Because this is an acoustic suspension design (sealed box), the bass is not boomy like a ported speaker. It is punchy, quick, and very linear down to about 40Hz. It feels "warm" in the lower mid-bass (around 120Hz), which gives vintage rock a lovely fatness. However, because it is sealed, you need volume to feel the kick drum.
: Reviewers describe the sound as "decent" and "balanced," featuring a soft, warm bass paired with well-integrated mids and highs. Nostalgic Appeal grundig box 8000 review hot