Super Best Audio Friends
The evolution of the original irreverent and irrelevant and non-authoritative site for headphone measurements, i.e. frequency response graphs, CSD waterfall plots, subjective gear reviews. Too objective for subjectivists; too subjective for objectivists
Grado is in no danger of disappearing, but it's about time we revisit a classic, learn why it was so special in the first place, and tweak it to get the best out of it. I present the Grado RS2.
FIRST IMPRESSIONS (SOUND): https://www.superbestaudiofriends.o...nic-studios-oblivion-review.8925/#post-289155
I ordered the optional speaker taps (this amp doesn't have much power, but it will do 4-ohms - might do well with my speakers). Note the nice spiked feet. This is looking like a better and better deal given how expensive stuff costs up there - assuming the sonics pan out (and I have no reason to suspect that they will not given hints to the amps topology). Hopefully UltraSonic Studios will hold off from drastic price increases a la Feliks if and the brand gets more recognition. There is a large fan underneath the amp which is suspended to the bottom plate with rubber mounts like PC fans. I'm not totally sure if this is necessary, but it was probably put there out of an overabundance of caution.
Noise floor and residual mains noise are lower than -100 dBu which provides excellent blackground.
Dynamic Range is approximately 108 dB.
Bandwidth is > 300 KHz for 300R headphones which will result in excellent transient response.
Distortion is 2nd harmonic dominant, with 3rd harmonic 20 dB lower and higher order harmonics lower than residual mains noise. This tends towards a very clean yet euphonic sounding presentation.
Setup picture (measurements):
AFTER (for kewl people)
Drop Panda Frequency Response
EARS coupler + SBAF compensation (perceptual neutral approximately straight vertical line across)
The Jotunheim R was amp created mostly for the RAAL Requisite SR1a Ear monitors. RAAL Requisite is an outfit which has made boutique pro gear. The idea behind the SR1a was for a portable pro mixing or mastering platform. The SR1a requires a converter box for use with speaker amplifiers. Without getting too deep into the details, there are a bunch of resistors and coils inside the box so that speaker amps can drive the RAAL ribbon, which is in essence a short circuit. The ribbon is just a piece of metal tape bathed in a magnetic field. Those who have DIY'd speakers using RAAL ribbon drivers know that they come with a big massive box behind them. Inside this box is a transformer that allows power amps used to driving 8-ohms, 4-ohms, maybe even slightly lower, to feed the 0.2-ohms of the ribbon (or something close to that, but you guys get the idea). What the Jotunheim R does is offer a direct drive to the ribbon, without anything in between (more on this next paragraph).
The iFi Micro iDSD BL could be the finest transportable all-in-one amp/DAC unit I have heard. It might be interesting to compare to the Chord Hugo 2 under more controlled circumstances (blind and in a home setting) however; but that may need to wait. Or maybe not, since the Hugo 2 at $2500 is meant for people who's parents in a totally different wealth bracket. For what it's worth, I didn't care for the Hugo 2. However to be fair, I may have judged it based on performance to cost, or I could have had the the wrong filter settings that did not suit my preferences.
Last year we were super selective. There were few winners. Not much gear really got the senior members excited as many nominations were veto'd for an award. This year however is totally different. Lots of great stuff worthy of GS awards. It can even be argued that the DS gear deserved GS awards. I almost feel bad about giving out so many awards because the award is supposed to be selective - not everybody is supposed to be a winner. But the fact is, lots of great stuff this year, and some quite affordable too.