Over heating issues, Punisher , aluminium panels

bin them and build some es18's

With regards to fans and heatsinks, that's one for Reay at NCA or Phil B to discuss…

I still think it's a waste of time without doing some serious maths to prove it's going to make a big difference to the amount of power compression in the cab. It's a very small, sealed chamber so it's going to be hot regardless. When I looked into this years back, it wasn't possible to get a decent thickness pipe with a suitable bend into the pole piece in the chamber as it's already so tight to load the drivers. You'd also need a solid core to be worthwhile, and a properly machined finned heatsink in the mouth of the cabs.

Owning Psyco Subs with the heatsink in the same position, it can also cause other issues if you're using the boxes outdoors in direct sunlight as the heatsinks get very hot before you've even switched the cabs on.

As for cost, water cut aluminium plates plus finned, properly attached sinks will likely not be that far off the cost of another box, which also gives more flexibility in future…

burningbush wrote: What about water cooled magnets? Use those CPU radiator thingies.

Haha, I don't think that a radiator assembly would stand up too well to being shifted about!

MarjanM wrote: Well their spec say so, but their recommended dsp settings are telling a different story.

DSP settings provided are for use with subs, so the crossover point is designed for the best transition between the two sections. I've run them down to 90Hz with a butter worth slope, playing pink noise for 10 hours, and they definitely have plenty of juice down there!

Edited by toastyghost - 15 October 2013 at 3:24pm

When i went through the numbers the air conductivity in the chamber was the sticking point, it just wont carry enough energy away even with a high temperature differential,  the surface area of the panel can only transfer so much energy at a given temperature difference and its not high enough to make a real difference.  That and the fact the the access panels are on the sides so not likely to be able to radiate the heat away..

Ive got ali access panels on mine but i doubt there increasing output by much, they get warm but not that warm.  Really they have to be very close to the back plate or connected to the pole piece to remove the thermal resistance of the air and effectively transfer energy away.  I did play around with the idea of cpu heat sinks on a plate on the panel behind the back plate, i put ali panels there with this in mind but never got around to making a plug for the pole piece, a cpu heatsink with fan running can dissipate 300-400W so i can see that working, assuming the fan survives, its not exactly high on my things to do list though.  My punishers are MDF and not the most accurate cabs ive ever built so i kinda decided i would build something elce with the drivers, with magnets in the throat and ali panels on the back, i designed a few but havent got round to building them and testing them yet.   Id say dont run them on big amps like an inf 8, half that power is more like right.   

Cheaper but for no real gain, and you'll have to butcher the existing cabs. Speak to TImebomb on here, he did a lot of research into this but still hasn't done it to his cabs despite having all the tools and capability to do so - that speaks volumes to me.

Any ideas for making aluminium. Could melt some stuff. :)  ...  yes or mine it.  Seriously you buy it as a sheet and cut it into panels.

Heatsinks work by the material (aluminium) and the shape of the panel increasing surface area.  ... yes and no.  They work by thermal conduction of the heat away from the source, so the heat sink will have to contact the source.  Use a metal rod or similar to connect the magnet to the plate.  Increasing the surface area will increase the effect.

As pointed out before there are two issues you need to address and understand first before going down the diminishing returns route - unless you have more time then sense.

How much did your tops cost?