PENON TURBO

The Turbos are extremely cohesive, as fast as their name suggests, and pack a wallop. Bass texture is impressive.
There's a satisfying sense of fullness to the Turbos' midrange.
The Turbos' soundstage width is slightly above average. Imaging is very solid and dynamics are satisfyingly strong.
Resolution is very good.
The Turbos possess a tremendous sense of speed despite their huge bass presence, which will be especially appreciated if you listen to fast-paced music with busy passages.

https://www.head-fi.org/showcase/penon-turbo.26608/reviews

The main dynamics of the Turbo are transients, Turbo puts out a nice level of bass. There is truly a complete story here, one that is actually focussed on the tri-band crossover, and tri-band sound tube arrangement. And it is this specific separation that is really the star of the show. Both good at vocals and bass. It was new to me just how the Turbo could perform. The way it does bass sounds, and the character it has for vocals. Of course the treble isn't too shabby either.

https://www.head-fi.org/showcase/penon-turbo.26608/reviews#review-31534

The PENON TURBO for me is the best sounding IEM so far I have heard from them period.
I really like how smooth and natural the vocals are on the Turbo and fatigue free.
The TURBO is a expertly tuned IEM, a true gem in a sea of neutral or bright BA sets that try to go for a flatter frequency response. The TURBO does it for me and anytime I find myself just listening to music and not the gear attached to my head that’s a full win in my books.
THE PENON TURBO IS THE MOST ORGANIC SOUNDING NON DARK PENON TO DATE FOR ME!

https://www.head-fi.org/showcase/penon-turbo.26608/review/31408/

Turbo is not all bass, you gotta remember it's got the Penon name associated with it. It's technical yet musical bassy in performance. It’s after all a true Penon IEM but one with a trunk of funk added to its bass BAs. With a two step bass boost you get something that sounds more like an ISN IEM, specifically the EST50 comes to mind, yes it's very noticeable without it, it sounds like a traditional all BA set, a damn good one. Despite Penon making numerous IEMs. They only have 2 prior BA sets, the Sphere and the Legends. All their others are dynamics, hybrids or tribrids. So it was time Penon introduced a mid range all BA set that had something new going on and that is exactly what the Turbo represents.

https://www.head-fi.org/showcase/penon-turbo.26608/