Von Schweikert Audio VR-4SR MK2 - Manual (Page 6)

6
CARPETED FLOORS
: Install the spikes after break in – this is easily accomplished with two people,
one tipping the speaker back while the other installs the spikes. Be careful not to let the M/T unit fall
off the woofer module! If one person installs the spikes, remove the M/T modules before attempting
to install the spikes.
Make sure that you level the speakers so they don’t rock, and use the locking
nuts to make sure the spikes won’t vibrate loose. You will be amazed at the improvement to both the
bass response and the image focus after installation of the spikes.
WIRING
The VR-4SR Mk2 was designed to accept all forms of speaker cables, so you will find three pairs of
binding posts on the back of each speaker system: two pairs on the woofer module and another pair on
the midrange/tweeter module. See below for information on what these binding posts can do for you.
SINGLE CABLE:
Connect the speaker cable to the binding posts on the upper midrange/tweeter unit, then connect the
supplied Data-Link jumper to deliver the signal downwards to the woofer module. Note that there are
metal jumper links that connect the bottom two pairs of binding posts together; these must be used
with the Data-Link jumper in order to transfer the signal to both woofer and midrange/tweeter
crossover boards when using the single speaker cable.
NOTE: we recommend using this only as a temporary solution, as we designed the speakers expressly
for bi-wiring. DO NOT connect the main speaker cable to the woofer module, as you will be able to
hear a loss of clarity in the 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 treble
frequencies as the signal travels up the speaker cables. Since there is generally ten times more voltage
present in the bass signal, the generation of a magnetic field in the positive and negative conductors
will interfere with the more delicate treble signals. This magnetic modulation is easy to hear on a high
resolution speaker like the VR-4SR Mk2 but may not be as audible on lesser speakers. Using two
separate conduction paths will enable the bass frequencies to be separated from the treble frequencies
due to the high impedance “seen” by the signals due to the internal crossover networks. In other
words, since there is a “high impedance” (to low frequencies) in the midrange/tweeter crossover, bass
frequencies WILL NOT travel from the amplifier up to the midrange/tweeter unit, even though both
speaker cables are connected to the same binding posts on the amplifier! The opposite effect occurs in
the woofer cables, where no midrange/tweeter frequencies will travel due to the high impedance
“seen” as the result of the woofer crossover. Crossover filters work due to the reactances supplied by
the inductors and capacitors; inductors generate a “high impedance” to midrange/treble frequencies
and capacitors generate a high impedance to bass frequencies -- it’s like pouring water on the side of
a hill: the water will never travel uphill against gravity!