kingpage
1000+ Head-Fier
- Joined
- Apr 26, 2010
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Can a 9V wall wart power supply produce +/-9V? I seem to have seen some people refer to amps with a 9V power supply (not batteries) having +/-9V or something similar. I understand from the resources online and schematics that 9V is split into +4.5V and -4.5V through a virtual ground circuit.
Also, my HA11 amp has a 9V wall wart, and some 7809/7909 regulators. Does that mean it regulating +9V and -9V even though it's only a 9V power supply? I know you can't do that with a 9V battery in portable amps such as a Cmoy.
Some specs of desktop headphone amps state +/-15V, does that mean they are actually using a 30V wall wart (which is not exactly common) or their own rectifiers/transformers?
Any clarification would be great!
Also, my HA11 amp has a 9V wall wart, and some 7809/7909 regulators. Does that mean it regulating +9V and -9V even though it's only a 9V power supply? I know you can't do that with a 9V battery in portable amps such as a Cmoy.
Some specs of desktop headphone amps state +/-15V, does that mean they are actually using a 30V wall wart (which is not exactly common) or their own rectifiers/transformers?
Any clarification would be great!