Two speakers one amp?

Hi,
I have a pair of Prima Luna Prolog 7 Mono block power amps with 2/4/8 ohms plugs 70W each.
I have a pair of Vienna Accoustic Mozart Grand SE Speakers rated 4 ohms
I have a pair of KEF LS 50 Speakers rated 4-8 ohms
I am wondering if I can attach both pairs of speakers to my amps at the same time.
I really like both speakers for different reasons (they are similar but different)
but I would love to hear them both running side by side? as an experiment, but I do not want to damage my amp or speakers.
I understand its more complicated with differing impedance factors etc?
But I am not a technician so most of what I have read I do not really understand, If someone can please explain:
1. if its possible? (without causing any damage)
2. The correct connections from amp to speakers,
3. the technical aspects of this connection, in very simple terms.
Many thanks in advance for any advice offered.