7 volt trick sunon fans failed???

[lapdog]

7 volt trick sunon fans failed? are they know to fail? if so whats a good 120mm fan to try it on or are the panaflos l1 a better bet for low noise?

 

[GiZzO]

Not all 12v fans will start up at 7v.

Papst makes a really great 120mm Vario fan, would be my top choice as the best quiet 120mm fan.
Its thermaly controled has 2 speeds:

22db / 41.2cfm
39db / 82.4cfm

I think about 30C it kicks into high gear, but i think you can over-ride this, and control it yourself. The Panaflo L1a will work at 7v, but it not all that quiet still.

GiZzO's Fan Page

 

[lapdog]

is the 30 dba the panaflo 120 mm loud just bought 2 27 dba 92mm l1 and 3 80mm 21 dba the quitest i could find. putting 92 in front (in) and back (out) and two 80 on side (in) and 80 on top (out) you think premier 300 watt will be anough power

 

[Supradude]

The sunon full power draws quite a bit, i had a rheostat dial on one and only could lower maybe 5 % before it would stop, the "quiet" 120 sunons are a bit more scalable but i've never used the 7v mod

 

[lapdog]

how much is sound lowered in 7 volts and what kind of air flow is lost? I do have a sunon 120mm low rpm fan i could try it on, would it be better to run a Sunon 120mm 35.5 dba 69 cfm at 7 volts "if it works" or a panaflo at the full 12 volts 92mm dba 27 cfm 42

 

[Supradude]

this i don't know, but since you have both fans why don't you try both and see which is better for you noise/performance