Commercial characteristics
- Sponsor having loaned the product for the magazine: MyFree-Cig
- Price of the tested product: 39.9 Euros
- Product category according to its selling price: Mid-range (from 36 to 70 euros)
- Atomizer type: Classic rebuildable
- Number of resistances allowed: 2
- Resistance Type: Easily rebuildable owners
- Supported Bit Type: Cotton, Fiber Freaks Density 1, Fiber Freaks Density 2, Fiber Freaks Yarn 2 mms, Fiber Freaks Cotton Blend
- Quantity in milliliters announced by the manufacturer: 2
Reviewer comments on business characteristics
Theorem RTA is a rebuildable with the tank under the tray for a classic assembly of the top-coil type. Its peculiarities are at first visual because the body of the atomizer is entirely in pyrex revealing the level of the liquid but also the assembly. The airflow is through its top-cap and the stainless steel Notch Coil is proprietary. However, it is possible to achieve a very classic assembly in single or even dual resistors for the more adventurous.
The pastel blue / green joints soften his style which can also be modified by a steel tank and thus take a completely different appearance.
But at the vape level, what does this resistance give? And for the accessibility of the tray, the assembly, the filling? ...
I have dissected the Théorem for you, a product offered by Wismec, designed by Jaybo and designed by Suck My Mod, a beautiful collaboration which results in an atypical atomizer of 22mm in diameter and a capacity that is not specified on the site official from Wismec but which is barely more than 2ml.
Physical characteristics and felt quality
- Width or Diameter of the product in mms: 22
- Length or height of the product in mms as it is sold, but without its drip tip if it is present, and regardless of the length of the connection: 32
- Weight in grams of the product as sold, with its drip tip if it is present: 30
- Material composing the product: Stainless steel, Pyrex
- Form Factor Type: Kraken
- Number of component parts without screws and washers: 6
- Number of threads: 2
- Quality of the threads: Very good
- Number of O-rings, Dript-Tip excluded: 4
- Quality of O-rings present: Very good
- O-ring positions: Drip-Tip Connection, Top Cap - Tank, Bottom Cap - Tank, Other
- Capacity in milliliters actually usable: 2
- Overall, do you appreciate the quality of manufacture of this product with regard to its price? Yes
Rating of the vapelier as to feelings quality: 5 / 5 
Reviewer's comments on physical characteristics and perceived quality
Regarding the quality of the materials, the thickness of each part is well suited to its function. Pyrex is thick for frequent use and will not break on first impact. Now, no need to let go to test its strength, I'm not sure it will bounce back!
The threads are very good and the seals provide good support for the tank. However, to change the tank, I had to go about it gently and be patient on the first manipulations because the seals are stubborn. Fortunately, as with many atomizers of this type, they soften over time (for my test, two days) and become less recalcitrant for various manipulations.
The tray is divided into two equal parts with on one side the section reserved for assembly and the other for filling with a plastic "plug" that attaches when you have finished filling the tank. This stopper has a nipple which fits into the opening for filling and is provided with a very small silicone gasket. His posture is stable, but be careful not to lose him. The top of the cap is screwed onto a part of the top-cap to facilitate its maintenance or removal.
Overall, the quality is good even if pyrex remains a material always more delicate than steel, obviously. So, for more security, you can opt for the steel tank lined with a pyrex which will act as a shield against clumsiness, but will not give visibility to the liquid reserve, or at least it will be excessively restricted. .
This tank seems very solid and the association is superb. In addition, there is no risk of twisting this part which can be placed at your convenience one way or the other.
Functional features
- Connection type: 510
- Adjustable positive stud? Yes, through an adjustment by thread, the assembly will be flush in all cases
- Presence of air flow regulation? Yes, and variable
- Diameter in mms maximum of the air regulation possible: 8
- Minimum diameter in mms of the air regulation possible: 0.5
- Positioning of the air regulation: Opposite and taking advantage of the resistances
- Atomization chamber type: Conventional / reduced
- Heat dissipation of the product: Low
Reviewer's comments on functional features
I'm pretty fond of this type of atomizer with the liquid under the tray. On the one hand because they are often compact, which unfortunately considerably reduces their capacity but especially for their flavors and the beautiful vapor that some can produce. But they also have a big disadvantage: leaks!
Indeed, most top-coil atomizers have an airhole located on the tank and when you tilt the set-up, the residual liquid tends to flow through the openings. But for the Theorem, I found no leaks.
First of all because the resistance has an enormous diameter of 5mm, which implies a large quantity of cotton in the plunge holes, an amount conducive to blocking these orifices (be careful of capillarity anyway).
Then, the plastic part also acts as a sort of juice drainer with each suction, which allows the residual liquid to drop back into the tank.
Finally, there is no opening on the tank because the air flow is at the top-cap level.
For the filling, there are two very simple ways of proceeding. Either you opt for the syringe by removing only the drip-tip, or the tip of the bottle will require the removal of the top-cap but retains a comfortable ease of use.
The brass pin is adjustable via its screw, but the adjustment range remains limited. This being the case, it comes out sufficiently so that it does not need to be touched.
Another special feature is the two proprietary resistors that are provided (only one on the assembly). The famous Notch Coil.
In stainless steel, they allow you to vape either in power mode or in temperature control. Their 5mm diameter is quite impressive and requires a large wick that prevents the passage of liquid to the plate when it is in place. Be careful, however, not to pack this wick too much to maintain good capillarity and beautiful flavors.
I have no medium or long term visibility on these resistors but, obviously, they work perfectly in temperature control mode (SS) and seem more durable than conventional resistors.
On the other hand, although the taste restored is very good, the result was identical on a classic resistance in stainless steel of 4mm in TC.
