Apollon Audio is a Slovenian amplifier manufacturer based in Maribor, founded by Tibor Marksel, a musician and mixing/mastering engineer who started the company to build Class D amplifiers for his own studio work and professional clients. The company hand-builds every unit to order, specializing in designs that use third-party amplifier modules — primarily Hypex NCore (including NCx500 and NCOREx) and Purifi Eigentakt (1ET6525SA, 1ET7040SA) — wrapped in custom enclosures with options for linear power supplies, upgraded op-amps, and multi-channel configurations.

The product range covers stereo amplifiers, monoblocks, and multichannel amps intended for demanding studio monitoring setups, home cinema, and high-end audiophile listening. Notable models include the PET 950 monoblocks built around the Purifi 1ET7040SA platform, the Hypex NCx500 ST stereo amplifier, the NCMP1000, and the PNC2K premium monoblock line. Apollon has built a following in DIY and audiophile communities — discussed extensively on forums like AVS Forum and Audio Science Review — for offering professionally assembled versions of module-based designs that enthusiasts would otherwise have to build themselves.

Apollon Audio has 17 products cataloged on Equipboard, including Studio Monitor Amplifiers.