Cheap and Nasty Horn Project
Oh, and one not so cheap and nasty.
Read on.
Having a nice piece of 12mm chipboard lying around the shed, along with some plywood, I decided to spend a couple of rainy days whipping up an experimental horn - and what a beauty it is. I promised my dear wife it would only take up residence in the house for a couple of days whilst I performed a few tests, and true to my word, it is now back in the shed.
My only regret is that in my haste, I failed to take a few pics of the beast with the L&G sitting (or is that squatting), over the 4.5cm slot - port if you will, that exponentially flared into the 90cm mouth of the horn. Needless to say, the combination of L&G and horn presented an imposing sight.
And the sound? Well, lets make it plain that the materials used, in particular the plywood, were a couple of magnitudes thinner than ideal. A lot of energy was wasted through vibrating wood mass. The seal between the L&G/horn is a soft rubber strip i.e. the weight of the speaker made the seal.
A definite rumble around 50Htz could be felt at mid volume, quite pleasing and the speaker did not appear to be impaired by this added appendage.
So, the die is cast. Not now, not tomorrow, but one day, I envisage building two horns out of heavy ply. Joined seemlessly, finished in Jarrah veneer. Getting the ply to bend would be difficult, but not impossible.
Meanwhile, I'll keep the original horn for testing and of course, just for looking at! Many thanks to my old mate Scott Dandridge for helping to cut the radiused edge, and to Barklay for not actually urinating on them.
Meanwhile, here are a few pics of the Decware modified Imperial's in the construction phase. That's me and Jake, with the speakers lashed together for a quick listen - the sound was awesome. The Barklays made do as a midrange/tweeter arrangement. This was using Jake's Gemini CX 1000, 3 way electronic crossover. An interesting crossover, with descreet, selectable crossover points, 12dB rolloff. But noisy - mains hum, tried heaps but could not get rid of it.
Sorry for the rough cut and paste - here's my Dad and I, and Barkley, first day of cutting the wood. Oh, and I'm the old bloke on the right.
Thanks Dad, great job.
Back to...
