Friday, January 3, 2014

Wow Audio Lab L1 Preamplifier


























































































































$3300

Fully discrete amplification circuit.

Pure class A operation.

Full-function remote control operation.

96 step volume control, each of 1 dB.

Channel balance 96step, each of 1 dB.

Silent-mode LCD display.

Super rigid aluminum monocoque chassis.

Individual circuit for preamp stage and headphone amplifier stage.

Headphone amplifier employs high-current MOSFET output stage.

The high voltage swing, high output current and low noise characteristics allows driving any dynamic headphone with ease.

All transistors and components were custom matched to suit circuit need.

No solder mask was used in the Print Circuit Board (PCB), it enhance clarity of sound image.

The copper track in Print Circuit Board (PCB) was Gold plated, to further improve sound quality.

3% silver solder was used in production line.

Each amplifier was hand-made by qualified technician to ensure highest quality.


Preamp section:
Frequency response: DC to 1MHz -1.5dB
Gain: 15dB
Input impedance: 22K
Maximum input level: 4.5Vrms
Maximum output voltage swing: 30Vpp
Input: 2 pair unbalanced (RCA)
Output: 1 pair unbalanced (RCA)


Headphone amp section:
Freq. response: 10Hz to 300KHz -1.5dB
Gain: 16dB
Input impedance: 22K
Maximum input level: 4.5Vrms
Maximum output voltage swing: 75Vpp
Power output per channel:
5.2W @ 32 ohm (with protection disabled)
4.6W @ 64 ohm
3.5W @ 120 ohm
2.1W @ 250 ohm
1W @ 600 ohm
Output: 1 headphone output jack (6.3mm)

Dimensions: 240 x 357 x 96mm W x D x H
Weight: 10.8 kg

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