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A Coda and an Overture from HeadRoom - Page 2  

post #16 of 481
Thread Starter 
Quote:
Originally Posted by Jahn
Will there be crossfeed on this baby?
You bet; the Coda has crossfeed.

Quote:
Originally Posted by BRBJackson
Speaking of comparisons to the Supreme, was the omission of filter and gain switching strictly a space issue, or were there any other reasons?
Good eye, man. Space was the issue, though at the price of those switches cost is a factor, too. If you look at the board you can make out the if we really squeezed the parts together we might have been able to get one more switch in; and JUST barely, but when we tried the switches got very close to the knob and became fairly clumsy to use. We've set the gain of the amp slightly above the "low" setting on our other amps. The output from the DAC is fairly hot---at least for a portable unit---so we wanted to make sure that the pot to get at least a little off it's stops when running of the DAC and driving UE10s (my absolute favorite IEM).

Quote:
Originally Posted by jefemeister
I'd like to see two more things, accessories really. First, a mini-interconnect that would be the exact length needed to connect the two jacks together when the units are stacked. Since it doesn't have to flex, the "wire" could even be one of those heavy-duty gold posts that are sometimes used in PCB-PCB board connectors.
Well, remember that's a mini-plug and not an RCA so those thick posts wouldn't work. And we do now have those 6" Cardas 90 degree mini-mini cables that work well. We've found that the cable makers really can't make anything smaller than about 6" because they have to have a little slack to get the cable ends into the mold tool.

Quote:
Originally Posted by jefemeister
Second, a wide black "rubber band" (for lack of a better word) that could be slipped over both units to hold them together. You could even silkscreen the Headroom logo onto it. At least an inch wide, maybe even 3.
That's not a bad idea, but we have already thought of it and it has its problems, I can't go into all of them at the moment, but: the trick is when you bring the player into the issue. I've got an iRiver and like to put it on top of the stack. The iRiver, and the Zen and most other HD players have buttons in a variety of places all over the unit. If you put a rubber band around the thing you really want to capture the player, too, and the band would interfere with the player controls---not to mention the fact that you couldn't see the display unless you cut a hole in the band, which would significantly distort when stretched. Sewing a Velcro patch onto the band where you could attach the player might work but you would have to decide whether you wanted to pre-stretch the band before sewing or not, and the band would loose a lot of durability at the seams.

Quote:
Originally Posted by Rickr42
multicolored Velcro straps are available that do just that and are easy to strap/unstrap on the fly
This would be OK, but you'd still have the player problem. A Velcro patch would work better here, though.

Quote:
Originally Posted by Genetic
Could it be simpler with some sort of docking station at the end of both units?
Actually, one concept that seemed to survive discussions very well was making one each two-high front and rear panel that would mate the two (kind of like what we do on the BlockHead but up-and-down not side-to-side)
But that ends up making the units look like one large blob and not a stack of two, which somehow significantly cuts down the cuteness factor.

Personally, I just use Velcro adhesive strips and dots to attach everything together.

Quote:
Originally Posted by andrzejpw
Tyll: any chance of selling the dac seperately? I'd be hard pressed not to buy.
I tell you, Jamey lobbied hard for that; he felt that the DAC alone would sell well, and if it were not a limited edition product we would have gone that way. But, as I say, this little stack has significant meaning in the history of HeadRoom and if we sold them separately there would be less folks out there that had the stack of two to enjoy into the future. But, patience is a virtue; your time will come.

Another couple of things I realze I didn't get around to saying:

Battery life on the DAC is about 8 hours. The positive side battery also runs all the digital stuff and it runs out pretty quick. It's not in the manual but when you change batteries the most efficient use is to throw out the plus side; put the negative rail battery into the plus side; and then put the new battery into the minus side. It runs about 6 hours then but you'll be using up all the juice. For what it's worth I kind of hate 9 Volt batteries as they are quite low in Joules per unit volume compared to AAAs or other single cell round types.

The other thing is that the manual is not quite done so don't worry about hammering us with typos and such we haven't done an edit on it yet. You'll also notice that the pasges are set up so that when it gets printed, stapled and foldes the pages are in order.
post #17 of 481
Quote:
Originally Posted by Tyll Hertsens
I realize I forgot to say that they are $299 each.
That's $299 for the Coda and $299 for the Overture, right?
post #18 of 481
Thread Starter 
Yup.
post #19 of 481
It's good to hear that you're considering releasing some sort of DAC in the future. Especially if you keep that $300 price point(any more and reason starts to play a part ), it's a killer deal. Everyone I've discussed this with seems to think so, as it's a great way for computer audio guys to take a step in. Heck, I'd use it with my laptop at school. Looking forward to seeing what you guys come up with in the future!
post #20 of 481
Overture = introduction in a concert = we can expect a lot of new gear from HeadRoom
post #21 of 481
Quote:
Originally Posted by some1x
Overture = introduction in a concert = we can expect a lot of new gear from HeadRoom



But "Coda" is a conclusion!

Does this mean that Headroom is getting out of the amp business and into the dac business?
post #22 of 481
Hey, can we get a set for the Chicago meet this weekend?
post #23 of 481
Quote:
Originally Posted by acs236
But "Coda" is a conclusion!

Does this mean that Headroom is getting out of the amp business and into the dac business?
The Great Karmak is not even cold yet and.....

It's probably the beginning of something new, not the end of it.

Amicalement
post #24 of 481
Quote:
Originally Posted by acidtripwow
Hey, can we get a set for the Chicago meet this weekend?
Tuberoller should be receiving a set.
post #25 of 481
Quote:
Originally Posted by Tyll Hertsens
Battery life on the DAC is about 8 hours.

It's not in the manual but when you change batteries the most efficient use is to throw out the plus side; put the negative rail battery into the plus side; and then put the new battery into the minus side.

I kind of hate 9 Volt batteries as they are quite low in Joules per unit volume compared to AAAs or other single cell round types.
What capacity batteries was this tested on, the average 150mah ones or the longer lasting 250ish ones?

Which side is the plus side?

The units don't have internal recharger right?
post #26 of 481
The batteries were standard Duracell 9V

The Plus side is marked on both the rear panel and on the silkscreen of the PCB. The silkscreen marking is clearly visible when the rear panel is removed. The Plus side is on the right, when looking at the rear of the unit.

There is no internal charging circuit.
post #27 of 481
Thanks again guys for allowing us unworthy Chicago Headphone fans the opportunity to audition your newest products . I'll never get over the "Headroom Meet Pack" you sent to us in that big ass Pelican case. That was way too cool for words. I'm sure you'll get lots of feedback from attendees of our meet and I'll be sure to post my impressions before and after the meet.


I'm still really digging the fact that you guys saw fit to do a portable DAC. I think too many manfacturers have ignored this market segment and I'm sure this will be followed by others,as usual when Headroom sets the pace. I'm also certain we'll start to see items like digital output adapters for the ipods and other HD and MP3 players. Headroom took the bold step here and I really hope it turns for you guys in a the way I think it will.
post #28 of 481
really nice looking stuff. Is the dac circuit board 4 layers??
post #29 of 481
Thread Starter 
Edit-Joe got it.
post #30 of 481
Both the DAC and the amp are 2 layer boards. The bottom side copper is the ground plane on both boards. For the DAC, we did our best to provide both a low impedance current return for all circuits (i.e. a large copper plane) and to ensure that there was as small of current loop area as possible for high-speed digital traces (i.e. no breaks in the plane below high-speed traces).

Joe
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