Is there a tube amp that completely encloses the tubes without vents?

For headphone SET tube amps, I know of the following: Woo Audio WA6 Decware CSP3 ALO Studio Six DNA Stratus Are there others?

Which are the best HD650 4-pin XLR headphone cables? This info is harder to find than I thought.

I think I listen to headphones at a much lower volume than most people.  I'm having trouble finding a headphone amp I like but they do all sound pretty good when I crank em up for a few seconds, but I feel like I'll go deaf if I listen like that.  Is there a headphone amp that excels at low...

Any recommendations for a very musical solid-state or hybrid full-size headphone amp without brightness/harshness/edginess/fatigue? I'm using LCD-3 headphones.

I just got the WA6-SE and I'm not happy with it.  :(  I have the Sophia Electric Princess rectifier and a pair of 6FD7 triodes.  Should I try different tubes?  I'm finding the sound slightly bright, lacking in bass and mid-bass, and quickly fatiguing.  I'm using LCD-3 headphones and I've tried...

Can I drive a pair of LCD -3s with a regular amp and some kind of adapter for the headphone connection?

Has anyone heard the new Apex Sangaku amp? Do any other amps incorporate a Nutube?

I love the SET sound but I want to go solid state. I figured this might be impossible but I tried the First Watt SIT-2 solid state amp in my main system and it actually pulls this off. Now I'm wondering if I can do the same thing for my headphone system. I tried the Auralic Taurus Mk2 but the...

Are there any SET headphone amps besides Woo Audio, Donald North Audio, and Opera Consonance?

Does anyone know of an SET amp that works particularly well with the LCD-3 headphones?

Do all SET tube amps have 60hz hum/buzz or have some been able to eliminate it?

Which are the TOTL headphones with the least harsh, least bright, least fatiguing sound?  I have the K812 and LCD-X and both are too harsh for me.  I have some kind of a hearing sensitivity that I'm trying to figure out.

Which headphones would be the best choice for a Chord Hugo DAC?

I'm looking for a battery-powered portable amp for the HD800 headphones.  Is there a favorite for this?

I have AKG K812 headphones and an iBasso DX90 and the sound isn't very satisfying.  Is the Calyx M a step up in sound?

Can I use an iPod with the Camera Connection Kit to attach a USB DAC?  I've read conflicting reports on this.

Is there a consensus on which portable device(s) sound the best?  I'll be listening with AKG K812 headphones.   BTW, can any of them attach to a USB DAC?

I bought the AKG K812 headphones to plug straight into my Wavelength Proton USB DAC and the results are not impressive so far.  I chose those headphones because they are supposed to sound great without a headphone amp.  Now I'm thinking I may have to give up on that approach and buy a headphone...

Can anyone recommend a pair of over-ear headphones for under about $3K?  I will be plugging them straight into the Wavelength Proton USB DAC without a headphone amp so they need to be efficient.   Does anyone know which of the following are efficient?  ...

Which is the best sounding portable regardless of price?  My research seems to indicate the iPod+CLAS?  I suppose adding the right DAC to that would improve things even further?

What have you guys found to be the best-sounding source under $2K for a non-headphones amp/speakers setup?  I always thought it would be a dialed-in computer and a nice USB DAC but my eyes have been opened to the excellent sound produced by some portables and I wonder if something like the...

I've spent a lot of time tuning a desktop and laptop for hifi audio.  They run Gentoo Linux, mpd direct to hw(0,0), real-time tweaks, a Wavelength Proton USB DAC, and Wireworld Starlight USB cable.  I've been at it for years.  I'm on the road so I'm using the laptop (Dell XPS 13) and a powered...

Can anyone recommend a set of IEMs for plugging into a Wavelength Proton DAC while travelling?