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Mark Muschett puts Evergreen's Force Feedback Headphones to the test

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Evergreen's RumbleFX Force Feedback Headphones

Mark Muschett  - Last updated April 3, 2001

Important Info:

Headphones By : Evergreen Technology
Price : $60 SRP
Frequency Response: 5Hz - 28kHz

Minimum/Recommended System Requirements

  • Sound card or other audio device with analog stereo output. 

Reviewer PC:

Mark
- Win98
- Celeron 333a o/c 416
- 128MB PC100 ram
- Creative TNT
- Creative Voodoo Blaster 12 M
- 6.1  and 13 GIG EIDE HD
- For headphones comparison testing I used a set of Sennheiser HD525s and Takstar force feedback headphones.  A Sound Blaster Live and a Hercules Game Theater XP was used for testing. 

 

Specifications:

  • Bass Activated force feedback mechanism
  • Dual Diaphragm construction
  • Driver Unit: 40mm diam. dome
  • Diameter: 57mm diam actuator
  • Impedance: 32 Ohm
  • Sensitivity: 102dB S.P.L. at 1Khz
  • Max Power Handling: 500mW
  • Frequency Response: 5-28,000Hz
  • Power Requirements: 3V
  • Cord Length: Approx. 4m (13 ft)
  • Stereo Plug: 3.5mm diam.
  • Battery Life: Approx. 30 hours

 

Review Index:

Introduction

On March 26, 2001 Evergreen Technologies, Inc., a leader in PC performance upgrades since 1989, launched its new RumbleFX force feedback headphones for a list price of $59.99. These headphones are the first in Evergreen's new RumbleFX line of consumer electronics products.

Evergreen’s press material claims an incredible range of benefits come with using the RumbleFX headphones. You can have a look for your self at the full list in the press release.  I am not going to list them all here. Instead I will run through the real world features and performance to help you decide if the RumbleFX headphone should be on your wanted list.

 

Detailed Overview and Performance

Lets start with the more mundane component of the headphones. They use a padded adjustable headband and a soft cushion ear cup in a closed format that keeps the inside in and the outside out in terms of acoustics. Something else worth noting is the earcups are mounted with a natural (back) tilt and offset from the headband center. The end result of this ergonomically designed fit is the RumbleFX headphones are quite comfortable. For what it’s worth they are a fair bit more comfortable than the cup on the Takstar force feedback headphones sold by Xitel but not quite as comfortable as the cup on the lighter, open format Sennheiser HD 525 headphones that I normally use. Because the RumbleFX headphone uses a closed instead of open format you will be less likely to disturb anyone else in the same room and it also does a better job of shutting out the outside noise compared to open format units. The trade-off is closed cup models tend to be a bit warmer for long term use. Having said that, I had no trouble wearing the RumbleFX headphones for a long time without discomfort. Closed format phones are often a bit more bass heavy than open but that turns out not to be the case with the RumbleFX phones when the force feedback is disabled.

The unit has a single wire attached to the bottom of the left side of the headphones. This makes it more convenient to put on and remove than units with a cord attached to both cups (like the Takstar and Sennheiser HD525 units) but I can't say I ever found the dual wire setup to be an issue. The wire runs down about 18 inches to a control pod that has a spot for two AAA batteries (provided), a slide switch to set the force feedback to off, low and high and a dial volume control. The other end of the control pod has a 1/8" mini-jack into which you connect the provided 12-foot stereo mini-jack to stereo mini-jack cable. Note that this cable can be replaced with any other mini-jack to mini-jack cable if you desire. The unit is only amplified when the force feedback is on, but the volume control works all the time. According to the instructions the batteries should last for about 30 hours of force feedback use.

Overall pure sound quality (without force feedback) is quite good, but certainly not nearly as good as Evergreen’s PR material claims (they say it matches many $100-$169 units). In addition to the very slight bass deficiency the midrange is a bit rough compared to the $125 list price Sennheiser HD525. Overall they are not nearly as smooth as the HD525s, but given the significant price difference that should come as no surprise. In fact, if you were to shop around for a set of $60 headphones without force feedback you will be able to exceed the quality offered by the RumbleFX unit, but there would of course be no ‘force feedback’ effect. Taking that into consideration, I think the unit offers a good price / performance ratio. The other comparison that I think is worth noting is that the sound quality of the RumbleFX is considerably better than what you would get from a typical $60 list price 2.1 speaker system and will even match or beat many $100 2.1 speaker systems. On top of that, the 3D audio imaging offered by the headphones in the non-force feedback mode is good. The bottom line is it's all relative, and for many people the quality they offer will be a step up.

With a 32 ohm impedance rating the volume, when plugged directly into an unamplified output such as typical sound card line output, it’s comparable to both the Sennheiser HD525s and Takstar units. I find the level just fine when plugged directly into a Sound Blaster Live but I know that some people complain that volume is not enough to satisfy. The solution, other than enabling the force feedback, is to use a headphone amplifier such as the Boostaroo ($20) or one that Evergreen Technologies will soon be releasing (expected by the end of April).

 

So on to the force feedback overview, testing and conclusion

 

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