We come to some limitations that is necessary to mention.
1) As mentioned at the beginning, the material of the Grand VV is solid aluminum and, personally, I have found the same feeling of solidity that I always had alone and only holding a "rock" as the Grand, which, for my taste tactile , is unique and incomparable. However, my feeling is somewhat subjective, given that many of boxmods lovers prefer the warmth and the softness of the wood. So this box is not, of course, indicated to those seeking the naturalness of the contact with a wood.
2) Aluminum has all the advantages that we well know, but its only limitation is perhaps the weight. The Grand VV, as you have seen from the characteristics listed, weighs only a few grams more of the Classic Grand. However, compared to a wooden box, is certainly more heavy, especially if it is a mechanically operated Wood. However, with a Wood box VV, the difference becomes less pronounced, almost negligible, since a box VV in wood of the same category, like the Bogger VV, weighs only about 5 grams less than the Grand VV. Therefore, those who are very sensitive to the weight of a PV, keep into account this point.
3) Sincerely, I have tried to find other defects, but I have not succeeded
TESTS AND COMPARISONS
Here at last the most awaited part of each review, which is that about the performance.
First, a brief mention to the
feeding system: as expected it is completely identical to that of any other REO (which in this area continues to maintain a prominent place, given the ease in the squonking, the abundance of flux and the low pressure that should be exercised to wet well the atom). The bottle and the tube are, of course, the same of the Grand mechanic, so who are already familiar with it will be immediately at his ease... and, then, will find already at home some spare parts too:biggrin:
1. Instrumental measurements
Now, the Grand VV, set to any voltage (from 3.3 to 5.6 v.) and measured without an atom, ie no load, returns exactly the value that was set. "What a great miracle!!!", You're probably saying:asd:. Well, the beauty is that it does the same even under load:wink:, in the sense that with the atom it keeps exactly the voltage set without having a minimal loss. To make certain, the earliest test I did was that of the ceiling: 5.5 v with atom 510 from 2 ohms. The result is that the Grand VV keeps perfectly to 5.5 v (about 15.1 watts) without showing any voltage drops, even after hours of use of the batt. For example, while I'm writing this review (late afternoon), I have within it two AW IMR 18350 mounted this morning, with which I have already consumed approximately 2.5 ml of liquid (so, batt very stressed). I just did a measurement with my digital voltmeter and the result was again 5.5 V under load.
One warning: take these values as "indicative", since we are talking of a VV with a PWM (in these cases, in the absence of an oscilloscope, by a simple voltmeter you can obtain generally an approximate measure of the “medium voltage” (Vmed), but not of the individual impulses which are those that provide the “effective voltage” (Veff) at which we are vaping). Then I’ll also add my personal impressions of its power, trying to be as objective as possible.
Anyway, back to the measurements, I wanted to report another fact, that I do not know how to explain myself. The limit of the circuit of the Buzz Pro is well known to be 15w. I expected so that fitting an 1.5 ohms atom, with circuit set to maximum, the voltage under load should had adapted accordingly: and instead I was surprised! I put an 1.5 cartom (not an atom, because I'm tired of burning them for testing!!!) and the Grand VV has fried it continuing to maintain its ceiling of 5.5 v, which is, doing a little math: 5,5X5,5/1,5 =20.1W. How is this possible? Immediately I thought that they were not effective (because of the business of PWM) but, going to try to vape (because I am masochistic

), I intoxicated to right: maybe they will not have been 20w, but they sure were not the 15w with which I had used the Grand VV until then.
I do not know what to say about it, I wanted to mention in the review only because it is still one more element of information and also because, perhaps, someone might have read something similar in one of the 3d dedicated to Buzz Pro.
2. Impressions of use
After the debut with the instrumental data, I try to describe my personal impressions in the vaping.
The Grand VV is an excellent machine. I must confess that since I received it, I'm not touching another (except to make parallel comparisons). I use it assiduously, not only because I am one of the testers, but also because Grand VV is really very satisfying from all points of view. It 's very comfortable, portable, and a true "combat machine ", like my dear, inseparable, Grand. But also stable, constant and flexible, as only an excellent VV can be. I keep it mostly configured between 14 - 15w (which are my own habitual wattage) and I feel that it really keeps them "in fluency", with a stability and consistency of performance that, given my long drawn (7-8 seconds), I cannot help but appreciate it. Even the 'autonomy appears to be excellent: with a pair of batt, it seems to me that I am able to vape longer than I can do with all my others VV.
3. Impressions in relation to other boxes VV
For what I have seen so far, I am inclined to confirm the positive feedback that can be read on the web about the high quality of the the circuit of the Buzz Pro, because the GrandVV gave me the impression of being equipped with a great circuit, very stable and efficient. Under these points of view, I have no doubt that it exceeds the performance of the various circuits in circulation that I've tried (Murata T-okr, Lm 2596, etc. ..), and from what I can tell "by feel" (hoping my lungs assist me again

), it seems slightly more efficient than the well-known de-swadj3, which, however, has the advantage of not having the limit of the 5.5v. Having this limit, it is obvious that the harder vapers, like myself, have to use atom with low resistances to get more satisfaction, because, using an HVatom, it will not be possible to set the voltage at 6 or 6.5v as on de-swadj3. Fortunately for me, I do not have this problem: I use almost exclusively atom of 1.5-2 ohm (2.5 ohm max), I vape mainly between 14 and 15 watts, and when, on certain occasions, I want to do holes in my throat:smoker:, I appeal to my old good mechanical Grand that, with two IMR 18350, reaches wattages that are prohibitive for any VV.
Here some pictures a part of my family (there was no room for other boxes unfortunately

).
CONCLUSIONS
This boxmod, is really enjoying for me in all its aspects. Maybe, because I have a particular predilection for the products reosmod’s house, or because I found in a single PV, the comfort, the lines and the joys of the Reo Grand combined with the advantages of a good VV, but I cannot help but express a sincere appreciation for this PV. I have made my better for being more honest and objective as possible in describing the PV (which is not easy, given my love for Reos

).
Surely (and this is inevitable) each review is always a bit “polluted”, positively or negatively, by the personal tastes of the one who wrote it, and probably also this is so. Therefore, I do not see conclusion more honest than saying: assess accurately, and listen also all opinions of others who have tried this wonderful mod (
as I always said, the only kind of objectivity we can hope lies in the plurality and never in the judgment of an individual) ..... on my side, however, always to be honest, I must add one last detail: I'm seriously considering getting another Grand VV, saw that my passion has always been the black / black
Good read
Ufo