Here is another line of speakers to do some reading about, from JTR..
www.jtrspeakers.com
On that note (pun intended), a waveguide has very little horn loading but is used mainly to control the pattern.What I’ve read is that the horn provides acoustic coupling between the driver and the air in the room. That is, a typical dome tweeter faces very little mechanical impedance when operating. A horn increases the load faced by the driver, which increases its efficiency.
To what might this phenomenon be attributed?
My guess is that the horn can easily put out tremendous peaks compared to cone drivers, without requiring much drive power.
What I’ve read is that the horn provides acoustic coupling between the driver and the air in the room. That is, a typical dome tweeter faces very little mechanical impedance when operating. A horn increases the load faced by the driver, which increases its efficiency.
(written by Bruce Edgar, Contributing Editor - Speaker Builder Magazine, 4/89)
…“We built a little box with a 4-inch driver in it and made it adaptable so that a horn could be fitted on it. When you measure the response (Fig. 1), you see 15dB difference between the two conditions of direct radiation and horn loading.
The frequency modulation distortion products (Fig. 2) for the direct radiator are 25dB down. With a horn on the driver (Fig. 3). the distortion products are 50dB down. So you have a 25dB [decrease] in distortion with a 15dB increase in efficiency.”
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That's an important distinction between horns and waveguides.The most objectionable form of distortion (modulation distortion, i.e., the "mud factor") is also effectively eliminated.
Not really. That's sort of a nice side-effect, though. Horns were initially developed for cinema to allow the flea power tube amps of the time to be useful.Apologies if this is a daft question, but is this a function of their sensitivity? I am aware that horns have high sensitivity, but am unclear on whether the benefits mentioned here are specifically because of this.
Did you mean 4349? When I search for JBL 4347, I find nothing. AFAIK, there is no such animal. As for 4349, they are discontinued (along with 4367), and no longer available new.If you want new then an option is the next tier down, the 4347, reviewed by Amir, about $7,500 at the time, full price.
Probably still within your price when on sale.
And before that, hunting horns.If you think about it, horns are actually older than speakers. The first generation Western Electric cinema speaker used a horn and driver diaphragm originally developed for use with pre-tube phonographs, 100% mechanical without electricity.
Apologies if this is a daft question, but is this a function of their sensitivity? I am aware that horns have high sensitivity, but am unclear on whether the benefits mentioned here are specifically because of this.
Not daft at all. What you are tinkering with is what I've called "Klipsch's Law":Apologies if this is a daft question, but is this a function of their sensitivity? I am aware that horns have high sensitivity, but am unclear on whether the benefits mentioned here are specifically because of this.
It's possible. But I'm not sure @Mort is going to DIY.I think it is possible to DIY JBL M2s for less than $7500.
But if it were me I'd also be looking into the MEH world.
Same here. 3 people are currently building the Hinson MEH's after visiting my place and one decided to build the JMOD MEH.Just to add.
I've had several visits from various hifi enthusiasts to listen to my Multi Entry Horns over the last year.
3 of them are actively building MEHs now, 1 is planning to!
If partial diy is acceptable, the JMOD MEH (PA version of the Hinson's) can be bought as cnc cut flatpack, requires a sub... or 6. The Hinsons can be used without a sub (with reservations) and are better suited to home listening/HiFi. Price difference of speaker elements is quite small (B&C Speakers 10nw76 vs 12ndl88), the coaxial compression drivers are somewhat expensive, both use the same model DCX464. Both of those goes well within your budget.What should I be considering? What models are pretty neutral?
why not try an HT-12 v2 from DIYSG first to get your feet in the horn game. Ask Matt Grant here - http://www.hificircuit.com/community/threads/ht-12-upgrade-crossover.5891/#post-13290I'd really love to try a good horn speaker. I know a bit about the theory behind them but less about the consumer options and prices. Maybe $7500 / pair,?
What should I be considering? What models are pretty neutral?
Why is that?Funnily enough was talking to someone earleir this week who's DIY'd some Jospeh Crowe's and now he's building some Danleys...
I don't think there any reason other than he's trying lots of different types of speakers, no critisim of the Joseph Crowe's, they look (and no doubt sound fantastic), i'd love to have a listen to them and the Danleys.Why is that?
To my eyes, at least, the Back-loaded horn No. 2095 looks like a classic back-loaded horn. That’s a proven concept, isn’t it? It ought to sound good, surely?
Or was it a comment on one of Joseph Crowe's other horn constructions/designs?