Primarily, the number of channels - one, two or three. The A500x1 runs in bridged mode and while it will drive a 4 ohm speakers, 8 ohm speakers are recommended.
Generally, the A250x3 is recommended for tri-amped applications, the A250x2 for bi-amped applications, and the A500x1 or A250x2 for full-range passive speakers. If in doubt, ask DEQX for a recommendation for your system and speakers.
The A250x3 is compatible with the HDP-4 and HDP-5. The A250x2 and A500x1 are compatible with the HDP-4, HDP-5, PreMATE and PreMATE Plus.
No, the PreMATE (and HDP-4) do not have a 12V trigger output.
|Frequency response||10 Hz – 50 kHz (+0/−3 dB)|
|Distortion||< 0.0018% (< 10Hz – 20kHz AES17)|
|Dampling factor||> 1000 (f < 20 kHz, Load = 4Ω)|
|A500x1||A250x2, A250X3 Low/Mid||A250x3 High|
|Maximum power, 4 ohms*1||400 WRMS||250 WRMS||100 WRMS|
|Maximum power, 8 ohms*1||500 WRMS||200 WRMS||100 WRMS|