IMR R1 IEMssearch



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All-Rounder With Custom Hybrid Ceramic Drivers

Since its release, the IMR R1 IEM has received a lot of praise for its top-notch sound and unique design. At its heart is the company’s custom hybrid driver unit, which combines a high-res ceramic driver and a 13-millimeter beryllium dynamic driver with powerful neodymium motors. The result: a huge soundstage, precise instrument placement, and a frequency range (14 to 40,000 Hz) that covers the entire audible range of audio. And thanks to the R1’s switchable open-and-close port, you can change the staging of the IEM to make it more sealed off or open to the outside world. Want even more customization? IMR has you covered. Your R1 will come with five tuning filters that’ll allow you to alter the bass, treble, and midrange to your preferences. 

The Reviews Are In

The Headphone List says, "The bass, the clarity, the endless highs… it’s a showstopper. With the vents open, it sounds all the more spacious and airy, like a good open-back set of cans. I recommend a custom cable, just to avoid the demented antagonism of those stock cords. Other than that, simply be sure you aren’t overly sensitive to bright sounds, and I’d say the R1 is for you. It’s so good you may quit the hobby forever and call it a day."

One Head-Fi reviewer writes, "IMR wasn’t trying add unique coloring on the R1, but they rather stuck with the basics and nailed it. IMR R1 aims to have maximum wideness for both frequency response / staging, and I'd say they accomplished it very nicely. I can consider R1 to possibly have one of the widest soundstage among flagship IEMs available to the market, and that’s a good start for IMR. I’ll be glad to keep my eyes on how IMR shapes out their products in the future." 


  • IMR
  • 13mm driver with neodymium motors and beryllium diaphragm + ceramic driver
  • Proprietary open-and-close porting system
  • Impedance: 32 ohms
  • Sensitivity: 108 dB +/- 3 dB
  • Frequency response: 14–40,000 Hz
  • 24-karat-gold-plated ⅛ in (3.5 mm) jack
  • Detachable 4.6 ft (1.4 m) OFC cable with 2-pin connection


  • Hard case
  • ¼ in (6.5 mm) adapter
  • 7 pairs of ear tips
  • 5 tuning filters

Tuning Filters

  • Black: Maximum attack with powerful bass, rich mids, and controlled highs
  • Pink: Slightly decreased bass from the black filter with the same mids and highs
  • Copper: Maximum bass, lush mids, and slightly recessed highs
  • Orange: Balanced bass and mids with rolled-off highs
  • Blue: Balanced across the range; natural and airy sound with ideal mid and sub bass


All orders will be shipped by Massdrop.

Estimated ship date is Oct 8, 2018 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.