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Question regarding DAC in portable desktop

post #1 of 5
3/28/08 at 3:10pm
Thread Starter 
Hi headroomers;

I'm confused about the DAC in the portable-in the info page on the amp, it mentions the unit contains a special version of the desktop DAC.

In reading about your different DAC modules, there is no longer any mention of the desktop DAC. Just wondering if the DAC in the portable has changed to a home based module, or does the portable, due to the battery nature of the amp, continue to use the desktop DAC?

Thanks

M
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post #2 of 5
3/28/08 at 7:37pm
In addition to mackay maus' question, I'd be interested to know if it is using the Desktop DAC how does it stack up/compare to the other DAC's in the lineup?
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post #3 of 5
3/31/08 at 5:11pm
The 'desktop' DAC in the new HeadRoom Portable Desktop Amp is indeed a uniquely specialized version of our older 'desktop' DAC installation, similar to what was employed in our HeadRoom 'Desktop Amp' line of yore.... The 'desktop' DAC topology now only occurs in this new HR Portable Desktop unit.

The desktop DAC uses Cirrus Logic’s flagship CS4398 24bit/192kHz, 120dB dynamic range digital-to-analog converter circuit. Coupled with extensive power supply isolation & regulation, this stage takes virtually any digital input audio source(s) and turns it into an excellent audiophilic listening experience. The desktop DAC board uses the well-regarded Burr-Brown 134 op-amp strictly in single packages; only metal thin film resistors and polyphenylenesulfide (poly film) capacitors are allowed anywhere near the audio circuits. Three low-noise, ultra-low dropout power supply regulators isolate the various digital, analog, and mixed signal circuits.

Cheers,

Jorge
HR Sales/Product Manager
HeadRoom was founded in 1992 & manufactures headphone amps, DACs, and accessories; and sells headphones & related personal audio gear. We offer exceptional products, customer service, & information.
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post #4 of 5
3/31/08 at 5:45pm
Thread Starter 

thanks for the info

Hello;

I appreciate the reply-thanks for answering my question. Great customer support!
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post #5 of 5
3/31/08 at 5:46pm
Quote:
Originally Posted by elnero View Post
In addition to mackay maus' question, I'd be interested to know if it is using the Desktop DAC how does it stack up/compare to the other DAC's in the lineup?
The Desktop DAC does not operate in true 'Class-A' biasing so our current-model HR Micro DAC (basically equivalent to the "Home" DAC) and certainly the HR Ultra Micro DAC with the upsampling stage -- basically the "Max" DAC equivalent -almost! -- are considered slightly superior D-A performers.

That said, the HeadRoom Portable Desktop unit does utilize a Class-A 'Home' electronics module but the DAC is dialed down just a bit in keeping with the rechargeable lithium ps limitations.

Cheers,
Jorge
HR Sales/Product Manager
HeadRoom was founded in 1992 & manufactures headphone amps, DACs, and accessories; and sells headphones & related personal audio gear. We offer exceptional products, customer service, & information.
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