FAQ
Q1:What vacuum tubes are utilized in the A300B's amplification stages?
The A300B utilizes a premium multi-stage tube configuration. It features two 300B tubes for the power stage and a 5AR4 rectifier tube for power delivery. The voltage amplification stage employs 6N11 and 6N6 tubes, ensuring efficient signal gain and exceptional dynamic headroom.
Q2:What are the rated output power and circuit design of the 300B?
The amplifier utilizes a pure Single-Ended Class A architecture. It delivers a steady 8W + 8W of power output, providing a warm, distortion-free audio experience that is highly optimized for efficient loudspeakers.
Q3:Can the Oilily A300B drive high-impedance audiophile headphones?
Yes. The amplifier is equipped with a dedicated intelligent headphone interface. It supports a wide headphone output impedance range from 8Ω up to 300Ω, delivering tube-driven fidelity for personal listening without compromising sound quality.
Q4:What speaker impedance options does the 300B support?
The custom transformer system offers multiple impedance matching options. It includes dedicated speaker output taps for 4Ω, 8Ω, and 16Ω, while maintaining an input impedance of 100kΩ, ensuring optimal synergy with diverse speaker loads.
Q5:Does the 300B amplifier have a built-in DAC or digital inputs?
No. The Oilily A300B is designed as a pure analog integrated amplifier. It contains absolutely no digital components inside, operating via a single source input to preserve the maximum purity of the analog signal path (ideal for vinyl setups).
Q6:How does the Oilily compare to traditional 300B amplifiers in terms of bass performance?
Unlike conventional 300B designs that may exhibit “sloppy” low ends, the A300B delivers deep, well-controlled bass. It offers a precise mix of tightness and extension, accurately fleshing out low-frequency dynamics.
Q7:What characterizes the soundstage of the Oilily A300B?
Reviewers consistently highlight its “holographic soundstage.” The sonic presentation is wide, tall, and notably deep, offering brilliant instrument separation and layering without blending complex musical passages.
Q8:How does the user monitor the amplifier's operating status?
The front panel features an intuitive dual meter display. This allows users to monitor both the audio level and operating voltage in real-time with absolute clarity.
Q9:Are Oilily300B connectors designed for high-end audio?
Yes, the rear panel utilizes pure copper terminals. This premium material ensures minimal signal degradation and high-quality audio transmission to the speaker cables.
Q10:Does the Oilily 300B amplifier produce the typical “hum” associated with tube amplifiers?
The A300B is engineered for exceptionally quiet operation. Thanks to its heavy-duty build (approx. 30 lbs) and careful circuit layout, it maintains minimal hum even when driven at high volume levels.
Q1: What is the vacuum tube configuration of the Oilily A88?
The A88 utilizes a high-quality multi-tube layout. The preamplifier stage is equipped with 6SL7 and 6SN7 tubes, while the power stage employs four KT88 (or EL34) vacuum tubes for robust audio amplification.
Q2:What is the rated output power and amplifier class of the A88?
It operates as a Class AB amplifier. Depending on the selected mode, it delivers a powerful output of 45W + 45W (in Ultra-Linear mode), or a lower output of 14W per channel when operating in Triode mode.
Q3: Does the A88 offer selectable sound modes?
Yes, it features Dual Mode Sound Control. Users can seamlessly switch between Triode Mode for a warmer, more detailed sound, and Ultra-Linear Mode for maximum power output and dynamic headroom.
Q4:How is the internal circuitry of the A88 constructed?
The amplifier features an all-vacuum tube design with handcrafted point-to-point soldering. This traditional construction method minimizes signal path interference and provides audiophiles with unparalleled musical clarity.
Q5:What are the physical dimensions and weight of the A88?
The A88 is built with a sturdy blue-black chassis. It measures 441 × 300 × 300mm and weighs a substantial 36kg, reflecting its heavy-duty transformers and robust build quality.
Q6:How do users maintain the bias voltage of the A88 vacuum tube?
The amplifier is designed with an External Bias Adjustment feature. This allows users to easily calibrate and maintain optimal tube performance without needing to open or disassemble the chassis.
