First, thanks for all the good comments, they ran pretty much as we expected.
We've decided that we will not have crossfeed in the next version of the AirHead/BitHead, here's why:
We find that crossfeed is used by roughly half of our customers regularly. It's not the slam dunk we think it should be. We strongly believe in the theory, but find that many are just used to the presentation headphones give naturally and prefer that. So, the first point is that it's only used by half our customers.
Even when a customer does use it, it's not particularly easy to hear. We find that we very often get calls from customers wondering if their unit is broken because they can't hear the crossfeed turn on. We think it's a good thing that the crossfeed is subtle, but it does create some extra work for us as we talk people through the process of testing it on the phone.
The lower the cost of electronic circuitry around it, the more it degrades the sound quality when turned on. One thing we've noticed over the years is that as electronics got faster and cleaner sounding, the 'muddying' effect of the crossfeed has lessened. Saddly, that means that on the less expensive products, the blurring effect of the crossfeed is more noticable. This is worst with the AirHead/BitHead.
Even with the crossfeed off, we still need to have an input buffer and a summer stage that we don't need if there is no crossfeed circuit. This ads two extra active stages of circuitry which degrades the potential sound quality achievable. It also adds parts cost.
Those are the technical issues, now for some marketing logic.
The target demographic for these products are entry level audiophile, and below. It's very likely that the average customer of the AirHead has never heard of a headphone amp before. It is the job of this product to carry the idea out there into the mainstream audience that such a thing as a headphone amplifier exists, and it can significantly improve your listening experience. If that's all it does, it will have done well. To add to that the burden of having to educate the consumer about crossfeed and the psychoacoustic problems it solves may be more than this little product can bare. These customers aren't expecting crossfeed; they don't have any idea what it is; and it will likely make the product harder, not easier, to sell due to the more complex benefit statements that are required to transmit to the user.
It is extremely important that when someone plugs in to an AirHead (it won't be called that BTW) the sound quality improvement is clearly audible. Since, for the most part, customers won't even be using very good headphones, it is critical that the amp be extraordinarily clean sounding and authoritative.
Lastly, we want to make this product as small and thin as we can, the crossfeed circuit will likely force us to make it slightly bigger than we would like. And, it will make it less expensive to build, we'd like to include two parallel headphone jacks and two parallel input jacks, so that customers have a choice as to the orientation of the input and output plugs, and to have a spare if the jack begins to fail (saddly a common occurance with 1/8 mini jacks.
To summarize, the new AirHead/BitHead will not have crossfeed because:
- That demographic doesn't expect it.
- They wouldn't know what it was or how to test it if they had it.
- We want to 'WOW' them with sound quality.
- We need the unit to be as inexpensive as possible.
- We don't want to make the space for it and increase the size of the amp.
- We'd like to spend the money on other features.
I'd love to hear any additional comments you guys have, if any.