SPL Phonitor X vs. Benchmark HPA4

I've been looking at and researching two big boy headphone amps (plus built in preamps) and wondering which one is "best".
SPL Phonitor X - $2,500 (without DAC)


Which of course I would get in red, naturally.
vs.
Benchmark HPA4 - $3,000


They both have a similar feature set, so I'm not sure if there is one clear "winner". It's possible the only way to know for sure which is "best" is to listen to both of them back to back.
Anyone have experience with either of these pieces?
SPL Phonitor X - $2,500 (without DAC)


Which of course I would get in red, naturally.
vs.
Benchmark HPA4 - $3,000


They both have a similar feature set, so I'm not sure if there is one clear "winner". It's possible the only way to know for sure which is "best" is to listen to both of them back to back.
Anyone have experience with either of these pieces?
Comments
Phonitor X:
HPA4:
And they both have a perfect feature for my specific use case, the ability to have a fixed or variable preamp output!
The SPL has the interesting crossfeed feature and VU meters going for it. The Benchmark has a superior relay stepped volume control, a touchscreen and great specs. It's also $500 more expensive though.
I'm leaning toward the SPL, even though it's slightly too large for where I want to put it.
Why not get a preamp with headphone output? I have a pre that I used for headphones at work, and it was great.
Sony XA-5400ES SACD
Pass XP-22 pre, X600.5 amps
Magico S5 MKII Mcast Rose speakers, SPOD spikes
Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
Shunyata Sigma XLR analog ICs, Sigma speaker cables
Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables
Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
Three 20 amp circuits.
Sony XA-5400ES SACD
Pass XP-22 pre, X600.5 amps
Magico S5 MKII Mcast Rose speakers, SPOD spikes
Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
Shunyata Sigma XLR analog ICs, Sigma speaker cables
Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables
Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
Three 20 amp circuits.
I like the look of the SPL better. But gotta love the touch screen
One for sale. No affiliation.
https://sfbay.craigslist.org/sfc/ele/d/san-francisco-benchmark-hpa4-headphone/6893677375.html
Cheers
AVR-Pioneer SC99
Adcom 585
RTi12s
Rear- RT150
Center-CSi5
Sub-Rythmik audio F25
Player- Oppo BDP-103
Living room 2ch rig:
Peach Tree Decco, Onkyo CS-5VL SACD and Linn Kelidh
Bedroom 2ch rig.
Cary AE-3, Parasound 2125, Marantz SA8005, Usher V-601 or SDA 1C, SVS SB12-NSD, Intel NUC PC and Panamax MX5105
Headphone rig;
Little DOT MK II with upgraded tube's and Sennheisers HD650.
Heh, "overkill". That's funny coming from someone with 600 watt Pass Labs monoblocks.
Saw that. Also listed on USAM for $2,400.
I don't know, sounds about right to me.
I have issues. Deep and troubling issues that may never fully be addressed.
I totally agree...my Woo WA3 is special as is my Bottle head crack I built myself....or as Arron can contest, as he has built many of these headphone amps... I still think their awesome seriously special head phone amp's out theirs that when use with the right amp can sound so special..like many sennhiesher cans are 300 ohms and need a different head phone amp then many of the 32 ohms cans do!
you must match the correct amplifier to the cans you are using or your results will suffer big time!
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD
Anyway, I'll get the Phonitor X unboxed one of these days. Before the end of the year with any luck!
Made it, just barely!
Just trying it in "pass through" mode right now, where it's taking the output from my DAC and passing it through un-attenuated to it's the RCA output along to my powered speakers. This was one of my requirements, so I can effortlessly go between headphone and speaker listening.
Previously I had the output of the DAC connected directly to my powered speaker's preamp/control module. Definitely noticing a difference in sound having it running through the SPL. So far right out of the box with zero hours on it, it sounds like maybe the imaging/space is better but it sounds clinical and sterile. Hopefully that improves with the break-in of whatever circuitry that controls the signal pass through functionality.
But now that I'm testing it, I realize that the output is on constantly and independent of the switch's position. So even when it's on mute, it's passing the signal through.
Not entirely what I had in mind, but not a "huge" deal, since I can just turn the volume on the powered speaker's controller down all the way. But I will have to decide if this is something I want to live with or look for another headphone amp that will do exactly what I'm looking for.
I've only tried my inexpensive ($120) Koss Pro4S headphones so far, but the biggest standout is the bass and the dynamics. The bass is rich and bold, but still fast and agile. The dynamics are effortless and as a result it conveys a great sense of rhythm.
Also worth noting is that the background is completely black. No hiss, hum, etc. This thing is clean!
Truth be told, I haven't really been a huge fan of these headphones ever since I bought them, but they sound better than they ever have when running off this amp. Just goes to show how you can really maximize the performance of inexpensive headphones (or speakers) by hooking them up to a really nice amplifier.