, while the FX700 is renowned for its bass quality. They may be slightly over your budget though.

I have only heard one bass heavy phone that meets all your requirements, it'd be the Atomic Floyd SuperDarts.  Deep V shape though.  The other one has microphonics up the [fill in the blank].  It'd be the Monster Gratitude.  

 

The ones that float around Head-Fi that are recommended:

• Future Sonics Atrios
• Sennheiser IE80
• Sennheiser IE8
• Ultimate Ears TF10 (iffy on fit though...  Doesn't fit most well)

 

EDIT: Another upcoming option might be something like the Heir Audio 3.Ai which is coming out soon.  Reviews of the 4.Ai will be coming soon enough, I won't be joining the 4.Ai craze (not yet anyways)...  So wait up for impressions of the 3.Ai if you're interested as they sound nothing like the 4.Ai (from what I've read :p).

Edited by tinyman392 - 8/7/12 at 12:39pm

Agree with the Heir suggestion. They look amazing, and reports are slowly popping up claiming they sound amazing as well.

 

Not much has been talked about the 3.Ai though (it's been focused on the 4.Ais).  The 3.Ai would be my suggestion for the OP since he wants bass.  So the 4.Ai reports will be nil for what he wants.  I am planning on getting a pair of 3.Ai, then the 4s (hopefully).  

 you can pick up slightly used FX700's for under 300, theres one on there right now... for like 245

 

I just lost my pair this past weekend (@#$!!!!!) GONE!

 

anyways, if you want bass, these things are incredible... and their open vented design just adds so much more, every other top tier iem I have right now just can satisy that fx700 sound, its sad. I will have to sell or trade the rest for another pair.

Heir audio 3.Ai would indeed be a wonderful choice. Be putting up a review for it soon. If your willing to wait for it to come out... And possibly wait longer since theyre hand made and theres a line for them, they do a great job.

If you want the best quality bass, look no further than thee JVC FX700. Although the isolation is an issue with some, the bass is unparallel.

Sony xb90ex is the best

what about aurisonics asg 1.2?

 

The voicing is not for everyone.

what does voicing mean?

The sound signature. The ASG 1.2 is treble-recessed.

The 1.2 might be something the OP likes though. I'd definitely look at it if I were him. It works well with deep bass that is fairly linear (but focusing on the sub-bass). Detailed modes with ample clarity. Yes. It has recessed highs (that can take a bit of power from vocals), but for what the OP needs, it should suite well.