Voltage drop when driving voice coil OpAmp gain stage
If you look at the data sheet, on pages 4 and 5 you'll see VOUT. Notice that, with a 5 volt supply and 600 ohm load, you cannot be certain of getting more than 3.1 volts.
I am astonished that you are getting .25 volts with a 10 ohm load. This is far beyond what the data sheet suggests. Your op amp is putting out 25 mA, when its rated max is about 5 mA (10 volts into 2k, or 3 volts into 600). I'll bet it's also getting hot.
You need a buffer amp which will provide something in excess of 100 mA, and that's for a 1 volt output. You don't say what your maximum output voltage is expected to be, but if it's 3 volts, you need a 300 mA buffer which is rated to produce that current with about 4 volt supplies.