ELAD-SP1A is a speaker born to cooperate with the FDM-DUO and the FDM-DUOr.
It is possible to use it even if it is not powered, in this case the input signal is connected directly to the internal speaker.
It is quite compact, measuring 110x115x130mm (height, width and depth).
Power: 12 to 15Vdc (13.8Vdc typical),
THD for 10W RMS outbound on 4 Ohm: <1%,
THD for 15W RMS outbound on 4 Ohm: typically 3%,
Maximum incoming audio level on 50 Ohm for 15W RMS outbound: 1.4V RMS.