The PPA-02B passive pre-amplifier is for music lovers who can appreciate the best a passive pre-amplifier can offer.

The design of PPA-02B is based on our proven VR-connected transformers to provide smooth mechanical 59 steps volume control switch from 20dB-80dB. Additional features include 59 steps gain control switch, 59 steps auto-transformer (C Core), 90 degree auto-transformer installation, flexible GND usage combination, and more.

PPA-02B is also an entirely passive design with literally zero extra power sources plugged into the audio signal path, meaning that no power is required and neither distortion nor interference are added by active components or power lines to this device. All these are 100% designed and handcrafted in Hong Kong.

Whether you are already a fan of passive pre-amplifiers or somebody who has never tried a passive pre-amplfier before, PPA-02B will surely enable you to have a delightful music experience.

PPA-02B increase XLR input to 3 different input ports(Port A, B and C), audio players can be freely to be connected, to the corresponding RCA (Red and White Ports) or XLR

Adopting a 59 steps auto-transformer (C Core) with the latest “cool-melted method” technology, no metal clamp is needed to stabilize the auto-transformers – you can imagine how successfully it maintains the high performance of sound from material mismatch as compared to a traditional transformer design.

Please realize that our PPA-02B uses only a 59 steps mechanical volume control with a 59 steps auto-transformer (C Core) design which effectively prevents the sound quality from worsening, the output control of a digital switch-connect external remote device can feature the most gorgeous sound experience.

With the application of the Magnetic Hysteresis theory, the winding coil around our 59 steps auto-transformer (C Core) induces a magnetic force that delivers a high built quality of sound, with RCA 1x, 3x, 5x, 10x and XLR 0.5x, 1.5x, 2.5x, 5x gain options

59 steps auto-transformer (C Core) is the core of PPA-02B technology. Differs from the traditional VR-connected transformer based control, C core transformer based volume control switch offers a special, gorgeous yet satisfying sound that defines irresistible high performance.

Using a confidential core material, our 59 steps auto-transformer (C Core) uses no metal clamp for stabilizing, but adopts a new “cool-melted method” technology. The result is a satisfying performance without the drop of sound quality caused by the material mismatch due to the use metal clamps in the conventional transformer design.

We use two auto-transformers in the PPA-02B passive pre-amplifier. What is more special about the 59 steps auto-transformer (C Core), would be the angle made of 90 degree of two auto-transformers during installation, which effectively minimizes path distortions caused by R and L channels interactions.

To make our 59 steps auto-transformer(C Core) more special, we install the two auto-transformers in our PPA-02B passive pre-amplifier at a 90 degree angle to effectively minimizes path distortions caused by R and L channels interactions.

We offer the flexible use of House GND and Audio GND. There is no restriction on connecting both the GND ports to the ground box, or shorting both House GND and Audio GND by connecting a jumper wire when you need to. Our PPA-02B is designed to satisfy the requirements of all music lovers.