To set up a home theater, place the TV and front speakers first, angle the surrounds around your main seat, connect every source through the receiver or the TV’s HDMI eARC port, then run the receiver’s microphone calibration. Planning the room before buying gear saves most of the frustration.
Planning the room before you buy home theater gear
Start with the seat, not the screen. Pick the main listening position, ideally centered on the TV and not pushed against the back wall, and build the layout around it. Check the TV maker’s guidance on viewing distance for your screen size, and sit in that spot to judge how big the picture feels.
Note where outlets, windows and doorways are, since they limit where speakers and cables can go. Hard, bare rooms echo, so rugs, curtains and upholstered furniture help dialogue sound clearer. Decide early whether wires will run along baseboards, under rugs or through walls, because that decision shapes which speakers make sense.
Measure the room and sketch it on paper, marking the seat, the screen and every obstacle. A rough drawing makes speaker angles much easier to work out before you drill any holes.
Speaker angles for a 5.1 surround layout
A 5.1 system uses front left, center, front right, two surrounds and a subwoofer. Angles are measured from your main seat, with the TV directly in front at zero degrees. The figures below come from Denon’s receiver manual for its receivers.
| Speaker | Where it goes |
|---|---|
| Front left and right | 22 to 30 degrees to each side of center |
| Center | Between the fronts, directly above or below the TV |
| Surround left and right | 90 to 110 degrees, beside or slightly behind the seat |
| Surround back (7.1 only) | 135 to 150 degrees, behind the seat |
| Subwoofer | Near the front speakers, wherever bass sounds even |
Aim the tweeters at ear height when seated where you can, and point every speaker toward the main seat. For height or overhead speakers, follow the placement diagram in your receiver’s manual.
Connecting the TV, receiver and sources
- Plug streaming boxes, game consoles and disc players into the receiver’s HDMI inputs.
- Run one HDMI cable from the receiver’s output to the TV input labeled ARC or eARC.
- If your sources plug into the TV instead, the eARC connection sends their audio back to the receiver.
- Connect speaker wire, matching red to positive and black to negative at both ends so the speakers stay in phase.
- Run a subwoofer cable from the receiver’s sub or LFE output to the subwoofer’s input.
- In the TV’s sound settings, choose the HDMI or receiver output and turn off the TV speakers.
eARC is the newer version of the audio return channel and is built to carry more advanced audio formats than original ARC, so use that port when both devices have it.
Running the receiver’s calibration microphone
Most AV receivers ship with a small microphone and an automatic setup routine. It plays test tones through each speaker, then sets speaker size, distance and level and often applies room correction.
Place the mic at ear height at your main seat, on a tripod or a stack of books rather than a soft cushion. Keep the room quiet, since fans and conversation skew the readings, and measure extra positions if the receiver asks. Afterward, check that every speaker was detected and the subwoofer level isn’t overpowering dialogue. If you later move furniture or add a large rug, run the calibration again, since the room’s sound changes with it.
Soundbar setups for smaller rooms
A soundbar is the simpler route when a room can’t fit five speakers. Connect it to the TV’s eARC or ARC port with an HDMI cable, turn on the TV setting often called HDMI control or CEC so one remote works both, and set TV audio output to the soundbar. Many soundbars can add a wireless subwoofer and rear speakers later, which gets you closer to real surround without speaker wire. Check which add-ons a model supports before you buy it.
Frequently asked questions
Do I need a receiver for a home theater?
You need something to decode and power the speakers. A traditional setup uses an AV receiver with passive speakers, while a soundbar or powered speaker system builds the amplification in. Receivers offer more flexibility and upgrade paths, and soundbars are simpler and take less space.
Where should the subwoofer go?
Start near the front speakers, then try the subwoofer crawl. Put the sub at your seat, play bass-heavy content, and crawl around the front of the room listening for the spot where bass sounds most even. Place the sub there and rerun the receiver's calibration.
What does 5.1 or 7.1.2 mean?
The first number counts the regular speakers, the second counts subwoofers, and a third number, when present, counts height or overhead speakers used for formats like Dolby Atmos. So 7.1.2 means seven ear-level speakers, one subwoofer and two height speakers.
How do you connect TV sound to a home theater without HDMI?
Use an optical digital audio cable. Run it from the TV's optical audio output to the receiver's optical input, then set the TV's sound output to that connection and turn off the TV speakers. Denon's receiver manual recommends this optical link for TVs that lack HDMI ARC or eARC.
How do you hide surround sound wires?
Plan the routes before you mount anything. Run wire along baseboards under paintable cord covers, tuck flat speaker wire under a rug, or fish it through walls and ceilings for a fully hidden look. Many soundbars can add wireless rear speakers instead, which avoids running wire across the room.
