Recently I bought the Quill Karma (which is an excellent iem, btw) and connected it to the iBasso DC Elite. I noticed a faint whine (caused by my phone) when music wasn't playing. I then connected it to the Schiit Vestri and heard faint crackling (presumably noise being picked up from the amp). To troubleshoot, I connected it to a USB-C battery- no noise with the DC Elite (as expected) but the crackling sound with the Vestri was still present. On the "high" setting the noise in both cases were completely eliminated.
I purchased the 3.5mm version, which imo makes more sense than 4.4mm as there is much less resistance in both high/ultra settings and you don't need balanced levels of power to drive a low impedance iem. I needed roughly 25% more power with the Vestri to get to moderate listening levels to make up for the loss (-12db) so make sure you have enough headroom. Also, I didn't notice any change in the sound sig. Assuming you have similar issues, this device would definitely be worth a try.
Completely eliminates the noise floor of my super sensitive IEMS without sacrificing sound.
I fully trust my low-impedance IEMs to this iFi gadget. And sure enough, it functions perfectly each time with high-output source devices. For instance, a 'Pirate Audio' Raspberry Pi headphone Amp and DAC that drives even my Beyerdynamic 300ohm DT 1990 Pros to excessive heights will be tamed suitably and safely for 6 ohm IEMs. Most often I find myself using the lesser impedance filter, giving me room to spare. Build quality is great and Bloom Audio great to work with, as always.
Worked perfect for what I needed it for!!!
iFi iEMatch+ | Audio Attenuator and Optimizer for Headphones and IEMs


