HA-300MK2 

Tube Amplifier Holy Grail

The Pursuit of Direct Heated Triode (DHT) DHT refers to triode tubes that use the cathode as the filament and will heat up the cathode directly.

Minimal approach offers stellar dynamic, transient and transparent, extremely well-received by audiophiles.

A challenge for headphone applications. Low tolerance to shock and vibration, sensitive to hum/interference.

The Irresistible 300B

The 300B is the most renowned and sought-after DHT because of its dreamy tonal characteristic.

HA-300MK2 uses a matched pair of Gold Lion Genelex PX300B low-noise audio triode as power output tubes.

• Endure and passed the toughest tests for reliability

• Natural, the sensible and realistic sound signature

• Impressive frequency extension

Purist’s One-Way Ticket

Less is More

Single-ended Triode (SET) Amplifier uses a single triode vacuum tube to produce amplified output without splitting the musical signal into parts.

2-stage amplification, a pair of driver tube amplifies signal voltage so that the 300B output tube will perform its amplification at a very linear condition.

Simplicity circuit design. Displace the beautiful tone of your vacuum tubes without any cancellation.

Tube Regulated Power Supply

2-Boxes Design

Outboard Power Supply minimize ripple effect and offer a clean, low-noise power to the amplification circuit.

Multi-stage tube regulated power supply circuit, feed power to different amplification stages independently.

Transformer-coupled Design

Balanced Driven from Single-ended Triode Amplifier

The 300B SET output drives a pair of proprietary output transformers and supports both headphones and speakers.

The secondary winding of the output transformers provides an alternative phase and composes a balanced output, enabling balanced driven from a SET amplification circuit.

Single-ended and balanced headphone outputs are "original" outputs from the transformers.

This Is All You'll Ever Need

Impedance Matched Phone Out

Optimized its output to handle the headphone loading according to three headphone impedance settings Low (L): 8Ω~64Ω; Medium (M): 65Ω-250Ω; High (H): 251Ω~600Ω.

Matching headphone impedance should produce a natural sound with well-defined bass reproduction, it is different from gain control of a solid state amplifier.

Planar Headphones are more sensitive to impedance matching than dynamic headphones but users can try out different impedance settings.

In-house Designed and Winded Transformers

With a pair of EI Transformers, HA-300MK2 delivers a natural and realistic sound across the frequency range.

Cayin designs and winds the all transformers in-house because they play a vital role in our amplifiers.

• Total freedom in specifying the requirements and winding instructions.

• Total control on material and craftsmanship.

Carefully Optimized Headphone Outputs

HA-300MK2 offers three headphone outputs: 6.3mm single-ended, 4.4mm balanced, and 4-pin XLR balanced.

The XLR4 output is a full-fetched output but the 4.4mm output is optimized for a wider range of headphones, including high-sensitivity portable headphones.

• 4.4mm is level-matched, lower noise, lower power output with the same audio performance

• at LOW headphone impedance, the 4.4mm output delivers roughly 70% of 4-pin XLR output only.

Powerful and Effortless

Combinations all audiophiles will cherish and admire: purity of single-ended triode amplifier, the dreamy sound signature of 300B, and authoritative dynamic and control when called for.

With up to 6w per channel, provides all the power you need to handle a vast selection of headphones, from portable friendly dynamics to extremely demanding planar.

Professionally Precision

Low noise low distortion electronic controlled resistor ladder analogue volume controller JRC MUSE72320V, commonly used in high-end preamplifiers and streamers.

4-channel in one integrated controller offers high precision and zero channel imbalance.

ALPS balanced potentiometer as a 41-steps encoder to provide precise and intiuative control that we are all familiar with.

Interface Facilitates Functions

Quick-release Connection

Lock-on & quick-release aviation-grade copper connectors.

Silver plated Teflon umbilical cable connects between outboard power supply and amplifier circuit.

Dual Inputs

Balanced (XLR) and Single-ended (RCA) to cover a variety of inputs.

Balanced input will go through a pair of input transformers, the + and – half cycle will merge to become a single-ended signal.

Speaker Output

Users can toggle between speaker and headphone output.

With 8W per channel Class A output, the amplifier can drive high sensitive speakers or common bookshelf speakers in a small listening area.

High quality solid brass speaker terminals.

Enhance Your Daily Usage

Anti-Interference Improves Listening Experience

Custom-made silica gel shock absorbers between critical tube components, chassis mainframe and tube socket, remove microphonic effectively.

Reinforcing shielding of transformers and effective circuit layout to minimize interference.