Here's a good review for Enleum Amp-23R if anyone interested
https://headphone.guru/the-enleum-amp-23r-headphone-speaker-amplifier-the-best-of-both-worlds/
Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure
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Parameters (from Cube Audio):
Power: 40 W
Efficiency: 92 dB
Frequency response: 30Hz - 18kHz ( 6db)*
Dimensions: 30 x 50 x 105 cm
Weight: 40 Kg