throat 20x 20 cm
mouth 70x40cm
effective horn length 87cm
rear chamber 29liters lightly damped double rear lid
Jbl 2220B
best
mouth 70x40cm
effective horn length 87cm
rear chamber 29liters lightly damped double rear lid
Jbl 2220B
best
Thanks. That is enough info for me to play with similar specs in hornresp. I am playing with the idea of making something like those.
Leif, I thought you used Altec 515? Did you ever compare them against the JBL 2220B? It would save me a lot of time and money if you told me there is not much difference. 😉
I wondered as well if there would be much difference with square versus round horns at midbass levels. I doubt. With compression drivers, yes. For upper mids I have both and the round horns are much nicer to listen to. Possibly I could make eliptical to save space when stacking the horns vertically. Especially with two pairs of midbass horns. 😛
I wondered as well if there would be much difference with square versus round horns at midbass levels. I doubt. With compression drivers, yes. For upper mids I have both and the round horns are much nicer to listen to. Possibly I could make eliptical to save space when stacking the horns vertically. Especially with two pairs of midbass horns. 😛
I´ve had Altec 515s in other horns
much more interested in the Alnico sound from the 2220B.....harmonics....
now it´s Alnico from 75 and all the way up, and I adore it!
can´t help it....
best
Leif
much more interested in the Alnico sound from the 2220B.....harmonics....
now it´s Alnico from 75 and all the way up, and I adore it!
can´t help it....
best
Leif
I tried a somewhst demagbetized JBL 2470 and I think I prefer the raw and gritty sounding ceramic magnets. I am the same with magnets in guitar pickups. So I use the ceramic version of the JBL 2220B.
You are the first that says you prefer JBL 2220B over Altec 515. 515 comes in alnico as well doesn't it? I thought the consensus was that 515 has better mids than 2220B. Could you hear this?
I also tried phase plugs in the midbass horn. It cleaned up the mids somewhat.
as long as they´re not tested in same horn/system it is of no value for comparison
I´m happy and will not experiment with other drivers
First I´ll hook up my F5T choke input edition on the FLHs and I´ll have to solder a lowpass pcb for the x/over
then I´ll run 300B only on TAD 4001/2001
the ss amps seems to match the sonics of my 300Bs and will blend in perfectly
best
Leif
I´m happy and will not experiment with other drivers
First I´ll hook up my F5T choke input edition on the FLHs and I´ll have to solder a lowpass pcb for the x/over
then I´ll run 300B only on TAD 4001/2001
the ss amps seems to match the sonics of my 300Bs and will blend in perfectly
best
Leif
I read in the article that you were building a Pass. I assumed it was a F4 since you want to use it together with a tube amp. I have a 2A3 amp for the compression drivers. I started with a Pass camp amp and I love the sound, so next step is the F4 and F5, for the JBL 2220H (ceramic magnet version).
What about getting a little sweater mids with a 12" driver and deeper horns? Is a 12" impossible to get as low as a 15"? Is it just to make a longer horn? I have tried a few drivers in horn resp but I have not found a good driver yet, except a field coil driver which cost 500 euro and is made in Europe by a member here. That would be an expensive experiment.
I have a pair of "sweet sounding" NIB FANE Studio 8M Alnico...probably won´t contribute below 150 whatever I do
was intended for AG Trio midbasshorn
I don´t lack "sweetness", but I want a neutral, clean system with harmonic richness
nobody says it sounds tube or transistor driven
nothing sticks out
why repair something that works?
the F5T choke input edtion is made to relieve the 300B and get even more slam in the lower midbass....it´s not quite as "instant" as when I use F5T instead of 300B, but the 300B is better at upper freq harmonics...
best
Leif
was intended for AG Trio midbasshorn
I don´t lack "sweetness", but I want a neutral, clean system with harmonic richness
nobody says it sounds tube or transistor driven
nothing sticks out
why repair something that works?
the F5T choke input edtion is made to relieve the 300B and get even more slam in the lower midbass....it´s not quite as "instant" as when I use F5T instead of 300B, but the 300B is better at upper freq harmonics...
best
Leif
Rewind,
The " Classic " 515 driver motor from Great Plains Audio is alnico. Check out their web site. The jbl 2220 is a very good driver however in my horn in my system the 515b sounds better in the low midrange ( 200hz- 500hz ) by direct comparison. The 515b also did better than the EV 15l and EV15b buy a substantial margin. Since I am using original 515b's from the 1960's totally rebuilt by Great Plains Audio I don't know if my drivers sound different from the current GPA offering.
The " Classic " 515 driver motor from Great Plains Audio is alnico. Check out their web site. The jbl 2220 is a very good driver however in my horn in my system the 515b sounds better in the low midrange ( 200hz- 500hz ) by direct comparison. The 515b also did better than the EV 15l and EV15b buy a substantial margin. Since I am using original 515b's from the 1960's totally rebuilt by Great Plains Audio I don't know if my drivers sound different from the current GPA offering.
