Originally Posted by Podster
Miguel, is it best to order this amp straight out full dress with the AD8620? I ask based on your break-in comments above and op-amp rolling. I'm not sure I would do any future op-amp rolling so I just want to know if you feel this unit sounds much better with the AD8620 vs. the OPA2134? Seems like a really nice amp for $191.00 to your door
Got a little Birthday wallet padding that's to fat for my pocket (probabbly not the wallet padding that's fat though:-0) THX
I need to chime in too. I bought the original XM4 with the Ti (Burr-Brown) 2134 op-amp and never really felt that the amp was doing all it could. Then I was introduced to the Ti (Burr-Brown) 2227, and after more than 200 hours of listening, felt that the XM4 couldn't sound any better. Then I read about the cursed (cur-sed) AD8620 mod and the fact that Practical Devices was offering the update themselves, along with a black enclosure option. Not being able to leave well enough alone, I bought a new one with the AD8620 (Bwa-ha-ha-ha!!)
Even after 200 hours of burn-in with the 2227, the XM4 with the AD8620 put the other one to shame. The bass is tighter, the highs more refined; I can't wait till this puppy fully burns in.
Yes, it is worth it, IMHO.
XM4 w/AD8620 and Grado 325i w/G1000 earpads...Wow, sound AND comfort!