Yes! Quilter amps are fully protected and can drive any load, or no load at all. 

You can use your amp with a 16 ohm load. 

You can use your amp with an 8 ohm load.

You can use your amp with a 4 ohm load.

You can even mix and match for example a 4 ohm speaker with an 8 ohm speaker.

Tone and Master Volume settings will vary somewhat, but it will play fine.