The MA-12C speakers are professional quality, internally amplified monitors that provide a high-impact sound for your computer sound card or module.
- 4' speaker with a 10 watt RMS power amp
- Magnetically shielded so they may be placed adjacent to a CRT display
- Separate microphone, instrument and line-level inputs
Owner's Manual: https://www.roland.com/us/products/ma-12c/support/