Studio Monitors & Speakers
Precision Devices RC.PD.1851/2 Recone-Kit
Precision Devices RC.PD.1851/2 Recone-Kit, Recone Kit, Suitable for PD.1851/2 (article nr #247268# - not included) and PD.1851 (old basket version), Impedance: 8 Ohm
https://www.bizrate.co.uk/musicalinstrumentmonitors_speakers/precision-devices-rc-pd-1851-2-recone-kit-oid5521571684.html