Nice vid there Reglar !!!
Amazingly enough I too did my own db test using an amazing iPhone app called Decibel Meter Pro 2
(DMP2) from Performance Audio. Actually I purchased their who package kit that had a variety of apps (7 in all) for only $1.99. DMP2 is great app and pretty accurate. I actually tested the Helix against two other fans; the Silverstone AP121 and Cooler Master Excalibur (CME). I have to say that although the the Helix did better in the db area, when it came to slightly more push, the CME did slightly better.
The clear winner though, when it came to channeling air was bar none
the AP121s. I could not believe for a 1500 RPM fan how much air this fan pushes. It simply has to be experienced by testing them out yourself. Again, great test Reglar...
PS - Hey Reglar, if I were to mail you two of the AP121's to set them up in the same config that you have could you test them? Let me know and I send them out to you. Of course I would need them back and I would email you a return USPS label so all you would have to do is test them. Doing a push config only probably wouldn't push as much air, but doing a Push/Pull (like I did in all my personal tests) is just amazing. Maybe doing two separate vids in a single and dual fan test would be a good idea. Again, let me know... Thanks, later... Special Note:
BTW, the reason why I tested out the CME's is because of these specs, (plus I have a custom made PWM fan controller):
Speed (R.P.M.): 600 - 2000 RPM ± 10%
Air Flow (CFM): 26.4 - 85.6 CFM ± 10%
Air pressure (mmH2O): 0.75 - 3.53 mmH2O
Noise Level: 13 - 30 dBA
Bearing Type: Barometric Ball Bearing
Fan Life Expectancy: 100,000 hours
Voltage: 12 V DC
Current (Ampere): 0.45A Max.
Power consumption: 6 W Max.
Weight: 127.8 g
Connector: 4 Pin
Warranty: 1 year
Here's the direct link:Cooler Master Excalibur
When I saw the specs and then tested these fans out myself, I can say that even at 2,000 RPM these fans truly PUSH a lot of air; twice that of the Helix's, but they're noisy. So I brought them down to around 1850 and the db level was 1 to 1.5 db higher than the Helix's, so completely within toleration level. I'm still amazed that the way these fans are designed that they can produce air pressure of: 3.52 mmH20
at 2000 RPM. I haven't seen that in another 120x25mm fan; especially at 30 dBA. If it's out there please share it. Again, later...Edited by PunkNugget - 6/1/12 at 12:49pm