Hello everyone! First post, here we go... I've had the Sennheiser HD 518 with Sabaj Da3 driving them beautifully for a while now. Then I bought the HD 650s and nothing in my household can drive them at even close to the sound quality of the 518s. I've tried my Pioneer home theater system, the Sabaj and straight from the computer. Not surprisingly nothing I have can juice these headphones. In fact they sounded so bad in comparison to the 518s, I first thought I'd bought a broken set (they're used). So, here we are. I think I'm going to need both an amp and a DAC, or is it possible to use the Sabaj as DAC and hook it up with a separate amp? I'm not very savvy with the connection possibilities, not to even mention the deeper technical stuff I'm going to need from the amp. Here's what I have: https://www.amazon.com/Headphone-Am...073SSNMKK/ref=cm_cr_arp_d_product_top?ie=UTF8 I've been considering: Schiit Fulla ($99) or Asgard ($199) I don't actually know what kind of sound quality difference there would be between these. https://www.schiit.com/products/fulla-1 https://www.schiit.com/products/asgard-1 Pro-Ject Box-Design Head Box S2 Digital ($145 used) DAC included https://www.project-audio.com/en/product/head-box-s2-digital/ JDS Labs Objective 2 ($129 + buying a DAC) https://jdslabs.com/product/objective2/ So, that's what I've been mulling over for a couple of days. Budget is around $200, but flexible if there's good gains to be had via a sale for example. I'd be very interested in your opinions and expertise on these devices since I'm still very green on these matters. Also, if you have any other suggestions, they're very welcome. Help is greatly appreciated and thanks for welcoming me to your ranks!