UOTANG MK8600Pro 400W+400W HiFi Power Amplifier Class A and Class AB High Power Home Audio Amp

Features:
Two-State Dual-Mode HIFI Power Amplifier
* Two States: Pure Class A State/Class AB State
* Dual Modes: Pure Power Amp Mode/Integrated Amp Mode

Automatic Intelligent Switching of Operating States: Pure Class A/Class AB
* The MK8600Pro can fully automatically and intelligently switch between Pure Class A and Class AB operating states under different power usage conditions, keeping the MK8600Pro operating in an optimal sound state in real time.
* Under Pure Class A State: When operating at low power dynamics, the amplifier maintains a stable Pure Class A working state, delivering mellow, pleasant sound with rich, thick tone. It features high-fidelity sound full of tube warmth. It reproduces classical music, human vocals, musical instruments and solo pieces with exquisite clarity, presenting deep and solid bass, smooth mid-range and crisp treble with distinct audible layering.
* Under Class AB State: When high power and large dynamic output are required, the MK8600Pro automatically switches to Class AB operation. Its instantaneous output power surges to deliver ample energy for large dynamic passages. It offers stable low-frequency control, dramatically improved resolution and sound brightness, performing exceptionally well for large orchestral symphonies, drum sets and other music with grand dynamic ranges.

High Expandability with Dual Working Modes
Pure Power Amp Mode/Integrated Amp Mode
* The MK8600Pro can be used directly as an integrated amplifier, or switched to pure power amplifier mode to work with an independent preamplifier separately. It boasts excellent expandability, allowing flexible audio upgrades and unlocking more possibilities for sound tuning.
* MK8600Pro Integrated Amp Mode: It can be directly connected to audio source devices such as CD players and decoders. Audio signals go through the preamplifier section of the MK8600Pro for voltage amplification, sound coloring and volume adjustment, then enter the power amplifier section for power amplification.
* MK8600Pro Pure Power Amp Mode: It needs to be connected to an independent preamplifier, such as the UOTANG MK9100/MK9200 pure preamplifier. The standalone preamplifier receives and processes audio signals transmitted from source devices. At this time, the MK8600Pro switches to pure power amplifier state, with its own volume control disabled. Volume adjustment, sound coloring and voltage amplification are completed via the connected standalone preamplifier, after which the processed signal is sent to the MK8600Pro for power amplification to drive speakers.

Doubled Tube Warmth/Powerful Dynamic Performance
Tube-Sounding Op-Amp + Tube-Sounding MOSFET
* The MK8600Pro combines authentic tube tonal character with outstanding capability to handle large dynamic ranges, delivering satisfying performance in both tone and sound scale, achieving the best of both worlds.
* Preamplifier Stage: The preamplifier amplification circuit of MK8600Pro adopts the OPA2604 tube-sounding op-amp, widely recognized by audio enthusiasts. This op-amp generates even-order harmonics similar to vacuum tubes — the source of its signature tube warmth. While amplifying pre-stage signals, it infuses rich tube warmth into audio, creating an exceptionally smooth and pleasing sound that remains fatigue-free during long listening sessions.
* Power Amplifier Stage: The power amplification section of MK8600Pro uses MOSFETs for  IXYS manufactured in Germany. These transistors also produce even-order harmonics comparable to vacuum tubes for superior auditory experience. It features well-balanced energy distribution across bass, mid-range and treble, delivering dense sound with deep, powerful low-frequency response, vigorous energy and striking dynamics. It performs remarkably in sound layering and stereo imaging, with excellent capability to recreate spatial sound fields and reproduce fine musical details.
* The preamplifier and power amplifier stages together deliver dual tube warmth while retaining authentic dynamic response. This exclusive design of the MK8600Pro is the core highlight responsible for its captivating sound.

Ultra-High Power Reserve
Effortlessly Drive Even Large Speakers
* Power reserve refers to the core power output exceeding the rated power marked on the MK8600Pro. The definition and functions of power reserve are widely available online and will not be elaborated here.
* Its abundant power reserve lays a solid foundation for the MK8600Pro to drive speakers. Even when faced with extreme dynamic demands, the amplifier draws on its ample spare power to handle audio peaks with surplus capacity, forming a power redundancy system. This keeps the MK8600Pro running effortlessly and delivering a smooth, unstrained performance.
* Boasting generous power headroom, the MK8600Pro generates rich, full-bodied sound with powerful low-frequency energy. It rarely suffers from weak bass or insufficient driving force, allowing it to easily operate even large speaker cabinets.
* Three core components — the power transformer, filter energy storage capacitors, and power transistors — work in tandem to deliver the MK8600Pro's outstanding power reserve. The detailed breakdown is as follows.
* High Power Reserve ① MK8600Pro Power Transformer: Custom 680W all-copper epoxy resin encapsulated high-power transformer exclusively made for UOTANG products. It supplies sufficient power for energy storage of filter capacitors and acts as the source of the unit's ultra-high power reserve. The transformer features an independent sealed outer casing, a ring core wound precisely with pure copper of imported Grade A raw material, and internal vacuum impregnation treatment. These measures reduce vibration, suppress noise, and mitigate electromagnetic interference.
* High Power Reserve ②  MK8600Pro Capacitors: Equipped with 6 Japanese audio-grade capacitors for ELNA arranged in a dam-style matrix array for energy storage and filtering, delivering a total energy reserve of 60000uF. This supplies the MK8600Pro with abundant, clean electrical power. The matrix parallel capacitor design of the dam-style array greatly lowers internal resistance. Lower internal resistance enables faster discharge speeds, providing instantaneous power replenishment during large dynamic audio passages. While maintaining flexible power charging and discharging, the array retains powerful filtering performance, smoothing power supply ripples for a quiet audio background, and producing thick, continuous low-frequency output.
* High Power Reserve ③ MK8600Pro Power Transistors: The MK8600Pro fits a total of 16 German MOSFETs for IXYS across the left and right channels, with 8 transistors allocated to each channel. Every channel features a power reserve of approximately 2000W, resulting in an overall total power reserve of roughly 4000W. The unit delivers abundant energy and striking dynamic response, presenting excellent sound layering and stereo imaging. It boasts exceptional capability to reconstruct spatial sound fields and superbly reproduce fine musical audio details.

