Ampapa H1 Headphone Amplifier 4000mW Class ECC83 Tube Gain Preamplifier A Balanced/Single 3-Stage 4.4/XLR

Overwhelming 4000mW of driving power thanks to a discrete Class A output stage — At the heart of this unit is a discrete (individually configured) Class A output stage. It achieves a maximum output of 4000mW (32Ω) in balanced output (High Gain), exceeding the limits of desktop amplifiers. With a total harmonic distortion of less than 0.04% and an S/N ratio of over 116dB, it maintains clean signal transmission despite its high output. It powerfully and delicately drives headphones with a wide impedance range from 16Ω to 600Ω. Three output systems—4.4mm balanced, 4-pin XLR balanced, and 6.35mm single-ended—allow compatibility with a variety of headphones. The warm tone spun by PSVANE x Douk Audio's custom ECC83 vacuum tubes — The amplification stage features custom ECC83 vacuum tubes created through a collaboration between PSVANE and Douk Audio. Unlike amplification using typical op-amps, it adds the warmth and rich harmonics unique to vacuum tubes to both the headphone output and preamp output. The emotion of vocals, the resonance of string instruments, and the atmosphere of jazz are significantly enriched, and the harsh impression often associated with digital sound sources is softened. The vacuum tubes can be replaced with compatible tubes such as 12AX7, 7205, 6N4, and 5751, allowing you to enjoy "tube rolling" to pursue your preferred tone. Flexible system configuration with 3-stage gain switching and diverse output modes — This unit features 3-stage gain switching: Low/Mid/High. Low gain is ideal for high-sensitivity IEMs and low-impedance headphones, Mid gain is for everyday listening, and High gain is perfect for high-impedance or difficult-to-drive headphones. Three output modes are available: HP (headphones only), Line (pre-out only), and HP+Line (simultaneous output). This allows for flexible use not only as a headphone amplifier but also as a preamplifier for the entire system. High-quality internal components and precise circuit design — a Japanese-made NJW1195 volume control IC is for volume adjustment. The balance between the left and right channels is extremely stable, and the sound image does not waver even at very low volume levels. The op-amp is a socketed LME49720, which can be replaced with standard DIP-8 dual op-amps such as OPA2604, OPA2134, and MUSES02. Furthermore, low-noise relays and shielding of the vacuum tube power supply reduce external interference and ensure a clean signal path. The all-aluminum CNC casing combines robustness and heat dissipation. Abundant input/output terminals and 12V trigger linkage function — Equipped with a total of three inputs: two RCA and one TRS. Connect a DAC, CD player, streamer, etc. simultaneously and instantly switch sources with the input switch on the front panel. Outputs include two RCA and one TRS pre-out, as well as a headphone output (4.4mm/4-pin XLR/6.35mm). Furthermore, the 12V trigger linkage function allows you to synchronize the power on/off with compatible devices. The 1.5-inch OLED display clearly shows the current input mode, gain setting, volume, etc. Introduction: Unleashing the full potential of your headphones—the Ampapa H1 is a desktop headphone amplifier equipped with a discrete Class A output stage. It delivers an overwhelming power of up to 4000mW (32Ω) in balanced output mode, effortlessly controlling a wide range of headphones from 16Ω to 600Ω. It also boasts excellent preamplifier performance, featuring RCA and TRS analog inputs and outputs for exceptional system expandability. The amplification stage utilizes custom ECC83 vacuum tubes, a collaboration between PSVANE and Douk Audio, resulting in a warm and rich tone for both headphone and preamplifier outputs. Three-stage gain switching (Low/Mid/High) allows for optimal playback of everything from highly sensitive earphones to high-impedance headphones that are difficult to drive. A 1.5-inch OLED display allows for at-a-glance monitoring of the operating status, and it also features a 12V trigger function. With its CNC aluminum casing and carefully selected internal components, this is a unit designed for audiophiles, meticulously pursuing both sound quality and durability.