From a Silent Key
| 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. With both HIGH 1 and LOW filters the passband width is from 400 to 3000 HzWith both HIGH 2 and LOW filters the passband width is from 400 to 1200 HzWith both HIGH 1, HIGH 2 and LOW filters the passband width is from 400 to 900 HzBy narrowing the bandwidth of the audio stage, the noise component of the signal can be reduced. This speaker also has a standard 1/4 inch headphone jack on the front panel of the speaker and a Line Output Jack on the back panel (to feed a recorder, RTTY unit, etc.). These convenient output jacks are post filtration. The input posts are spring-loaded terminals. An audio cable (bare wire to plug) is provided. This speaker filter is 7.2 x 4.7 x 12.3 inches 4.4 lbs. (180x120x310mm 2kg). The front panel may elevated by the extending the front feet with supplied feet extenders. I’ve seen these range from £142 to £ a mental £280. I think £100 is a fair price. There is no original box but if you want it shipped, I can do that for £12 All money going to the family of the silent key email mm0dxc@aol.com |
