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Author Topic: Horns Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 09-22-2003 03:56 PM                        Hi everyone Why does some horns are bigger than others? It's just a matter of coverage or does a bigger horn can operate at lower frequencies? For example, there are two JBL horns, 2380 and 2360. 2360 is bigger than 2380 but has the same nominal coverage, 90°x40°. However the system sold with 2380 has 800Hz crossover instead of 500Hz. Can someone light me? Bye! A  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-22-2003 05:33 PM                     It is the difference between a shotgun and a pistol. While you can go hunting with a pistol, most will opt for the shotgun. The larger the cross sectional area of the horn, the lower the frequency the horn can control. Look at the polar plots of a horn you are considering...those will let you see what the real nominal coverage is. Generally speaking, a larger horn will out perform a smaller one of the same coverage. In the case of the 2380 versus the 2360...it isn't really a close call...the 2360 is FAR superior. Steve  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 09-22-2003 05:41 PM                        Steve So it's just a matter of price? Why should I install a smaller horn instead of a bigger one? Bye! A  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 09-22-2003 08:13 PM                     Steve did not say that it was just a matter of price. He never even mentioned cost. What he said was -- the 2360 is better. He also said that the larger horn would perform better at lower frequencies. This could probably account for your observation that the 2380 has a crossover at 800Hz instead of 500Hz.  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 09-23-2003 01:35 AM                        Manny He said that "Generally speaking, a larger horn will out perform a smaller one of the same coverage". What exatly means "out perform"? I thought "work better" but now I'm not sure! So why one should install a smaller horn instead of a big one? Bye! A  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-24-2003 09:18 PM                     The only reason I know that people install a smaller horn is to save space. If you want to install the 2360, you will need over 1-meter of depth...you would need less than half that with the smaller horn. Steve  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 09-25-2003 03:49 AM                        Thanks Steve! Someone told me that I can use JBL driver without the horn (for little space, a room. How do you think is the loss of sensitivity without the horn? What advantages I have on sound quality and freq response without horn! Bye A  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-25-2003 06:28 AM                     Anyone that would tell you that you can use a driver without its horn is an idiot. The horn actually loads the driver. Don't do it. Steve  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 09-25-2003 08:31 AM                        Uhm, Thanks Steve! Is any publication I can read to know more about this matter? Bye A  |  IP: Logged

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