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Speaker Placement Setup Tips
Having the best speakers can only take you so far. Setting the speakers up properly can be arguably being the most important part of the system. So much so that even mediocre speaker system that has been properly setup can sound extremely impressive and have a good imaging that can sound better than expensive speakers that haven’t been setup correctly.
Here is a list of items you will need to do this correctly:
- 1 Radio Shack (analog preferred) SPL meter
- 1 25ft tape measure
- 1 pen type laser pointer (string and a helper or two)
- 1 pair of rubber pie shaped door stops (Home Depot)
- 1 package small square rubber stick-on feet (Home Depot)
Step 1: Center Speaker Positioning
First stick two rubber feet on the bottom front of your center speaker. Then place the pie shaped doorstops under the back of the center so the back is angled down toward the listening position. Next, place the laser pointer on the top of the center speaker pointed at the listening position. Then aim and adjust the beam of the laser pointer so it is just above the ear level at the listening position. Adjust the rubber door stops until the correct height is obtained. This effectively aims the tweeter at the listening position between your ears.
Step 2: Main Speakers Positioning
Position your front main speakers at least a foot off each back and side wall and you are close to the “Golden Triangle Rule” ( Example: speakers 8ft apart from listening position and 8 ft back). Make sure that the speakers are the same distance off the back wall with the tape measure, then place the laser pointer on the inside panel of the speaker enclosure at the height of the tweeter.
With the laser pointer beam active, rotate the speaker inward until the laser pointer beam is about 6" away (outside) from the center of your listening position. This will effectively toe in the speaker to a close position according to the dispersion patterns of your speakers. If your speakers have an unusually wide dispersion pattern, you may wish to experiment with the degree of toe in for optimal performance.
Step 3: Surround Sound Speakers Positioning
Bipolar/Dipole surrounds usually perform best when placed on the side walls directly across or slightly behind the seated listening position and at approximately 18-28" above the seated ear level position.
Quadpolar surrounds, similar to Bipoles, usually perform best when placed on sidewalls, but closer to the backwalls, for rear wall reflection of the side mounted tweeter. Their height should be about 4-6 feet above the seated position, but greater than 1 foot away from the ceiling to not obscure the top mounted woofer.
Direct Radiating surrounds usually perform best when placed behind and slightly higher than the listening position, spread apart the same distance as the mains and slightly toed in.
Step 4: Subwoofer Positioning
Subwoofer placement is adequately covered in our article: Crawling for Bass.
Step 5: Speaker Configuration Set-Up In The A/V Receiver
Enter the setup menu of the Denon AVR-2802, or any modern Surround Sound Receiver, and select all speakers set to small and subwoofer crossover to 80 Hz. Set the crossover on the Subwoofer to its maximum position or if it has a crossover bypass select bypass. Next, use the tape measure to accurately enter the feet or meters your speakers are from the listening position.
Step 6: Checking the Phase of the Speaker System
A) Electrical Phase
Make sure all your speakers are in electrical phase (positive from amp to positive to speaker, negative from amp to negative to speaker). A speaker system out of phase will defeat your calibration and may result in poor imaging, bass response, or both.
B) Acoustical Phase
Next check to see if your main speakers and subwoofer are in acoustical phase by sweeping a test tone from 20Hz to 100Hz using a popular set-up disc such as Avia or THX. Listen for any nulls or bumps in the frequency response. The bass response should sound smooth and uniform throughout the entire swept frequency range. If it doesn’t try setting the phase switch on your subwoofer to 180 degrees, or if the phase feature is a rotary dial, rotate it in 20 degree steps and listen for the bass to smooth out between the mains and subwoofer. If this still doesn’t solve the problem, set the phase on the subwoofer back to the 0 position, and vary the subwoofer distance in the Receiver set-up menu ± a few feet until it does. You may need to experiment between these suggestions and the placement suggestions for your subwoofer previously mentioned in Step 4. Be patient, it is worth the extra time now as it’s a one time investment to ensure great sound.
Step 7 Sound Pressure Level (SPL) Calibration
Place the SPL Meter at the listening position at ear level with the Mic end pointed toward the ceiling. Select “C” weighting, response slow then, turn the dB dial to 70. Activate the internal pink noise generator of your Receiver and select manual test tone. Now adjust each speaker to +75 dB reference. When you are adjusting the surrounds make sure your body is not in a direct path of the speaker and make sure the house is quiet. When doing the calibration, only the test tone should be heard (A/C, ceiling fans, ect. should be turned off). I like to adjust the subwoofer level to + 80dB for wow effect. Your taste may vary.
Step 8 Enjoy!
Put in a good flick with lots of hard simultaneous pans and dialog, and plenty of dynamic swings.
“Contact” Lift off chapter or “The Phantom Menace” Pod race, or “U571” Depth Charges, work well.
IF YOU DON’T SAY WOW AFTER THE VIEWING START OVER!