Hi-end two way

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celef

celef

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Joined 2012
#1
I would like to build a hi-end two way loudspeaker with a mid-woofer 6-8” in size, what driver would you suggest? I know this is the most boring speaker size in the world, but it is the most efficient size, in sound quality that is!

i want great bass and a fantastic midrange of course, and this is for a small room!
 
#6
-depends quite a lot on crossover freq./slope & higher freq. off-axis performance in relation to tweeter and any potential waveguide in addition to the usual suspects concerning bass extension, box volume and baffle dimensions, required eff. before and after baffle-step, etc..
 
#7
too much choice.

http://www.troelsgravesen.dk/MW19P-8.htm
Paul carmody speedster
http://www.troelsgravesen.dk/AT-SW.htm
http://www.troelsgravesen.dk/Ellipticor-1.htm
http://www.troelsgravesen.dk/Purifi-Be.htm
http://www.audioexcite.com/?page_id=57

https://www.humblehomemadehifi.com/archive.html : The Monitor and L'Orfeo AMT

https://heissmann-acoustics.de/en/

etc
choose your budget, size, DL50 🤔

Edit : small space you said : why not this http://www.eraudio.com.au/505_Mini_Panels/505_mini_panels.html with a descent SS Revelator ?

And some are happy with Linkwitz (rip) two ways as well if you like active.
 
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#11
celef said:
I would like to build a hi-end two way loudspeaker with a mid-woofer 6-8” in size, what driver would you suggest? I know this is the most boring speaker size in the world, but it is the most efficient size, in sound quality that is!

i want great bass and a fantastic midrange of course, and this is for a small room!
Click to expand...
Questions:
1/ Budget?
2/ Driver size -which is it, 6 1/2in / 7in, or 8in? Between extremes of drivers in those nominal size brackets there can be up to 100% difference in Sd, and that makes a big difference to everything else too
3/ Permissible cabinet size?
4/ Desired cabinet load?
5/ Average SPL at the listening position, and desired headroom with that SPL?
6/ Priorities in design -do you want minimal filtering, or not bothered about complexity?
 
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#13
celef said:
I would like to build a hi-end two way loudspeaker with a mid-woofer 6-8” in size, what driver would you suggest? I know this is the most boring speaker size in the world, but it is the most efficient size, in sound quality that is!

i want great bass and a fantastic midrange of course, and this is for a small room!
Click to expand...
Hmm, ideally would choose based on the mean of the desired full-range BW, so sqrt (20*20,000) = ~632.46 Hz XO point

~13543/pi/632.46 = ~6.82" eff. dia. = 8" frame wide range woofer, so to the 1st approximation, so good, so far 😉

sqrt(632.46*20000) = ~3556.6 Hz mean

~13543/pi/3556.6 = 1.21" eff. dia. = 1.5 -2.5" frame? (not current re available wide range super tweeters or even if there's any that can do ~632.46*0.707 = ~447 Hz Fs)

Once one moves outside these parameters it becomes a 'crap shoot' of compromises, so best to choose from the plethora of well done DIY or known consumer designs rather than presuming a 6-8" woofer is best overall option unless planning to use a large 1-1.4" compression horn for mids/HF as the pioneers concluded
 
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#17
GM said:
It's strictly an acoustic power mean the pioneers used for dividing up a given BW.
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It is one factor to consider when choosing how to divide the spectrum into two parts for a 2-way speaker... but I don't think it is the primary factor to consider, yes?

A much more important factor would be taking into consideration the available drivers, and considering their radiation patter, power handling, and bandwidth. It would be really cool if someone could invent a tweeter that could be crossed at 630 Hz AND have a wide but constant directivity AND and smooth frequency response to 20k with no diaphragm break up AND have low IM and harmonic distortion AND be able to play at high SPL... It would be cool.

But more realistically, given todays tweeters, a 1.6k crossover without a waveguide is about as low as we can go... with waveguide we can stretch it down to about 1.2k.

Or maybe I am missing your point ?
 
#19
"i want great bass and a fantastic midrange of course, and this is for a small room!"

When the thread starter has a small room for listening, he should define the listening distance and exact size. This will reduce the options for the 2-way's tweeter. Small is relative and not every tweeter does well in near field.
With a small room, a large woofer may be less suited and a smaller 2-way with an 8" sub may be much better, if high quality audio is the goal. Woofer of even 6" start to be a compromise for low end reproduction. For a high end near field speaker, avery 4-5" should deliver superior mid range down to 80 Hz even at excessive SPL. An active 8-10" subwoofer with a DSP will be a much better option to control the (small) room's critical acoustics.
It should be obvious that low end, high excursion work of a woofer has a negative impact on the mid range. There is no two way speaker that does not profit from a high pass with a separate woofer. Since active technology and DSP based room correction have become so high in quality, while being really cheap, in this situation a sole 2-way seems questionable.
 
#20
celef said:
I would like to build a hi-end two way loudspeaker with a mid-woofer 6-8” in size, what driver would you suggest? I know this is the most boring speaker size in the world, but it is the most efficient size, in sound quality that is!

i want great bass and a fantastic midrange of course, and this is for a small room!
Click to expand...
Room dimensions please if you don’t mind.

And how/where do you intend to place them?

Is this design for dedicated 2 channel music or incorporated into a video system?

Thanks…..i think the MOST important advantage of DIY is the ability to build the perfect speaker for your space.
 
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