Can you push speakers against a rear wall or a corner ?
Views 6 Likes Comments Comment
15 August 2006
Can you push loudspeakers against a rear wall or a corner ? Question from eBay member on 14th August 2006 = can it (your speakers) be placed against a wall? many thanks eBay member question = can it be placed against a wall ? Yes, you can push our speakers against a wall but ................. Can you push speakers close to the wall or in a corner of the room ? There has been MANY articles about the problems of pushing speakers against a wall published in SERIOUS Hi Fi magazines about 30 years ago. This is roughly what the SERIOUS Hi Fi magazines said, 30 years ago, slightly updated for DSP (Digital Signal Processing) , etc Some people say that you should push speaker against the wall or a corner of the room. Some people say that you should NEVER push speaker against the wall or a corner of the room, and you should pull the speakers away from the rear wall and corners, and put SMALL speaker on stands, so that SMALL speaker are far away from the floor. Since these are 2 completely different and conflicting recommendations, it will confuse many experts and all beginners ! Ignoring 'over the top' Hi Fi enthusiasts, who will cut a hole in the wall, for the speakers, so that the FRONT of the speaker is FLUSH to the wall, or attach HUGE blocks of sound absorbing wedges (like anechoic chambers) to the rear wall, the CORRECT ADVICE is ........ ALL SERIOUS speakers with GOOD BASS will sound 2 time to 100 time (depending on how fussy you are) better if you pull the speaker away from the wall. If the loudspeaker does NOT have enough bass, and in SHEER DESPERATION to get a bit more bass, you might have to push the speaker against the rear wall. as a DESPERATE LAST RESORT ( if you cannot get bigger speakers with better bass. ) When you push a 'typical' speaker against a rear wall (or corner), you will get VERY UNEVEN bass boost. Some bass frequency will be boosted by HUGE amount ( because of constructive interference, from the 'reflected; sound wave from the rear wall ). Some bass frequency will NOT be boosted. Some UPPER bass frequency might been reduced by a HUGE amount, by 'destructive interference' cause by the reflected UPPER bass from the rear wall. So, you get very UNEVEN 'LUMPY' bass BECAUSE OF THE REAR WALL. Our speakers are SLIGHTLY less affected by this problem, because the woofer (bass speaker) is mounted on the SIDE of the cabinet, so the sound from the EDGE of our woofer (bass speakers) the CENTER of our woofer the OTHER EDGE of our woofer will reach the rear wall (or floor) at DIFFERENT TIME. So, instead of getting a dozen of HUGE bass boost (or destruction) (at different frequencies), you get hundreds of SMALL bass boost (or destruction ) ( at many different frequencies), which is PROBABLY less noticeable, and less irritating. So, if you had to push GBP 600 to GBP 20000 SERIOUS speakers WITH GOOD BASS, against a rear wall, our MODIFIED IN ENGLAND BY LIM AIK LEONG speakers will probably cope better than many of our competitors because 1. side mounted woofer (bass speaker) usually cope better than the 'typical' front mounted woofers (please see explanation above) 2. These MODIFIED IN ENGLAND BY LIM AIK LEONG speakers does NOT have any bass boom. So when you push them against the rear wall, they can still produce acceptable bass for some people (depending on how fussy you are). Some of our competitors speakers with 12 inch woofers or 15 inch woofers or 2 pieces of 6 inch speakers will boom and boom, and invents bass (that isn't there) and will sound 10 times worst, when pushed against a rear wall (or corner) Unfortunately, there is one other problem, caused by pushing speakers against the rear wall, that no amount of intelligent designing by Chinese designers (living in China) or I or any other speaker designers can solve ( without 'over the top' solutions like mounting the speaker in a hole in the wall,) ( or attaching HUGE sound absorbing wedges on the rear wall ) When you shove a speaker against a rear wall, some of the sound will leave the speaker and reach your ears DIRECTLY. Some of the sound will leave the speaker, bounce off the rear wall, and reach your ear, a fraction of a second later. If you have SERIOUS high quality speakers WELL DESIGNED (that need not be expensive), and you are fussy and have Golden Ears, you will hear this problem as a blurred human voice (like talking to somebody in an 'echo-y' bath room, but NOT as severe). If you use to listening to speakers pushed near a rear wall, try pulling the speaker 2 feet away from the rear wall (or corner) AND OFF THE FLOOR (if it is a small speaker), and you will notice the bass disappearing BUT the human voice become MUCH CLEARER, and it is more easy to understand the lyrics of the song. Listen to your speaker pulled 2 feet away from the wall for 2 week, to get used to the human voice. CONCENTRATE on the human voice. Then push the speaker 3 inch near the rear wall and listen to human voices. CONCENTRATE on the human voice, Push the speaker 3 inch nearer the rear wall and listen again. CONCENTRATE on the human voice. As the speaker get nearer and nearer the rear wall, the human voice suddenly becomes blur (and SLIGHTLY echo-y, a LITTLE BIT like talking to somebody in an echo-y bathroom). When the human voice become blur and SLIGHTLY echo-y, pull the speakers 3 inch away (or 6 inch to be absolutely sure) away from the rear wall. Please ignore our competitors absurd claims that some of our competitors speakers are ?designed? to be push against the rear wall and can solve this problem. That is NOT possible. How can you stop the sound leaving the speaker and bouncing off the rear wall, to reach your ears ? Please ignore our competitors absurd claims that 'computerized equalizers' , DSP Digital Signal Processing, and all these fancy high powered computer stuff can solve this 'sound bouncing off the wall' problem, and you can push speakers against the rear wall. This is NOT possible. All this fancy computer DSP equipment can control the AMOUNT of sound leaving the speaker, and they even produce a good frequency response curve, but ........... Computers and equalizers CANNOT stop 'sound bouncing off the rear wall' and reaching your ear a fraction of second later ( 'out of time' with the DIRECT sound from the speaker. ) The CHEAPEST way to reduce the problem of sound 'bouncing off the rear wall' is to pull the speakers away from the rear wall ! Also, most of this fancy equipment use GBP £0.50 (50 pence) 'class B biased' op amp IC Integrated Circuits made in China, Korea, Malaysia, that spoils the sound, with 'Class B' crossover distortion, 'typically' 20 percent overshoot on 10 kilohertz, square wave, etc. Our Hi Fi guide is different to Hi Fi magazines and experts (or dealers pretending to be innocent members of the public) in Internet Forums. If you get 10 people telling you 10 different things, who is right and who is wrong ? Please look at our eBay feedback at http://feedback.ebay.co.uk/ws/eBayISAPI.dll?ViewFeedback&userid=affordablevalvecompany and make up your own mind, about who is right and who is wrong.
Have something to share, create your own guide... Write a guide
Explore more guides