Hello Friends,
I just purchase 5.1 Amp kit (5 TDA2030 + Stk4392 in bridge mode for subwoofer )
& 5.1 Decoder board
I notice that 5 channel sound was ok but subwoofer sound is distorted even in mimimum volume
On 2 channel mode and 5.1 mode also
I also replace subwoofer speakers.
Any clue ?
Waiting for your solutions
I just purchase 5.1 Amp kit (5 TDA2030 + Stk4392 in bridge mode for subwoofer )
& 5.1 Decoder board
I notice that 5 channel sound was ok but subwoofer sound is distorted even in mimimum volume
On 2 channel mode and 5.1 mode also
I also replace subwoofer speakers.
Any clue ?
Waiting for your solutions
Hello Friends,
I just purchase 5.1 Amp kit (5 TDA2030 + Stk4392 in bridge mode for subwoofer )
& 5.1 Decoder board
I notice that 5 channel sound was ok but subwoofer sound is distorted even in mimimum volume
On 2 channel mode and 5.1 mode also
I also replace subwoofer speakers.
Any clue ?
Waiting for your solutions
What is the supply voltage you use?
What is the impedance of your sub-woofer?
The datasheet for STK4392 is very sparse but indicates a chip that only drives 8 Ohm well and to a limited power level (15W) in which case it is hardly suited for bridging. The sub-woofer channel is the one delivering most power with modern music.
Is that +/-28 Vdc, or just +28 Vdc (in which case the question would be whether the circuit is single supply capable)? In any case, inspect the soldering job, the STK may be lacking a supply rail.Power supply is 28 Volts DC
Using one of these STKs in a modern-day kit is a weird choice, these are old parts. Worst case, these may be salvaged from scrapped electronics or inferior quality modern-day reproductions, and could be dead as received.
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