I repeated the tests with a 150 ohms dummy load and the results were the same, i.e. PO output levels are similar to iPad.
I also checked the OP-1 output at max volume under the same conditions and it gets to about 1.5Vpp, i.e., just a tad lower.
I repeated the tests with a 150 ohms dummy load and the results were the same, i.e. PO output levels are similar to iPad.
I also checked the OP-1 output at max volume under the same conditions and it gets to about 1.5Vpp, i.e., just a tad lower.