Not lousy, just not exactly Dumble. No doubt it sounded just fine to the product manager that signed off on it.I could see a US transformer being a little better than the better/ best Chinese transformer but I'm not sure it's worth assuming VHT would "under spec" transformers to save another $5 per amp if it means they sound lousy.
$5 a unit is a fortune, you better believe they will cut that cost if they think they can get away with it.