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e C T i o n

2 . 1 — r

o o m

C o u s T i C s

W i l s o n A u d i o S p e c i a l t i e s

Section 2.1—Room Acoustics

You are surely excited about setting up your Alexandria XLF loudspeakers and do-

ing some listening, but before you begin, we would like to discuss some of the important

room acoustical information that will help you set up your loudspeakers properly.

Final Listening Room Setup (Voicing)

For a speaker system its size, the Alexandria XLF is unmatched in its ability to repro-

duce the musical event. It is truly state of the art. However, room acoustics and boundary

interactions affect the sound of a loudspeaker to such a large degree that poor setup can

seriously degrade your enjoyment of even the finest loudspeaker.

Therefore, we offer the following section, which will present some guidelines on

room acoustics and their interactions with loudspeakers. While we will also outline some

detailed suggestions on the setup of the Alexandrias, we strongly suggest that you have

your local Wilson Audio dealer perform the final speaker “voicing” with you. Wilson

dealers are specially trained in setting up Wilson loudspeakers and will ensure that you

realize the full value of your purchase.

Zone of Neutrality

The “Zone of Neutrality” is an area in your room where the speakers will sound

most natural. This location is where the speakers interact the least with adjacent room

boundaries. It is important to have a clear working space while determining the Zone of

Neutrality.

The following is a simple method to locate the Zone of Neutrality within your listen-

ing environment:

Stand against the wall BEHIND the location where you intend to position
your Alexandrias. Speaking in a moderately loud voice and at a constant
volume, project your voice out into the room. Your voice will have an

Содержание Alexandria XLF

Страница 1: ...A l e x a n d r i a X L F O w n e r s M a n u a l...

Страница 2: ......

Страница 3: ...o u s t i c s 1 9 F i n a l L i s t e n i n g R o o m S e t u p V o i c i n g 1 9 Z o n e o f N e u t r a l i t y 1 9 S e c t i o n 2 2 R o o m R e f l e c t i o n s 2 1 S l a p E c h o 2 1 S t a n d...

Страница 4: ...a y P l a t e 4 4 S e c t i o n 4 2 G e o m e t r i c T i m e D o m a i n A l i g n m e n t 4 5 M a t e r i a l s R e q u i r e d 4 5 P r o p a g a t i o n D e l a y A l i g n m e n t 4 6 R o o m S e...

Страница 5: ...d j u s t i n g t h e XLF p o r t 6 2 C h o o s i n g a P o r t C o n f i g u r a t i o n 6 2 I n s t a ll i n g t h e P o r t P l u g 6 3 S e c t i o n 4 1 2 B r e a k i n P e r i o d 6 4 S e c t i...

Страница 6: ...t T a b l e 8 6 H i g h F r e q u e n c y M o d u l e T e t h e r B o l t T a b l e 8 7 U p p e r M i d r a n g e M o d u l e T e t h e r B o l t T a b l e 8 8 S e c t i o n 9 W a r r a n t y I n f o...

Страница 7: ...S e c t i o n 1 I n t r o d u c t i o n S e c t i o n 1 I n t r o d u c t i o n...

Страница 8: ......

Страница 9: ...e baffle is constructed from Wilson s proprietary S material Re tuned crossovers and a host of parts each included as a result of exhaustive experimen tation and punctilious listening trials The Alexa...

Страница 10: ...the characteristics of the sound room Since the system is completely passive it avoids the sonic pitfalls symptomatic to all active bass manage ment systems The Cross Load Firing port System on the A...

Страница 11: ...s wing structure which supports the midrange and tweeter modules in the upper array is critical to the design for several reasons It provides the infrastructure that facilitates the precise aspherical...

Страница 12: ...nt tweeter was developed to play down to the one kilohertz region with low distortion and high power handling ability Dave has been willing to trade ultra wide bandwidth for these more musically impor...

Страница 13: ...onships With current technology no single transducer can reproduce the full range of music at realistic sound pressure levels while maintaining consistent dispersion The solution is the multiple drive...

Страница 14: ...d by large speaker systems Typical of the creative process the solution itself came as a metaphor or rather an analogy to the field of optics and the design of wide angle lenses The means of maintaini...

Страница 15: ...ment in realism wrought by Alexandria XLF is delightfully revolutionary Figure 2 Alexandria s Modules Move Aspherically to Correct Propagation Delay Figure 2b Aspherical Propagation Delay optimizes dr...

Страница 16: ...A l e x a n d r i a XL F O w n e r s M a n u a l 16 Wi l s o n A u d i o S p e c i a l t i e s...

