GoldenWave Gordon Audio GA-X fully balanced Class A flagship headphone amplifier, aviation-grade aluminum ingot CNC machined chassis, four-channel differential amplifier, pure Class A amplifier circuit, single-ended and balanced input each set of signal input, a set of balanced preamp Output, a 4-pin balanced headphone output, two 6.35mm headphone output.
Since GA-X was released two years ago, it has not stopped trying, modifying and optimizing, although there are only two versions of GAX on the market.(One of them is a later version optimized for thermal noise), But we have been trying to go further, whether it is sound or craftsmanship. The brand-new GA-X evo only retains the appearance and size of the old GA-X. The function, design, and sound tuning are all subverted and redesigned.
In terms of function, increase gain adjustment, high and low gain, to respond to various use environments, can drive low-impedance headphones; built-in independent pre-output design, completely independent of the headphone amplifier, and independently choose whether The output is no longer an included design.
In terms of design, the new version of GA-X adds a heat sink. The pure Class A design will inevitably have enough heat. This will stabilize the temperature of the whole machine at a balanced point. Passive heat dissipation at a temperature of 30 degrees, continuous 48 work, stable within 45 degrees(This is just an internal test, it is not recommended to power on continuously without shutting down at any time).
In terms of sound tuning, the new version is more stable than the old design. In particular, the reproduction of the low frequency and the overall atmosphere is more smooth, relaxed and complete; the triangular sound frame, the full frequency control is greatly improved, and the sense of music is also the focus of this update.
a brief introdction:
1. The whole machine adopts a fully balanced driving mode. The single-ended/balanced audio signal is selected by input and enters GLDENWAVE''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s most classic pre-amplifier module optimized for GA-X evo. For this module, we designed a buffer composed of an ultra-low noise high-speed operational amplifier to match the input impedance and provide the first-stage gain; then the signal enters the precision interactive feedback balanced amplifier, the architecture has ultra-high CMRR(Common mode rejection), Ultra-low noise and high response speed, and relatively low output impedance to drive the subsequent volume adjustment. After the volume is adjusted, the signal enters the FET and separates the original components to form the final Class A amplifier to drive the earphones.
2. GA-X evo has four completely independent Class A headphone amplifiers. By FET(Field effect tube)The input buffer is composed of high input impedance. GOLDENWAVE has designed a reasonable and stable constant current source for each level of the amplifier. The current mode topology has better bandwidth and response speed, and the output drive is MOS- FET tube, the use of good J-FET and MOS-FET devices can have the special charm of vacuum tube GOLDENWAVE carefully adjusts the gain distribution and negative feedback at all levels to make the amplifier work in the best condition. The +-24V power supply allows the amplifier''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s output swing to be sufficiently guaranteed, and it is easy to do in large dynamic and large scenes.
3. GOLDENWAVE has especially improved the preamplifier function and designed an independent fully balanced preamplifier module for GA-X evo. The headphone driver and the preamplifier are completely independent of each other and do not interfere with each other, and can be selected through the panel buttons.
4. The power supply is always the most important part of GOLDENWAVE. The whole machine is powered by a 120W toroidal transformer, which has a power reserve of more than 100%. The high-current high-speed rectifier module cooperates with 4 large water pond filter capacitors to form a rectifier filter circuit. The left and right channels are independent, and the front and rear modules have independent precision high-speed voltage regulators to provide a steady stream of pure and high transient response power supply for the whole machine.
Technical index:
Signal input: stereo balanced XLR*1, single-ended RCA*1
Headphone output: 4-core balanced*1, double three-core balanced*1, 6.35mm single-ended*2
Pre-level signal output: stereo balanced XLR*1
Frequency response: 20Hz-50KHz/-0.3dB@1KHz
Signal to noise ratio: -110dB @1KHz
THD+N: 0.0013% @1KHz, 300Ω
Output Power:(0.1% @1kHz, balanced)10W@32Ω, 6W@64Ω, 2.5W@150Ω, 1W@300Ω, 560mW@600Ω
Whole machine power consumption: <80W
Body size (width * height * depth): 330mm*70mm*260mm
Net weight: 7.5kg