OK, I thought that the driver was recessed into the hole. Now that I know its missing I'm less annoyed 😉
TC said:
I see, you haven't, can't, are unwilling, to measure the problem (that will cause *-6-9 db peaks and valleys and is clearly audible)
so who cares???? Maybe the guy that wants to copy it? That was my point.
later,
Is it pretty much accepted that a spiral horn works? That the different path lengths are OK? This would indicate the the augar in a tube type spiral horn might work well too
auger type spiral
In January I looked at the theory of a "spiral horn" as described here:
http://www3.ocn.ne.jp/~hanbei/eng-whyspiral.html
An "auger style spiral horn" can work, at least the mathematics suggest it can.
Hope this is to the point. Not trying to hijack or interfere.
In January I looked at the theory of a "spiral horn" as described here:
http://www3.ocn.ne.jp/~hanbei/eng-whyspiral.html
An "auger style spiral horn" can work, at least the mathematics suggest it can.
Hope this is to the point. Not trying to hijack or interfere.
Variac said:
The beauty of the spiral horn is that all 4 sub horns are exactly the same except for orientation.
An externally hosted image should be here but it was not working when we last tested it.
dave
Spiral Horn -PLD
Path length distance - an infatutation with failure.
Just use a couple of subs (3way) with that big ugly baffle - driver mounted flush and a real tweeter and and don't worry too much 'bout it .
Path length distance - an infatutation with failure.
Just use a couple of subs (3way) with that big ugly baffle - driver mounted flush and a real tweeter and and don't worry too much 'bout it .
Re: Spiral Horn -PLD
Been there, done that... now i'm more interested in enjoying the music....
dave
Magnetar said:
Been there, done that... now i'm more interested in enjoying the music....
dave
I have come in on this late, but to address the original question.
When I was running a big pair of mass loaded voight (6 ft tall), I had my drivers mounted on a 14inch circular baffle with the driver mounted slightly off centre. I then had a small horn tweeter mounted to the side of the main Isophon driver, within the baffle.
The result of having the baffle was to fill out the sound significantly. Definately a mod to include as it was visually good and made a good contribution to the sound. Baffle step circuits are the other way to go, but they are wasteful of power and degrade the pure signal.
Shoog
When I was running a big pair of mass loaded voight (6 ft tall), I had my drivers mounted on a 14inch circular baffle with the driver mounted slightly off centre. I then had a small horn tweeter mounted to the side of the main Isophon driver, within the baffle.
The result of having the baffle was to fill out the sound significantly. Definately a mod to include as it was visually good and made a good contribution to the sound. Baffle step circuits are the other way to go, but they are wasteful of power and degrade the pure signal.
Shoog
So, on that latest baffle speaker with the 4 spiral horns: why are 4 small horns better than one big one? Would one bigger horn witth A single opening couple to the room better for lower bass?
Variac said:
In this case it allows the entire use of the circumferal edge of the box as a mouth... incrediably ekegant. Dividing into smaller sub horns also discourages the formation of longer standing wave/resonances -- this goes back to the multi-cel horn we see in vintage JBL/Altecs.
dave
Re: Re: Re: Re: Spiral Horn -PLD
What a cop out. This is like saying anyone that uses a three way doesn't enjoy the music.
So what single speaker design makes all three-way speaker designs a-musical?
I've built/heard quite a few single driver systems and have never heard one that has enough bandwith quality in the extremes (Jordan, Lowther, Fostex, Phy, ect..) to fullfill my obsession with quality reproduction. But I surely can't sit here and say the better examples didn't keep me from enjoying the music. I enjoy the music just fine with my KLH table radio - but it just doesn't do-it-all like my big rig. On the other hand if the single driver loudspeaker had a good seperate bass and treble system (like using the single driver as a mid) they became much more fullfilling. Lower distortion, better dynamics, much less cone breakup, better power handling, better dispersion, ect.... Don't like passive crossovers? Triamp.
planet10 said:
What a cop out. This is like saying anyone that uses a three way doesn't enjoy the music.
So what single speaker design makes all three-way speaker designs a-musical?
I've built/heard quite a few single driver systems and have never heard one that has enough bandwith quality in the extremes (Jordan, Lowther, Fostex, Phy, ect..) to fullfill my obsession with quality reproduction. But I surely can't sit here and say the better examples didn't keep me from enjoying the music. I enjoy the music just fine with my KLH table radio - but it just doesn't do-it-all like my big rig. On the other hand if the single driver loudspeaker had a good seperate bass and treble system (like using the single driver as a mid) they became much more fullfilling. Lower distortion, better dynamics, much less cone breakup, better power handling, better dispersion, ect.... Don't like passive crossovers? Triamp.
Its a very very well designed 3 way that sounds better than a full ranger with a supertweeter crossed in at well above 10K. In my small experience if you allow the crossover lower than this its very hard to get a satisfactory result. As for bass, if you can live with big speakers then most of the 10inch full rangers will not let you down in a "big" well designed cab.
Any crossover eats up wattage and so moves you out of the super detailed small wattage amplifier designs.
IMHO 3 ways suck big time.
Shoog
Any crossover eats up wattage and so moves you out of the super detailed small wattage amplifier designs.
IMHO 3 ways suck big time.
Shoog
Re: Re: Re: Re: Re: Spiral Horn -PLD
Not at all, just a response to the perceived aggressiveness of your post(s)
A typical 3-way, has XOs where they get in the way, passive XOs that "suck the life out of the music" and dome tweeters -- i've pretty much given up on them...
I've long been a proponent of what i call a "mostly-full range" speaker system. Take a full-range speaker that can be enjoyed in its own right, and extend it's performance with an active woofer and a super-tweeter. But if you can't enjoy the middle driver by itself, then the entire system will suffer.
dave
Magnetar said:
Not at all, just a response to the perceived aggressiveness of your post(s)
A typical 3-way, has XOs where they get in the way, passive XOs that "suck the life out of the music" and dome tweeters -- i've pretty much given up on them...
I've long been a proponent of what i call a "mostly-full range" speaker system. Take a full-range speaker that can be enjoyed in its own right, and extend it's performance with an active woofer and a super-tweeter. But if you can't enjoy the middle driver by itself, then the entire system will suffer.
dave
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