I have had good luck with Schiit products but I don't think they make a single combined device like this. If you are not opposed to two products, I'd look at a Schiit Mani phono-pre-amp $130 (I have one - very good) and then a Schiit Magni-2 Uber headphone amp ($150), which also has pre-outs for your R-15PMs. Note when you plug your headphones into the Magni-2 Uber, it mutes the pre-outs - seems to make sense.
If you want one combined product, doing a quick google search, I found this but I don't have any experience or recommendations in this area: https://www.amazon.com/Bellari-VP130-Preamplifier-Headphone-Amplifier/dp/B002TD4GME/ref=s9_simh_gw_g147_i1_r?_encoding=UTF8&fpl=fresh&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=2V5XXVKT1YYJBFTZTB50&pf_rd_t=36701&pf_rd_p=a6aaf593-1ba4-4f4e-bdcc-0febe090b8ed&pf_rd_i=desktop
Up from Nap, woke to the aroma of Black Beans boiling. some kind of Chile coming later.
Quite and sunny awaiting the next storm, soon.
Gladys Cravits has sustained storm damage, (Small tree in neighbors front yard leaning over into her front yard)
Im sure i just missed the Media coverage wile napping.
Trash/Yard waste pickup on Wend, saw what appeared to be a server rack neighbor placed out there, nope
Old partical board stereo cabinet upon further inspection.
I saw a pair of used Klipsch Cornwalls advertised in the local classified. This was in the early 80s. I was in high school at the time and was already into hifi. I call the guy, set up a time to see them, show up on time, and found he wasn't home. His wife said, "He decided he wants to keep them". I was pretty disappointed, but who can blame him?
A few years later, in '86, a local audio shop opened and they were a Klipsch dealer. They had a pair of brand new raw birch Cornwalls for sale, $1140. I had a decent job at that point, so I decide this is it. I was living with a roomate in an old house with 4 rental units. He was as excited as I was; we headed down to the shop, picked them up, raced home, and set them up. I had an old Denon 80W integrated amp, put on some music, and blasted them as loud as we could stand. It lasted about 10 seconds, which was the time it took our upstairs neighbor to fly down the stairs and scream at the top of her lungs, "TURN IT DOWN!". We pissed ourselves laughing. "WHAT D'YOU SAY?"