Here are the some of the specs of my Schiit Magnius balanced headphone amplifier that shows the difference between balanced and single-end headphone connection:
Balanced Headphone Output:
Maximum Power, 16 ohms: 6.0W RMS per channel
Maximum Power, 32 ohms: 5.0W RMS per channel
Maximum Power, 50 ohms: 3.2W RMS per channel
Maximum Power, 300 ohms: 1000mW RMS per channel
Maximum Power, 600 ohms: 500mW RMS per channel
Single-Ended Headphone Output:
Maximum Power, 16 ohms: 2.2W RMS per channel
Maximum Power, 32 ohms: 2.0W RMS per channel
Maximum Power, 50 ohms: 1.3W RMS per channel
Maximum Power, 300 ohms: 300mW RMS per channel
Maximum Power, 600 ohms: 150mW RMS per channel
THD+N:
Low Gain, Balanced Output: Less than 0.0001% (-119dB) at 4V RMS into 32 ohms
High Gain, Balanced Output: Less than 0.0003% (-110dB) at 4V RMS into 32 ohms
Low Gain, SE Output: Less than 0.003% (-90dB) at 1V RMS into 32 ohms
High Gain, SE Output: Less than 0.004% (-87db) at 2V RMS into 32 ohms
IMD:
Low Gain, Balanced Output: Less than -112dB at 4V RMS into 32 ohms, CCIF
High Gain, Balanced Output: Less than -110dB at 4V RMS into 32 ohms, CCIF
Low Gain, SE Output: Less than -73dB at 1V RMS into 32 ohms, CCIF
High Gain, SE Output: Less than -72dB at 2V RMS into 32 ohms, CCIF
SNR:
Low Gain, Balanced Output: Greater than 125dB, unweighted, referenced to 4V RMS
High Gain, Balanced Output: Greater than 115dB, unweighted, referenced to 4V RMS
Low Gain, SE Output: Greater than 105dB, unweighted, referenced to 1V RMS
High Gain, SE Output: Greater than 110dB, unweighted, referenced to 2V RMS
Balanced Headphone Output:
Maximum Power, 16 ohms: 6.0W RMS per channel
Maximum Power, 32 ohms: 5.0W RMS per channel
Maximum Power, 50 ohms: 3.2W RMS per channel
Maximum Power, 300 ohms: 1000mW RMS per channel
Maximum Power, 600 ohms: 500mW RMS per channel
Single-Ended Headphone Output:
Maximum Power, 16 ohms: 2.2W RMS per channel
Maximum Power, 32 ohms: 2.0W RMS per channel
Maximum Power, 50 ohms: 1.3W RMS per channel
Maximum Power, 300 ohms: 300mW RMS per channel
Maximum Power, 600 ohms: 150mW RMS per channel
THD+N:
Low Gain, Balanced Output: Less than 0.0001% (-119dB) at 4V RMS into 32 ohms
High Gain, Balanced Output: Less than 0.0003% (-110dB) at 4V RMS into 32 ohms
Low Gain, SE Output: Less than 0.003% (-90dB) at 1V RMS into 32 ohms
High Gain, SE Output: Less than 0.004% (-87db) at 2V RMS into 32 ohms
IMD:
Low Gain, Balanced Output: Less than -112dB at 4V RMS into 32 ohms, CCIF
High Gain, Balanced Output: Less than -110dB at 4V RMS into 32 ohms, CCIF
Low Gain, SE Output: Less than -73dB at 1V RMS into 32 ohms, CCIF
High Gain, SE Output: Less than -72dB at 2V RMS into 32 ohms, CCIF
SNR:
Low Gain, Balanced Output: Greater than 125dB, unweighted, referenced to 4V RMS
High Gain, Balanced Output: Greater than 115dB, unweighted, referenced to 4V RMS
Low Gain, SE Output: Greater than 105dB, unweighted, referenced to 1V RMS
High Gain, SE Output: Greater than 110dB, unweighted, referenced to 2V RMS