Von Schweikert Audio VR-4jr Lead Trap, Ancillary Equipment, Von Schweikert Audio, Armorlite Drive

Von Schweikert Audio

World Class Reference Speaker Systems for Music and Film

power. In these cases, it will be necessary to move either the speaker position or the listening position in order to optimize the response. By playing a recording with a repeating bass line, try walking around the room until you find the places where there is apparent bass. It will be necessary, in some cases, to reposition the speakers in order to allow the room to boost the bass by using the natural ‘gain’ of the boundary reflections. Simply move the speakers closer to the rear wall or side-wall in small increments until the bass sounds right.

LEAD TRAP

The VR-4jr has a special compartment at the bottom of the cabinet, hidden by the removable bottom plinth. This compartment was designed to be filled with lead shot in order to damp spurious cabinet resonances. Bass and lower midrange frequencies will be tightened when the Lead Trap is filled, as the movement of the damping particles adsorbs vibration. We have found that two 25 lb bags of lead shot from a gun or sporting goods store is sufficient to fill the cavities in both speakers (the lead will not completely fill the chamber, it takes around 180 lbs to fill both chambers, but that may be excessive).

•Place the VR-4jr upside down on a soft surface, such as a towel, and remove the bottom plinth.

•Poor approximately 25-50 lbs of lead into the opening. Shake the speaker until the lead settles.

•Replace the door and plinth and you're done. Note that the midbass/lower midrange frequency bands are now cleaner and tighter.

ANCILLARY EQUIPMENT

The VR Series is far more transparent than any other competing design, including electrostatics. (If you don’t believe this, put any electrostatic next to a VR and use a transparent switching device such as a copper knife switch to directly compare the sound of the VR to the electrostatic. Make sure that you use the same channel, since the electronics may have a large difference in sound between the channels, and the same brand of cable. It may be necessary to use a metal film resistor to equalize the sensitivity of the louder speaker in order to make a fair test.) Since the VR design is quite transparent, lacking audible coloration and distortion, it is necessary to use only the finest sounding equipment available to drive the VR-4's. This does not mean you must purchase the most expensive gear, just good sounding electronics, especially in the front end. Many digital products have limited depth and excess treble brightness caused by overemphasis of harmonic structure. The VRs will enable you to easily hear the differences even between digital cables, which theoretically, should have no sound at all. Any sonic qualities you attribute to the VRs are actually coming from the chain preceding the speakers. When using neutral driving equipment, the VRs will be found to have virtually no sound of their own!

930 Armorlite Drive,	San Marcos, CA 92069	13
Ph (760)410-1650	Fax (760)410-1655

E-mail:albertvonn@aol.com ~ Website:www.vonschweikert.com