What's the difference between our FH Full Range Coaxial Horn and our AH High Output Coaxial Horn? Both are quite similar but there are a few differences. THREAD
Let's start with the similarities, both are high sensitivity, arrayable coaxial horn systems that provide precise pattern control to below 400 Hz.
Both are presented in a compact trapezoidal shape which can be used in stand-alone situations or vertical and horizontal arrays.
Both offer broadband pattern control, high acoustic output, and high fidelity but the FH provides extended low frequency response to 54 Hz as opposed to 80 Hz from the AH.
The FH and AH both have the same high frequency horn and utilize the horn within a horn design. The AH has a slightly larger 32 inch external magnet compression driver while the internal magnet on the FH allows for a smaller 30 inch driver.
The deeper cabinet and 15 inch woofer on the FH offers deeper bass extension but less total output than the AH, for a difference of 5dB. While the AH folds the energy around to ensure the cabinet is not so deep.
The AH's higher output comes from our exclusive compression head technology. Each 10" LF driver is loaded by our proprietary oculus phase plugs. Their output is combined into the mouth of the horn via the compression head, which also increases the path length of the LF horn.
The result is high LF sensitivity (and output) and very consistent LF character over a wide range of output.
While the FH is a single amplified loudspeaker, the AH uses one amplifier for low frequencies and a second amplifier for mids and high frequencies as part of a bi-amplified system.
If you need a standalone loudspeaker with good frequency response and pattern control, the FH is your answer.
If you need as much output capability as possible, the AH is your best bet, bearing in mind that an AH system will require subwoofers.
While we didn't touch on the AH4 in this thread, know that the AH4 products extend the range to even higher output applications.