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Amplifiers & DAC

E11K (A3)

  • Pre- amplifier OPA1642 
  • Power amplifier, AD8397 
  • 1400mAh built in battery 
  • All aluminium-alloy body and chassis
  • Toggle switches are more reliable
  • Bass boost option available

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Retail Price: S$99.00

Special Price: S$79.90

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Product Details

Technical Features

The A3 offers an improved sound performance. The pre-amplifier, OPA1642 serves as the voltage amplifier, with great layering and medium and high frequency extension. The power amplifier, AD8397 serves as the current amplifier, with great control of low frequencies and smooth drive. With a 1400mAh built-in battery, the A3 ensures more than 16 hours of battery life, and can be used while charging.


An all-aluminium-alloy body chassis increases metal texture and shielding from EM interference. New toggle switches are more reliable and easier to read and operate.

Other Functions

With a bass boost option, switching it on will boost the bass effect without influencing the overall sound field. When switched off, it bypasses the bass circuit, decreases interference and noise floor so as to ensure the purity of the sound quality.

Frequency Response           10Hz - 90kHz (-3dB, Input: 300mW) 
Output Impedance <0.2 ohms
Gain -3.8 dB (GAIN = L)
11.7dB (GAIN = H) 
Output Power 270mW (32 ohms / THD+N <1%) 
450mW (16 ohms / THD+N <1%) 
Drive Ability 16 ~ 150 ohms
Input Sensitivity 2.4V (GAIN = L)
0.8V (GAIN = H) 
Battery 1400 mAh
Up to 16 hours operation
Approximate 4 hours charge 
Dimensions 91.2mm x 56mm x 13mm

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