Fosi Audio V3 Mono Stereo Power Amplifier 2/2.1/3/4/5 Channel TPA3255 Mni Amp 240W Professional Amplifier for Home Theater

Feature：

·Mini Monoblock Power Amplifier: It is the first monoblock desktop amplifier to support PFFB technology in Fosi Audio. This innovative design allows audiophiles to easily DIY their home audio systems with multiple V3 Mono amplifiers, supporting configurations from single-channel to 2/2.1/3/4/5 channel setups. With a maximum power output of 240W, the V3 Mono excels in delivering robust and precise amplification for each speaker.

·Two Input Modes for Enhanced Flexibility: V3 mono features both RCA and balanced inputs, accommodating XLR and 6.35mm TRS interfaces. Additionally, the RCA inputs feature two gain settings: 19dB and 25dB, allowing you to tailor the input sensitivity to suit different audio sources. A toggle switch on the front panel makes it easier to switch between input modes.

·Premium Audiophile Components: The V3 mono guarantees superior audio performance with its high-end TPA3255 Class-D amplifier chip and audiophile-grade components, such as Japanese NICHICON and ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors. With a SINAD rating of up to 93dB at RCA and 101dB at XLR, an SNR of up to 123dB, and a low noise floor of only 31μV, it delivers pristine audio with minimal distortion.

·A Detail-oriented Audio Amplifier: The V3 mono amp features an auto turn ON/OFF function for user convenience and efficient energy management. Its advanced heat dissipation design ensures optimal performance and longevity. The amp supports a power range of DC 32-48V and comes with a 48V/5A power supply. When using a 48V/10A power supply can simultaneously drive two V3 MONO units, to expand your HIFI system.

·Swappable Op-Amp Design: Allowing you to customize your audio experience, easily replace the DIP8 op-amp chips with your choices, such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, and LME49720HA, etc. This flexibility enables you to tailor the sound signature to their personal preferences, unlocking a unique and personalized audio journey.

Specifications:

·Channel: 1.0

·Amplifier Chip：Texas Instruments TPA3255

·Input：RCA/XLR,/¼" TRS

·Output：Speaker Output (supports banana plug or bare wire connection)

·SINAD：
XLR: 101dB
RCA: 93dB

·SNR:≥123dB

·Dynamic Range:≥123dB

·THD:＜0.006%

·Gain:XLR/¼"TRS: 20dB/ RCA: 19dB, 25dB;

·Terminal Impedance: 2-8Ω

·Rated Power Output: 48V/5A: 240W@4Ω/ 32V/5A: 100W@4Ω

·Frequency Response: 10Hz-30kHz（±0.06dB）

·Input Voltage Range: DC 32-48V

Q1.The V3MONO runs hot and feels scorching to the touch. Is it safe?

V3 Mono employs a unique cooling design. We closely integrate the amplifier chip's heatsink with the chassis, effectively turning the entire chassis into a radiator. Additionally, we have included vent holes on the sides of the chassis to enhance air circulation. Since the chassis serves as a radiator, its surface temperature may seem a bit high. However, this indicates that the heat from the amplifier chip is being effectively transferred to the chassis, allowing the V3 Mono to stably maintain high power output continuously. We have also conducted extensive safety testing on the V3 Mono to ensure it poses no safety risk, so please rest assured.

You can use a cooling fan to help cool it down if needed.

Q2:When two V3 MONO units are connected to a filter, why does the other unit emit a humming sound when one is turned off?

This is normal. If you wish to resolve this issue, you need to configure a separate filter for each V3 MONO.