Wayne Parham Messages: 18838 Registered: January 2001
Illuminati (33rd Degree)
I don't have a 2325, but I don't see any reason why 4 ohms would be too low for it. Even if it is designed for an 8 ohm load, I imagine it will work with a 4 ohm load. It may reach maximum output sooner than it would with an 8 ohm load though, so don't push it as hard.
I have a 2270 and a 2240. In their manuals they rate power as the same at either 8 or 4 ohms. My 2270 service manual shows a rating of 70 watts at 4 or 8 ohms with both channels driven. Also, both my 2270 and 2240 manuals show how to connect two sets of speakers and run them at the same time. Since most speakers of the time were 8 ohms, this would present a 4 ohm load to the amplifier. It should be safe to run your 2325 with a 4 ohm speaker.