Q7:Is the A88 suitable for novice audiophiles?
Absolutely. Despite its high-end Class AB architecture, reviewers specifically note its intuitive setup and operation. This makes it an excellent choice for novices transitioning into serious tube audio equipment.
Q8:Does the A88package include protection for the vacuum tubes?
Yes. The A88 comes with a dedicated vacuum tube protective cage. This not only shields the hot internal glass components from accidental contact but also adds an elegant touch to the overall design.
Q9:Is the A88 amplifier designed as a power amp or an integrated amp?
The Oilily A88 is a Vacuum Tube Integrated Amplifier. It successfully combines both the preamplifier and power amplifier stages into a single unit, eliminating the need for separate components and ensuring greater space efficiency
Q10:How can the A88 vacuum tube be replaced?
The 6SL7 can replace the 6SL7GT, 6H9C, ECC35, CV569, and 6N9P5691 The 6SN7 can replace the 6SN7GT, 6H8C, ECC32, ECC33, 6N8P, and 5692 The KT88 can replace the KT90, KT88, 6550, 6550A, and 6550EH The EL34 can replace the EH6CA7
The A211 MK features a Class A single-ended 211 power amplifier architecture, with the voltage amplification stage and driver stage utilizing 12AX7 and 6SN7 tubes, respectively. It is paired with a wide-bandwidth output transformer and a low-leakage toroidal transformer, delivering the classic tube amplifier sound characterized by warmth, richness, transparency, low distortion, and high control, while balancing fidelity and musicality.
The unit features a built-in 30-second silent power-on delay. After power-up, the relay engages with a delay to prevent inrush current from damaging the speakers and amplifier components. This also allows the vacuum tubes to quickly reach their stable operating point, thereby extending the system’s lifespan and ensuring consistent sound quality.
The dual meters display the output level and the operating current of the vacuum tubes. Pressing and holding the bias test button allows you to monitor the bias currents of the left and right channel 211 power tubes separately, helping users quickly assess the operating status, matching, and health of the vacuum tubes to ensure optimal sound quality and safe operation.
Simply switch the signal selection on the front panel to LINE4 (PRE-IN) to enter pure power amplifier mode. Volume is controlled by an external preamp, allowing for flexible integration with high-end preamp systems to expand your setup options and enhance the system’s performance and compatibility.
Tubes are the heart of the sound; replacing them with different brands or models can significantly alter the tonal character. 211 power tubes must be replaced in pairs. When inserting or removing them, turn off the power and allow the unit to cool for 20 minutes; handle the tubes vertically and align the pins properly. Never mix and match tubes that are not intended to be used together.
Connect the speaker to the corresponding 4-ohm, 8-ohm, or 16-ohm terminals based on its rated impedance. Do not reverse the polarity or short-circuit the terminals. Impedance matching directly affects the damping factor, control, and distortion levels, and is key to achieving optimal sound quality and protecting the equipment.
The unit features an open, high-efficiency cooling system, which requires a well-ventilated operating environment free from obstructions and heat sources; it must be placed at least 15 cm away from walls. Internal high-voltage isolation, a no-load power-on prohibition, and output short-circuit protection are among the safety features designed to prevent overheating, arcing, and other safety hazards.
THD: 0.5% (1W/1kHz), Signal-to-Noise Ratio: 82dB (A-weighted), Frequency Response: 10Hz–22kHz (-3dB). Low distortion and a high signal-to-noise ratio ensure a clean, transparent sound with full detail, while the Class A architecture delivers a smooth listening experience.
Unauthorized disassembly or modification, use of non-genuine parts, failure to follow operating instructions, defacing the serial number, or failure to register the warranty card will void the official warranty. After-sales support is available through multiple channels, including the official website, email, phone, WhatsApp, and Telegram, for inquiries and factory repairs.
Featuring hand-wired point-to-point circuitry, high-end ALPS potentiometers from Japan, custom low-leakage toroidal transformers, wide-bandwidth output transformers, and high-quality shielded silver-plated cables, along with easy-to-install tube guards, the A211 MK’s materials and craftsmanship meet high-end Hi-Fi standards, ensuring stability and the highest possible sound quality.