Great speaker Ted, surprised it's still available.
Olimpianative,
Yes it can be used. The Ohms rating stated on an amplifier is generally the minimum, not maximum. The 4 Ohm amplifier will have no problem powering it.
Note that if the power rating of an amplifier is rated at x Watts at 4 Ohms, the maximum output at 8 Ohms can be as little x/2 or ½ the rated output at 4 Ohms. As Ohms go up, maximum SPL (sound pressure level or volume) goes down.
This also delineates the problem of an amplifier driving a lower Ohm load: as the Ohms go down, the amplifier tries to deliver MORE power, likely more power than it’s circuitry is rated to handle. Hope that helps.