PROCEED AVP balanced Preamp/THX-processor/DAC by Mark Levinson $5000 List ! Cary Audio Design SLP-2002 Tube Preamplifier, Remote, Manual, Balanced In/Out Opens in a new window or tab. Pre-Owned. or Best Offer +$69.21 shipping. 6 product ratings - Artec ETN-3 Pre Amp EQ System With Tuner And Piezo Pickup For Acoustic Guitar. Proceed AVP2+6 Audio Video Preamplifier / Surround Processor is the famous trickled down version of the $30,000+ Mark Levinson No 40 Media Console under Mark Levinson's own Proceed brand. Given its level of audio performance and high-quality Mark Levinson heritage, it was considered to be a bargain at its full retail price.