Onkyo Integra P-306R

Overview

The Onkyo Integra P-306R is a high-grade stereo control preamplifier from Onkyo’s respected Integra line. Designed for use with a separate power amplifier, it provides line-level source switching, tape facilities, tone control, and an unusually flexible phono section supporting moving-magnet, moving-coil, and high-output moving-coil cartridges.

Its published specifications reflect serious engineering: very wide bandwidth, low noise, high phono overload margins, and a maximum output capability far beyond what most power amplifiers require. The P-306R was also designed around Onkyo’s Super Servo system, which could be used with a compatible Onkyo power amplifier to reduce the effects of cable and grounding resistance in the signal path.

Why This Model Matters

The P-306R comes from a period when Onkyo was building ambitious separates that competed on engineering rather than nostalgia. The Integra name signaled the company’s better-finished, higher-performance components, and this preamplifier is a good example: technically sophisticated, versatile, and built for listeners who wanted more control than an integrated amplifier or receiver could offer.

Its phono stage is particularly relevant today. Many modern preamplifiers omit vinyl support entirely, while the P-306R accommodates several cartridge types and provides the flexibility expected in a serious analog system.

Highlights

• Separate stereo control preamplifier
• Moving-magnet, moving-coil, and high-output MC phono support
• Onkyo Super Servo system for compatible power amplifiers
• Wide-bandwidth, low-noise design
• Multiple line and tape connections

Who It’s For

A strong choice for an all-analog separates system, especially one built around vinyl. It will appeal to listeners who value flexible phono loading, period Japanese engineering, and a less common alternative to the best-known vintage preamplifier brands.