Showing 1 review for Alpine KTP-445

Customer Review Summary for Alpine KTP-445
Average Customer Rating is 4.6 out of 5 stars:
4.6
based on 16 Reviews
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Rating Distribution:
5 star:
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69%
4 star:
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25%
3 star:
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6%
2 star:
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0%
1 star:
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0%
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Average Attributes Rating:
Durability
4.6
Value
4.4
Features
4.0
Design
4.3
Usability
4.7
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February 17, 2012 It Is Normal for You Not To Hear a Volume Increase
Review by
Michael from Jeffersonville, IN
Overall
Durability
Value
Features
Design
Usability
First of all, the reason for having this amp is not to hear a volume increase it is to protect your speakers from the possibility of destruction. Generally the radio's built in amplifier is about 18W RMS. To get a just noticible increase in sound volume to the human ear you have to DOUBLE that amount of power. So 18 x2= 36W RMS. To get the next just noticable increase you have to double the power again (36 x 2= 72W RMS) and so on. Each doubling of power is a 3dB increase. The radio volume should NEVER be turned up past 11 0'clock position because distortion is introduced (Clipping of the sine wave peaks). This clipping results in DC applied to the speaker coil and could easily fry it even for short periods of time. The additional booster amp like this one just allows you a bit of "amplifier headroom" so you will not clip the sine wave and thus protect your speaker investment.
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