Страница 17: ...S e c t i o n 2 I n Yo u r R o o m...

Страница 18: ......

Страница 19: ...uidelines on room acoustics and their interactions with loudspeakers While we will also outline some detailed suggestions on the setup of the Alexandrias we strongly suggest that you have your local W...

Страница 20: ...room the zone in most rooms begins between two and a half to three feet from the rear wall 4 Continue to walk slowly away from the rear wall After some distance usually one to two feet past the first...

Страница 21: ...for the other loudspeaker you will now have two rectangles one on the floor on either side of the room Note The more reflective or live sounding the room is the more difficult it will be to detect the...

Страница 22: ...g time domain smearing energy It destroys the delicate phase relationships which help to establish an ac curate soundstage Slap echo see Figure 3 is a common acoustical problem in the typical domestic...

Страница 23: ...in quite large rooms Sound absorbent materials such as described above will alter the tonal characteristic of the room by making it sound deader less bright and alive and quieter These changes usuall...

Страница 24: ...o occur at a lower frequency Absorbent materials such as Illbruck Sonex are ineffec tive at controlling reflections in the bass region Moving speakers about slightly in the room is for most people the...

Страница 25: ...ayed reflected sound At certain frequencies cancellation occurs because the reflected sound lags in phase rela tive to the direct sound This cancellation is most apparent where the two frequencies are...

Страница 26: ...esonances generally occur in the low to mid bass frequencies and add a false fullness to the tonal balance They too are more prominent at louder levels but their contribution to the sound of the speak...

Страница 27: ...uencies are dependent on room size and dimension There are three basic shapes for most rooms square rectangular and L shaped see Figure 4 A perfectly square room is the most difficult room in which to...

Страница 28: ...t up along the primary lon gest leg of the room They should fire from the end of the leg short wall toward the L or they should be along the longest wall In this way both speakers are firing the same...

Страница 29: ...kers The listening position should ideally be no more than 1 1 to 1 25 times the distance between the tweeters on each speaker Therefore in a long rectan gular room of 12 x 18 if the speaker tweeters...

Страница 30: ...ll as a deterioration of upper bass quality You must find the proper balance of these two factors but remember if you are partial to bass response or air and bloom do not overcompensate your adjustmen...

Страница 31: ...e the surface of the inner side of the Alexandria as he she faces the speaker It is recommended that a distance of two to three feet and possibly more be maintained between the Alexandria and the rear...

Страница 32: ...Wi l s o n A u d i o S p e c i a l t i e s...

Страница 33: ...S e c t i o n 3 I n i t i a l S e t u p...

Страница 34: ......

Страница 35: ...e to be assembled This will avoid clutter in the work area that can result in damage to your loudspeakers Section 3 1 Uncrating the Alexandria Initial Check The Alexandria is shipped in seven wooden c...

Страница 36: ...woofer module 3 Remove the packing material from between the casters and set the crate up so that the casters on the woofer are toward the floor 4 While one person holds the crate the other person sh...

Страница 37: ...l the sides of the crate apart 4 Because the wing array is extremely heavy use two strong people to carefully lift the wing array out of the crate 5 Locate the serial plate on the underside of the low...

Страница 38: ...e very careful in unpacking the remaining modules to avoid chipping the finish 2 Stage these items away from traffic flow 3 Remove the empty crates from the room Uncrating the Crossover Cover Locate t...

Страница 39: ...t channel 2 Lower midrange modules left right channel 2 High frequency modules left right channel 2 Upper midrange modules left right channel 2 Wing Arrays left right channel 8 3 8 16 x 1 5 set screws...

Страница 40: ...gnment plate during shipment 8 20 x 1 Socket head screws installed with alignment plate 24 10 32 x 1 Button head screws 24 10 x 438 Washer 8 1 4 Lock washers 2 XLF Port Plug 2 Aluminum Port Cover 2 XL...

Страница 41: ...S e c t i o n 4 F i n a l S e t u p...

Страница 42: ......

Страница 43: ...ars of experience and should be followed closely First place the woofer modules in the Zone of Neutrality as determined by the pro cedure outlined in Section 2 1 Final setup and tuning will follow the...

Страница 44: ...ding woofer module Carefully lower the wing onto the woofer module Locate six 1 4 inch diameter 1 1 2 hex head screws Using supplied ratchet attach wing assembly to woofer see Fig ure 11 Re attach Pro...

