I've done a direct comparison of the Van Alstine bandwidth limiting input vs stock Dynaco ST-70 input with two identically re-built Dynaco amplifiers.
The Van Alstine circuit cleans the ST-70 up alot. The amplifier is more neutral and transparent, while at the same time being more dynamic and quick paced. Much more interesting to listen to at lower volume levels as well. Soundstage with the Van Alstine input does not appear as big or forward, but I would say that is only due to the increase in transparency.
The Van Alstine circuit cleans the ST-70 up alot. The amplifier is more neutral and transparent, while at the same time being more dynamic and quick paced. Much more interesting to listen to at lower volume levels as well. Soundstage with the Van Alstine input does not appear as big or forward, but I would say that is only due to the increase in transparency.