CRM-01Be Hi-Rez Audio Tweeter
Introducing CDT Audio High-Resolution Beryllium Dome Hi-Rez Audio Tweeter

This audiophile grade 1” beryllium tweeter has the ability to resolve the finest nuances in sound reproduction.

Beryllium is a material characterized by great stiffness, light weight, and high damping. Therefore, the beryllium diaphragm offers all the properties required to reproduce excellent sound. The sound of a beryllium tweeter raises the resolution to the highest level thus seeming to literally disappear. It has very low distortion and the distinct clarity that displays brings out the best in all types of music.


Optional: Black anodized look:

Hi-Rez Audio Tweeter

Technical specs and contents

  • Diameter: 1.0” (25mm)
  • Sensitivity: 89.8dB
  • Power Handling: 80W; 200W Max
  • Frequency Response: 1,500 - 40,000 Hz
  • Nominal Impedance: 4 ohms
  • Voice Coil Diameter: 25mm
  • Xmax: 0.19mm
    Magnet Weight:Neodymium
  • Surround: Fabric
  • Frame: Aluminum
  • Dome: Beryllium
  • Mounting Hole: 2.44”; 62mm
  • Outside Diameter: 3.31”; 75mm
  • Mounting Depth: 1.1”; 28mm

    Thiele-Small Parameters:

  • Free Air Resonance:900Hz
  • Voice Coil DC Resistance: 3.1 ohms
  • Voice Coil Inductance @ 1 kHz: 0.04 mH
  • Mechanical Q (Qms): 3.9
  • Electrical Q (Qes): 2.32
  • Total Q (Qts): 1.38
  • BL: 0.8 Tm
  • Max. Impedance at resonance: 10.6 ohms
Polished Aluminum Anodized Aluminum
Price (incl. warranty)

Price: $1099.99

Price (incl. warranty)

Price: $1099.99



It's Saturday night and I've been spending time, out in the brisk 45 degree weather, on my car audio system. It's completely worth it as I am blown away by what I've just experienced.

I've been extremely blessed to have many moments in my life with music that made me grin like an idiot and laugh with pure joy. When it comes to equipment changes with my car audio system it has happened tonight and I'm excited to share. 

"Don't fix what isn't broken." It wasn't broken. I fixed it. Enter the ES-01Be beryllium tweeters.

I needed to try something that seemed too good to live up to the description. You've already looked at it if you're reading this. It's all true. ES-01Be is a godly tweeter. 

The tweeters are fully visible, aimed at my ears from sail panel pods next to the side mirrors, but they completely disappear to the ear. It's strange but I have no other way to say it. 

The beryllium tweeters replaced ES-1200iS. Wonderful tweeters. I've heard countless speakers in my 36 years but of CDT tweeters I can recall trying TW-25, DRT-26S, DRT-26A, WS-100i, HD-1A/BL, ES-02BL. Neutral and transparent is a difficult target. Congratulations to CDT Audio and to anyone who makes the investment in ES-01Be. 

I think people should know that these are assembled by hand at CDT Audio facility in California by the owner and designer of CDT Audio products. 

Barry Schanz

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