Public Concerts with 2x 15 inch Lii full range drivers ?

[RaymondFromThePyrénéés]

The idea is to get into diy speakers

 

[mhardy6647]

Open baffles, besides being exceedingly picky about placement (for good, basic physical reasons) also put drivers at risk due to the lack of proper loading at the drivers' Fs.

Open Baffle

jelabsarch.blogspot.com

They also require drivers of high Qts for best qualitative results. I don't know, but I reckon that Qts of the Lii drivers is pretty low (i.e., horn loading is probably better for them in terms of LF performance).

 

[mhardy6647]

OK, based on a very quick, cursory google, at least some of the Lii drivers do manifest the high Qts that makes them good for open baffles.

DIY Loudspeaker Project Pad | Here are some measurements of the Lii Audio fullrange driver I am working with | Facebook

Here are some measurements of the Lii Audio fullrange driver I am working with. The T/S parameters were measured by J.R. Vansickle. The DATS and REW data were measured by me with the driver mounted...

www.facebook.com

 

[Vandemann]

No, it’s an educated guess based on how similar products work.

That's a belief. Educated or not, it's what you believe to be true.

 

[voodooless]

That's a belief. Educated or not, it's what you believe to be true.

So what?

 

[Vandemann]

So what?

Point is educated believed were once convinced that the sun revolved around the earth. Without measurement or, weak as it may be, direct subjective experience, you don't know for sure. I own them and they don't "shout" at all.

 

[voodooless]

Point is educated believed were once convinced that the sun revolved around the earth.

At the time it was the best we could model with the information at hand, and it worked very well in predicting things like planetary positions.

Without measurement or, weak as it may be, direct subjective experience, you don't know for sure.

Yes we know for sure. Physics hasn’t changed, we can perfectly model what happens with such drivers.

I own them and they don't "shout" at all.

Great, post a spin so we can see for ourselves. As anecdotal evidence goes, some Facebook posts seem to indicate that these speakers clearly beam. I’m sure they can be made to work in a listening room for a small number of people. For a larger amount of people, this will not work well for numerous reasons.

It’s interesting how nobody bothers to measure these things properly, including the manufacturer.

 

[RaymondFromThePyrénéés]

I get it, open baffles might not be all that good after all.

What about making a simple closed box for a 12" driver
without any crossover since there is only one speaker
and add to the 3E7A / WiiM Ultra sub-outlet 2 subs
that I will probably buy used to start with internal amplifiers.

Is that something that is impossible to make, I do know how
to work with wood, but I mean to position the speaker where
it has to be for a good sound and to find measurements
for the box that is good for a 12" full range driver ?

It is more difficult than an open baffle, for sure, but to make
a sturdy box is not difficult. Of course, it will never beat high
end speakers, but it will be cheap so I can invest in good full
range drivers for about 1000€/$.

Or would you rather make me go out and find a used loudspeaker
for this price, 1000€/$ ?

I know about the DIY forum, but they do not have the knowledge
that you have here about hifi, I think.

 

[Chr1]

You could get a very good pair of speakers for that amount of money. Particularly if you buy used.

DIY is not easy to get right, but very easy to get wrong. My 2c.

 

[RaymondFromThePyrénéés]

Perhaps, but it is less fun than to build one
but I suppose that I could never even get c
lose to the result of a used compared to a DIY

 

[Chr1]

If your priority is to have fun building speakers, fine. Do DIY.
If value for money and sound quality are your priority, I'd say buy second hand.

Or you could do both. You have a decent budget there!

 

[DanielT]

Perhaps, but it is less fun than to build one
but I suppose that I could never even get c
lose to the result of a used compared to a DIY

As a first try fun DIY for not much money without messing with crossovers you can try building a pair of boxes for this full-range driver:

SB Acoustics SB20FRPC30-8 based desktop project

Last year I did a project based on Markaudio CHR120 drivers in my home office Then this year when I did my rear speaker project using the SB20FRPC30-8 drivers I really got astonished by these drivers so I have decided to replace my CHR120 desktop system with the SBs I already have the SB...

www.audiosciencereview.com

May require some EQ to get a good FR. Off axes they may not be superb in the higher frequencies but for around $100 for a pair you can't have everything.

Order SB Acoustics SB20FRPC30-8 Full-range Woofer

Buy the SB20FRPC30-8 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

www.soundimports.eu

Edit:
Speaking of TQWT as a construction, which @mhardy6647 brought up in the post below.

SB Acoustics SB20FRPC30-8 (8" Fullrange Cheap Monster II)

I installed SB Acoustics 8" Fullrange(SB20FRPC30-8) in TQWT. Well-extended bass. Natural mid and high range with little grating. High quality throughout the all range, and the performance is above the price.

www.diyaudio.com

The result:

 

[mhardy6647]

Is Wayne Parham's Pi Speakers still around? Simple designs suited to DIY and sold as "kits".
1) Yes, it appears so.

Pi Speakers - unmatched quality and state-of-the-art performance

High-quality, high-efficiency loudspeakers with uniform directivity have been the Pi Speakers mainstay since 1980. From the constant directivity cornerhorns to the matched-directivity two-way speakers, Pi Speakers is the leader in the audiophile market.

www.pispeakers.com

2) Mostly simple designs. Not all.

 

[voodooless]

Also a fun project to build, and probably a better objective speaker overall, would be a much smaller wideband driver in a large back loaded horn. You can find several such projects of varying quality, and they are generally DIY friendly. But these would also not be very useful for a larger crowd. That really needs purpose built speakers.

