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Lynx Hilo - new offering from Pro Audio company. - Page 15

post #211 of 641
I guess we take the covers off then for pics.......us adolescents are so rebellious.
post #212 of 641
Quote:
Originally Posted by Happy Camper View Post

I guess we take the covers off then for pics.......us adolescents are so rebellious.

 

 

OK.  Sounds good.  You first! :)

post #213 of 641
I"ll have to hire a film crew, lights and staging, gaffers, fluffers, etc. so right after I finish this cure for cancer and separation of brain joined twins. Say, noon tomorrow?
post #214 of 641
Quote:
Originally Posted by Happy Camper View Post

As for the shootout, I still want to do this but not at a meet. Too much going on. I'd really like to listen to each DAC for an evening with the same material covered. We'll need to figure out a means of doing that.

 

A two-week group rental in the Outer Banks in July?

post #215 of 641
Quote:
Originally Posted by burnspbesq View Post

A two-week group rental in the Outer Banks in July?
Can we have small Asian women walk on our backs and a chef on a dive boat?
post #216 of 641
Thread Starter 

It's been a while since I used the internal headphone amp on the Hilo, so gave it a run last night. At really low levels it sounded fine, but as soon as I brought it up to a decent playback lever, I heard noise/distortion. So much so, that it was impossible to listen to anything. I tried 2 different headphones, and had the same result. Today I will fire it up again and see if it remains the same. What a bummer!!!

post #217 of 641
Quote:
Originally Posted by santacore View Post

At really low levels it sounded fine, but as soon as I brought it up to a decent playback lever, I heard noise/distortion.

You may have a similar problem as HappyCamper described recently in this thread.

 

Do check the levels of your inputs and outputs, both digital and analog for each. It's easy to overlook one setting because the screen doesn't have space to show all the information at the same time.

post #218 of 641

I encountered this as well when I first started using the Hilo.  The situation has happened a few more times during use.  Every time it has had to do with input levels being set incorrectly.

 

The Hilo is a piece of Pro Audio gear and as such offers more levels of control and adjustment than most consumer hi fi equipment.  The nature of the interface is such that unintentional adjustments can be missed.  As I have gained more experience with the use of the Hilo the control of the interface has become second nature.

 

When properly set up, the head amp on the Hilo is capable of driving my LCD 2's at full volume without distortion.

post #219 of 641
It is a bit different beast. I have turned everything off but the line in and out then dropped the trim to 0db and last drop your input to 0db.
post #220 of 641
Quote:
Originally Posted by Happy Camper View Post

It is a bit different beast. I have turned everything off but the line in and out then dropped the trim to 0db and last drop your input to 0db.

 

 

Good settings to start with.  I have found that for my situations going above 0db on the input level has the potential to most negatively affect sound and cause distortion.  Output trim levels for most consumer gear are fine to +6dBV.  My Yulong headphone amp seems happy right up to +20dBu.  To be safe I usually leave everything set as you have described.

post #221 of 641
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Edited by Happy Camper - 3/19/13 at 6:08pm
post #222 of 641

Not sure we've solved the mystery yet.  The datasheet for the Burr-Brown PGA4311 describes it as a high-performance, four-channel volume control.

 

http://html.alldatasheet.com/html-pdf/86709/BURR-BROWN/PGA4311/501/1/PGA4311.html

 

Here's a link to the current TI DAC chip product line.

 

http://www.ti.com/lsds/ti/audio-ic/audio-dac-product.page
 

post #223 of 641
Damn. K when I get home
post #224 of 641

So while HC was over listening to the new speakers, we opened up the Hilo and i grabbed some pics of the chips in question.

 

 

So its got 2 CS5381 ADCs i would assume in dual mono differential configuration for the analog inputs

 

 

It's also got 3 CS4398s doing DAC duties. Two I'm assuming are in dual mono differential mode for the line outs, and the 3rd one is probably in stereo mode for the monitor outputs.

 

 

There is also a 4th CS4398 doing DAC duty in the headphone section, it also uses LME49600s as the output buffers for the headphone output.

post #225 of 641

Tried and true technology (the Cirrus converter chips were introduced ten years ago this coming Sunday), well implemented.  Gotta love it.
 

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