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If each driver has a separate enclosure, the bottom driver may be well stuffed which will decreased treble and enhance bass, no electric component is need.
With two drivers the loss of point source dispersion should be consider.
They are very different but the single driver has a presence and speed that it's not there on the 1.5 (they are both 4 inch drivers).
This can be simply a perception of frequency response. With a single 4" driver you're missing a lot from the mid bass down, and a lot less from the double. So a more prominent midrange can make the speaker sound "faster" and with more presence, but that doesn't mean it's more accurate or preferable to everyone. IMO it's definitely possible to successfully integrate other drivers but it's not as simple, easy. or cheap vs a straight single driver.
With a single 4" driver you're missing a lot from the mid bass down, and a lot less from the double.
We would have to know what drivers (& box) he is using to say that. But even a really solid 4” is usually down below the mid bass (40-80 Hz), but they will have limited ability to shift air.dave
Hi, tbh I don't care much about frequency response or accuracy, I only care about the sound: if it's enjoyable to listen to then I'm all for it! Having said that I'm sure that more drivers can be integrated and the 1.5 is not that bad after all, it's just that the single driver approach has a purity to it that it's difficult to replicate (I think Kondo San has said that the combination of SET amplification + single driver speakers brings the most realistic result).
Certainly having solid low bass adds a foundation to the music, but i disagree with your premise that no bass leads to clear sound.I have Alpair 7.3eN in FH3 and the same driver in a big WAW with helper woofers. Except for low bass, and the ease with which they play at high levels, th e2 sound the same.It takes a lot of practise to get decent at EnABL. I have reached the thousands in terms of how many i have done. I could not live for very long with a speaker that has not been EnABLed.dave
I'm using the 47 Labs 4722 in a small room and in full honesty I don't feel I'm missing anything on the low end, it's a spectacular speaker.
https://www.sakurasystems.com/speakers/lens.html[im]https://www.sakurasystems.com/image/4722.jpg[/img]It is rated at 85 dB, meaning it could well have decent extension, but the 5 litre enclosure will be a limiting bass response.But the only important thing is that your hifi connects you to the emotion in the music. I have little (so called) computer speakers with 3” drivers and yes, they have little bass below 80 Hz, but they sound fantastic.What drivers are in the 1.5 way?dave
2 x 4 inch neodymium magnet drivers. They are floorstanders with a TL design (bottom ported), so a bit unfair to compare them to the 4722 who would be by design faster. Sound is very different: clearly a lot slower and with less presence, but better low end and more “laid back” sounding if that makes sense.
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