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WOOFER MODULE BINDING POSTS: 
Note that two pairs of binding posts are offered on the woofer module, and are generally connected 
together with the metal straps provided when 

only 

one cable is to be used. These two pairs of binding 

posts on the woofer module enable a “quad” cable hookup for bi-wiring – this setup requires the use 
of the Data-Link.  If you have previously purchased a “quad” biwire cable, with all four conductors 
inside one jacket, the woofer module is where you will connect the four wires. DO NOT USE THE 
METAL STRAPS IN THIS APPLICATION, AS YOU WILL NEGATE THE BENEFITS OF BI-
WIRING.  

If you have not purchased a “quad” bi-wire set, do not plan on using this type of cable -- a twin 
set of separate cables is greatly preferred, due to the lack of mutual conductance from close 
proximity  and  the  elimination  of  the  extra  connections  required of the supplied Data-Link 
jumper cable. 

 
IMPORTANT NOTE: 
The binding posts supplied on the VR-4SR Mk2 are among the finest quality available and can accept 
raw wire, spade lugs, pins, and banana plugs.  According to WBT, the best sounding connection is 
made with raw wire, inserted into the side holes in the binding post shaft.  After listening carefully, 
we concur; solder is not as transparent as a “direct” (raw) wire connection! 
Use a contact enhancing fluid once a month on all RCA plugs and binding posts for best results. 
There will be attendant increases in sweetness, air, soundstage depth, and smoothness equal to an 
upgrade in cables. 
 
Although we have tried almost thirty different brands and types of speaker cables, we can only give 
general recommendations due to the fact that the driving amplifier has as much to do with the type of 
desired  wire  as  the  speakers.  Since  there  are  hundreds,  if  not  thousands  of  available  amp/wire 
combinations, we are not in the position of having heard all of these combinations.  

However, in general, stranded wire usually has a softer, fuller  sound, while solid core wire has  
a tighter and leaner sound.  If you want a “richer” sound, use stranded wire, but if your system 
is too “warm” then use a solid core design to lean it out. 

Please use your VR dealer’s expertise when selecting wires and cables, as he has the experience with 
both the speakers and different amplifiers and can help you make an intelligent selection. Note that 
VSA will not make any amplifier or cable recommendations, this is the function of the dealer. 
 

BI-AMPING THE VR-4SR Mk2 

If the tightest bass is desired, use a solid state amplifier on the woofer modules. If you value “image 
float” and “liquid”-sounding midrange/treble response, use a tube amplifier on the M/T’s. You will 

not

 need an outboard electronic crossover, since the crossovers in the speakers will still continue to 

work. Although it is true that louder  treble output can be obtained by high-pass filtering the tube amp, 
the loss of transparency is usually not worth it. The clean volume obtainable without a high-pass 
crossover will be usually satisfying for anyone but a metal head. (Note: if you are a metal head, 
welcome to high-end audio!) You will need a preamp that has twin outputs, but if you have only one 
set, use high quality Y-jacks available from your high-end dealer. 

Summary of Contents for VR-4SR Mk2

Page 1: ... IO O W WO OR RL LD D C CL LA AS SS S S SP PE EA AK KE ER R S SY YS ST TE EM MS S F FO OR R A AU UD DI IO O A AN ND D H HO OM ME E T TH HE EA AT TE ER R V VR R 4 4S SR R M MK K2 2 I IN NS ST TR RU UC CT TI IO ON N M MA AN NU UA AL L Released October 2007 ...

Page 2: ...ser performer and producer s intent In order to fully benefit from the VR 4SR Mk2 s powerful magic please read the following instructions thoroughly Although the VR series may appear to be conventional speakers they have been designed to work with the listening room Being a Room Interactive design there are certain setup procedures which must be followed The VR series are engineered to replicate t...

Page 3: ...the speaker depends on free movement you may notice a slight brightness in the midrange treble area and mechanical heaviness in the bass for the first 100 hours The sound engineered into the VR s will take approximately 100 300 hours to achieve so we recommend that you not make a critical judgment of their sound until break in is accomplished Break in is best done by playing loud rock or jazz musi...

