"La Onda Pesada" (1971) by Ernan Roch showcases the most experimental side of Mexican rock of the era, blending blues and psychedelia, with Hendrix-style guitars driven by powerful fuzz riffs, alongside more folk oriented passages and deeply poetic lyrics. This album has become one of the most coveted titles among collectors due to its outstanding musical quality and the fact that it suffered the consequences of the persecution of Mexican rock, which prevented it from being properly circulated at the time of its original release and resulted in very limited sales, condemning it to years of obscurity. Our fully licensed reissue includes liner notes and remastered sound.