There are a few spherical low cost speakers by Reckhorn from Germany that I find to be interesting for their low price point, style factor and seemingly decent constructive details.
The smallest model is the Reckhorn S-150. 6 inch sphere with a 3,5 inch full range driver costing only 22,95€:
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S-150 Kugellautsprecher 1 Stück Der S-150 ist der beste Breitbandlautsprecher mit einem Nettovolumen von 1 Liter für den Bereich…
reckhorn.com
The model above that (S-230) consists of a 9 inch sphere with a 5 inch coax costing 59€ as B goods (minor visual defects):
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Produktinformationen "B-Ware S-230 Lautsprecher mit 23 cm Bambuskugelgehäuse / 1 Stück" (A-Ware Stk. 79.- nicht…
reckhorn.com
The driver that is used in the S-230 seems to be of pretty decent quality (slotted membrane, die cast basket, ventilated spider, asymmetrical surround):
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There is an even bigger model (S-300) consisting of a 12 inch sphere with a 7,5 inch coax costing 149€ (but there are discounts for b-goods and customer returns), but it is less „plug and play“ since it is recommended for use with DSP crossovers:
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S-300 Kugellautsprecher mit patentiertem C-191mm Koaxialchassis / 1 Stück Der Traum vom Klang ohne störendes Lautsprechergefühl ist jetzt…
reckhorn.com