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14th January 2017, 09:04 PM #1Senior Member
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Soundabar Build With Sub, Tassie Oak and African Ironwood WIP
I started putting this in my toy thread but it doesn't really fit so here it is.
I had a listen to a few soundbars and I couldn't really see the value in them and they pretty much have to sit on top of a TV unit looking ugly and sounding average.
So, I'm a bit of a horder and have a bunch of speakers and things lying around so it seemed like something that would be fun to build.
Speakers are two 4" Audax something somethings and some Vifa tweeters with the faceplates removed so their shape will be roughly mirrored in timber, the sub is an Earthquake SWS 8 which is happy in a tiny box.
The front boxes are 2.3L and will be port tuned to 85Hz, the sub will play down to a very poor 50Hz before output drops rapidly but it i still enough for a soundbar(of sorts)
We need a new TV cabinet so it made sense to make something that would fit the slot normally directly under the TV, this will be custom made so I can design it around this speaker.
Power and signal will be taken care of by a remote controlled 4 input preamp, a bluetooth 4.1 board, an FM tuner module, and the other inputs will be for the TV and DVD player. We had a spare 12V AC transformer after swapping the garden lights to LED it has 150W output which is enough.
Only did one end to make sure it was all possible, it's a bit tricky as the face is angled and the speakers have to be routed from behind to match.
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14th January 2017 09:04 PM # ADSGoogle Adsense Advertisement
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16th January 2017, 08:34 PM #2Senior Member
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Didn't get a huge amount of time to have a play today but I got all the holes in then rather stupidly messed one up so the outers of the 4" speakers are now a bit of an oval shape, se the router a bit deep
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16th January 2017, 08:56 PM #3
I've always wondered what the stereo separation is like from such a small width. Conventionally, speakers are 3-4m apart, depending on listening distance of course.
Looks good though.
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16th January 2017, 09:05 PM #4Senior Member
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Yeah it won't be fantastic but it will sound nicer than mono, the ports have about a 15 deg angle on them to try to fill the room with a touch more midbass/midrange.
I know both drivers sound fantastic but I have never run a tweter without a stock faceplate or had tweeters so close together, the angle towards the centre of the face has a steeper angle to try to alter the dispersion.
It's all an experiment, if it doesn't work I'm down maybe $50 in wood and consumables so it's not a huge loss.
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17th January 2017, 08:30 PM #5Senior Member
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Almost done, the face piece was a bit of a test as I am not a fantastic woodworker, I have a bench seat with three legs as my work bench, hahaha!
I had to match the speaker mounting angle to the angle of the face so I made two wedges up, glued them on then routed through to get the angle I wanted then I chipped them off.
I doubt anyone will notice the speakers are angled, but hey, it will hopefully sound a touch better and it was a good learning experience.
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18th January 2017, 08:40 AM #6
I like your all-in-one design and the curved front panel.
It will be interesting to know how it sounds.Scally
__________________________________________
The ark was built by an amateur
the titanic was built by professionals
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18th January 2017, 08:22 PM #7Senior Member
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Thanks, I think I''ll have to have the sub turned off or down if the PVR is going as spinning hard drives don't like vibration very much.
Just have to mount the speakers and fith the top on and it's done, oh, I have to modify some previously built crossovers, waiting on some zero inductance resistors to lower the tweeter's output as they are more efficient and a lower imperdance than the woofer.
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19th January 2017, 08:17 PM #8Senior Member
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Whipped up the crossovers tonight, they aren't pretty but I had stuff lying around so I used it. L pad attenuator isn't made yet, guessing it will have to be about 5dB but I will fire the speaker up before making anything then see how much the tweeters dominate.
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24th January 2017, 08:12 PM #9Senior Member
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Amp arrived yesterday and it is an impressive little unit, puts out enough power for the speakers to start hitting their mechanical limit, yet to try it wihth the sub, I'll mount that Thursday.
I do have to stiffen the top panel as it seems to resonate and increse the midrange at higher levels.
Sound is directional as expected but it sounds nice and natural, I am going to add a cap to limit the lower frequencies the mids see, it should also leave a bit more power for the sub and drop operating temps a bit.
Sadly I killed a dustcap so I have two new textile(currently plastic) ones coming from China, I love China!
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EDIT- I am house sitting and managed to find a use for one of those stupid vibrating platforms.
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1st February 2017, 12:16 PM #10Senior Member
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Got most of the other bits for the mini amp, still waiting on the second amp as it will be running a passive crossover in dual amp mode.
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2nd February 2017, 10:38 PM #11Senior Member
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Turns out I got a FM transmitter and not a receiver so I went out and bought a digital/FM one, then I gutted and modified it to suit my needs.
We have no DAB+ here yet but I couldn't find any FM tuners with a decent screen so I bought A Bush pocket radio. At $70 on sale it wasn't super cheap so I had to be careful not to damage the board when de-soldering components, I did lift one section but luckily the pad(?) next to it did the same thing.
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Started wiring but am waiting for the tweeter amp to arrive so can't go too silly yet.
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The top of the amp will be an offcut of some super on trend upcycled Ironbark-
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3rd February 2017, 07:16 PM #12Senior Member
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Started the front panel today, some routing and much head scratching was done. Had to remove the volume control and will later remote mount it, I will also be removing all of the buttons on the radio and replace them with larger momentary switches after I get the second amp, can't do much 'til then-
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Ahhhh, this silly website and it's love for rotating pictures!
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4th February 2017, 03:39 PM #13Senior Member
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Hmmmm, do I try and colour match the front piece with the rest? It is an offcuts box
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7th February 2017, 03:31 PM #14Senior Member
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That's the hardest part done, rotary encoder mounted, buttons with LEDs in and wired, digital radio and preamp display in. The back half of the amp is pretty easy.
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25th April 2017, 10:03 PM #15Senior Member
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This was abandoned, it was rubbish.
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