Answering question for Generator - Lodestar, Audio Frequency

Product:
Generator - Lodestar, Audio Frequency

Question:
Hi, I'm interested by this product. I want to produce various high frequencies at a high decibel level. So, is there an amplifier in this generator or should I buy a separate amplifier to connect the generator ? Could you recommend one amplifier ? And loudspeaker to go with ? Thank you in advance ! Best Regards, Nicolas Schenkel