25vdc compared to 36vdc on 7294, looking for input on design

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i have only available a, 17.7-0-17.7 ac power transformer,

the PT will power this rectifier,
max input 33vac
the rectifier power supply will supply this set of TDA7294 amps with 25vcd.



the 35 VTC (17.7-0-17.7) transformer is the only PT i have within range of the amp chip, witch is Input voltageC ±25V--±38V
i have 25v but should i be concerned for response?



ok my question is how will 25v compare to say the recommended 36v???????

i know the lower volts will lower wattage, but iam not concerned with watts, i only have high efficiency tube amp speakers.

any input will be greatly appreciated!

oh ya, can any speculate or identify the amp rating on the transformer pictured on top?, mounted to guitar amp, the 7294 should be gettin 1A-1.5A, will the PT be ok?

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ok say if the VA rating on my power transformer is underrated, what will be result, will it be ok?