Yes it can be, and has been done, you need to use acoustic suspension for bass loading.
Cabinet size can then be domestic friendly - just 400mm x 260mm x 160mm
for each speaker, as seen in the Acoustic Research AR7
http://www.derekspratt.com/PDFs/Personal/Audio/AR-7 Speaker Brochure - 1975.pdf
Cabinet size can then be domestic friendly - just 400mm x 260mm x 160mm
for each speaker, as seen in the Acoustic Research AR7
http://www.derekspratt.com/PDFs/Personal/Audio/AR-7 Speaker Brochure - 1975.pdf
Attachments
Really? Doesn't look all that good to me, and if you're using that design as a reference, it appears you'd be happy with the limited output from a single 8" per side. I wouldn't be. Bet the sensitivity is low too.
Actually, given the components, the era AND their popularity, I think it’s pretty impressive in it’s measures. I know I enjoyed my pair back in the day.
Ah, you need to hear a good pair, makes all the difference over judging on looks alone.
Acoustic suspension as a method of bass loading is the secret. Small cabinets
and excellent bass performance, vs big boxy cabinets. Try to get to hear a pair. http://www.mollgaard.eu/history.sandiego.edu_GEN_recording_villchur.pdf
I am not sure it even is possible to do "whole spectrum" with a small two way acoustic suspension speaker, but with a bassreflex box you can come close if you do not overpowering it and use room gain to your advantage
I have. Not particularly impressed.
Secret? It's a sealed box; AS is just a marketing term. Big deal. I have many such enclosures in my main system at the moment and have designed and built many more in the past.
I'm not limited by the need for dinky enclosures or their limited output and low efficiency.
Larger drivers, higher efficiency, increased Vd allowing lower excursion, lower thermal compression and lower distortion at moderate levels, yet the ability to still play clean, loud, when I want to.
I enjoyed my AR8. Good bass for the speaker size, but yes we can do better with modern technology.
Don't think so, as allergic as we all are to marketing hype.
EDIT: some of the following augments the link posted above:
Ed Villchur and Henry Kloss (AR founders) used woofers with free-air resonance around 12 Hz, rising to maybe 38 Hz in a fully stuffed box just over a cubic foot. So, while all sealed boxes have the same physics, the parameters here really are different and, contrary to your assertion, sort of unique.
In 1967, an AR-3 was pretty much as good as it gets by the SQ criteria folks on this forum apply, short of a Concert Grand large Bozak.
Now, can somebody explain to me why we can't buy similar drivers today except for just one or two obscure brands out there?
BTW, I have an AR-1 sitting around somewhere. Makes a very good sub although maybe not the best by today's DIY standards.
B.
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I understand exactly how they work.
Look at the speaker the OP linked; Fs of 25Hz, Fb of 68Hz. Meh. Still an octave too little to be full range for the majority of music out there.
Edit; In 2019, you are no longer solely reliant on electromechanical properties of drivers alone to get the desired result.
Yes. My point exactly. The parameters being a bit different doesn't make any difference to my POV as they work under the same principles and don't break H.I.L.
Look at the speaker the OP linked; Fs of 25Hz, Fb of 68Hz. Meh. Still an octave too little to be full range for the majority of music out there.
Edit; In 2019, you are no longer solely reliant on electromechanical properties of drivers alone to get the desired result.
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So what, do you guys think is a good 2 way low distortion design in 2019?
Methinks the Bliesma 34mm beryllium tweeter coupled to the Satori MW19PNW-4 would be a good contender. The woofer requires only 15 litres ported and we can achieve lower tuning and delay with a pair of side firing passive radiators like SB's SB15SFCR, racetrack ones on the side.
Methinks the Bliesma 34mm beryllium tweeter coupled to the Satori MW19PNW-4 would be a good contender. The woofer requires only 15 litres ported and we can achieve lower tuning and delay with a pair of side firing passive radiators like SB's SB15SFCR, racetrack ones on the side.
Do you not sense a certain contradiction between the terms "low distortion" and "ported" or perhaps "cone"?
B.
Yes, no problem; Because nowadays almost all manufacturers know better than making 8” mid-woofers with high Mms, low BL, high Qts and low Qms. The remaining ones fell asleep (eternally?) listening to their creations.
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If distortions is the criteria, the whole range of Econowave designs should rate pretty high, with compression driver and pro woofer.
But the best 2-way is a 3-way at least when it comes to distortion. And you know what they say about 3-ways too.... 😀
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Built Bwaslo's SEOS15/DE250/TD15M, was coherent but lacked fidelity in the highs. Have since moved on to beryllium compression drivers and am much happier. Wouldn't consider this small though
Agreed was hoping for creative solutions from the experts here 🙂
Jeff Bagby doing not so small standmount speaker using Satori Be Waveguide tweeter and WO24P woofer with SB29NRX passive radiator (Helios Project).
I think its a nice 'compact' standmount speaker with reasonable F6 33.5Hz F10 25.4Hz. Good distortion, smooth power response and superb group delay performance (11ms at 20Hz). The sensitivity should be around 85-86 db i think. Its top quality drivers from SB Acoustics, and it should be an open project, maybe (the tweeter itself still havent launched by SB Acoustics).
I think its a nice 'compact' standmount speaker with reasonable F6 33.5Hz F10 25.4Hz. Good distortion, smooth power response and superb group delay performance (11ms at 20Hz). The sensitivity should be around 85-86 db i think. Its top quality drivers from SB Acoustics, and it should be an open project, maybe (the tweeter itself still havent launched by SB Acoustics).
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