Surround
Building a surround system, one speaker at a time
A surround system is the one purchase here that can be made in pieces, and doing so is usually better than buying a package. This guide is the order the channels earn their place, with the trap that catches most first-time buyers: a speaker package and a system are not the same product. Every pick below had an Amazon.com offer on October 25, 2026.
By Jean-Benoit Buisson
In brief
The order in which channels earn their place — and why a "5.1 package" usually needs an amplifier you have not bought. A receiver and speakers sold in the US. Our picks: Denon AVR-X1800H ($849), Polk Audio Monitor XT35 center speaker ($260), Polk Audio Monitor XT70 floorstanding speaker ($349), Polk Audio Monitor XT15 ($179), Klipsch R-12SW active subwoofer ($259) — prices on Amazon.com on October 25, 2026.
1. The receiver, because everything plugs into it
The Denon AVR-X1800H — the US version of the AVR-X1800HDAB reviewed here, without the European DAB tuner — is a 7.2 receiver with Dolby Atmos, from a maker that states power with the conditions it was measured under ($849 on Amazon.com on October 25, 2026). Seven channels drive a 5.1 system now and a 5.1.2 one later. Count the HDMI inputs you need and add one — running out is why people replace a receiver that still sounds fine.
2. The center, because dialogue lives there
The Polk Audio Monitor XT35 ($260) comes from a range that also has floorstanders, bookshelf speakers and height modules, which is the point: a system built inside one range can grow without its voices changing tone.
3. The front pair
Polk’s Monitor XT70 towers ($349) state 89 dB sensitivity, 35 Hz to 40 kHz and a 25 to 200 W amplifier range, with two 8 in passive radiators instead of a port — so they are less fussy about the wall behind them than a rear-ported tower.
4. The surrounds
The Polk Audio Monitor XT15 ($179) is the same range in a bookshelf speaker that Polk states for surround or rear use, with a 1 in tweeter and 4 and 8 ohm compatibility. Put them beside or slightly behind the seats, about 1 to 2 ft above ear height. Placement beats size in this position. (Wireless rears such as the Bose Surround Speakers connect only to a Bose soundbar, not to a receiver.)
5. The subwoofer
The Klipsch R-12SW ($259), with a 12 in front-firing driver, an LFE input and a stated 29–120 Hz response, positioned before it is upgraded. Moving it three feet changes its output at your seat more than a better model would.
What to do after the last box
Run the receiver’s room correction properly — microphone at seated ear height, at the actual seat, room quiet. It sets distances, levels and crossovers in one pass, and those three are what an untuned system gets most wrong.
Prices quoted in this text were read on October 25, 2026. The live price is at the top of the page.
What gets asked most
Does a "5.1 package" include an amplifier?
Usually not. Most are passive speakers only, and the receiver is the missing half — and the more expensive half. Comparing a package price to a soundbar price compares half a system to a whole one.
Do the speakers have to match?
The front three should. Timbre matching means a voice moving across the screen stays the same voice, and it is easiest to get right by staying inside one range. Surrounds and heights can differ with less consequence.
What should I buy first?
The front left and right speakers, then the center. Those three do most of the work in any film system.
How important is the center speaker?
Most dialogue comes from it, so in a film system it is arguably the most important single speaker you own.
Are surround speakers worth it?
They add atmosphere and the least overall improvement. They are the last thing to buy, not the first.
Does placement really matter?
More than price does, and it is free. A well-placed modest system comfortably beats a badly placed expensive one.
Should I get a subwoofer in a flat?
Think hard about it. Bass travels through structure and reaches neighbors, which makes it a genuine constraint.
Can I build it in stages?
Yes, and it works well if you follow the order: front pair, center, subwoofer, surrounds. Plan cable routes early.