What is the primary material used in the H1-7050?

The H1-7050 is primarily constructed from cast aluminium. This provides a durable and rigid structure necessary for professional audio environments.

What does the 'NoBell' technology refer to?

It refers to the embedded elastomer side panels. These panels dampen the horn, making it acoustically inert and preventing metallic ringing.

What is the throat exit size for this horn?

The H1-7050 features a 25.1mm throat exit. This is equivalent to a standard 1-inch diameter.

How is the compression driver attached to the horn?

The horn is designed for flange-fitted drivers. It uses two M6 holes located on a 76mm (3-inch) Pitch Circle Diameter (PCD).

What type of flare geometry does this model use?

It uses an exponential flare design. This geometry is chosen to maintain balanced output and efficient dispersion across the frequency range.

Can the H1-7050 be used for repair purposes?

Yes, it is specifically suggested as an ideal replacement for horns that have seen better days. It is designed to bolt directly into standard speaker enclosures.

Does this product include a compression driver?

No, the H1-7050 is a horn flare only. A separate flange-fitted compression driver must be attached to it for sound production.

What are the benefits of using cast aluminium over plastic?

Cast aluminium offers superior rigidity and durability compared to many plastics. When combined with elastomer damping, it provides a stable, resonance-free platform for high-frequency reproduction.

How does this horn affect frequency response?

The H1-7050 is designed to allow the output level of the compression driver to remain balanced. It helps prevent significant fluctuations in volume across the high-frequency spectrum.

Is the H1-7050 compatible with all 1-inch drivers?

It is compatible with 1-inch drivers that use a flange mount with a 76mm PCD. Drivers using screw-on threading would require an adapter.

What is the typical price for the H1-7050?

The typical price range for this horn flare is approximately GBP 40. This makes it a cost-effective upgrade for professional audio systems.

How does the 'acoustically inert' feature benefit the user?

An acoustically inert horn does not add its own vibration or 'colour' to the sound. This ensures that the listener hears only the intended output from the compression driver.

Gear article

Celestion H1-7050 NoBell Exponential Horn Flare

The Celestion H1-7050 is a cast-aluminium exponential horn flare designed for professional audio applications. It features a 1-inch throat exit and integrated elastomer side panels to ensure acoustically inert performance for high-frequency compression drivers.

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Overview

The Celestion H1-7050 NoBell is a high-performance horn flare designed to be paired with flange-fitted compression drivers. Constructed from cast aluminium, it is engineered to provide efficient sound dispersion while maintaining a balanced output level across the driver's entire frequency range. Its robust construction makes it suitable for both professional loudspeaker manufacturing and repair or upgrade projects for existing cabinets.

Design and Material Technology

A primary feature of the H1-7050 is the 'NoBell' technology, which utilizes embedded elastomer side panels. These panels are specifically designed to make the horn acoustically inert, preventing the unwanted ringing or resonance often associated with traditional metal horn flares. The exponential flare geometry is calculated to maximise efficiency and ensure that high frequencies remain clear and well-defined.

Compatibility and Installation

The H1-7050 is designed for ease of installation. It features a 25.1mm (1-inch) throat exit and uses a standard flange mounting system with two M6 holes positioned on a 76mm (3-inch) Pitch Circle Diameter (PCD). This specification allows it to be compatible with a wide variety of industry-standard compression drivers. The installation process involves bolting the compression driver to the horn and then securing the entire assembly into the speaker enclosure.

Sonic Character

The use of cast aluminium provides a rigid structure that facilitates high-efficiency output. Because the elastomer panels dampen mechanical vibration, the resulting sound is typically free from metallic coloration. The exponential design ensures that the high-frequency response remains balanced, preventing significant drops in output level across the intended frequency spectrum.

Applications

This horn flare is ideal for audio engineers and DIY builders looking to improve the sonic capabilities of a loudspeaker system. It is commonly used as a replacement part for worn or damaged horns in professional PA cabinets or as a core component in new high-fidelity sound reinforcement designs.

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Frequently asked questions

What is the primary material used in the H1-7050?: The H1-7050 is primarily constructed from cast aluminium. This provides a durable and rigid structure necessary for professional audio environments.
What does the 'NoBell' technology refer to?: It refers to the embedded elastomer side panels. These panels dampen the horn, making it acoustically inert and preventing metallic ringing.
What is the throat exit size for this horn?: The H1-7050 features a 25.1mm throat exit. This is equivalent to a standard 1-inch diameter.
How is the compression driver attached to the horn?: The horn is designed for flange-fitted drivers. It uses two M6 holes located on a 76mm (3-inch) Pitch Circle Diameter (PCD).
What type of flare geometry does this model use?: It uses an exponential flare design. This geometry is chosen to maintain balanced output and efficient dispersion across the frequency range.
Can the H1-7050 be used for repair purposes?: Yes, it is specifically suggested as an ideal replacement for horns that have seen better days. It is designed to bolt directly into standard speaker enclosures.
Does this product include a compression driver?: No, the H1-7050 is a horn flare only. A separate flange-fitted compression driver must be attached to it for sound production.
What are the benefits of using cast aluminium over plastic?: Cast aluminium offers superior rigidity and durability compared to many plastics. When combined with elastomer damping, it provides a stable, resonance-free platform for high-frequency reproduction.
How does this horn affect frequency response?: The H1-7050 is designed to allow the output level of the compression driver to remain balanced. It helps prevent significant fluctuations in volume across the high-frequency spectrum.
Is the H1-7050 compatible with all 1-inch drivers?: It is compatible with 1-inch drivers that use a flange mount with a 76mm PCD. Drivers using screw-on threading would require an adapter.
What is the typical price for the H1-7050?: The typical price range for this horn flare is approximately GBP 40. This makes it a cost-effective upgrade for professional audio systems.
How does the 'acoustically inert' feature benefit the user?: An acoustically inert horn does not add its own vibration or 'colour' to the sound. This ensures that the listener hears only the intended output from the compression driver.