I know their website and products very well
their by far biggest buyer is a close friend of mine who´s probably bought more than 50 515s for SLOBs and hornloading...
to me they sound more coloured, sweet with emphasis on midbass ompfff.
anyway it´s a subjective hobby and the payer has the last call.....
best
Leif
their by far biggest buyer is a close friend of mine who´s probably bought more than 50 515s for SLOBs and hornloading...
to me they sound more coloured, sweet with emphasis on midbass ompfff.
anyway it´s a subjective hobby and the payer has the last call.....
best
Leif
I'm curious as to why no one has mentioned the GPA 515G series for midbass horns; especially the 16G and 16GHP versions, for their high Fhm and, in the case of the 16G, the low Rms
There are a lot of good driver choices. Bruce Edgar typically used EVM 15L and EVM 15B woofers in his shortened midbass horns. I built conical midbass horns for EVM 15L a few years ago but ultimately settled for the Fane Studio 8M. I don't know of any other 103 db 8" woofers with Fs perfect for a 100 Hz midbass horn (but no lower).
Not exactly on topic, but the title "cons and pros of midbass horns" could be used to describe this video. Imagine being this guy's neighbor...
I feel it is worth sacryficing the sweet mids of the Fane S 8M to reach down low and get a proper midbass slam. I also tried the Fane S 10M but it had almost the same sound.
So I am left with 15" drivers, unless someone knows of a good 12". It need to reach 80Hz at least.
So I am left with 15" drivers, unless someone knows of a good 12". It need to reach 80Hz at least.
Has anyone compared full and short midbass horns with the same expansion and woofers?
The smallest horn I could build in full space was 100 Hz elliptical so the midrange could sit at ear level and all drivers physically time-aligned. For now, I use a pair of sealed 18" subwoofers below which work well. Ideally, if I had the space, I'd make a 50 Hz pair of half horns like Jeffrey Jackson's here and mount them on the walls to low pass somewhere between 100 and 200 Hz.
This raises an important question.
Has anyone tested and compared a full-space mid/upper bass horn to a half (or less) mid/upper bass horn using the same driver and horn expansion? I've modeled and built both (conical half and hypex full), but using different woofers in different horn expansions. Between the two, I strongly prefer the full-space hypex, but of course this isn't a fair comparison since there were several other variables that weren't constant. Short horns typically measure similar to full horn, but how much of the naturalness of the sound is lost? Has anyone done this experiment?
The smallest horn I could build in full space was 100 Hz elliptical so the midrange could sit at ear level and all drivers physically time-aligned. For now, I use a pair of sealed 18" subwoofers below which work well. Ideally, if I had the space, I'd make a 50 Hz pair of half horns like Jeffrey Jackson's here and mount them on the walls to low pass somewhere between 100 and 200 Hz.
This raises an important question.
Has anyone tested and compared a full-space mid/upper bass horn to a half (or less) mid/upper bass horn using the same driver and horn expansion? I've modeled and built both (conical half and hypex full), but using different woofers in different horn expansions. Between the two, I strongly prefer the full-space hypex, but of course this isn't a fair comparison since there were several other variables that weren't constant. Short horns typically measure similar to full horn, but how much of the naturalness of the sound is lost? Has anyone done this experiment?
Just a quick update.
I listened to the exact same dual conical horn leifchristensen has (see post #16) last weekend. The owner also had the same 21" bass horn. Very impressive.
There's little doubt in min mind that hornloading of the midbass and upper bass is better then bass reflex. I'm in the process of getting a midbass designed now. I don't yet what type and if I'll use one or two but we're talking either conical or hyperbolic. It's going to take some time but I can update along the way.
I listened to the exact same dual conical horn leifchristensen has (see post #16) last weekend. The owner also had the same 21" bass horn. Very impressive.
There's little doubt in min mind that hornloading of the midbass and upper bass is better then bass reflex. I'm in the process of getting a midbass designed now. I don't yet what type and if I'll use one or two but we're talking either conical or hyperbolic. It's going to take some time but I can update along the way.
here's a 2220H in a 100Hz hypex Edgarhorn - fwiw I prefer Karlson over horn unless restricted to very low SE power
-the sine result was for the K43 - 2220 had about 10dB higher distortion. B&C's 12pe32 is a good all around horn/Karlson driver.
-the sine result was for the K43 - 2220 had about 10dB higher distortion. B&C's 12pe32 is a good all around horn/Karlson driver.
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Hi man I have Beyma 15P80Fe and I would like you to give me your plans of mid-bass horn 80hz to 450-500hz . Also for what kind of music are those mid-bass horns good? I listen to House Music , Electro Dance Music , Hip Hop.... works good ?