I think it sounds amazing, with no blasting at all. Many cheap portables didn't sound much better. Shows you how good even those early ones really were.
I have also done it occasionally with worn records or in times when all electric equipments were out of service. They sound pretty good, provided that the soundbox is fitted with a very soft tone needle like an Ondulette.
Arthur W. J. G. Ord-Hume's Laws of Collecting
1. Space will expand to accommodate an infinite number of possessions, regardless of their size.
2. Shortage of finance, however dire, will never prevent the acquisition of a desired object, however improbable its cost.