Страница 45: ...elay alignment plate Secure the plate with the four 10 32 x 1 screws placing the metal wash ers beneath each screw Repeat the above process for the other channel Section 4 2 Geometric Time Domain Alig...

Страница 46: ...lexandria system allows for different listening dis tances away from the speakers and listening ear heights measured distances from the floor to your ear For each distance ear height combination there...

Страница 47: ...nformation for positioning each module in the array determined by the indent in which the rear spike rests The table also contains information on the appropriate length spike to be used in the rear of...

Страница 48: ...cifies the appropriate Tether Bolt length 7 Make a mark on the Rear Spike Length tables indicating the proper rear spike for each module 8 Note The shortest spikes labeled A are always used at the fro...

Страница 49: ...The front to back location of each mod ule along with the use of the proper length of rear spike of the upper modules achieves the correct propagation delay and axial response vis vis the listener Ins...

Страница 50: ...d set the front two spikes on top of the LMRM enclosure Align the spikes into the alignment tracks Install the rear spike by lifting the rear of the HFM and carefully screwing it in Refer to the Propa...

Страница 51: ...that they can be easily attached to their appropriate module This is ac complished as follows Locate the cable marked Lower Mid Dress this cable through the handle opening and connect this cable to t...

Страница 52: ...below the speaker terminal see Figure 18 Locate the cable marked Rear Tweeter Locate the binding post on the rear of the upper midrange module labeled Rear Tweeter Carefully thread the speaker cable...

Страница 53: ...odules Materials Required Refer to Identification of Alignment Spikes and Tether Bolts in Section 4 1 under Geometric Time Domain Alignment to ensure that you have the proper length tether bolts for e...

Страница 54: ...dule LMRM 2 Tether bolts for each loudspeaker s high frequency modules HFM 2 Tether bolt cap for each loudspeaker s high frequency modules HFM 2 Tether bolts for each loudspeaker s upper midrange modu...

Страница 55: ...lignment spike is still placed properly in its numbered detent Symmetrically hand tighten the tether cap nuts Using the same process insert and symmetrically tighten the tether cap nuts for the tweete...

Страница 56: ...20 Place the assemblies out of the traffic pat tern until they are needed during the installation Section 4 7 Using the Lift to Install Spikes Materials Required Note This is a two person job Do not a...

Страница 57: ...Procedure Slide the Wilson Audio Jack under the front of the Alexandria centered be tween the casters so that the jack s lift bolt is exposed Place the lift plate so it is positioned about an inch beh...

Страница 58: ...spike will go into a different hole than the caster With one person stabilizing the Alexandria lower the Alexandria by turn ing the jack counterclockwise Note that the Alexandria will now sit lower in...

Страница 59: ...A u d i o S p e c i a l t i e s floor If the bubble is leaning toward the outside of the room you will have to lengthen one of the outside spikes down toward the floor You may rotate the spike tips in...

Страница 60: ...s that the speak er is leaning toward the back of the room behind the loudspeakers you will have to lengthen the rear spikes down toward the floor Section 4 8 Expansion Spikes Place one end of the exp...

Страница 61: ...ilson Audio replacement resistors should be used in your Alexandrias Changing the value or brand of resistor will have a delete rious affect on the sonic per formance of your loudspeak ers and may voi...

Страница 62: ...ia s woofers couple to the amplifier These resistors should not be changed by the user Section 4 11 Adjusting the XLF port Choosing a Port Configuration Below 30 60 Hz depending on room the bass will...

Страница 63: ...h the XLF s port in the rear firing configura tion The XLF system will often replace a Series 1 or 2 Alexandria X 2 If the bass perfor mance in these installation is optimal start off with the forward...

Страница 64: ...to the front of the loudspeaker 8 Reverse the process to change the location of the port Section 4 12 Break in Period All audio equipment will sound its best after its components have been broken in...

Страница 65: ...S e c t i o n 5 C a r e o f t h e A l e x a n d r i a...

Страница 66: ......

Страница 67: ...of protective film over the finish With the exception of the upper modules which should be de frisked upon initial installation we rec ommend that this film be left in place un til the speakers are i...

Страница 68: ...circumstances Consult your dealer for further information if required To maintain the high luster of the finish periodic polishing may be desired over the years We recommend a nonabrasive carnauba bas...

Страница 69: ...dards for its use while offering very tight tolerances high hardness uniform density and dimensional stability In the construction of the Alexandria XLF Wilson Audio uses two types of composites dubbe...

Страница 70: ...atched performance The Alexandria XLF s upper and lower cabinet modules have been designed to eliminate vibration and cabinet signature while maintaining an internal acoustical integrity Wilson s exha...

