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RADIOHF - FS: Kenwood SP-31 with PHITS kit upgrade I have for sale a Kenwood SP-31 with the upgraded speaker and PHITs sound enhancements. Comes with original box. Price is $150 Payment via zelle, money order, or check. ************************** The Kenwood SP-31 is a high quality external speaker with audio filtration. It is 8 ohms, can handle up to 2 watts and has a normal frequency response of 160 Hz to 7 kHz. This speaker may be used with virtually any communications receiver or transceiver. The SP-31 features a 4 inch (10 cm) speaker in a metal enclosure. The switch in the upper the right corner can select from two audio input sources. The three switches on the lower right activate two high (HIGH 1, HIGH 2) cut and one low (LOW) cut audio filters. This allows you to tailor the frequency response of the speaker system. Listing #1753147 by K2ZZ Submitted on 12/19/25 Submitted from IP 104.28.204.175 Click to Contact Back to Previous Page

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