I`m new to 70/100v speaker systems and need some help.
Is it safe to connect a 100v amplifier to 70v speakers?
Edited by jeroen@bmb - 5/15/13 at 2:57am
You can use it as the transformers work at different voltages. The rated wattage is ~doubled, so if you set the speaker to 16 watts you need to calculate for 32 watts if using multiple speakers and calculating to stay within your wattage limit of the amplifier. Also, using a 70V speaker with a 100V amplifier will half the rated low frequency extension. So if the speaker is rated 70hz it will now be only able to go down to ~140hz before distorting. In general you are better off matching it if possible, but the speaker will work.
Another option would be to set the speaker to 8 ohm and use step down transformer for 100V.