Features
It is a two-frequency column speaker consisting of four 4.5-inch woofers and a 25-core neodymium magnetic tweeter. The unit uses high-quality raw materials, which can restore the true amplification characteristics of human voice and music, and the timbre is clear. The precise longitudinal unit arrangement only generates plane waves, basically has no upward and downward diffusion, and does not generate multiple attenuation. So that the sound can be transmitted farther. With stronger sound energy radiation, it can easily achieve a uniform sound field.
Technical parameters
|
Model |
SD-445S |
SD-645S |
|
Frequency response |
65Hz-20KHz |
65Hz-20KHz |
|
Sensitivity |
98dB (1W/1m) |
98dB (1W/1m) |
|
Nominal impedance |
4Ω |
8Ω |
|
Rated power |
250 W RMS |
400 W RMS |
|
Maximum power |
1000W peak |
1600W peak |
|
Bass unit |
4×4.5＂(115mm) |
6×4.5＂(115mm) |
|
Tweeter |
1×1＂(25mm) |
2×1＂(25mm) |
|
Angle of diffusion |
90°×50° |
90°×50° |
|
Max SPL |
122dB, 128dB peak |
124dB, 130dB peak |
|
Connect the socket |
2×NL4 |
2× NL4 |
|
Net weight |
9.5kg |
15kg |
|
Dimensions (W × D × H) |
140mm×180mm×606mm |
140mm×180mm×933mm |
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