CELESTION H1-9040P

Celestion H1-9040P: 1" horn for bolt-on compression drivers in reinforced polymer

The Celestion H1-9040P is a horn for compression drivers with a 1" throat in bolt-on configuration: the driver is not screwed onto a thread but bolted to the horn through its flange. This is the mounting style found on most PA drivers with larger motors, because a flange joint carries the load more evenly than a thread and stays tight after years of transport. The horn body is moulded from fibre-reinforced polymer, which shrugs off knocks and scratches.

At 208 mm mounting depth, the H1-9040P is not a shallow waveguide but a horn with real length. In horn terms, length means the mouth can be larger for the same flare angle, the horn keeps control of directivity down to lower frequencies, and the driver sees a more even acoustic load at the throat. At 0.66 kg it is still light enough to be supported by the front baffle alone. The digits in the model name follow Celestion's convention for nominal horizontal and vertical coverage; the exact pattern is on the manufacturer page linked from this product.

Use and enclosure

The typical job is the high-frequency section of a two-way PA cabinet or a stage monitor with a 1" driver, where the horn is expected not only to deliver presence but to keep the pattern under control around the crossover to the woofer. The longer the horn, the lower you can sensibly cross the driver, and with 208 mm of length the H1-9040P has considerably more margin here than a short waveguide. You need a driver with a 1" exit and a bolt-on flange: from the Celestion range at 42.audio, the 1" compression drivers of the CDX1 series are the candidates, provided you pick the bolt-on version; screw-on drivers are served by the Celestion H1SC horns.

Plan the depth early in the cabinet design. Horn plus driver take up considerably more room behind the baffle than a waveguide would, and the driver body must clear the woofer magnet. A sealed cut-out in the front baffle is all the horn needs; the mouth sits flush or slightly proud of the panel.

What to look out for

• 1" throat for bolt-on (flange-mount) drivers, no screw thread
• 208 mm mounting depth: allow room behind the baffle for horn and driver
• 0.66 kg, fibre-reinforced polymer, built for touring wear
• Set the crossover according to driver and horn length, and measure in the cabinet

Frequently asked questions

Celestion H1-9040P: manufacturer, spellings and classification

Celestion is the British loudspeaker manufacturer Celestion International Ltd. of Ipswich, England; its PA drivers are also known as Celestion Pro Audio. The H1-9040P is a 1-inch horn / waveguide, available from 42.audio, Celestion dealer in Germany, with datasheet and full specifications in the driver database.

At 42.audio you get the CELESTION H1-9040P with all key data in the driver database. More drivers from this manufacturer: Atlas Celestion.