According to an Engadget explainer, the separate amplifier is often an unnecessary purchase for most sound system buyers. Many consumer speakers are active, meaning they have integrated amplifiers, and receivers typically combine amp and preamp functions. The article advises that unless you have passive speakers or a high-channel home theater setup, a dedicated amp is probably redundant.
The exceptions are specific: power-hungry systems such as 7.2.4 Dolby Atmos configurations may need an external amp, and passive speakers require one. The piece also warns against tube amps for home theater, noting they typically deliver 50 watts or less and require regular tube replacement, making solid-state amps the more practical choice for most.
For the audio business, the takeaway is that pushing amplifiers to mainstream customers may be misguided. The article points to more cost-effective upgrades: better speakers, adding rear or side channels, acoustic panels, and simple adjustments like moving speakers away from walls or running room calibration. Retailers and manufacturers may find more value in those categories than in standalone amp sales.