Originally Posted by jinetix
I want to connect two different headphone amplifiers to my DAC. Is it wise to use a Y-splitter to connect both amplifiers to the DAC? Will the sound quality degrade from using a splitter? I want to avoid disconnecting and connecting cables every time I want to switch setups to avoid wear and tear.
It depends on your DAC, but if it has a good line output buffer (and that can even be something like a cheap NE5532 op amp with 100 Ω output resistors), it should have no problem driving two parallel amplifier inputs, and the quality should not be audibly degraded (the voltage may drop very slightly, though), especially if you do not use unusually long and bad quality cables. Potential problems are increased risk of ground loops (as noted by someone else already - if this happens, you will notice hum or computer noise appearing in the audio), and some amplifier inputs can distort the signal when the amplifier is turned off.