All-in-One Desktop HiFi DAC/Headphone Amp/Preamp With comprehensive input and output options, the ZH3 functions as a DAC, headphone amplifier, and preamp, which can be connected to IEMs, over-ear headphones, active speakers, and amplifiers. Featuring UAC 1.0 and 2.0, it is also compatible with gaming consoles, ensuring seamless connectivity across multiple desktop devices. XMOS+AKM decoding with 4 high-performance dual op-amps deliver clarity, precision, and transparency. With 1.9μV noise floor and 117dB crosstalk for clearer separation of vocals and instruments. Delivering up to 2570mW per channel into 32 ohms(4.4 mm), far overkill for mainstream headphones. Delivers strong control to handle both IEMs and over-ear headphones from 16Ω to 300Ω with ease. Cohesive family aesthetics, pairing effortlessly with ZD3 and ZA3 for a matching HiFi ensemble. When switching outputs, it adjusts to previous level for safe transitions between different devices. Responsive LCD with all panel controls integrated for clear information and a minimalist look. Provides ±12dB bass adjustment and ±10dB treble adjustment to create your own personalized tuning. Enjoy a very clean, noise-free listening experience by bypassing the tone control circuit. Enjoy a very clean, noise-free listening experience by bypassing the tone control circuit. Auto power off after 30 minutes of no signal, for energy savings and peace of mind. Enables synchronized on/off with audio setups, automating seamless system control. 1. When do I need to install a driver for ZH3 on Windows? If your PC is running Windows 7 or earlier. (Note: Windows 7 is no longer updated and may have compatibility issues. Using ZH3 with Windows 7 is not recommended.); To play DSD tracks. (Note: If you use Foobar with the built-in WASAPI plugin for DSD playback, no driver is needed.); To play PCM 768kHz tracks. 2. USB not recognized? Faulty or loose USB connection—try a different USB cable; Computer malfunction—try connecting to another computer; Malfunctioning USB port—try another USB port; ZH3 is not set to USB input mode; Driver conflict—go to "Device Manager," find "Audio Inputs and Outputs," uninstall the ZH3 driver, reinstall it, reboot your computer, then reconnect the ZH3 via USB. 3. If a submenu item appears grayed out, it means the function is not available in the current input/output mode? USB Input--AUX or LO output: EQ, Bypass, and Gain adjustment not supported; Optical/Coaxial Input--PO output: UAC switching not supported; Optical/Coaxial Input--AUX or LO output: EQ, Bypass, Gain, and UAC switching not supported; RCA Input--PO output: UAC switching and Filter not supported; RCA Input--AUX or LO output: Only input and output selection available. 4. Can I replace the op-amps in the ZH3? The ZH3 supports the replacement of two op-amp chips. It utilises easily replaceable DIP8 dual-channel discrete op-amps, catering to your pursuit of a personalised audio experience. Compatible models include the LME49720, NE5532, MUSES02, SS3602, and others. 5. Is it possible to adjust the bass and treble in RCA/XLR output mode? No, it is not supported. Only the headphone output mode, namely PO, supports bass and treble adjustment. Considering that if users need extra bass when using speakers, they usually connect a dedicated subwoofer; and secondly, adding bass and treble functions would slightly increase the noise floor, we have not added this function to the RCA/XLR output. ZD3 Desktop DAC Preamp ZH3 DAC Headphone Amp/Preamp ZA3 Balanced Stereo Amplifier Input USB+HDMI (ARC)+Coaxial+Optical+Bluetooth Input Coaxial+Optical+USB-C+RCA Input RCA+XLR+¼”TRS Output XLR + RCA Output 6.35mm Single-Ended+4.4mm Balanced+RCA+XLR Output Passive SPK +Sub-out THD+N <0.00008% THD+N ≤ 0.00018% THD <0.006% SNR ≥126dB SNR ≥ 121dB SNR ≥106dB Amplifying Your Voice, Shaping Our Innovation Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide. Visit the Store Visit the Store TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2