The Down4Sound JP234 is a full-range Class D four-channel car amplifier rated at 234W per channel at 4 ohms and 334W per channel at 2 ohms, with bridged output around 640-740W into two channels. It runs a high-speed MOSFET power supply, variable high-pass and low-pass filters with a x10 crossover multiplier, and band-pass capability, so it can drive tweeters, midrange drivers or component sets without extra processors. It is stable at 2 ohms stereo and 4 ohms bridged, which gives it more flexible load options than many budget four-channels. Owners rate it highly for output and value against name-brand four-channels with similar power.
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Owners rate the JP234 very highly, praising its real-world output, clean sound and value against bigger-name four-channels. Complaints are few and mostly about installation demands rather than sound.
It uses a high-speed MOSFET power supply and is stable into 2 ohms in stereo or 4 ohms bridged.
It has a variable high-pass filter and a variable low-pass filter, and it can be used as a band-pass filter. A crossover multiply x10 setting is included. Four protection circuits guard the amplifier.
Power is rated at worst-case conditions at 14.4V. The amplifier operates on 9 to 16 volts.
