Hello, I just joined, primarily for the audiophile products. Looking at purchasing the NHT C3 speakers for our new living room. Space is about 15 feet wide by 33 long and they will fire long ways. Space is just for general listening, music room with all equipment is downstairs, so hoping they will fill it with sound nicely. Cheers.
Mar 18, 2024
I HIGHLY recommend saving up for a dac and amp sooner rather than later. Both headphones will be anemic without proper power. If at all possible, try a bunch of amps/dacs before purchasing or you will waste some money purchasing and reselling on eBay as I have. :) Or only purchase gear with a good return policy. Schiit tends to have good bang for your buck options but even then be sure to try a variety, I love some of their stuff while others leave me feeling "meh".
In the case of these headphones, I think both of them are pretty safe options and once they are properly powered you should have a totally new experience with your music. The first set of good headphones are the most dramatic if you've only listened to cheap ones before.
Lots of detail on the principles and some measurements are at http://nwavguy.blogspot.com/2011/02/headphone-amp-impedance.html
The response of the 4xx is included in https://www.innerfidelity.com/images/MassdropHiFiMANHE4XX.pdf
and of three of the Senns are included in https://www.innerfidelity.com/content/very-important-sennheiser-hd-580-hd-600-and-hd-650-measurements
I own Senn 598s myself, and like them a lot. As a result of owning those, I now also own a portable and a desktop headphone amp, having heard how awful they sound through a stereo receiver. That spike in impedance in the bass region? Put these on many integrated or receiver headphone jacks, and they have terrible, overemphasized, sloppy bass and recessed mids and highs. Almost like listening to music on a car stereo - if you're outside the car, and it's loaded up with bass tubes.
And, after this drop looked closed, I found 400i on amazon at 180 and went for it. If I'd known it would reopen so quick, I'd have picked up a set of these :) Either of my amps will be fine with 400i as well, and a lot of folks think that phones in particular don't have the current delivery to get them to good volume.,
But for a receiver and PC setup, you just won't have the impedance match varying within the audio band. There may be other issues, but that one super audible one will be off the table.
Topping NX4, Schiit Fulla, Monoprice Headphone amps are a couple of good affordable options. There are also many FIIO amps that fit the bill but I’m not familiar with them.
I have a small battery powered portable I only paid around $40 for on Amazon. It‘s not my favorite amp, but portable and even at $40 it improves the sound.
I personally prefer a tube amp over solid state, but either has merits.
I have the 400i breaking in now and just tried plugging them into the headphone jack on a receiver I know makes a pair of Senn 598s sound like cheap Beats clones from Walgreens.
I didn't listen super carefully, but the initial impression wasn't what it was with the Senns - "WTF? what's wrong here?" It was a much more favorable listen than that - I may actually run the headphone signal from the receiver to a switchbox and so some a/b'ing agains the dac/amps I'm using. I was listening to a classical piano track when I first plugged in, and was interested enough that I shifted gears to a Zevon track I know better, "Dirty Little Religion" - both sounded fine.
I can say, I just recently watched The Punisher on Netflix with the 4XX and it's crazy how much punch bullets and explosions have. I also used them when I was playing Wolfenstein II: The New Colossus and thought they did a good job of conveying soundstage with footsteps and bullet placement while not murking voices and other effects.
The 400is have a very close to flat impedance response throughout the audio band, so they don't exhibit the distortion that the 598s do. I hadn't realized that in general, planars have much less variable impedance .
Lots more on this topic is available at
http://nwavguy.blogspot.com/2011/02/headphone-amp-impedance.html
And as I said, the 400i sound fine on the receiver - they're pretty low impedance but because it's continuous, the exaggerated bass and absent high end that 598s show with the receiver aren't in evidence. The receiver definitely has the power to drive them.