This Hafler DH 500 amp comes from its original owner in excellent working condition and very good cosmetic condition. Heavily modded by Musical Concepts, this in no ordinary Hafler DH 500. Mods are the PA4 SE and Power supply mod PS 200. Inside, the unit is super clean, the upgrades were professionally done as shown by how neat the wiring, solder joints and overall installation are presented. These upgrades are sold in kit form, or the unit can be sent in to have the mods done and it is evident that this unit was sent in for the work. John Hillig of Musical Concepts is well regarded in the industry and his modifications get rave reviews.
Cosmetically there are some scuffs and scratches, but the unit presents itself very well. Aside from bench testing the amp and detailing it the only repair needed was a new power switch, which tend to need replacing over time. We have been running the amp in one of our systems for about three days now and it has performed flawlessly.