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digiZoid ZO2 Conclusion and Ratings


The old adage that you are hardest on the ones you love is true in the case of the digiZoid ZO2. I really, really like this product. Even if it didn't increase battery life, I think the bass boost is one of the cleanest and most natural I've heard. The large number of adjustable levels means you can fine tune your experience to your exact preferences. The small size and light weight makes the ZO2 easy to transport and use in multiple situations. While the product is not perfect, I think its performance easily justifies its price.

At $120, I don't think everyone will agree with that last statement. The digiZoid is certainly a niche product for those that really love their headphones and crave gadgets. With the large increase in volume taking some of the pressure off your phone's battery and a built-in analogue bass boost, the ZO2 performs as promised. If I found one of these in my Christmas stocking, I'd be thrilled. I'm betting a lot of other audioholics would react the same.


digiZoid Z02 Personal Subwoofer

$119.95 (free worldwide shipping)


The Score Card

The scoring below is based on each piece of equipment doing the duty it is designed for. The numbers are weighed heavily with respect to the individual cost of each unit, thus giving a rating roughly equal to:

Performance × Price Factor/Value = Rating

Audioholics.com note: The ratings indicated below are based on subjective listening and objective testing of the product in question. The rating scale is based on performance/value ratio. If you notice better performing products in future reviews that have lower numbers in certain areas, be aware that the value factor is most likely the culprit. Other Audioholics reviewers may rate products solely based on performance, and each reviewer has his/her own system for ratings.

Audioholics Rating Scale

  • StarStarStarStarStar — Excellent
  • StarStarStarStar — Very Good
  • StarStarStar — Good
  • StarStar — Fair
  • Star — Poor
Audio PerformanceStarStarStarStar
Build QualityStarStarStar
Ergonomics & UsabilityStarStarStar
Ease of Setup/Programming/IntegrationStarStarStarStar
Fit and FinishStarStarStarStar
About the author:
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As Associate Editor at Audioholics, Tom promises to the best of his ability to give each review the same amount of attention, consideration, and thoughtfulness as possible and keep his writings free from undue bias and preconceptions. Any indication, either internally or from another, that bias has entered into his review will be immediately investigated. Substantiation of mistakes or bias will be immediately corrected regardless of personal stake, feelings, or ego.

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Recent Forum Posts:

Anderssen posts on January 14, 2013 22:47
Your reading comprehension sucks, JohnA. It is NOT an amp with bass boost. Read every available review and they all have great things to say about this product – and that it is much better than what a Fiio + EQ will give you.
JohnA posts on September 26, 2012 17:13
So it is a Headphone preamp with bass boost:

So I can get this one for a whole lot less and use my EQ settings to boost the bass:

FiiO E11 Headphone Amplifier 230-106
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