In good working condition. Has a couple of scratches on the unit. It comes with a bag and two cables (type-c to type-c, type-c to lightning) Free shipping, CONUS only. Payment: Paypal (fee not included).

In excellent condition. Free shipping, CONUS only. Paypal.

ISN EST50 in mint condition. They were purchased from Penon Audio in July 2023. The stock cable included is terminated in 4.4mm. Shipping: CONUS only. USPS Priority, Free Shipping. Payment: Paypal Goods & Service (buyer pays for fee) Selling reason: Don't have time to listen to music.

I tried Beyerdynamic T5 (3rd gen) 32ohm. It also sounded not so good. However, DT770 with 80ohm sounded better than T5 from W4.

In terms of tonality, is premier closer to live or ue7? I have uerr, ue18+, ue live. I’m wondering will premier replace my live or 18+.

I’m not saying that it changes fq, but which is more pleasure for what type of IEM. It just how I hear it after testing different IEMs.

From my experience, Tune 1 works better with most IEMs because it sounds better with a U, V-shaped sound signature. While Tune 2 is better with neutral and mids centric IEMs.

Any news about Prime ie max release date?

Almost all dongles from my experience with IEMs sounds better from 3.5mm.

I think releasing a type-c version could be a better idea since, after a month iPhone is going to ditch the lightning connector. Reminds me back old day AAW Capri.

UE CIEM version and UE UIEM version are noticeably different, I agree. I like my 18+ (2gen), Live, and RR. Hopefully will try Premier soon by myself. Just curious about what path they chose for Premier. Is it a direct upgrade for 18+ or continues from UE Live. But it seems like hard to judge...

Is the Premier upgrade over 18+, or has different tuning? Which 18+ version do you have?

Tune 2 more tonal correct for me. I like timbre of slow filter, but it makes sound less warm. If I need more warmth, I use fast filter. EQ and SDO are useless to me, they make sound more digital to my ears.

To which part should be connected multimeter? To the dynamic driver when it is playing?

Probably yeah, how can I do that? I tried to make loudness equal using the same headphones during the test, and set to volume equally by headphone loundness to my hearing.

I don't know what methodology used LP for power consumption. I tested W4 and the other dongle for power consumption with my regular basis usage, and they statement is kind of just marketing to me. First, almost all dongles drop their power consumption almost to half when disconnecting the...

You can buy +Poly, than Mojo 2 can even replace the DAP.

Just wondering, is it better than Mojo 2? If I’m not mistaken, there was info that Fiio Q7 is still better, and some folks say Mojo 2 is better than Q7.

So far, ISN Audio EST50 is the only Chi-Fi IEM that I have liked a lot. I don't think I miss any frequency when listening to them. Usually, there are always missing parts on mids, especially on lower mids. I recently got Sony IER-M9, and I don't know why people call them a reference IEM. It is...

Not the best synergy with IER-M9, even with M9 preset. It sounds too digital, M9 loses its warmth with W4, I don't know why. Tested also with W2 OG, Go Bar, RU7, WM1A, and Penon Tail. Only W4 with M9 has piercing highs and slight forward mids. While W4 sounds darker compared to W2 OG with my...

Keep in mind that UAC 1.0 is slightly decries the dynamic range compared to UAC 2.0

I have RU7, and I would not recommend it to everyone who is sensitive to high frequency. Ru7 highs with DSD256 are kinda sharp and with headphones like Beyerdynamic (I have DT770 and T5 3d gen) is fatigue. With DSD64 is slightly better but still, portable delta-sigma dac/amps sound better in...

I personally choose XD05 Bal over RU7 if I use it with Headphones (not IEMs). 400mA power is still not enough for headphones.

W4 is better. No EMI issue. Do not get hot. Do not drain the battery quickly, and it sound much better. With more expensive IEMs, W4 sounds 2x better. RU7 to me, has a timbre problem, it sounds unnatural, and it loses control over the instruments with too short decay. Tonality-wise, W4 is more...

I am finally ready to say goodbye to my WM1A. W4 is so good it even surpasses WM1A with the resolution. It only loose to Sony with timbre. Listening to Caligula's Horse - Dream the Dead with UE Live, Filter set to Slow, and Tune to 2, I never could imagine that someday portable dac/amp could...