Marantz PM-25

Audio Performance /Owner’s Observations/

Before the modifications, the amplifier had obvious issues with low frequencies; they were very weak and undefined, and the sound lacked punch.
Simply put, it wasn’t the sound I had envisioned; I needed something clean, precise, and balanced.

After the tuning, the bass is authoritative and precise, the soundstage has widened, and the resolution across all frequency ranges meets the needs of my work as a DJ—where hearing every musical detail is crucial when transitioning between tracks. Even though this model is quite old, it easily outperforms any stereo integrated amplifier in the 15,000–20,000 SK price range.