Introduction – The Siren 25 GTA by Digiflavor

The Digiflavor Siren 25 GTA is from a relatively new name on the scene but their sister company, Geekvape, will be well known to many with excellent devices such as the Zeus sub ohm tank, Aegis X, Aegis Boost and others.digiflavor siren 25 gta review

They bring a slightly different take to the table with some very interesting products but the experience from Geekvape means they’ve already cut their teeth.

The Siren GTA 25 is the wider-girthed version of their GTA Mouth-to-Lung rebuildable tank, a rare but welcome sight.

Many new and long established vapers prefer the MTL style or use it in certain circumstances (stealth vaping for instance) and with a few notable exceptions most are replaceable coil types which of course adds to the cost.

The Siren GTA 25 is packaged nicely in a white & red two part box, a product image to the front, logos around the sides, the rear shows product information and an authenticity scratch panel.

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What’s In The Box

  • Siren 25 GTA
  • 1 x replacement glass
  • 1 x spare parts bag
  • 1 x shorter Delrin drip tip
  • 1 x hex/phillips screwdriverIn the Digiflavor Siren box


  • 5ml e-liquid capacity
  • Top fill
  • 25mm diameter, tank body height 43mm
  • 72g dry weight
  • Stainless steel construction with Pyrex glass inner and outer tubes
  • Dual post deck
  • E-liquid restraining cap

Build Quality & Design

The Siren 25 GTA feels very well made. All the threads are smooth with no burrs and all the seals are nice and secure without being over tight.Digiflavor Siren 25 GTA on mod

The drip tip is nice, not too narrow and has a metal body with a delrin cover at the mouth end.Digiflavor Siren gta mouthpiece

The black coating is nicely matt and allows a decent grip when unscrewing.

The top cap knurling protrudes very slightly past the edge of the tank body, allowing good grip when removing to fill without being uncomfortable.Digiflavor Siren top fill

The airflow control ring has a good positive click when adjusting and isn’t so loose that you’ll have to fiddle with it.

Underneath a nice feature is that the gold-flashed centre pin can be adjusted.Digiflavor Siren pin base

The design is quirky and I rather like it.

Digiflavor Siren GTA 25 MTL tankThe build deck sits atop a post and screws into a metal & glass chamber inside the main tank, allowing the user to see the coil and wicking without needing to remove the body and of course, letting others see the action inside.

That post is also the air feed to the atomiser chamber.

The build deck is a decent size with a good 6.5mm between the posts. I was able to fit a six turn twisted coil in place with no problems.

Between the two posts is a knurled and perforated cap, this is intended to prevent e-liquid leaking down into the air flow.

How Does The Siren 25 GTA Perform?

Coiling and wicking the Digiflavor Siren 25 GTA was a simple affair, no cursing this time 🙂

A simple twisted kanthal 6 turn coil fitted easily and the wick is simply trailed down through the two channels into the tank.Digiflavor Siren build deck

Juiced up (50/50 vg/pg) and the Siren produces a good vapour for a mouth-to-lung tank.

It’s not too hot, flavoursome and smooth. Filling the tank was very easy, there’s plenty of room for bottle tips and unscrewing/re-fitting the cap was fuss-free.

The air flow adjustment lets the tank go from a very tight to reasonably loose draw and should accommodate most mouth-to-lung vapers.Digiflavor Siren tank

I didn’t experience any spitting and, true to its intent, the e-liquid cap beneath the coil worked. Even in my pocket I didn’t experience any leaks.

What I Liked

I particularly liked the design of the Siren 25 GTA, it’s different and as a mouth to lung tank it actually delivers on its promises.

What I Dislike

Dislikes? The inner glass chamber doesn’t appear to be replaceable which is a shame (please, if someone works out how, please let me know!).

And of course it doesn’t come in a 30mm DTL version (I can dream).

Final Review Verdict

The Digiflavor Siren 25 GTA is a real star. It fills a place in the market that usually sees little innovation and delivers on its promises.

It provides mouth to lung vapers with a good quality vape and the ability to easily rebuild/wick.

It looks different enough to stand out whilst still being smart. Would I replace it if it was lost or broken? As someone who does MTL from time to time, yes definitely.


  • Unusual design
  • Great build quality
  • excellent mouth to lung vape
  • no leaks


  • Inner glass doesn’t seem to be replaceable

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Build Quality
Ease of Use
Likelihood Of Replacing If Lost Or Damaged
I'm an IT/science/technology geek and I smoked around 30 a day for about 17 years. 8 years ago I started vaping to try and quit tobacco. 6 years ago with the advent of the newer tank devices, I unexpectedly switched entirely! I still vape now and, when I have the time between my family and my work, act as an Independent Vaping Advocate. I support the New Nicotine Alliance (NNA) and do work with Stop Smoking Services to help ensure people get the right, unbiased information.


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