Power Holdings Inc is an international consumer audio product development and distribution company. We specialize in marketing high end audio components and accessories to music enthusiasts in North America.
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When exquisite design accomplished by first class engineering, when aesthetic backed up by rigorous production.The HA-3A vacuum tube headphone amplifier let you enjoy your beloved music through your choice of headphones or earphone in a dedicated, engaging, and indulging retreat.HA-3A might look compact and simple, but Cayin has devoted our renowned engineering, decades of audio equipment manufacturing and carefully selected performance-based components to make this happen.
HA-3A uses an RCA 22DE4 as rectifier tube, one the best versions of 22DE4 available in tube market.While converting incoming power source to DC current the 22DE4 rectifier tube minimizes interference and provides clean power to the amplification circuit.
Driver Tubes: Dual 12AU7/ECC82(Matched Pair) from JJ*Output Tubes: Dual 6V6S (Matched Pair) from JJ*
The HA-3A vacuum tube amplification is designed as a 2-stage single-ended circuit.The 12AU7/ECC82 driver tubes will amplify the voltage level of the incoming audio signal so that the 6V6S output tubes will perform its amplification at a very linear condition.Single-ended circuit design displaces the beautiful tone of your vacuum tubes without any cancellation.Single-ended uses matched pair instead of matched quad-set tubes, you can enjoy greater flexibility when you perform tube rolling.
The 6V6S output drives a pair of proprietary output transformers that supports single-ended and balanced headphone outputs.The secondary winding of the output transformer provide an alternative phase and compose a balanced output, enables balanced driver from a single-ended vacuum tube amplification circuit.Both single-ended and balanced headphones are “original” outputs from the transformers.
Our engineers have optimized HA-3A’s output to handle the headphone loading according to three headphone impedance settings:
The 4-Pin XLR output is a full-fetched output but the 4.4mm output is optimized for wider range of headphones, including high sensitivity portable headphones.
The chassis and transformer pots are treated by our proprietary 14 rounds of crafting process composed of scratch, spray, sanding and baking.The high gloss final finishing endows a refined and delicate texture as well as protecting the amplifier during years of long service.
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.
Time consuming, shortest signal path, better attention to detail, the entire circuitry is handwired by skillful craftsmen.Implement circuit design with high-level of transparency and refinement, improves overall efficiency and conductivity.
Cayin always design, wind and use high inductance, high efficiency power transformers in our products.Reinforcing shielding design minimizes the interference and noise while ensure HA-3A to work in the best condition.
High performance 50KA*2 Dual Unit smooth potentiometer from ALPS offers durable, high-precision volume control with excellent operational fee.
Special shielding and anti-shock design removes microphonic effectively.
A set of three 39x18mm XL shock-absorbing aluminum foot pads to provide firm and stable amplifier placement at any hard flat surface.2-rear & 1-front self-levelled placement to handle the extra weight on the back of the amplifier due to the power and output transformers.
Specially designed vacuum tube shielding cage to protect users from touching the red hot vacuum tubes during operation.
Enhanced circuit protection and minimizes pop noise during start-up.
Welcome to Power Holdings Inc! We have been in business since 2008 providing audiophiles with equipment and customer service that we are proud of. Our brands are sold throughout the USA and Canada both online and in retail stores. Please see our list of AUTHORIZED RESELLERS to find a dealer near you. You can also purchase these products on this website. If you have any questions please feel free to Contact Us.
Enjoy the music, Arthur G H Power IV