Stronger Stereo Imaging, Deeper Background Quietness
Independent Amplification for Left and Right Channels
* The left and right channels of the MK8600Pro adopt fully separated mirror-symmetric layout with independent driver stages, eliminating crosstalk between left and right channels. Each channel undergoes discrete amplification; the signal path stays fully separated all the way from audio input to rear output. This design avoids mutual interference between left and right channels, achieving ideal channel separation. It delivers powerful stereo perception, wide soundstage and an ultra-quiet audio background.

Treble & Bass Adjustment, Balance Control
Tune Your Exclusive Listening Experience
* The MK8600Pro supports independent adjustment of treble and bass. It is equipped with a dedicated op-amp tone control circuit and precision Japanese imported trim potentiometers for ALPS for treble and bass tuning, bringing minimized tonal coloration and higher sound fidelity. 
* Adjustable treble and bass cater to the diverse tonal preferences of audio enthusiasts. It counteracts unwanted acoustic reflections from untreated listening rooms, optimizes energy distribution across bass, mid-range and treble, and yields balanced, natural sound with enhanced clarity and listening comfort.
* The MK8600Pro also features left-right channel balance adjustment. Most listening spaces lack symmetrical room acoustics, speaker placement and centered listening positions, which necessitates balance tuning. It allows users to calibrate left-right acoustic balance according to their room layout and speaker arrangement, creating a more uniform soundstage and achieving refined channel balance through precise fine-tuning.

Clean Power Supply, Pristine Sound
Built-in UOTANG AC Power Purification Technology
* The MK8600Pro integrates proprietary UOTANG AC power purification and filtering technology, which effectively eliminates DC ripple noise from the 220V mains supply. This results in cleaner power input, more stable and quieter transformer operation, and purer audio output.
* Many household appliances including refrigerators, washing machines, microwave ovens, hair dryers and air conditioners generate DC ripple noise, which can severely disrupt the normal operation of power amplifiers. The MK8600Pro adds a dedicated DC purification circuit at the 220V power input, filtering out DC interference mixed in the mains power at the source.

Comprehensive and Abundant Input Terminals
* Integrated Amplifier Mode: 4 Sets of Dual RCA Inputs
* Pure Power Amplifier Mode: 1 Set of Dual RCA Input
* 1 Set of Speaker Output Binding Posts for Each Left and Right Channel

Every Detail Adds Extra Value
* Input Relay: The MK8600Pro adopts original Japanese EA2-5NU relays for input switching. Its contact resistance is negligible, pure mechanical switching brings minimal tonal coloration to sound, and it is precisely controlled by CPU programs without touching the audio signal path.
* Potentiometer: It utilizes precision trim potentiometers for ALPS, delivering superior channel matching between left and right channels, low sound coloration and high fidelity.
* Precision Component Matching for Dual Channels: Every single component of both channels undergoes strict measurement and matching via fully manual inspection. This procedure eliminates subtle left-right sound discrepancies caused by component tolerance. Though labor-intensive, this step is indispensable.
* Circuit Board: The printed circuit board of MK8600Pro is built with fiberglass epoxy substrate, which slows down oxidation, reduces solder joint resistance, enhances the resolving power of small signals and guarantees audio fidelity.

Specifications:
* Product Dimensions: 340mm Width x 145mm Height x 350mm Depth (Including Binding Posts)
* Max Power Output: 400W+400W (4Ω); 250W+250W (8Ω)
* Total Harmonic Distortion: 0.03% (4Ω Load), 0.01% (8Ω Load)
* Amplification Gain: Preamplifier Stage 5x, Power Amplifier Stage 36x
* Frequency Response:
   - Rated Continuous Average Output: 20-20kHz (+0, -0.1dB)
   - 1W Output Power: 10-100kHz (+1, -2dB)
* Damping Factor: 500
* Input Impedance: 27KΩ
* Treble Adjustment: ±10dB at 3kHz (20kHz)
* Bass Adjustment: ±10dB at 300Hz (50Hz)
* Load Impedance: 4—16Ω
* Signal-to-Noise Ratio: 118 db
* Power Supply Requirement: AC~220V 50/60Hz
* Power Consumption: 40—300W
* Net Weight: 14KG

Packing List:
* 1 x Power Amp

Packaging Details:
* Package weight: 16kg