Originally Posted by Jasper9395
I hate to disappoint you but you should probably have bought the Little Dot mk1. This amp is better with the 32ohm Grado's. Impenitence matching is key... That being said you are on the right track though. the mk1 is supposed to have very good synergy with Grado's.
Hi. Thanks for your response.
You're not disappointing me. Yes, I am well aware of this suggestion, however I already have other amps available and will likely have other headphones so I made the decision to try the pure tube amp rather than a hybrid like the Mk1. I also took note of comments from other members regarding Mk3's and Grado's despite the limited output of the Mk3 into 32ohm impedance headphones and it is generally positive, some a lot more than that. I suspect it will be just fine for my needs, if not, I will move it on. It's a pretty cheap way of experiencing a good tube amp.
Oh, and the Little Dot Mk3 Reference Guide (pdf) says:
Recommended Load Impedance: 32 ohm~600 ohm
Grado's are (just) within recommended loads...
Looking at a recent post on the JDS C5D thread, specifications for mw required to generate 115dB based on headphone sensitivity were shared:
||Power (mW) Required for 115dB
According to the manufacturer specs, Grado SR225i are 98dB per mw. I'm sure there is more to it than just the numbers but the point is that there should be adequate output for reasonable listening levels.
Edited by maf_au - 11/18/13 at 2:17am