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Dual Rythmik FV15Hp`s/upgrade to diy? - Page 9

post #241 of 403
Thread Starter 
There is a part# on the fan, it's about 4.5" in diameter.
post #242 of 403
What's the part number?
post #243 of 403
Thread Starter 
Ah hell, it's at home, I'm at work, be after midnight!
post #244 of 403
Thread Starter 
Here it is.
post #245 of 403
Found it...

http://www.gongqiuxinxi.com.cn/sell/show-172470.html

120mm x 120mm x 25mm.

Can't tell the CFM though.
post #246 of 403
I think you need to be the guinea pig and find the perfect fan for the CV!

biggrin.gif

Here is a good resource I found: http://www.quietpc.com/120mmfans

They seem to based out of the UK, but if you find a fan that you want to use, you should easily be able to find and buy it from a US distributor. I wouldn't be surprised if newegg had a lot of these fans.

While I only had my CV5000 for a short time, I did push it hard and it never got remotely warm to the touch. With that said, even if you get a fan with a lower CFM (which will most likely be the case if you want to go quieter) you should not have an issue with your amp over heating.

Your amp is in a home environment and is not going to be subjected to heavy duty abuse (concerts, touring, etc...) that pro amps are designed for.
post #247 of 403
24 volts
post #248 of 403
I will help shop for one later today when i have a bigger screen than my phone. Do you have a pic of the space it goes in? There are some options with bigger blades but use the same holes as a 120mm. Just have to have the space for them in the case.
post #249 of 403
Thread Starter 
Thanks for looking this stuff up for me guys. It looks like there is room for a little bit deeper fan, about .5" or so,. So, do you think BB would have on of these? Newegg has a bunch but not sure which one to go with.
post #250 of 403
hard to find a 24v quiet fan. im wondering if you may want to use a step down converter so you can use a 12v fan?

http://www.amazon.com/Golf-Voltage-Reducer-Converter-12-40V/dp/B009X1PUQ6/ref=sr_1_11?ie=UTF8&qid=1368023383&sr=8-11&keywords=24v+to+12v+converter


then use a nice quiet 12v fan like this one

http://www.coolerguys.com/840556099741.html
post #251 of 403
Thread Starter 
So, I have to use that reducer to get a quiet fan? That stinks!
post #252 of 403
Possibly. I'm not aware of quiet 24v options. I've also never done a fan mod either.
post #253 of 403
http://www.digikey.com/product-search/en?x=-787&y=-71&lang=en&site=us&KeyWords=p14751

This is what I use and I just got another one for my new amp. $12 shipped, 19dB, 26CFM, if that's the same size you need.
post #254 of 403
Quote:
Originally Posted by bradthebold88 View Post

http://www.digikey.com/product-search/en?x=-787&y=-71&lang=en&site=us&KeyWords=p14751

This is what I use and I just got another one for my new amp. $12 shipped, 19dB, 26CFM, if that's the same size you need.

thats an 80mm fan. need a 120mm one. the 120mm ones seem to have higher DB's. 34DB is the quietest i see
post #255 of 403
Thread Starter 
What DB threshold should I be looking at?
post #256 of 403
looks like the one in there goes anywhere from 27.4 to 45.7 so im thinking you want to be below that right? low 20's or below?


JF1225B1UR00 B, H 100.50CFM 3000转 6.00W 0.50A 45.7195DBA
JF1225B1SR00 B, H 89.87CFM 2700转 4.44W 0.37A 42.8DBA
JF1225-1H-00 B, H, S 80.11CFM 2400转 3.00W 0.30A 39.5DBA
JF1225-1M-00 B, H, S 69.57CFM 2100转 2.40W 0.25A 36.3DBA
JF1225-1L-00 B, H, S 59.57CFM 1800转 1.68W 0.20A 32.4DBA
JF1225-1E-00 B, H, S 47.88CFM 1500转 1.20W 0.12A 27.4DBA
post #257 of 403
The quietest 24V 120mm fan I can find on Digi-Key is this one. The stated size of 119x119x25.5mm is a bit odd though. It is 27dB, which is still a bit loud. It should be possible to slow it down with something like a Zalman Fan Mate. This is just a variable series resistor that can dissipate up to 6W, so it should be usable in a 24V system - or at least worth trying.
post #258 of 403
Thread Starter 
Quote:
Originally Posted by brian6751 View Post

looks like the one in there goes anywhere from 27.4 to 45.7 so im thinking you want to be below that right? low 20's or below?


JF1225B1UR00 B, H 100.50CFM 3000转 6.00W 0.50A 45.7195DBA
JF1225B1SR00 B, H 89.87CFM 2700转 4.44W 0.37A 42.8DBA
JF1225-1H-00 B, H, S 80.11CFM 2400转 3.00W 0.30A 39.5DBA
JF1225-1M-00 B, H, S 69.57CFM 2100转 2.40W 0.25A 36.3DBA
JF1225-1L-00 B, H, S 59.57CFM 1800转 1.68W 0.20A 32.4DBA
JF1225-1E-00 B, H, S 47.88CFM 1500转 1.20W 0.12A 27.4DBA
It always sounds the same to me so yes, it would need to low 20's or lower.
post #259 of 403
Thread Starter 
Quote:
Originally Posted by andyc56 View Post

The quietest 24V 120mm fan I can find on Digi-Key is this one. The stated size of 119x119x25.5mm is a bit odd though. It is 27dB, which is still a bit loud. It should be possible to slow it down with something like a Zalman Fan Mate. This is just a variable series resistor that can dissipate up to 6W, so it should be usable in a 24V system - or at least worth trying.
How would I know if using this would allow enough air flow at the desired DB level?
post #260 of 403
Thread Starter 
Strange no one else on avs has done this to this amp!
post #261 of 403
Quote:
Originally Posted by mal01 View Post

How would I know if using this would allow enough air flow at the desired DB level?

It's going to be somewhat of a guess regardless of whether you reduce the noise by getting a different fan, slowing down the fan or both. There will be experimentation involved. The advantage I see with the Fan Mate is that the adjustment knob allows a range of fan speeds, allowing for maximum experimentation.
post #262 of 403
the one i linked to goes up to 1300 rpm which is right near your slowest speed and does it at 19DB.

it may also move more air at that rpm than the stock one, but its hard to compare those specs
post #263 of 403
Thread Starter 
So Brian, you would still go with the reducer and fan you linked?
post #264 of 403
i personally would, unless someone knows of a quiet 24v fan.
post #265 of 403
Thread Starter 
Trying to figure out how that reducer fits in the chain. I will get two of those and two fans!
post #266 of 403
your just running the wires through it. power into the reducer and out to the fan. nothing is labeled so im sure it comes with instructions for which wires to use. you can put the reducer where there is room for it
post #267 of 403
Thread Starter 
Know of anywhere else to get that reducer? Long delivery time on Amazon.
post #268 of 403
PM a user named Johnplayerson

He has fan modded the cv5000
post #269 of 403
Quote:
Originally Posted by brian6751 View Post

PM a user named Johnplayerson

He has fan modded the cv5000

I just looked at his post in this thread, and he has a very clever solution. He wires two 12V fans in series across the 24V fan control line. This way, each fan has 12V across it and no voltage conversion needed, no power wasted in series resistors.

I just smacked myself on the forehead for not thinking of that. tongue.gif
post #270 of 403
Thread Starter 
I looked at that and can't really see exactly what he did, I did pm him though, guess I need two new fans no matter what though.
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