AV Receiver vs. Separates

What "separates" actually means here

Every AV receiver is really two products squeezed into one chassis: a processor that decodes, switches, and applies room correction, and a set of built-in power amp channels that actually drive your speakers. True audiophile separates replace both halves entirely — a dedicated preamp/processor plus one or more standalone power amplifiers handling every channel, sometimes down to a monoblock amp per speaker.

Almost nobody upgrading from a receiver needs to go that far, and it's not what this guide is recommending. The practical middle step — and the one most people actually take — is keeping the receiver exactly where it is for switching, decoding, and room correction, and adding one external power amp for just the front three channels, fed from the receiver's pre-outs. The receiver's internal amp keeps driving the surrounds and height channels. You get the benefit where it matters most without replacing a system that's still doing most of its job well.

The real signs it's time to upgrade

• Audible distortion or clipping at movie-reference volume. A harsh, flattened edge on loud passages — explosions, low synth hits — that wasn't there at lower volume is the clearest sign the amp section has run out of clean headroom.
• The receiver goes into protection mode or shuts down during demanding content. This means the internal amp section has hit a thermal or current limit it can't sustain.
• The chassis gets noticeably hot to the touch during extended movie-length sessions, beyond normal warm-to-the-touch operation.
• Your speakers are genuinely demanding: low sensitivity (below about 86dB) or a low nominal impedance (4 ohms or lower) both ask more current of an amplifier than a typical receiver's shared power supply comfortably provides. See our amplifier power guide for how to check your own speakers against this.
• A large or open-plan room where the listening distance is long enough that you need real headroom, not just adequate volume at normal listening levels.

If none of these apply to you, a receiver's built-in amp section is very likely doing its job fine, and separates would be solving a problem you don't actually have.

What separates won't fix

This is where a lot of upgrade budgets get misdirected. None of the following are amplification problems, and a power amp won't move the needle on any of them:

• Wanting more channels. That's a channel-count limitation, not a power limitation — the fix is a receiver or processor with more amplified channels (or, for a lot of channels at once, an amp like our Energy E5 or Energy E7 covering five or seven channels in a single box), not a bigger amp for the channels you already have.
• Wanting better room correction, like Dirac Live. That's a processing feature that lives in the receiver or processor, entirely separate from how the amplification is done. See our room correction guide.
• Wanting more HDMI inputs or full-bandwidth 4K/120 gaming. Both are receiver video specs. Our HDMI 2.1 guide and gaming receiver guide cover what actually matters there.
• A system that sounds quieter than expected at normal volume. Check speaker placement and sensitivity before assuming you need more power — a receiver rated at even 80 watts per channel is plenty for the vast majority of rooms with reasonably efficient speakers.

The real cost math

The instinct is to compare a power amp's price against just buying a beefier receiver instead. That comparison usually favors the bigger receiver on paper — but it's worth being honest about what it actually buys you. Stepping from our step-up receiver pick up to our enthusiast pick gains you real channels and features, but the amplifier section is still one shared power supply and one shared chassis doing more work, not a fundamentally different category of headroom.

A dedicated amp like the Aperion Energy Pro E3H costs more outright than the gap between those two receiver tiers, but it's putting out 600 watts per channel into 8 ohms with nothing else sharing its power supply or thermal budget — genuinely different territory than any receiver's built-in amp section, regardless of price tier. The question isn't which option is cheaper in isolation; it's whether you actually need that different category of headroom, per the signs above.

Which channels to upgrade first

The front left, center, and right almost always come first, and it's not close. As we cover in can you mix speaker brands, these three channels carry the vast majority of a movie's dialogue and on-screen sound — it's where extra clean headroom is most audible, and where a receiver's amp section is working hardest during a typical movie. Surrounds and height channels play a smaller, more atmospheric role and are a lower priority for a dedicated amp.

Our full amplifier lineup is organized around exactly this decision — a 2-channel amp for just the front L/R, a 3-channel amp for a full L/C/R front stage, and 5 or 7-channel options if you want to take the receiver's amp section out of the picture almost entirely.

A practical example from our own system

This is exactly the upgrade we made ourselves: the Aperion Energy Pro E3H now runs our own front three channels, fed from the receiver's pre-outs, while the receiver keeps handling decoding, switching, and the remaining channels. The difference showed up as a noticeably wider soundstage — more separation between voices and effects — exactly the kind of improvement that shows up when the front three, specifically, stop sharing a power supply with everything else the receiver is doing. See the full write-up for the specifics.

Quick reference

Frequently asked questions