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I am quite surprised at no reactions. They were sold - at least for a while - at 'The Audiophile', Menlyn mall. Quite the beast. The brother of the guy who made them, worked at The Audiophile, but, damn, his name escapes me now. Maybe not Menlyn Mall... Atterbury Food market? Dammit, the old...

Well, stove is in my computer room, it is a cold night (I am wearing gloves, and have a blanket over my legs), so perfect time for a first indoor run. Three minutes in, so far, so good. Still 3-4mins in... Then the little window started cracking. No, it didn't START cracking, it CRACKED...

Once again I was only the innocent middleman - it was my indomitable brother that bought the speakers. Nevertheless, thank you for a flawless transaction - setting up the Klipsch for a proper audition, and even connecting his old speakers for a comparison!

PM sent

Also: Rocket Mass Heaters have a lot of advantages over a conventional wood stove. They: Let off heat gradually over the day, so you don't need to keep tending a fire They burn up the smoke, using that energy for heat, and not releasing nearly as many CO2 emissions into the air. The exhaust is...

I have to emphasize that my little stove isn't the 'real' thing - but it is more than enough for my smallish computer room. In a proper rocket stove, the gases burning at up to 1200Celsius are utilized in a much more optimal way, using a heat riser covered in a baffle, and from there directed...

First burn. It doesn't need real kindling, just a piece of firelighter, some thumb-thick sticks, and it GOES. As per usual in my very un-scientific world, I don't have a proper thermometer, but it got real hot, real fast. After 10-15mins (I only let those sticks burn out to ash), the 3mm metal...

Tubes are 100x100x3mm, and length of stove is 500mm.

Unfortunately my handyman has prostate cancer, so we work if and when we can. Proof of life - 2 very bad pics of 2 stoves taking shape slowly: Feeder tube is probably way too tall, and we may have to add a secondary air inlet for long chimney, but we are experimenting away... not going to...

Way behind schedule, but got most welding done today. Will post some pictures tomorrow and over weekend.

@Timber_MG and @JimGore (and whoever knows IB subs), I can really do with your advice, please... Specifically on the question (please look at my sketchup 3 posts ago): Thank you!

We are trying to gather the necessary materials - not that easy when you live just east of Gatsrand... but hopefully we will start welding early next week.

Just an interesting fyi: race to 350 degrees: rocket oven v electric oven

@1200GXman: the waste oil heater certainly looks impressive. I mean, geez: But, I am going for the rocket stove/mass heater because I have a huge source of fuel in the form of a pine tree forest right behind my house. And the pine trees are humongous! People walk 8km to cut down every...

Chris, surely not for heating a room? We have an entry level Defy gas stove as our only stove, and like you said: gas is much cheaper and much more efficient than electricity, but for heating purposes? The kettle (and the brewing coffee) are just foefies, but damn, it would be nice to have the...

Like I mentioned: I have an old omie few houses down from me who happens to be a master welder. Also happens that he wants to build himself a rocket stove with oven as well. And last, and best, he lives totally off the grid, which means he has gas welding gear. Lucky me, I'd say!

Having measured -13Celsius here last winter, and my poor wife getting up at 5am each morning, I have been looking for cheap, but efficient ways to heat up a room or two during winter. With Eskom as reliable as... well, Eskom, it had to be something not powered by electricity. Enter the rocket...

I am also open to suggestions for 15" drivers - Dewald mentioned he had a few lined up? JimGore found success with four Starsound drivers at R650 a piece! That was 2010 though... I found these after a brief search - Targa TG-1504DW 15″ . R1495 a piece. Thiele parameters are not complete...

To those still wondering about IB subs, I urge you to have a look at JimGore's IB build. Here is a quote of how he described his first listening impression: This is pretty much the same reaction most of the people that built IB subs on the internet have - those that were unhappy were far in...

I am pretty much sold on IB subs. Now someone who knows just need to tell me if two 2x15" manifold subs will work in my room if I place them exactly where the two brown speakers are situated (if I may refer to my silly sketchup again). The most obvious question will be that they are closer to me...