I have owned a Brooklyn DAC for around 5 months now, and agree that it sounds excellent on all resolution sources. I am using the variable pre-amp output to drive my amp directly, and it does a great job. I urge anyone who owns one to try powering it with a good external DC power supply. It made a BIG improvement in clarity, detail and energy over the internal switching power supply.
Correction; The article's author is another JA: Jim Austin.
My sincere apologies to Jim Austin, I’ve no idea what his speaker reviews are like. I read John Atkinson on the measurements and somehow believed he was the article’s author, or I messed up which JA I meant, in either event, my bad.
@bigshutterbug What power supply did you end up using?
I tried 3 different power supplies on the Brooklyn....An HDPlex 100, a Keces ,and one "non-audiophile" one, which is built like a tank and quite affordable... An Astron RS-12A. I found the HDPlex and the Keces were quite "soft" sounding, and did not improve detail or imaging. I read a post on Computer Audiophile about the Brooklyn, and someone mentioned the Astron, which is American made. I picked up a used one for well under $100. It puts out 13.8 volts, but can be turned down to 12 volts by adjusting it inside. To my surprise, the Astron sounded fantastic, with a lot more clarity, energy, and detail. I had also tried various AC cords going to the Brooklyns own power supply, which just resulted in modest tonal changes to the sound.
Thank you! I found a version with V and A meters I will have to try.
One last thing, what was the DC plug you used? Do you remember? I imagine I'll have to make my own.
Yes, the Astron VS-12M is the variable voltage and amperage version of the RS 12A that I am using on my Brooklyn. I am also using a VS-12M on my Microrendu with similar results. I have a local audiophile friend who I just visited with yesterday, who tried a VS-12M on his Tortuga based LDR pre-amp, and we were both quite amazed at how good it sounded in his rig. I am using some simple, affordable ends I found on E-Bay, which, tighten down on the wires with small screws. The make it easy to experiment with different types of wire for the DC leads.....The type of wire used can also make a noticeable tonal difference. I have tried dozens of different types of wire, from ultra-pure stranded and solid core copper, to stranded and solid core silver and silver plated copper of all sorts.
@bigshutterbug Sorry I should have been more specific.
What was the external diameter of the DC jack? :)
5.5mm x 2.5mm CCTV camera DC Power Male Jack Connectors
If you search for the above description on E-Bay, you will find them. I would suggest not using a heavy gauge wire for your leads, and keep them as short as you can. After spending over $100 on various "audiophile grade" exotic wire, I found that my favorite was the cheap black wire that I pulled off a wall wart power supply....go figure!.
do the filters and the associated changes work
noticeable or kinda?
To be honest I haven't tried them out. I've moved, then I got pretty sick, so my listening location isn't ideal. I am using the default filter that ships with MQA enabled, so slow roll off I believe.
I have discovered that the MPH filter and the FR filter both sound very similar, but the SR filter does roll of the very upper highs a bit. This was confirmed by the Stereophile tests, which found the SR filter reduces the highs by 3db.
I'm trying the FR right now. It is very similar, but I think I'm getting more imaging past the speakers. Have to listen more with known tracks. :)
So it took me a bit to really get used to the FR. It seems to have an accentuated transient edge, and more imaging, but there was definitely some time in my ears adjusting to it. I would say it’s worth trying, but I don’t think the difference between minimum-phase and fast-rolloff filters is going to move the Mytek Brooklyn up or down in anyone’s list of DAC’s except in imaging. If you feel that's lacking in MPH, definitely try FR.
I just took delivery of an Astron with variable voltage and current. I ordered it from AstronDistributors.com and they were well priced and fast. UPS ground was not too bad.
Astron has a rock solid output. Meter says 12V, actual output is closer to 12.3. I'm leaving it alone. Usually when you measure a regulator circuit you'll have little fluctuating voltage readings. 12.29, 12.27... but not here.
I'm using a short run of 14 guage speaker cable to a little adapter with screw terminals. The markings on the plug guided me for polarity.
The current meter says the Brooklyn is only drawing about half an amp.
So this may seem like overkill, but this power supply has just a rock solid output with such a little load.
So far pretty good, but let me get more used to what I'm hearing.
Erik, I agree with your assessment of the sound of the FR filter on the Brooklyn. It does accentuate the leading edge of notes and attack more than the SR or MPH filters. If I am listening to a forward or edgy recording, I like the MPH or SR filter a bit more, but the SR filter is not quite as extended in the upper highs.
Be sure to try a different type of wire from the heavy 14 gauge speaker cable going to the Brooklyn from the power supply. I found the heavy gauge wire to make it sound dark and overly warm. I know it sounds silly, but the cheap, black 22 gauge stranded copper wire you find on small, wall wart power supplies sounds much more neutral and better balanced all around. It beat out all of the various, expensive, ultra-pure copper and pure silver wire I tried. You don't need a heavy gauge wire to supply the Brooklyn. Try to keep the wire as short as possible too.
My local audiophile friend just ordered a second RS12A from Astron, and had them set it up to put out 19 volts so he could power his audio computer with it. They did not charge him extra for the custom set-up. It took a few days of constant use for his new RS12A to break-in and settle down, but once it did, he is enjoying the results. Leave yours powered up for a couple of days before any serious listening, and DO try that cheap wire!
I'd rather stick with what I'm using, also cheap, but i may put a very nice 0.1uF film cap across the ends. :)
My version of the Astron has a voltage dial, so I'm all set so long as no one changes it. :)
Do you guys have connected the ground on the Astron and where?
No need. Just the banana plug outs to a mini-jack like this one:http://amzn.to/2neIAEB
Just make sure you observe the proper polarity on the plug.
thank you so much, I ordered my Astron and wait to receive it and connect.
Wich its the best brand USB cable for the Mytek Brooklyn?
The brooklyn is pretty insensitive to USB cables. If you are feeding from a Mac, be careful to isolate the power supply. Try on batter power as well as plugged in to hear a diff.
Now I have the Audioquest Cinnamon USB so I was thinking about to upgrade to Nordost Blue Heaven usb but if there's no improve on sound quality I'm gonna keep my Audioquest.
One thing I've missed on the Brooklyn it's the fire wire connection the I have on my Mytek 192, huge difference on sound quality versus usb.
bigshutterbug: You offer excellent advice regarding AC power wire thickness; perhaps it's a combination of 'more wire' (lower gauge) but also the thicker insulation/dielectric used.
My experience mirror's yours; thinner wire/sheathing (harder sheathing the better) sounds more open, neutral and balanced -by a large margin.
This can also apply to pre's, power (not #22,but #14 ga. is plenty(, CDP's, Balanced/Symmetrical AC power supplies/'conditioners, etc.
Perhaps there are 'heavier' power cables that match well with specific components, but look for something lying around the household and experiment. (Make sure you let cable "re-settle" for a few minutes (5-10) before assessing -although changes in sound are often immediate.
Once again, you offer priceless advice from personal experimentation and observations. Not many share such valuable insight.
zorro: I have the amazing AQ 'Carbon' USB cable (1.5m). I believe you'll appreciate the step-up to the Carbon.
bigshutterbug (and others): Is the RS-12 high-current really necessary? More specifically, has anyone used Aston's 3-5A model ?
I just got my Astron RS-12A and bought it the 5.5mm x 2.5mm CCTV camera DC Power Male Jack Connectors but the plug it doesn't fit on Brooklyn
I just order the right connectors and everything works beautiful