Eminence APT50 + APT150S horn (100deg x 50deg)

A high-frequency solution designed for custom loudspeakers

The Eminence APT50 combined with the APT150S horn provides a high-frequency solution for loudspeaker manufacturers, technicians and musicians looking to upgrade a speaker cabinet. The compression driver handles the high frequencies, while the APT150S horn controls their dispersion throughout the space.

This configuration stands out for its constant-directivity horn. Rather than excessively concentrating the highs into a narrow beam, it helps maintain more even coverage for listeners positioned in front of the loudspeaker. It is a relevant choice for building a clear, articulate system with greater definition in the upper part of the frequency spectrum.

Which speaker cabinet projects and musicians is it suited to?

This horn-loaded tweeter is primarily intended for musicians, repair technicians and experienced DIY builders designing or modifying a loudspeaker. It can complement a bass or midrange loudspeaker to reproduce the harmonics that add detail to pick attacks, bass slapping, keyboards and modeling signals.

It naturally fits into a bass cabinet, a compact PA loudspeaker, a stage monitor or a full-range system intended for a preamp, multi-effects unit or power amplifier. Its 100 x 50-degree coverage is particularly well suited to loudspeakers designed to cover a wide listening area while limiting vertical dispersion.

For use with electric guitar, this component is primarily intended for a modern full-range configuration, for example with an amp and virtual cabinet processor. It is not designed to reproduce the character of a traditional guitar loudspeaker on its own: its role is to add high frequencies to a properly filtered system.

Controlled dispersion to effectively complement a loudspeaker

The APT50 is paired here with the APT150S horn, a 1-inch throat model. This combination ensures consistent integration between the driver and the waveguide, with 100-degree horizontal dispersion and 50-degree vertical dispersion. The result promotes more even listening across the width of the space, especially when several people are positioned in front of the loudspeaker.

The stated response from 3.5 kHz to 20 kHz allows this assembly to handle the upper part of the sound spectrum. To use the tweeter properly, its installation must be combined with a suitable crossover. A crossover frequency from 3.5 kHz with a 12 dB slope provides a relevant starting point for protecting the driver and ensuring a balanced transition with the main loudspeaker.

Installation is carried out using screws. The horn is designed for 1-inch output drivers featuring a compatible external thread. Its compact format makes it easy to integrate into custom enclosures, provided the cutout dimensions are respected and suitable internal volume is allowed for the associated bass or midrange loudspeaker.

Precise, open and present highs

The Eminence APT50 with APT150S horn delivers clear and direct reproduction in the high frequencies. It brings out the snap of bass played fingerstyle or with a pick, the attack of notes, harmonics and the details of a processed signal. This definition can help an instrument stand out more clearly in a dense mix without having to push the overall volume excessively.

The constant-directivity horn helps maintain more balanced dispersion depending on the listening position. The highs gain projection and intelligibility while remaining more controlled than with very wide dispersion in all directions. The result will naturally depend on the crossover used, the associated loudspeaker, the enclosure and the system's EQ settings.

For bassists playing funk, fusion, pop, modern rock or metal, this assembly can enhance the precision of the upper register. It is also suitable for setups using amp simulations, digital effects or preamp pedals, whose nuances and extended bandwidth benefit from dedicated high-frequency reproduction.

Technical specifications

Frequency response - start	3.5 kHz	Throat	1 "
Frequency response - end	20 kHz

Type	compression driver with horn	Minimum impedance	7.7 ohms at 6 kHz
Driver	Eminence APT50	Recommended crossover frequency	3.5 kHz
Horn	Eminence APT150S	Recommended filter slope	12 dB
Horn type	constant directivity	Dispersion	100 x 50 degrees
Mounting	screw mounting	Width	192 mm
Horn material	ABS	Height	114 mm
Frequency response	3.5 kHz to 20 kHz	Depth	130 mm
Power handling	35 W AES	Recommended cutout	170 x 86 mm
Nominal impedance	8 ohms	Weight	0.86 kg