KingRex – T20 U

T20 U AMP –Blue Moon Award 2007(http://www.6moons.com/archivelibrary/bma2007.html) Tube Sound USB Tripath (Class T) AMP ~6 moons Sept 2007 KingRex T20 U AMP is basically the same Class T (based Tripath Technology) 20 Watt integrated amplifier with an onboard USB interface and DAC (digital to analog converter). The convenience for digital life is all we looking for but without any unexpected noise and distortion of your favorite music.

Why KingRex design the T20 U?

Nowadays, the computer is ubiquitous in many people daily life. But why the Hi Fi audio equipment still only in music lover’s living room not just next to their PC? Although the all the PC could handle multi-media display very well. However, the sound card or the audio chip is for 5.1 or 7.1 using. It’s good for movie seeing or game playing but can not provide the purity sound for the audiophile, especially the unexpected noise and distortion. The KingRex T20 U could get the digital signal directly from your computer with built-in USB interface and DAC (digital-analog converter). There will be no chance to inflicted noise and distortion so you only able to hear the authentic music no less and no more .

Based on Tripath TA-2020-020 DPP chip. KingRex T20 AMP is capable of 2 ＊ 20 Watts at 4 Ohms with 80% energy efficiency. The heart of the T20 U DAC is the Burr-Brown PCM2702E which a 32/44.1/48 KHz ready 16-bit stereo DAC with USB interface, on chip clock generator, 8 times oversampling digital interpolation filter and analog output low-pass filter. The low-pass filters, the analog two-channel signals are handed over to the Burr-Brown OPA2604 op amp acts as output stage preamp. It also functions as a low-pass filter, taking out the residual digital garbage and turns the audio signals into more analogue sounding stream. A pair of TL072 low noise dual JFET op amps are assigned to the DC servo circuit for sure the audio signals are clear. The T20 U has one set of line input and one set of USB interface, both the input sockets and toggle switch are located on the rear panel to keep the front panel as clean as the T20. Input selection is electronically executed by a relay.

Specification

MODEL: T20 CLASS T AUDIO AMPLIFIER

1. Using TRIPATH ® power module TA2020-20

DAC module: Burr-Brown PCM2702e

Low pass filiter: Burr-Brown OPA2604

2. “Audiophile” Quality Sound

0.03%THD+N@10W 4ohm

0.1% THD+N@12W 4 ohm

0.18%IHF-IM@1W 4ohm

3. Power output

22W@4 , 10%THD +N, VDD=13.5V

13W@8 , 10%THD+N, VDD=13.5V

4. High Efficiency

88%@12W 8ohm

81%@20W 4ohm

5. Dynamic Range =99dB

1. Over Current & Over Temperature Protection

2. Using anodize gold RCA and SP terminal

3. 6m/m thickness aluminum face plate and aluminum button switch using audio capacitance.