Built-In Low-Cut/High-Cut Filters; Speaker Input Select Switch - Kenwood TS-990S In-Depth Manual

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10 SP-990

Built‑in Low‑cut/High‑cut Filters

The built‑in low‑cut and high‑cut filters, which were well reputed on the SP‑950, are designed with optimized values for

the full‑range speaker. The high‑pass and low‑pass filters are adjustable in three steps for the best filtering by mode,

such as SSB or CW operation. The adjustable filters serve to be applied to various operations.

The charts below show the frequency characteristics. High cut‑off frequencies can be decreased in the sequence

of HIGH 1, HIGH 2, and HIGH 1 + HIGH 2 (HIGH 1 + HIGH 2 means that both the [HIGH 1] and [HIGH 2] keys are

pressed and held). Low cut‑off frequencies can be increased in the sequence of LOW 1, LOW 2, and LOW 1 + LOW 2

(LOW 1 + LOW 2 means that both the [LOW 1] and [LOW 2] keys are pressed and held).

The speaker has two speaker input terminals: A and B. If two transceivers are connected to the speaker, the sound

source can be toggled on the front panel. This also applies to connecting a set of headphones. The speaker also has a

line out terminal for filtered audio signal output and a mute function to temporarily stop audio output.

102

Fig. 19 Filter Switch (on the Front Panel)

Fig. 20 Characteristics of the High‑Cut Filters and Low‑Cut Filters

Fig. 21 Input Select Switch (A/B) (on the Front Panel)

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