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Low Earth Orbit
DIY Audio
Steering advice for those serious about DIY speakers.
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<blockquote data-quote="John Roberts" data-source="post: 24493" data-attributes="member: 126"><p>Re: Steering advice for those serious about DIY speakers.</p><p></p><p>Phil is already arguing what is normally my side of the argument, while i routinely caution against second guessing the real loudspeaker engineers when it comes to dialing in DSP/crossovers, easily an order of magnitude simpler than passive crossover design**. With the new information about how small the odds are your DSP is actually doing what it says it is (thanx grasshopper) and this gets even more difficult. </p><p></p><p>But just to explore the other side of the arguement (no not trolling), there is a long tradition in small sound companies rolling their own cabinets, as a simple investment in sweat equity. Back in the old days they pretty much copied from a short list of classic proven designs, or ventured out on their own, with mixed results. More recently we saw the "will be a" classic LAB sub, thanks to the engineering talent of TD. </p><p></p><p>That LAB sub was a near ideal model to follow. A knowledgeable designer working interactively with a interested community to help define the important design targets. While for obvious reasons we aren't likely to enjoy another TD experience, we have enough collective wisdom here to at least identify the heavy lifting and seek out decent answers. </p><p></p><p>As has been already stated, this will not save you money, if you have any other productive stuff to do with your time, but if you have more time than money and access to basic woodworking tools this could be a good learning experience. You may only learn to never do something like this again, but if it turns out well, it could be worth time spent and a source of some pride of personal accomplishment. </p><p></p><p>JR</p><p></p><p>*** Back in the '70s I considered selling a time aligned hifi speaker kit, through my kit business. I had a real speaker designer who had designed bookshelf speakers for a couple companies (Ohm, Bozak, and a small company Fourier) who was willing to assist me. His weapon of choice for designing the passive crossover (recall that this was back in the '70s) was a programmable HP calculator. His crossover program took so long to run, that he would start it and let if run overnight. Today your cellphone probably has more computing power! FWIW I never did the speaker kit, so you know how my personal judgement falls on this. </p><p></p><p>PS: I got building speakers myself out of my system, earlier in the decade. Later working at Peavey it was really nice to have a whole department of competent transducer engineers that we could point at a project (For example I was able to use Charley's quadratic horn in a plastic box I was involved with), real industrial designers to make it look sexy (well sexy for Peavey). <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile :-)" data-smilie="1"data-shortname=":-)" /></p></blockquote><p></p>
[QUOTE="John Roberts, post: 24493, member: 126"] Re: Steering advice for those serious about DIY speakers. Phil is already arguing what is normally my side of the argument, while i routinely caution against second guessing the real loudspeaker engineers when it comes to dialing in DSP/crossovers, easily an order of magnitude simpler than passive crossover design**. With the new information about how small the odds are your DSP is actually doing what it says it is (thanx grasshopper) and this gets even more difficult. But just to explore the other side of the arguement (no not trolling), there is a long tradition in small sound companies rolling their own cabinets, as a simple investment in sweat equity. Back in the old days they pretty much copied from a short list of classic proven designs, or ventured out on their own, with mixed results. More recently we saw the "will be a" classic LAB sub, thanks to the engineering talent of TD. That LAB sub was a near ideal model to follow. A knowledgeable designer working interactively with a interested community to help define the important design targets. While for obvious reasons we aren't likely to enjoy another TD experience, we have enough collective wisdom here to at least identify the heavy lifting and seek out decent answers. As has been already stated, this will not save you money, if you have any other productive stuff to do with your time, but if you have more time than money and access to basic woodworking tools this could be a good learning experience. You may only learn to never do something like this again, but if it turns out well, it could be worth time spent and a source of some pride of personal accomplishment. JR *** Back in the '70s I considered selling a time aligned hifi speaker kit, through my kit business. I had a real speaker designer who had designed bookshelf speakers for a couple companies (Ohm, Bozak, and a small company Fourier) who was willing to assist me. His weapon of choice for designing the passive crossover (recall that this was back in the '70s) was a programmable HP calculator. His crossover program took so long to run, that he would start it and let if run overnight. Today your cellphone probably has more computing power! FWIW I never did the speaker kit, so you know how my personal judgement falls on this. PS: I got building speakers myself out of my system, earlier in the decade. Later working at Peavey it was really nice to have a whole department of competent transducer engineers that we could point at a project (For example I was able to use Charley's quadratic horn in a plastic box I was involved with), real industrial designers to make it look sexy (well sexy for Peavey). :-) [/QUOTE]
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