Hi Kyle,
Once again, you do not know that a 26VAC transformer has a peak poltage of 36.8V and the rectifiers will charge the filter capacitors to about 35VDC.
Your 25V transformer with two 25VAC windings will make a power supply that is about plus and minus 33VDC. The LM3886 will have an output of 53W into 8 ohms.