Yes, I know it's ugly but at one time speakers like this was all the rage. These speakers were built at a time when the AM broadcast band was the major source of information for most folks. Families would sit around the radio while dad or granddad operated the controls. One is left to wonder what exciting stories and world events boomed through in the example above. Could it have been Amos & Andy or Charlie Chan or Hopalong Cassidy maybe even Flash Gordon.

These next two speakers are unidentified as of yet. The one on the left was purchased with an Eveready model 3 broadcast band receiver. The one on the right was given to me by a local ham(KB4AKF).

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.

To see the internal componentss as well as more photographs of this speaker please CLICK HERE.   

The photograph on the left is a picture of the Am-Com ClearSpeech Speaker model CSS-1 .

This is a speaker that incorporates audio digital signal processing(DSP) and is designed to remove static, steady tone noise such as carriers, and other interference. The ClearSpeech Speaker is a digital speaker that removes up to 95% of the background noise from the receive side of any two-way radio communication for greater intelligibility of the incoming conversation. The speaker has an on off switch and requires a 12 volt power source. If you do a lot of HF work while mobile then this speaker may be just what the doctor ordered.

The photograph on the right is a picture of the Icom SP-20 speaker which is designed for use with a wide variety of communication equipment. The SP-20 is equipped with four separate audio network filters for maximum control of the audio characteristics of received signals. The SP-20 rear panel features two audio input jacks (3.5 mm mini jack). Input A or B may be selected from a switch on the front of the speaker. There is also a Speaker On/Off switch and a 1/4 inch headphone jack on the front panel. 

The internal speaker Size is 5 inches(12 cm) and the rated input power is 3 watts. The impedance of the speaker is 8 ohms and the maximum rated power is 5 watts. It has a frequency response of 100Hz to 9000Hz. The filters on this item have the following cut-off frequencies,

* High Pass filter 1 300 Hz 

* High pass filter 2 600 Hz 

* Low pass filter 1 2400 Hz 

* Low pass filter 2 800 Hz 

The filter response is an impressive -6dB octave.