LightSpeed Attenuator passive preamp by Gearge HiFi. Reference grade attenuator with many reviews on audiogon ,audioasylum and others that better very highly rated reference passive and active preamps. Rarely sold by owners and one must wait months to have it built and shipped from Australia. It is reviewed as producing clean, pure unadulterated attenuation from source components. This unit is in excellent condition with one tiny nick on top(hard to see), 9/10 everywhere else. Overall it is 8/10 to be conservative. Can be run off a battery. Selling at $325.00 for quick sale. 3% PayPal fee.