 

[mhardy6647]

Also a fun project to build, and probably a better objective speaker overall, would be a much smaller wideband driver in a large back loaded horn. You can find several such projects of varying quality, and they are generally DIY friendly. But these would also not be very useful for a larger crowd. That really needs purpose built speakers.

... or a small "BLH" (not quite, technically speaking ): These are folded TQWTs from the 1990s. I had my friend Mike Berg build the cabinets.
I still enjoy listening to these very much -- but, yeah, not for auditoriums.

 

[RaymondFromThePyrénéés]

Thank you. I understood by the comments here that it is quite difficult to do hifi for some 10 persons, so perhaps we can take the number down to 3 or 4, at my home to start

 

[voodooless]

Maybe consider Fostex FE206NV2 in a horn. Plans are on the product page as well. Directivity is relatively good for a wizzer cone speaker, and they are super efficient and can play fairly loud. If your audience is sitting down, this will probably do. Don’t expect massive bass, be depending on the music it may be enough. Next project could be sub to add.

… make the sides transparent, it will a marvel to behold

 

[DVDdoug]

The speakers you talk about here 8 foot speaker stack, is there a DIY plan on how to make them or did you simply let your imagination with your experience lead you to the way you constructed them ?

It's not something you can build. At least not exactly, and you probably wouldn't want to. But hey, they might inspire you to do something crazy! For me, a big part of DIY is building something that you don't find in the store.

Here are my speakers and "giant VU meter" They are more-finished now but no grill cloth yet. I covered them in leather-look viny like they use on guitar amps. It's easy to do, it doesn't look bad (IMO), and it's fairly rugged. (Can you tell I'm a Batchlor? )

I'm sure they don't "measure" that well and with the tweeters on top and the cymbals coming from above I'm not getting an accurate "soundstage" or "image". But they sound "impressive"! I don't take full advantage of them because I have nearby neighbors. They are more of a statement piece... Look what I built and what I have in my living room!

Decades ago, I bought some Phillips/Norelco drivers and a crossover as a set. I'm pretty sure they don't make speakers anymore. They had a book with recommended designs. The 2nd "biggest" design in the book had a 12-inch woofer, four midranges, and four tweeters in a sealed cabinet about 3-feet high. I think the 9-driver "kit" with the crossover was less than $100 USD so less than $200 for the pair! (Not counting the wood which I bought separately)

I've re-built them at least 3-times. One version had white vinyl and black grill cloth. The latest version came when I got a home theater system and needed a subwoofer (or two). The tweeters are louvered and they swivel so they can be "aimed". I was rather happy about how that worked-out!

BTW - My rear speakers are old Pioneer "floor standers" with 15-inch woofers, and they are hanging from the wall near the ceiling above my couch.




...The " VU meter" is just an effect... It doesn't measure dB or anything. It self-adjusts to the average loudness for lots of "meter action" no matter the what the loudness. It's got several modes.., It can go down instead of up, or louder can turn the LEDs off instead of on, it's got a dot mode, and more. Then it's got 6 other sequencing or blinking effects, each with lots of variations. It can be set to run-through everything randomly changing modes every minute or so. It was built with an Arduino microcontroller. I've also been building lighting effects since I was a kid in the days of disco, and I'm still into it. The 1st one was a kit when I was first learning electronics.

 

[RaymondFromThePyrénéés]

I do not want to create any trouble, there is enough already out there,
but I would like to know what you think about this man and his experience ?

 

[RaymondFromThePyrénéés]

It's not something you can build. At least not exactly, and you probably wouldn't want to. But hey, they might inspire you to do something crazy! For me, a big part of DIY is building something that you don't find in the store.

Here are my speakers and "giant VU meter" They are more-finished now but no grill cloth yet. I covered them in leather-look viny like they use on guitar amps. It's easy to do, it doesn't look bad (IMO), and it's fairly rugged. (Can you tell I'm a Batchlor? )

View attachment 526542
I'm sure they don't "measure" that well and with the tweeters on top and the cymbals coming from above I'm not getting an accurate "soundstage" or "image". But they sound "impressive"! I don't take full advantage of them because I have nearby neighbors. They are more of a statement piece... Look what I built and what I have in my living room!

Decades ago, I bought some Phillips/Norelco drivers and a crossover as a set. I'm pretty sure they don't make speakers anymore. They had a book with recommended designs. The 2nd "biggest" design in the book had a 12-inch woofer, four midranges, and four tweeters in a sealed cabinet about 3-feet high. I think the 9-driver "kit" with the crossover was less than $100 USD so less than $200 for the pair! (Not counting the wood which I bought separately)

I've re-built them at least 3-times. One version had white vinyl and black grill cloth. The latest version came when I got a home theater system and needed a subwoofer (or two). The tweeters are louvered and they swivel so they can be "aimed". I was rather happy about how that worked-out!

BTW - My rear speakers are old Pioneer "floor standers" with 15-inch woofers, and they are hanging from the wall near the ceiling above my couch.




...The " VU meter" is just an effect... It doesn't measure dB or anything. It self-adjusts to the average loudness for lots of "meter action" no matter the what the loudness. It's got several modes.., It can go down instead of up, or louder can turn the LEDs off instead of on, it's got a dot mode, and more. Then it's got 6 other sequencing or blinking effects, each with lots of variations. It can be set to run-through everything randomly changing modes every minute or so. It was built with an Arduino microcontroller. I've also been building lighting effects since I was a kid in the days of disco, and I'm still into it. The 1st one was a kit when I was first learning electronics.

Your set-up makes me think about my DIY line arrays that sounds also great but probably do not measure well, I will get to measure them soon ! and I agree, that is what DIY is all about, trying out things that are a bit far out. Yes, I agree, you must be living alone most of the time at least if that is your living room