SP-1B is a speaker designed to operate together with the FDM-DUO and FDM-DUOr. It can also be used when unpowered; in this case the input is connected directly to the speaker. It has three operating modes:
- flat mode, produces sound without equalization,
- filtered mode, applies an enhanced 300Hz ÷ 3kHz filter,
- noise reduction mode, allows one of five noise reduction levels to be selected.
Technical specifications
- Power supply: 12 ÷ 15 Vdc (13.8Vdc typical).
- Output THD at 10 W RMS into 4 ohm: < 1%.
- Output THD at 15 W RMS into 4 ohm: typ. 3%.
- Compact dimensions: 110 x 115 x 130 mm (H x W x D).



