This Kenwood SP-230 is an external speaker which matches up very nicely to many of the Kenwood series of radios such as the TS-530 and TS-820 featured else where on this website. The frequency response of this speaker is from 100Hz to 5kHz. The internal speaker has an impedance of 8 ohms and a maximum input of 2 watts.
Another feature that makes this speaker so appealing is that it offers filtration in 3 different filter settings. The cut off frequency response is as follows, in the low setting it is 400 Hz, in the High 1 position it is 3 kHz, in the High 2 it is 1.5 kHz and when the High 1 + High 2 settings are selected it is 1 kHz.
There is also an A/B switch on the front which will allow the operator to select between different inputs such as using this speaker with two different radios. Another nice feature of this speaker is that it offers a 1/4" headphone plug right on the front for quick and easy access. As well a 1/4" headphone plug on the rear but when the rear one is used the SP-230 speaker is not muted.
This speaker measures in at 7 1/16" wide by 5 1/4" high by 11 5/16" deep and weighs in at 4.0 pounds.
When these speakers are shipped, they are supplied with extender feet to match those of the Kenwood radios. In the picture on the left I have set up a side by side comparison of the SP-230. The SP-230 on the right has the extender feet installed while the one on the left does not.
The photograph on the right is of the back of the SP-230.