Hi. I made a similar assembly for a friend to whom I gave my PARA headphone. He's very happy with it. :)...

The fact that the Cosmo is 3 dB more sensitive (in power) than the Susvara (85.90 dB/mW SPL vs 82. 71 dB/mW SPL, on the RAA measurement site), makes it possible to use a headphone amp roughly half as powerful (and also roughly half as expensive) as the HiFiman Prelude amp recommended for the...

The fact that the Cosmo is 3 dB more sensitive (in power) than the Susvara (85.90 dB/mW SPL vs 82. 71 dB/mW SPL, on the RAA measurement site), makes it possible to use a headphone amp roughly half as powerful (and also roughly half as expensive) as the HiFiman Prelude amp recommended for the...

Hello everyone. A competitive R2R amp / dac for headphones that seems to work very well with the Cosmo high-tech planar headphones (re-equipped with the XL upgrade pads recommended by friend @N3urolink): the Hifiman Serenade. Link to original post...

Great ! :) For US$999 (R2R Hifiman Serenade amp/dac) + US$899 (Moondrop Cosmo high-tech planar headphones) + around US$30 for the Cosmo upgrade XL pads recommended by @N3urolink (Brainwavz Memory Foam Hybrid Earpads XL size) you get a complete and very high-performance Hi-Fi headphone system...

Hello everyone. It's important to know that the Cosmo's headband is large; small heads, please refrain, otherwise you'll have the pads (even the XL size recommended by friend @N3urolink on head-fi) centered below the ear canal, same headband hoop set to the lowest setting for the headband...

Hello everyone. It's important to know that the Cosmo's headband is large; small heads, please refrain, otherwise you'll have the pads (even the XL size recommended by friend @N3urolink on head-fi) centered below the ear canal, same headband hoop set to the lowest setting for the headband...

Hi. FiiO K9 Pro ESS Amp set to High gain position, the 1.1 W of power on 16 Ohm (unbalanced) of this amplifier are imho a minimum, but should be enough to drive the Cosmo correctly. :)

MOONDROP COSMO Open-Back Planar Magnetic Headphones Review https://www.techpowerup.com/review/moondrop-cosmo-open-back-planar-magnetic-headphones/ Hello everyone. I quite agree with the reviewer of the Cosmo (above), except on two points. First point of disagreement : the Cosmo's wearing...

MOONDROP COSMO Open-Back Planar Magnetic Headphones Review https://www.techpowerup.com/review/moondrop-cosmo-open-back-planar-magnetic-headphones/ Hello everyone. I quite agree with the reviewer of the Cosmo (above), except on two points. First point of disagreement : the Cosmo's wearing...

Hello everyone. I've just come out of two long listening sessions with the Cosmo re-equipped with its two upgrade pads: the Para's hybrid stock pads, and the pads recommended by @N3urolink, the Brainwavz Memory Foam Hybrid Earpads XL size. Listening last night between 10 p.m. and 6 a.m.; then...

Hello everyone. I just received at noon (in France) the hybrid pads recommended by @N3urolink for the Cosmo: Brainwavz Memory Foam Hybrid Earpads XL size les pads (the ones on the left in the photo). I'll be listening to them tonight (in France), with my Cosmo, compared to the Para's stock...

Hello everyone. I'd like to come back to the excellent FR in-ear measurements made by our friend @gammi with the Immanis/Magna ribbon headphones duo, which can be compared to a legendary headphone that was until then a reference for FR (at least as seen by the famous headphones critic...

Great ! :) This ties in with my analysis of the FRs of these two headphones (Immanis and Magna).

Hi. Since @gammi's mega-shootout included no less than 7 headphones with comparative FRs represented on the same graph, including two FR of headphones with exactly the same blue color, I took the liberty of clarifying the situation by erasing the in-ear FR curves of all the headphones except...

Hi, there. What would be useful (and more practical and informative) for everyone, would be to superimpose on the same graph and at the same vertical scale (for dB) the FR of Magna/Immanis with the FR of Susvara (which appears in yellow, but not at the same scale as Magna/Immanis, on the 2nd...

Thanks for the measurements. :) Apparently, the Magna measures better than the Immanis: FR curve less rough; frequency dip less accentuated at 1.5-2 KHz. Compared with the Susvara's FR (in yellow, 2nd graph), the Immanis/Magna's frequency peak at 4.5 KHz seems quite pronounced.

Quote: "The COSMO is an amazing headphone, juste needs some tweaking" Which ones? Everything can be summed up in these two photos (below). First photo: you can see two 2A3 power tubes delivering (with my amp) 2 x 3 W on 32 Ohm and 2 x 1.5 W on the COSMO's 15 Ohm load (impedance): enough to...

Hi, there. Indeed, the sensitivity measured by the RAA measurement site concerns the Hifiman Susvara (as well as other headphones measured by this site) and not the two Raal 1995 Immanis and Magna ribbon headphones. For my calculation of sensitivity (by power) of the Immanis and Magna...

Hi all. To find out about the effective sensitivity of Immanis and Magna ribbon headphones and their power requirements for amplification General results HIFIMAN Susvara Sensitivity by voltage: 94.80 dB/V SPL Sensitivity by power: 82.71 dB/mW SPL Average impedance : 61.82 ohm HIFIMAN Susvara...

Indeed ! (again) :) Source (RAA) General results HIFIMAN HE-6 Fazor Sensitivity by voltage: 93.56 dB/V SPL Sensitivity by power: 80.65 dB/mW SPL Average impedance : 51.14 ohm General results HIFIMAN Susvara Sensitivity by voltage: 94.80 dB/V SPL Sensitivity by power: 82.71 dB/mW SPL Average...

Indeed ! :)

Hi. I listened carefully to your two musical extracts (below), recorded by your microphone with your COSMO headphones as a transducer, equipped with these two pairs of upgrade earpads, with my Sennheiser HD-400 Pro headphones on my ears (on my gaming PC)...