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Fosi Audio Stereo Power Amplifier 300W x2 TPA3255 Class D Mini Speaker Amp 2 Channel Audio Amplifier for Passive Bookshelf

Fosi Audio Stereo Power Amplifier 300W x2 TPA3255 Class D Mini Speaker Amp 2 Channel Audio Amplifier for Passive Bookshelf

$229.99 USD
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SPECIFICATIONS

Brand Name: Fosi Audio

Certification: CE

Channels: 2 (2.0)

Dynamic Range: ≥110dB

Feature: audio amplifier

Highlight: Home Theater Amplifier

Hign-concerned Chemical: None

Input: RCA

Input Voltage Range: DC 24V~48V

MAX Power Output: 300w x2

Maximum Power Per Channel: Above 200W

Model Number: V3

Origin: Mainland China

Output: Speaker Output+3.5mm Pre-out

Output Power: Max 300W x2@4Ω

Package: Yes

Power Amplifier Chip: TI TPA3255

SINAD: 88dB

SNR: ≥110dB

THD: <0.003%

Terminal Impedance: 2~8Ω

Type: Stereo Audio amplifier

feature: HIFI amplifier


Fosi Audio V3 Stereo Power Amplifier 300W x2 TPA3255 Class D Mini Speaker Amp 2 Channel Audio Amplifier for Passive Bookshelf
 

Notice: If you choose to ship from the Brazil warehouse, Aliexpress currently does not offer the option of collecting and paying ICMS fees on behalf of the buyer. If it is found later by the tax authorities that ICMS fees need to be paid, the buyer is responsible for paying them, and the seller will not bear the responsibility. if you mind to pay 18% of the ICMS fee, please choose to ship from China, thank you for your understanding!



Highlight:
 

1. Replaceable Op-Amp Chips: MUSES02, OPA2134PA, OPA2604AP

2. Passive Speakers + Pre-out   

3. Replaceable Knobs: ORANGE KNOB

Note: The "Pre-out" level is NOT controlled by the volume control as the V3 is not an integrated amplifier, so the sound is NOT adjustable when you are connected to the "Pre-out".



Specifications:

  • Max Power Output: 300Wx2 @4Ω

  • SINAD: 88dB

  • SNR: ≥110dB

  • Terminating Impedance: 2-8Ω

  • THD: 0.001%

  • Power Amp Chip: TI TPA3255

  • Op-Amp: TI NE5532 x2

  • Power Supply: 32V/5A, 48V/5A

  • Input Range: DC 24V-48V

  • Frequency Response Range: 20Hz-20kHz(±1.2dB)




FAQ
 

Q: The screws on the bottom are so tight it is impossible to remove with a normal hex wrench.Any tips how to get them loose？

A:The H2.0mm Allen Wrenchis able to loosen it.

https://www.youtube.com/watch?v=feH5_22hQCA 07:43 Rolling Op-Amps
 
Q: Low volume on new V3
A: Please ensure that you set the volume level of your audio source to 50% or higher, and adjust the V3 amplifier's volume to maximum. The V3 amplifier is equipped with a built-in logarithmic taper A Pot, which means the volume control becomes more responsive at higher levels (see the below diagram). If you encounter low volume issues, you can also consider using a preamp to address this.
 
Q: How can I connect an active subwoofer and control the volume if it s constant output?
A: Connect a single 3.5mm cable from the preout to the audio input port on the active subwoofer. You can refer to the tutorial video at this link: https://youtu.be/WhYpHkovCWs (go to 2:44 for the PRE OUT demonstration).
The "pre-out" is a fixed output, you could control the volume by the input device connected to the V3.
 
Q: I was just wondering what the differences were by using the different op amps?
A: Different op-amps can produce varying sound qualities. You can refer to this video showing different dual op-amps for comparison:https://www.youtube.com/watch?v=nrqVYE4_v1M
You can consider replacing it with op-amps like the SS3602, MUSES02, available on our official website, or options like ORACLE II-02 and LME49720, for different sound.
 
Q: I intend to use the V3 as a power amp and control the volume with the preamplifier.  Is the volume on the V3 a passive attenuator or an active gain circuit?
AThe volume on the V3 is an active gain circuit, you can set the V3 amp at the 3:00 position, then turn up the preamp controls to your comfortable listening level.





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