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I bought them with two 32V 5A adapters from aliexpress.com because two is one, and one is none. A chinese 32V 5A adapter costs about 17~18 USD. The total cost was about 120 USD.
Either amplifier works perfectly with a 32V 5A adapter.
If you are low on money, both amplifiers are useable and serviceable until you gather enough money to upgrade.
For an upgrade, I'm thinking about allo.com's upcoming TPA3255 amplifier which is rumored to be released in the beginning of 2020.
Either amplifier works perfectly with a 32V 5A adapter.
- Chinese generic TPA3251 amplifier // ~39 USD
- It has a cheap potentiometer that exhibits channel imbalance below 8'o clock.
- You just need to remember to keep the volume above 8'o clock. If you need quieter volume levels, decrease DAC volume or software volume.
- Other than channel imbalance at low volume levels, it doesn't have much white noise.
- White noise is not audible beyond 7cm with environmental noise.
- Because the main capacitor is a 35V one, it may not last very long.
- It has a cheap potentiometer that exhibits channel imbalance below 8'o clock.
- Chinese generic TPA3255 amplifier // ~45 USD
- It has a better potentiometer that exhibits channel imbalance at very low volume levels
- It has substantially more white noise in the right side, but it becomes virtually inaudible at about 15cm away with ambient noise.
- When I disassembled the amplifier, I accidentally severed the connection between bluetooth antenna and bluetooth chipset which resides on the right side of the amp.
- Perhaps, that's why there's more white noise in the right side? The generic TPA3251 amp has no bluetooth functionality.
- Although it has more white noise in the right side, because it has less channel imbalance, it is more useable than my TPA3251 amp.
- White noise from either speaker is still inaudible at my listening position(~60cm away).
- It has a 50V capacitor, so it may last longer than the generic TPA3251 amplifier.
If you are low on money, both amplifiers are useable and serviceable until you gather enough money to upgrade.
For an upgrade, I'm thinking about allo.com's upcoming TPA3255 amplifier which is rumored to be released in the beginning of 2020.
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