For the airflow, it is really suitable for anyone who vapes since two ariflow washers are provided. The first for a medium vape, the second for a very airy vape and it works not bad at all. Rare are the atomizers of this type, apart from the drippers, which offer such a significant air flow.
Finally, this theorem can also be rebuilt in a very classic way, but will require a minimum diameter of 3 4mm resistance.
Drip-Tip Features
- Drip tip type: 510 Only
- Presence of a Drip-Tip? Yes, the vaper can immediately use the product
- Length and type of drip-tip present: Short
- Quality of the drip-tip present: Very good
Reviewer's comments on the Drip-Tip
The drip-tip is bi-material. The base is in stainless steel and the upper part in pyrex.
It is rather short with a basic form. Nothing special, it is made for a daily vape with a common diameter.
The aesthetic is very refined, the steel part forms a kind of brilliant ring on the base. This bi-material effect gives the product a sexy look for a perfect finish.
Evaluation of the packaging
- Presence of a box accompanying the product: Yes
- Would you say that the packaging is up to the price of the product? Yes
- Presence of a user manual? Yes
- Is the manual understandable for a non-English speaker? No
- Does the manual explain ALL features? No
Vapelier's note on packaging: 3 / 5 
Reviewer's comments on conditioning
You will receive theorem in a transparent plastic box with a velvet foam where the atomizer and these accessories rest.
Below, an explanatory note only in English which remains extremely limited in understanding for a non-English speaker.
The atomizer is already mounted with a Notch Coil resistance and its long wick. An additional pyrex tank is provided as well as a stainless steel tank lined with pyrex to give this product a different look.
Two sachets accompany the set. One contains a second Notch Coil resistance, the other contains a washer that can replace the one that is already installed to modify the airflow but there is also a 1.25mm allen key, screws and spare silicone gaskets.
A very honorable packaging that is perfect for this product.
Appreciations in use
- Transport facilities with the mod of the test configuration: Ok for a side pocket of Jean (no discomfort)
- Disassembly and cleaning facilities: Easy but requires a workspace
- Filling facilities: Easy, even standing in the street
- Easy to change resistors: Easy but requires a workspace to lose nothing
- Is it possible to use this product throughout the day with several vials of EJuice? Yes perfectly
- Was there leak after one day of use? No
- In the event of leaks during the tests, descriptions of the situations in which they occur:
Vapelier's note on ease of use: 4 / 5 
Reviewer's comments on the use of the product
On the plate, the negative studs are located at the ends while the positive stud forms a "T" in the center, with a wide opening with two screws for fixing the tabs of the resistor. The wire holes are eccentric to facilitate the insertion of the coil without having to manipulate it so that it is perfectly horizontal
The Notch Coil being already mounted, I tested this first editing:
The resistance value displays 0.24 Ω, which is not strange since the material is stainless steel (SS). On power mode, I stayed between 23 and 30W for a nice vapor and very good flavors. But my preference fell on the TC mode at 190 ° C. The vape is soft, concentrated, with a rather thick vapor in the mouth which reveals the flavor of liquids very well.
Is the atomizer or resistance that allows this beautiful feat?
My second editing was a simple Kanthal coil of 0.67Ω for a similar vape. The result is much the same as the previous one with a slight preference for the TC (SS) mode, which I found the vape softer and rounder in the mouth.
However, the passage for the wicks is really very wide and it is important to fill its openings to avoid having too much liquid which goes up on the plate, but especially to keep a confined chamber which allows to have a round vapor in the mouth. and great flavors. It is therefore necessary to make a large diameter coil, but be careful that the capillarity of this wick is not hindered otherwise you will have a poor rendering.
I will not list all my tests, but I wanted to see the limits of this Theorem with a double coil of 0.1Ω to more than 50 watts. The result is very disappointing. Even if the editing works, the pyrex becomes very hot and the heat really has a lot of trouble dissipating. In addition, the flavors are too hot and not at all realistic.
This atomizer is not made for too low values, the materials do not allow it because the air flow is regulated mainly by the plastic part, which conveys the flow but does not dissipate the heat.
In the use of this product, nothing very difficult but some simple manipulations bothered me, like raising the top cap before filling the ato, because the joint holds (too) well. This simple and recurring operation requires attention and therefore time for fear of breaking the pyrex. It is the same for removing the tank, since to redo your assembly, it must be removed.
On the ring intended for adjusting the airflow, a precise adjustment is difficult because the screwing to block your choice is done a little blind.
Another small defect is its capacity, it is relatively small: 2ml is not much!
But the biggest surprise for this top-coil atomizer is the total absence of leaks. Even lying down, nothing flows.
Recommendations for use
- With which type of mod is it advisable to use this product? Electronics AND Mechanics
- What mod model is it recommended to use this product with? Regardless, a 22mm meca mod suits him very well too
- With which type of EJuice is it advisable to use this product? All liquids without problem
- Description of the test configuration used: see the usage descriptions above
- Description of the ideal configuration with this product: a simple large diameter resistor and greater than 0.5Ω, where with TC mode
was the product liked by the reviewer: Yes
Overall average of the Vapelier for this product: 4.7 / 5 
Link to a video review or blog maintained by the reviewer author of the review
The mood ticket of the reviewer
The Theorem has the ability to provide a nice vapor and especially to restore very nice flavors. However, it does not have the potential to evacuate great heat, because the sharing of the materials which constitute it does not allow it, which obliges to remain in resistive values above 0.5Ω.
This atomizer is a marvel when it works with temperature control, it is an ideal mode for him.
During my tests, I did not see any leaks. It is compact, very aesthetic with its visible assembly and above all it offers an excellent vape.
The resistance owner seems to me durable but remains equivalent, in the vape, to a large diameter stainless steel resistance.
A good product with a good price / quality ratio
Sylvie.I
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