sfreak Posted April 26, 2009 Posted April 26, 2009 Well, the Nexus is still a good fan in its own right. And $10 off currently is why its cheaper. But for low restriction situations, the S12 is the way to go. I've pretty much been through every brand on there, they being the only two brands that I do trust to have low noise and good airflow.
Paul47 Posted April 27, 2009 Author Posted April 27, 2009 120mm Noctua S12 best for noise to airflow ratio with low air restrictions (Ie. Not tight CPU heatsink fins etc). Got 3 going about 40cm from my ear atm, all running 12V and with a muffled exhaust setup and can't hear them at all. Thanks for this sfreak .... 2 x Noctua S12 ordered today. That's a great site - couldn't help myself & bought a few tools & odds & ends.:eek:
FAPOS Posted May 2, 2009 Posted May 2, 2009 Finished my setup today with 2 of those fans - and they are indeed extremely quiet! 2 of them running at 9v are quieter than the single one i had running at 7v. Have mine switching on when the AVR comes on via an external 12v triggered relay hooked up to a universal plugpack. Should extract the warm air away from my power amp & PS3 nicely. Thanks for the recommendation!
smhub1 Posted April 11, 2010 Posted April 11, 2010 I purchased a 12v 120mm fan from Jaycar, and after some experimentation found that blowing air onto the back plate from an angle has made a massive difference. The whole case is much cooler - you would hardly know that the AVR is even switched on. This is along the lines of what I am wanting to do - although I'm not sure whether I want to be blowing air (a) into the case, ( across the top, or © using two fans, one to suck it out of the outlets next to the heat sink fins and another to blow air across the top. I am now running the 12v plugpack directly off the AC outlet on the back of the amp - this means that it automatically switches off when the amp goes off. It was a european outlet, so just added an aussie adapter & all works sweet. Could you please explain this further. Specifically: Where you sourced the aus-euro adapter you used, How you got the 12v plug-pack to connect with the fan (which, I'm assuming, is either a 3-pin or 4-pin Molex connection), Whether there is scope to power more than one fan (some of the Noctua products allow you to piggyback). I have a Denon AVR-3300 that comes with an AC outlet (230V/50Hz/100W Max). Like you I hope to use the outlet to auto switch on/off a rather sizeable fan inserted into the rear of the cabinet. Unfortunately said outlet is configured around the European 2-Pin plug. Finding adaptors isn't all that easy and as best I can tell you can't go from an unearthed euro 2-pin connection to the earthed 3-pin IEC connectors that all plug-packs featuring 4-pin Molex connectors seem to want. I've spent about a month searching for a solution and am yet to find anything appropriate. The only other thing I've managed to conjure up involves a master/slave power board - where the amp runs from the master connection and the fan(s) via the slaves (I already have an Aus 3-pin to 4-Pin Molex pack that I use for powering external HDDs). That way when the amp is on standby the latter items receive no power, but when the amp is activated, everything turns on.
Paul47 Posted April 12, 2010 Author Posted April 12, 2010 For me the critical heat area was the back right corner - this is where the Onkyo has the video processor, and seems to be where the heat build up is greatest. Blowing area directly onto this area was very effective in dissipating the heat. I also bought a second fan to blow across the top of the case from the other side - I would have preferred to blow air up into the case from below, but cutting out the shelves was too much hassle. The combined effect of the two fans keeps the heat down to an acceptable level. I purchased a 2 pin regulated plugpack from Jaycar & cut off the connectors, then wired it directly to the fans (I cut off the molex connectors). Then used an unearthed AU to Euro adapter plug (bought years ago while travelling o/s) to connect the plugpack to the back of the Onkyo. I also have a master/slave power board purchased from Jaycar (part# N18812 - about $65), but dont use this for the fans, but it could work also.
smhub1 Posted April 12, 2010 Posted April 12, 2010 I also have a master/slave power board purchased from Jaycar (part# N18812 - about $65), but dont use this for the fans, but it could work also. I think I'm going to go with the master/slave power board solution. It affords me flexibility to add more fans, attach other items to the slave outlets like the DVD player and so on, and means I don't have to tempt fate with the electrical gods by stripping wires, soldiering and so on. Also the matter can be finalised by tomorrow - whereas fiddling around with Euro 2-Pin plug possibilities has taken almost a month of my spare time thus far. Thanks once again for your comments. Steve.
michaeljayc Posted April 15, 2010 Posted April 15, 2010 I know this is an old thread, and the original poster has resolved his problem... I had a heat problem with my Integra DTR-8.8 AV receiver. In fact, my original one had a heat related issue where HDMI would fail after 10 minutes or so of the amp being on. It was replaced under warranty and the replacement hasn't had a problem... but it still runs VERY hot, even when not doing anything. As mentioned earlier, the HDMI board is indeed a very hot little number. I solved the problem two ways. 1) I built a fan equipped rack shelf with three 24V fans (running on 12V) positioned to force cool(er) air into the vents on the bottom of the receiver. It's switched on by one of the trigger outputs from the DTR-8.8. 2) I bought a Sherbourn C12 fan unit which sits on the rear of the receiver, sucking warm air away from the vents and directing it out the back. This runs all the time, as the HDMI board is on and gets warm even when the main zone is off (Zone2 is on all the time). You can see some pics of the Sherbourn C12 on my Flickr page. It works very well in extracting heat away from the receiver. Michael.
Vukie Posted June 5, 2010 Posted June 5, 2010 (edited) Im still not sure how this all works, im running a Pioneer 919 in a very small cabinet, i havent had any issues yet but last night opened the front door in my cabinet and found that it was very hot in there, i have since taken the shelving out giving the amp alot more air space above it but on the sides the room is limited. I want to cut a hole into the back of the tv unit and mount a fan there to draw hot air out of unit but i dont believe my amp has the Ac outlet you guys are talking about am i able to buy one of these plugs from jaycar 12V 500mA. cut the end off it and just solder it onto a fan? will that work or is there more to it? or is there anythign in the jaycar range to suit those Noctua Fans? http://www.jaycar.com.au/productResults.asp?keywords=12+v+plug+pack&keyform=KEYWORD&SUBMIT.x=0&SUBMIT.y=0 Edited June 5, 2010 by Vukie
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