Building your own speakers

There’s a “rule of thumb” in the DIY speaker community - commercial designs will retail for about 10x the retail cost of the drivers in a build. The drive units in mine retail at about £730, my crossover components are considerably better quality than those found in most commercial designs and baltic birch ply is considerably more expensive than the mdf/particleboard used in most designs. Once you get into fancy veneers, things get really silly. Retail price would be in the region of £10k a pair.

I have a friend who is a very talented speaker designer - he set up his own company making and selling mid to high-end speakers. They’re highly regarded in the audio press. Although, that in itself isn’t a great endorsement. He bloody well knows his stuff. Fifteen years ago, he was talking about ideas that are still considered cutting edge. Anyway, I have some inside knowledge and insight and my numbers are about right.

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That sounds really interesting, where would you find advise and designs for speaker kits?

Sounds like an interesting retirement project.

There are quite a few sites around, but this is by far and away the best one in my experience:

Troels is a very prolific and extremely talented designer. Several of his designs have also been commercialised as DIY kits.

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Linkwitzlab.com is another DIY site. I have 4 of the designs. Siegfried Linkwitz was also a talented designer.

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Altec Lansing model nineteen remade:

Speaker components —
Low Frequency: 15” bass driver (416-8B) [GPA]
High Frequency: radial phase plug driver (802-8G) mounted to sectoral horn (811B)
Nominal Impedance:** 8 ohms
Crossover Frequency:** 1200 Hz with 50 watt L-pad on the high frequency driver

Enclosure Type: vented
net cabinet volume: 250 liters = 8.8 cubic feet
effective volume: 270 liters = 9.5 cubic feet (with Polyfil stuffing)
tuned to 34 Hz with a 3dB down point at 34 Hz

Sensitivity:** 99 db
Frequency Response:** 34 to 22,000 Hz
Dimensions:** 40” H x 24” W x 20.5” D

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This is a massive understatement.

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I really, really want to hear a pair of the LX521s…

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My friends going to be 3d printing some cabinets to make some small active speakers and an isobarik sub woofer.

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can always post on the OPLUG forum for an audition here

https://oplug-support.org/viewtopic.php?f=28&t=2787&start=100

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Cool idea, would love to see how they turn out.

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Fantastic, thanks!

Hope you get to find a place to listen. mine are playing away as I browse the community

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Did you build your own? I guess it’s very subjective, but how do they compare to regular ‘box’ loudspeakers?

The listening experience is very individual but I would be lying if I said I can go back to BOX speakers for 2 channel right now. Maybe I am biased just because I built them. I’ve heard another pair in a better room and its hard not like them.

My build log is here LX521 Build Logs but MagicLX521 has options for DIY and assisted stuff.

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Very thorough and detailed build log - nice work!!

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Will post them when he’s done. Hee waiting on a few parts to arrive

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This is the subwoofer he’s building.

Very cool. I had no idea about the range of stuff that can be 3-D printed.

Sadly my balcony is now built in so no more area to diy such a large project. These were like the 5th or 6 pair in world completed…I got to hear a friends pair before I built mine, and since then a few more builds have been completed here in Singapore, but still maybe only 5 or 6 pairs here. MY Orion’s were 2nd hand and factory built in the USA. But the Pluto and LXmini I have I also built myself.

It’s hard not to love them, but the WAF is a bit out for anything but the Orion’s in my house…so they get the lounge and the Lx521 are in the office that I also now share with the mrs. I think she just ignores them now.

Nicely logged :+1: