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Large room · 14 × 18 × 9 ft

The 14 × 18 home theater

Space for two rows, 7.1.4 Atmos, and a 100 to 110 inch projection screen. A serious theater without being a basement build.

Recommended layout: 7.1.4 Atmos

Alternative: 5.1.4

The full experience: 7.1 plus four overhead speakers.

SCREEN14 ft wide18 ft longSEATLRCSLSRRLRRTFLTFRTRLTRRSUBSUB2

Main seat

11.2 ft

from the screen wall (62%)

Viewing distance

10 ft 2 in

eyes to screen

TV size

97"

91–102" is cinematic

Max projector screen

100"

lens 9 ft 5 in–14 ft 6 in back

First room mode

31 Hz

length axis

Volume

2268 cu ft

closest to Louden A

Display

Projection wins here: a 100 to 110 inch screen puts the first row at a THX-grade angle, and up to 120 inches if you like the front-row feel. A 98 inch TV is the flat-panel alternative.

Seating

Two rows: four seats on a 12 inch riser behind three in front. First row about 11 feet from the screen.

Speaker measurements

From the left wall, from the front wall, and floor to tweeter. Angles are from the main seat.

SpeakerLeft wallFront wallHeightAngle
Front Left2.3 ft1 ft3.3 ft25°
Front Right11.7 ft1 ft3.3 ft25°
Center7 ft1 ft2.8 ft
Surround Left1 ft11.7 ft4.8 ft95°
Surround Right13 ft11.7 ft4.8 ft95°
Rear Surround Left3.6 ft17 ft4.8 ft150°
Rear Surround Right10.4 ft17 ft4.8 ft150°
Top Front Left3.7 ft5.4 ft9 ft30° / 41° up
Top Front Right10.3 ft5.4 ft9 ft30° / 41° up
Top Rear Left3.7 ft16.9 ft9 ft150° / 41° up
Top Rear Right10.3 ft16.9 ft9 ft150° / 41° up
Subwoofer3.5 ft1 ft0.8 ftn/a
Subwoofer 210.5 ft1 ft0.8 ftn/a

What to expect in this room

  • Rear surrounds need at least 3 ft behind the back row; the 18 ft length gives you that.
  • Four in-ceiling Atmos speakers at 45° ahead of and behind the main row.
  • Budget for a 9 or 11 channel receiver, or a 7 channel receiver with pre-outs and an external amp.
  • Two subwoofers at the front-wall quarter points (or opposing mid-walls) even out bass between seats. Run the subwoofer crawl to confirm.
  • length and height are close to a 2:1 ratio: every mode of the shorter dimension lands on a mode of the longer one.
  • 6 pair(s) of axial modes below 200 Hz coincide within 5%. Expect a strong peak at those frequencies.

Gear that fits this room

All categories

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Polk Audio Signature Elite ES20

Surrounds or a small-room stereo pair on a budget

Polk Audio Signature Elite ES20

Price tier 1 of 4
  • 2-way bookshelf, 6.5" woofer
  • 1" Terylene dome tweeter
  • 88 dB measured sensitivity
  • Bass to ~35 Hz in-room (ASR)

Audio Science Review measured genuinely deep bass and smooth, wide horizontal dispersion, and recommended it outright at its price. That wide dispersion and easy load make it a good surround or small-room front pair.

Polk Audio Reserve R700

Front left/right in medium to large rooms

Polk Audio Reserve R700

Price tier 3 of 4
  • 3-way tower, dual 8" woofers + 6.5" mid
  • 1" Pinnacle ring radiator tweeter
  • 88 dB sensitivity, 8 ohm nominal
  • 38 Hz (-3 dB), ported

A three-way tower that measured within roughly plus or minus 2 dB on-axis at Erin's Audio Corner with real bass extension to about 40 Hz, so it can play full range in a medium room. It shares drivers with Polk's flagship Legend series at a fraction of the price.

SVS SB-1000 Pro

Small rooms and music-focused systems

SVS SB-1000 Pro

Price tier 2 of 4
  • 12" driver, sealed
  • 325 W RMS / 820 W peak
  • 20 Hz to 270 Hz (+/-3 dB)
  • SVS app with 3-band PEQ

A compact 13-inch sealed cube that Audioholics found goes well beyond entry-level performance, with app control, parametric EQ, and clean 20 Hz extension. The natural pick for small rooms, music-first systems, or a pair on a budget.

Denon AVR-S670H

Basic 5.1 rooms and apartments

Denon AVR-S670H

Price tier 2 of 4
  • 5.2 channels, 75 W/ch
  • 3 of 6 HDMI inputs 8K/4K120
  • Audyssey MultEQ
  • Dual sub outs, no pre-outs

The least expensive Denon with current HDMI 2.1 gaming support and HEOS streaming. It is a sensible starting point for a straight 5.1 room, but it has no height channels and no pre-outs, so it cannot grow into Atmos.