Portable amp for Beyerdynamic T1?

@lee_short You're welcome - hope you enjoy!

I ended up buying a Topping G5, thanks, @yage.  Looked like just what I wanted.

Thanks to everyone for their comments.

Turns out I've got both my own personal pair of sony NC phones (MDR-ZX750BN) and my company-supplied Bose QC phones.  I'll take both on my next trip and see which works better on the plane.  I've used the Sony on the plane in the past, and they were good at canceling noise and gave decent sound quality, but I was aiming to improve my sound quality if I could.

@yage -- I can stretch to $300, will read some reviews on the G5 to see if it works for my use cases. 

OP,

Definitely quiet comfort then. I live out side Portland Oregon and corporate headquarters was in New York for me for nearly 20 years… although most of the time I flew globally. You want wireless Bose. As a company I have hated Bose for masquerading around as high end. But they got Quiet Comfort right (not high quality but perfect for travel in noisy environments). Look into business class… half the folks are wearing them. 
 

I know a seasoned business travelers when I see khaki cloths, a Nikon or Arcteryx hat and Bose Quiet Comfort headphones in the Delta Lounge. We are the road warriors, seasoned and optimized to make flying as comfortable and enjoyable as possible. 

I recommend taking a look at the Topping G5 if you can stretch your budget to $299. Slim case with good clean power output.

Note that the iPhone will require some sort of Lightning to USB adapter to connect to a portable DAC / amp.

I also agree with other posters that if you're going to try to listen to music on a plane, you really need active noise cancelling (ANC) headphones. I have a pair of AKG N400NC for travel. They sound great and ANC performance is decent. If you're interested in buying, I'd wait for Black Friday. They've gone on sale for as low as $39, I believe.

With those headphones you can probably get by with an AudioQuest Dragonfly Red or Cobalt, but as they’re open-back ‘phones I don’t see them working on a plane at all.  You could buy reasonably-priced earbuds for the flight and use your T1s when not in the air, or you could buy the well-regarded Sony NC headphones that sound better and more accurate than Bose and you don’t have to let anyone know you bought Bose.  IMHO, Bose is better at cancelling sound than reproducing it.  FWIW…

https://www.amazon.com/Sony-WH-1000XM4-Canceling-Headphones-phone-call/dp/B0863TXGM3?th=1

You will get hearing loss listening to non NC cans on a jet.

Don’t even consider it.

Airlines give out cheap ones. They don't care about your hearing.

I have the T1 version 3. 

It will be more business travel than personal, from here on the west coast to corp HQ in Boston, so a longer flight and often a stop (most of the nonstops are redeye, which I'm not doing).  There will be significant time both in the office there and in the airport/plane/hotel -- maybe I'll give your Bose suggestion a spin and see how it goes.  I've actually got a Bose wireless headset that they sent me for my home office, it may well be Quiet Comfort. 

My amp at home is not a small footprint -- ModWright LS-100, quite large for a preamp, actually. 

What version of T1 do you have?  Version 3 is much easier to drive. 

I understand. One of my favorite headphones are Beyerdynamic T2. They are exceptionally hard to drive. One of my headphone systems is shown under my ID.

For over forty years I have traveled with headphones and stayed up on contemporary technology. Fairly recently I traveled 250,000 miles a year.

First question… is this business travel… or where most of the time you will be in noisy environments? I found that taking high end headphones on planes, in hotels and airports to be too compromised to be worth it. The ambient noise will wash out the high frequency sound and reduce the dynamic range to perform incredibly poorly.

In this case get a set of Bose Quiet Comfort, they will be unbelievably better. The noise cancellation alone while traveling will make your trip sooo much better. I put them on when I get in the airport, noise cancellation only, and take off at my destination. I would listen to music some of the time… no wires. Their sonic presentation is a bit cartoonish… but perfectly balanced, punchy and good sounding for noisy environments.

If you are packing up, say to go to a cabin or something for a couple weeks. Where the actually travel is not important. In this case I would either recommend getting Ultrasond Edition (maybe used). These are smaller and can be driven easily with an iPhone or iPad. Focal are also easier to drive… a portable amp with these would be good. The key here is more made to sound good from a source you already have.

Alternatively, if you are just going and staying in one place. Is your amp at home a small footprint? Wrap it up… take it?

There are lots of alternatives. If I know more about what you are looking to do.

Oh, and the source will either be my laptop or iPhone.  So built-in DAC will be valuable.

Oh, yeah -- budget is $250ish.

And tubes are out, too fragile for this purpose.