Page 4: ...ecessary for realistic sound reproduction ROOM CONFIGURATIONS If you have a room with fairly rectangular dimensions you can place the speakers on either the long or short wall If your room is cubic you will have far better results placing the speakers diagonally See next section ON LONG WALL Placing the speakers on the long wall enables you to achieve a very large and wide sound stage In fact usin...

Page 5: ...sure but may be necessary if you wish to achieve the ultimate in accurate frequency response Diagonal placement will prevent a portion of the standing wave energy from boosting certain frequencies since the reflection patterns are broken up in this configuration The distance to each side wall is critical and experimentation will be required with placement of not only the speakers themselves but al...

Page 6: ...midrange and treble frequencies due to three connections in the signal path instead of just one BI WIRING Using two separate pairs of speaker wires to deliver the signal to the woofer and midrange tweeter modules will result in superior image depth cleaner upper midrange treble and a larger sound stage These benefits are due to the isolation of the powerful bass signals from the more delicate treb...

Page 7: ...e have tried almost thirty different brands and types of speaker cables we can only give general recommendations due to the fact that the driving amplifier has as much to do with the type of desired wire as the speakers Since there are hundreds if not thousands of available amp wire combinations we are not in the position of having heard all of these combinations However in general stranded wire u...

Page 8: ...undary surfaces such as wood plaster glass and so forth Since the VR 4SR Mk2 s are quasi omnidirectional transducers designed to be the inverse of the recording microphone their sound output will react with the listening room in a positive manner only if properly placed There are two components of sound which reach the listener s ears 1 The direct arrival or initial wavelaunch of the speaker itsel...

Page 9: ...r image focus PINK NOISE LISTENING TEST Play a pink noise source such as a CD with test tones or an FM tuner set between stations with muting turned off The goal of this test is to determine whether the room s reflection patterns are interfering with the image focus built into the VR 4SR Mk2 design You will notice one of two sonic effects when listening to pink noise and 1 is what you want 1 If th...

Page 10: ...it since the image lock in is very obvious The pink noise will become a very strong ball of sound floating in between the speakers Keep moving the speakers until you hear this ball of sound As you move the speakers either closer together or further apart and experiment with toe in you will hear changes that enable you to know if you are headed in the right direction It isn t really difficult it s ...

Page 11: ...in the form of acoustic foam and Dacron fill must be compensated in both the driver design and the cabinet tuning alignment All VR Series use custom designed drivers with very high magnetic damping low Qes and stiff suspensions high Qms The tuning ratio is derived from a proprietary over damped Theile Small alignment with a total Q of less than 0 6 while the woofers themselves have a total Q below...

Page 12: ...ponse occurs when both the speakers and listener are at opposing ends of the room directly against the wall surfaces Since against the wall placement is not a prime location for soundstage openness and imaging focus we recommend placing the speakers out into the room at least 12 from the back wall to start Then playing a repeating bass line walk around the room in the general vicinity of the inten...

Page 13: ...ze However using silver cables will also tighten the bass The best possible bass response is obtained from high current solid state amplifiers making bi amping the ideal choice for the critical audiophile who wishes to have the best sound in every part of the frequency range See the section above regarding bi amping LACK OF APPARENT BASS In some rooms especially those with soft walls such as wallb...

Page 14: ... if you find that you need specialized help either in acoustical or electronic interactions not well understood by your dealer please don t hesitate to contact the factory by emailing your request to albert vonschweikert com A qualified engineer will assist you with any problems you are experiencing in achieving world class sound BRIGHTNESS A very common problem is brightness and is wrongly attrib...

Page 15: ... and the speaker cabinets This includes the ceiling walls and floor Hard plaster ceilings will reflect treble energy back down towards the listener and should be treated with acoustic tiles the soft and porous type or damping pads made from foam or fiberglass The walls can have a decorator rug drapes or diffusers at the first reflection point and the floor can use carpeting We have used artificial...

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