CEE TEE warned me that this issue would need to be clarified sooner rather than later... Balanced Lines / Differential Signaling Technically, "balanced" simply means two wires with the same impedance to ground. That's it. Think twisted pairs used for telephone lines or Ethernet. Differential signaling is where the two symmetric (out-of-phase to each other) signals are used with each leg. Differential signaling is often used on balanced lines, so for the sake of discussion and common use, let's say that the term balanced implies differential signaling. Figure 1: Four Pairs of Balanced Lines Balanced Bridged Amps Balanced bridged is two separate amplifiers with each amplifier powering one leg of the differential signal. It's output is balanced. Calling this arrangement "fully" (from beginning to end) balanced is acceptable. Examples of this include many car amps or pro amps (many of which have a balanced switch to turn a two-channel stereo amp into a more powerful mono amp), "balanced" four channel B22s, the old Balanced HeadRoom amps, HeadRoom GSX, etc. Balanced bridged amps have twice as much voltage swing, twice as much distortion, twice the output impedance, and theoretically four times the power (although it's more realistically like two times the power) and less environmental noise. Figure 2: Balanced Bridged Amp with Balanced Output Looking at the above, it should be clear that we can actually buy two Magni 2Us and stick them together to make a balanced bridge amp. Balanced Output Amps It is possible for transformer coupled tube amps to have balanced outputs because the transformers are inherently balanced. This can be done by leaving the secondary windings floating. DNA and EC amps offer balanced outputs. Also, circlotron output stage amps like the Schiit Ragnarok are inherently balanced. Figure 3: Balanced Output from Single Ended Transformer Coupled Amp Usage of the Term Balanced ACCEPTABLE: That amp is not "fully" balanced (the implication is balanced from beginning to end). Although it's probably better to be more specific on the architecture and the outputs of the amp. NONSENSE: That amp is not "really" or "truly" balanced. Need to be more specific. PARTIALLY CORRECT: The BA is not a balanced amp. Need to be more specific. The BA has balanced inputs and balanced outputs. The amp is single-ended, not balanced bridged.