《Condition》
**Used**
An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.
【Dual Mode Innovation】This new generation mini amplifier offers both stereo and mono modes, flexibly adapting to diverse needs and enabling seamless mode switching. In stereo mode, it delivers a robust output of up to 180W, while in mono mode, it increases to a maximum of 235W. Pairing two ZA3 units in a mono configuration creates a powerful audio system, significantly enhancing the listening experience.
【Enhanced Connectivity】The ZA3 audio amplifier features balanced and trigger inputs, and includes a balanced combo audio signal input connector that supports both XLR and 1/4-inch TRS plugs. This design minimizes interference and reduces the noise floor. The 12V trigger input connector enables synchronization, allowing you to work with other devices and streamline the power on/off process without individual operation.
【High-Quality Components】The ZA3 features the TPA3255 high-end Class-D amplifier chip and utilizes premium Japanese NCC and ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors to achieve exceptional audio quality. With a maximum SNR of 106dB and a low noise floor of just 150μV, it delivers outstanding clarity and low distortion.
【Innovative Heat Dissipation Design】Based on the groundbreaking heat dissipation design of the V3, the ZA3's cooling system has been upgraded by enlarging the chassis, moving the vents to the sides, adding a dust cover to improve airflow, and achieving sustained and stable high output.
【Scalable Fun】Customize your audio experience with op-amp rolling functionality! The ZA3 features five interchangeable op-amps for left and right channel outputs, balanced inputs, and subwoofer output. Try compatible DIP8 dual op-amps such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, and LME49720HA to fine-tune your sound to perfection.
Note: 1) The power switch for this product is located on the total volume knob. Press and hold the total volume knob for 2 seconds to turn it on. 2) When connecting, make sure the cable plug matches the interface and that the plug is inserted into the designated position. Check and replace any cables that may be damaged. 3) Before using this product, make sure the speaker's power matches that of this product. 4) When using, you can reduce signal interference by turning off the Bluetooth function of other Bluetooth devices. 5) Check that the audio source is outputting correctly and that the speaker is working properly.
*Why do small sparks occur when wiring? This is a normal phenomenon. The reasons for this phenomenon are as follows: ① Change in current: When the power amplifier is operating, a constant current passes through its output terminal. When a speaker is connected to the output port of the power amplifier, the circuit changes from an open circuit to a closed circuit. The current rises rapidly from zero to a stable value. This rapid change in current generates a momentary high voltage, causing a spark. ② Discharge of capacitors: Normally, there are energy storage components inside the power amplifier, such as filter capacitors, and even after the power amplifier is turned off, a certain amount of charge may be stored in these capacitors. When a speaker is connected, the capacitors discharge through the speaker, forming a momentary current pulse, which causes a spark.
Is it possible to adjust the treble and bass in RCA/XLR output mode? No, it is not supported. Treble and bass adjustment is only supported in headphone output mode (PO). This is because it is assumed that users who want to add bass when using speakers will typically connect a dedicated subwoofer. Furthermore, adding treble and bass adjustment functionality may slightly increase noise, so this function is not included in the RCA/XLR output.
[※] For better heat dissipation, we recommend using a Fosi Audio cooling fan with the amplifier.
• Inputs: RCA, XLR, ¼” TRS; Outputs: Stereo, Mono • SNR ≥ 106dB; THD
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