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SINGXER SA2 Class A Fully Balanced Discrete Headphone Amplifier & Preamplifier
- The SA-2 employs a true quad-channel, fully independent, all-discrete Class A amplifier circuit design. Its pure analog amplification and control circuitry eliminate EMI interference from digital control, ensuring faithful reproduction of music's analog character.; Supports single-ended and balanced inputs with seamless switching;; Features multiple output interfaces: XLR 4-pin true balanced, 6.35mm single-ended, and 4.4mm balanced connectors; also functions as a preamp with single-ended and balanced outputs;; Offers high/low gain settingslow gain effortlessly drives in-ear monitors and ultra-sensitive earphones (while maintaining inaudible noise floor); High-gain mode drives demanding headphones including high-impedance dynamic drivers, low-impedance planar magnetic drivers, and even ultra-low-sensitivity models like KK.; Supports high/low impedance output: High impedance suits high-impedance headphones; low impedance drives low-impedance but high-current-demand headphones. Switch freely between powerful, controlled sound and relaxed, analog-flavored audio.
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SPECIFICATIONS SA-2
Class A Mode: Balanced
16-ohm load: Below 400mW;
Balanced 32-ohm load: Below 800mW;
Balanced 64-ohm load: Below 1600mW;
Balanced loads above 64 ohms: Nearly all power is Class A SA-2
Gain Settings:
1.
Single-ended input to single-ended output: Low gain = 0dB, High gain = 12.8 dB;
2.
Single-ended input to balanced output: Low gain = 6dB, High gain = 18.8 dB;
3.
Balanced input to single-ended output: Low gain = -6dB, High gain = 6.8 dB;
4.
Balanced input to balanced output: Low gain is 0dB, high gain is 12.8 dB
Input impedance:
Single-ended: 33K ohms
Balanced: 20K ohms
Input sensitivity: Balanced
input to balanced output: High
gain: 4.2V
RMS Low gain: 18V RMS Single-ended input to balanced output: Low
gain: 9V
RMS Single-ended input balanced output: High
gain: 2.1V RMS
Headphone Output Impedance: Switch LOW-Z is low-impedance mode, HI-Z is high-impedance mode;
Low-impedance output impedance: 0.15 ohms (balanced) and 1.1 ohms (single-ended);
High-impedance output impedance: 10 ohms (balanced) and 11 ohms (single-ended);
Preamp Output: Single-ended impedance 75 ohms, balanced impedance 150 ohms
Dimensions of the chassis: 234mm × 170mm × 46mm, excluding the height of the chassis feet and protruding connectors at the rear.
Unit weight: approximately 1.8 kg
Carton dimensions: 350mm × 230mm × 110mm
Shipping package weight: approximately 2.3 kg
Upgrade specs:
1. Output power increased from SA-1's 5.5 watts into 32 ohms to 10 watts into 32 ohms, with a maximum of 15 watts into 20 ohms; supports headphones down to 8 ohms minimum impedance.
2. Circuit optimization maintains ultra-low distortion even at high power output.
3. Enhanced thermal management with a copper block + aluminum alloy heatsink design;
4. Reduced impedance at the balanced headphone output, boosting current drive capability for greater pushing power;
5. Optimized PCB routing, adjusted DC bias circuitry, added DC servo design, and incorporated a GND/LIFT mode switch; Supports global AC voltages 100V-240V without switching; identical hardware for China, Europe, US, and UK versions, differing only in included power cords.
Class A Mode: Balanced
16-ohm load: Below 400mW;
Balanced 32-ohm load: Below 800mW;
Balanced 64-ohm load: Below 1600mW;
Balanced loads above 64 ohms: Nearly all power is Class A SA-2
Gain Settings:
1.
Single-ended input to single-ended output: Low gain = 0dB, High gain = 12.8 dB;
2.
Single-ended input to balanced output: Low gain = 6dB, High gain = 18.8 dB;
3.
Balanced input to single-ended output: Low gain = -6dB, High gain = 6.8 dB;
4.
Balanced input to balanced output: Low gain is 0dB, high gain is 12.8 dB
Input impedance:
Single-ended: 33K ohms
Balanced: 20K ohms
Input sensitivity: Balanced
input to balanced output: High
gain: 4.2V
RMS Low gain: 18V RMS Single-ended input to balanced output: Low
gain: 9V
RMS Single-ended input balanced output: High
gain: 2.1V RMS
Headphone Output Impedance: Switch LOW-Z is low-impedance mode, HI-Z is high-impedance mode;
Low-impedance output impedance: 0.15 ohms (balanced) and 1.1 ohms (single-ended);
High-impedance output impedance: 10 ohms (balanced) and 11 ohms (single-ended);
Preamp Output: Single-ended impedance 75 ohms, balanced impedance 150 ohms
Dimensions of the chassis: 234mm × 170mm × 46mm, excluding the height of the chassis feet and protruding connectors at the rear.
Unit weight: approximately 1.8 kg
Carton dimensions: 350mm × 230mm × 110mm
Shipping package weight: approximately 2.3 kg
Upgrade specs:
1. Output power increased from SA-1's 5.5 watts into 32 ohms to 10 watts into 32 ohms, with a maximum of 15 watts into 20 ohms; supports headphones down to 8 ohms minimum impedance.
2. Circuit optimization maintains ultra-low distortion even at high power output.
3. Enhanced thermal management with a copper block + aluminum alloy heatsink design;
4. Reduced impedance at the balanced headphone output, boosting current drive capability for greater pushing power;
5. Optimized PCB routing, adjusted DC bias circuitry, added DC servo design, and incorporated a GND/LIFT mode switch; Supports global AC voltages 100V-240V without switching; identical hardware for China, Europe, US, and UK versions, differing only in included power cords.
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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Return Policies
- Return for refund within: 30 days
- Return for replacement within: non-replaceable
- This item is covered by Nexus3C Return Policy
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