Did you know you know? You need ear mold impressions to order custom-fit JH in-ear monitors.


  • In-ear monitors do not inherently protect your hearing. 
  • However, with a properly isolating seal and when used correctly, following safe listening practices, custom in-ear monitors offer excellent ambient isolation that allows for lower listening levels and some loud sound attenuation. 
  • All in-ear monitors block out some ambient sound; however, how much attenuation (reduction of the volume of external sound reaching the ear) in-ear monitors provide will vary. In order to obtain maximum attenuation:
    •  the IEMs should not have any open sound bores or open vents that would allow for unregulated amounts of external sound to enter the ear and 
    • the IEMs should have a properly isolating seal and should fit snuggly and deeply into your ear canal, which is why a proper fit is so important, making the ear mold impression and follow-up fitting process crucial.  
  • Tips:
    • ​See an audiologist and have your hearing tested every year (or sooner if you are having issues). 
    • Know how loud you are listening. In-ear monitors can absolutely harm your hearing. Some IEMs are capable of delivering up to 130 dB SPL to your ears! That's loud-really, really loud. Keep the volume down. 
      • How loud you can safely listen is a product of how loud the sound is, how long you are exposed to the loud sound, how often you are exposed to loud sounds, and individual risk factors. 
      • Ask us how we can help you find out exactly how loud you have your in-ear monitors turned up so we can make absolutely sure you are listening at safe volume levels. 
    • Re-train your ears. Using in-ear monitors is going to sound different. You will be more isolated on stage than you are used to and the monitor mix will sound different through in-ears than wedges, so you will need to re-train your ears to listen in this new way. In addition, it is important to know that if you are used to using floor wedges and switching to in-ear monitors, there is a tendency to turn the IEM volume up to the same, usually unsafe, level that your wedges were at without even realizing it, so you will need to re-train your ears to listen at lower volume levels. 
    • Wear both earpieces! Taking one earpiece out negates any isolation and attenuation you would have had for that open ear canal. When you take one ear piece out, the tendency is to raise the volume of the IEM still in your ear to compensate and hear the mix over the ambient sound. Now both ears are susceptible to damage from loud sounds.
    • Use either an internal or outboard compressor or peak limiter to help protect against bursts of feedback, transients and other sudden loud sounds that can occur during a performance. ​
    • Be aware of how the monitor mix and your monitoring system impacts the use of your in-ear monitors. 
    • The more isolation your IEMs provide, the more attenuation you'll have of the ambient sounds and the less you'll need to turn the volume up. The deeper in the ear canal that your IEMs fit, the greater the isolation. Silicone in-ear monitors can more comfortably go deeper in the ear canal and may offer a snugger fit than acrylic IEMs. Properly fit, custom in-ear monitors will provide better isolation than universal-fit earpieces. 
  • ​Ultimately, the goals should be to keep the stage volume as low as possible, to obtain as much attenuation as possible from your in-ear monitors to protect your hearing from ambient sound levels, to wear both IEM earpieces to protect both of your ears, and to keep the volume of your IEMs in a safe listening range. 
  • At the end of the day, you are in charge of how loud you listen and in-ear monitors are capable of being just as damaging, if not more damaging, than floor wedges. Make protecting your hearing a priority.
  • Contact us to learn more and to make sure you are doing everything you can to protect your most valuable piece of gear-your ears. Our audiologist is happy to consult with you and answer any questions you have about safe listening with IEMs. 

A St. Louis native, Jerry Harvey grew up with a passion for music and a flare for audio. That passion combined with an eagerness to learn allowed him to turn running sound in local venues into touring with some of the biggest names in music history. In 1994-1995, in-ear monitor technology was in its infancy. As Van Halen’s monitor engineer, Jerry was presented with a challenge to find in-ear technology that would work for drummer Alex Van Halen.  Jerry funneled his experience tuning large arena sound systems and engineered the first 2-way, custom-fit earpiece just for Alex. Before long, Harvey was designing and manufacturing in-ear monitors for touring musicians, crew, and audiophiles. 

Jerry Harvey History

  • 1994-1995 Engineers the first 2-way, custom-fit earpiece specially designed for Alex Van Halen. Jerry founds his own company, Ultimate Ears.
  • 1998  Creates the first dual low balanced armature (BA) design and the first triple BA IEM with dual low BA and single high BA.
  • 2004 Designs the first hybrid IEM with a single low diaphragm and single BA.
  • 2005 Logitech acquires Ultimate Ears. Jerry continued to work as one of the top Monitor Engineers in the touring industry.
  • 2006 Designs the first band pass subdual BA and the first quad BA IEM with dual low BA, single mid BA, and single high BA.
  • 2007 Jerry Harvey Audio got its start with Jerry designing and manufacturing three models of groundbreaking communication in-ear headsets for private pilots.
  • 2009 Creates the first dual high BA design, first dual mid BA design, and first six BA IEM. Launches the Jerry Harvey Audio Pro Series.
  • 2010 Designs the first quad low BA design and first eight BA IEM.  Jerry Harvey Audio aviation line was discontinued to focus on music.
  • 2011 Designs the Tri-amp Inverse Active Crossover Amplifier.
  • 2012 Designs the Time and Phase Wave Guide freqlphase™.   Wins Popular Science Invention of the Year for JH13Pro/JH16Pro.
  • 2013 Creates the first quad high BA design, first quad mid BA design, first bass adjustable IEM cable, first 4-pin Locking Connector, first 12 BA IEM.

​Reference: Jerry Harvey Audio

  • frēqphase™ Time | Phase Waveguide
    • frēqphase™ time phase steel tube waveguide corrects time and phase of multiple drivers. By reengineering how and when sound is traveling to the ear, the waveguide, JH Audio created the first phase coherent earphone by delivering the low, mid, and high frequencies to your ear at once. 

  • soundrIVe™ Quad Driver Technology
    • Jerry Harvey Audio's proprietary mini quad drivers.

  • Variable Bass Output Adjustable Cable
    • User controlled low frequency drivers with adjustable bass output. ​

  • Acoustic Sound Chamber™
    • A 3D printed, recessed tubing system that keeps sweat at bay and alleviates the need for excessive cleaning.


  • Dual Supertweeter
    • Produces an extended treble response. Delivers a wide stereo imagery and a stunning open top-end for high-range reproduction.

Reference: Jerry Harvey Audio


Phone: 314-313-2289 (call or text)


JERRY HARVEY AUDIO In-ear monitors

Sound Access is proud to be an authorized dealer of JH Audio in-ear monitors. 

JH Audio iems




Did you know?

You can demo JH Audio in-ear monitors. 
We have universal-fit demos of the JH Audio IEMs we carry so you can try before you buy to make sure you get the perfect in-ear to meet your listening needs. ​​



Contact us to schedule an appointment.