Страница 71: ...S e c t i o n 6 T r o u b l e s h o o t i n g S e c t i o n 6 T r o u b l e s h o o t i n g...

Страница 72: ......

Страница 73: ...v e r i s n o t w o r k i n g o r i s o u t o f p h a s e t h e A l e x a n d r i a w i l l n o t i m a g e p r o p e r l y D o u b l e c h e c k y o u r c o n n e c t i o n s f o r r e d t o r e d a...

Страница 74: ...t o t h e c h a n n e l a t a l o w l e v e l Th e d r i v e r s h o u l d n o w b e o p e r a t i n g c o r r e c t l y C h e c k t o s e e i f y o u r s p e a k e r c a b l e s a r e p r o p e r l...

Страница 75: ...o u t l e t D i s c o n n e c t t h e s p e a k e r c a b l e l e a d s t o t h e a m p l i f i e r a n d t u r n t h e a m p l i f i e r o n a g a i n Yo u h av e a s h o r t i n y o u r s p e a k e...

Страница 76: ...Wi l s o n A u d i o S p e c i a l t i e s...

Страница 77: ...S e c t i o n 7 S p e c i f i c a t i o n s S e c t i o n 7 S p e c i f i c a t i o n s...

Страница 78: ......

Страница 79: ...Overall Dimensions System Weight Per Channel Total System Shipping Weight approx XLF port adjustable rear or front firing Rear Vented Sealed One 13 inch 33 0 cm One 15 inch 38 1 cm Two 7 inch 17 78 c...

Страница 80: ...A l e x a n d r i a XLF O w n e r s M a n u a l 80 Wi l s o n A u d i o S p e c i a l t i e s Section 7 2 Figure 27 Alexandria XLF Dimensions...

Страница 81: ...S e c t i o n 8 A l i g n m e n t Ta b l e s...

Страница 82: ......

Страница 83: ...B B B B B 48 n a n a B B B B B B B B B B Ear Height 8 9 10 11 12 14 16 18 20 22 24 26 36 n a n a n a 18 18 18 18 18 18 17 17 17 38 n a 17 17 17 17 17 17 17 17 17 17 17 40 15 15 15 16 16 16 16 16 16 1...

Страница 84: ...D C C 48 n a n a D D D D D C C C C C Ear Height 8 9 10 11 12 14 16 18 20 22 24 26 36 n a n a n a 28 27 27 26 25 25 25 25 24 38 n a 27 26 26 26 25 25 24 24 24 24 23 40 24 24 24 24 24 23 23 23 23 23 23...

Страница 85: ...11 12 14 16 18 20 22 24 26 36 n a n a n a 29 28 26 24 23 22 22 21 20 38 n a 28 27 26 25 23 22 21 21 20 20 19 40 25 24 23 23 22 21 20 20 19 18 18 18 42 21 21 20 20 19 19 18 18 17 17 17 16 44 17 17 17...

Страница 86: ...A l e x a n d r i a XL F O w n e r s M a n u a l 86 Wi l s o n A u d i o S p e c i a l t i e s Lower Midrange Module Tether Bolt Table...

Страница 87: ...H i g h F r e q u e n cy M o d u l e T e t h e r B o l t T a b l e 87 Wi l s o n A u d i o S p e c i a l t i e s High Frequency Module Tether Bolt Table...

Страница 88: ...A l e x a n d r i a XL F O w n e r s M a n u a l 88 Wi l s o n A u d i o S p e c i a l t i e s Upper Midrange Module Tether Bolt Table...

Страница 89: ...S e c t i o n 9 Wa r r a n t y I n f o r m a t i o n...

Страница 90: ......

Страница 91: ...ed by the Wilson Audio dealer that sold the product to the customer FAILURE TO COMPLY WITH EITHER REQUIREMENT NO 1 OR REQUIREMENT NO 2 WILL RESULT IN THE WARRANTY PERIOD BEING LIMITED TO A PERIOD OF 9...

Страница 92: ...service or repair of the product without charge for parts or labor which ser vice or repair at the Dealer s option shall take place either at the location where the product is installed or at the Dea...

Страница 93: ...if the product had originally been bought for immediate resale to the retail customer Wilson Audio products are warranted for a period of 90 days unless extended to 5 years as provided above by return...

Страница 94: ...A l e x a n d r i a XL F O w n e r s M a n u a l 94 Wi l s o n A u d i o S p e c i a l t i e s...

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