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Author Topic: USBPre 2 > SPDIF > MicroTrackII for the field ?  (Read 12037 times)

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Offline tedyun

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #60 on: May 31, 2011, 06:00:38 PM »
It depends how much current is coming out of the USB port on the ISOUND. I think the standard is 0.5 A, but some batteries put out more. I have some USB batteries that can power it, and some that can't. I can vouch for the Tekkeon MP3450. The USB port could power the 661 (although I never tried it with the phantom on).

I have an Oade SuperMod PMD-661 that is sort of for sale:

http://taperssection.com/index.php?topic=143903.msg1854301

If you're interested, PM me


If I understand, that means that both, the PMD661 and the USBPre 2, may be powered via USB, right?

That brings back the ISOUND power back option, a bit cheaper, a bit lighter and even more capacity (even though most likely not necessary). Why should I spend more?

PS: ISOUND  2.4 A
 8.000 mAh = 45 U$D
16.000 mAh = 77 U$D

Even, 8.000 mAh might be enough.
Mics: B&K 4011, Schoeps MK5 (Nbobs, Naiant PFA), Busman BSC-1 (K11/K21/K31/K41 caps), Church CA-14 (o, c), Church CAFS, Core Sound Binaurals
Pre: EAA PSP-2,  Lunatec V3, Nbox-Platinum, Church CA-9200
ADC: Mytek 192 ADC, Oade Mod SBM-1
Rec: Oade Supermod PMD-661, Tascam DR60D, M-Audio MicroTrack II, Korg MR-1 (32GB SSD mod); Sony PCM-M10, Edirol R09HR; iRiver HP-120
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Offline nino

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #61 on: May 31, 2011, 09:48:09 PM »
As discussed above, the documentation mentions 2.4 A for ISOUND, which should be enough for both, the 661 drawing 0.84 A + the USCBPre2 with a maximum 1 A (limit of USB, which is what it is designed for) = 1.84 A total.

Quote
PS: ISOUND  2.4 A
 8.000 mAh = 45 U$D
16.000 mAh = 77 U$D


Offline rastasean

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #62 on: May 31, 2011, 10:44:49 PM »
Let us know when the battery comes in. Personally it looks like something that would charge iphones, itouch, ipod, ipads but should work nice for the pmd661.
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Offline mikycoud

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #63 on: July 12, 2011, 12:44:33 PM »
Hi,
Did you ever try that iSound USB battery for your PMD661 and did it work Ok?
I'm thinking of getting it to power my USBPre2/PMD661 combo but, just like you, am wondering about the 1.5A the PMD661 supposedly needs vs the 1A max the Isound can deliver.
Any feedback?
Thanx

kirk97132

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #64 on: July 12, 2011, 03:23:31 PM »
As discussed above, the documentation mentions 2.4 A for ISOUND, which should be enough for both, the 661 drawing 0.84 A + the USCBPre2 with a maximum 1 A (limit of USB, which is what it is designed for) = 1.84 A total.

Quote
PS: ISOUND  2.4 A
 8.000 mAh = 45 U$D
16.000 mAh = 77 U$D

USB max is 500mAh.  USBPre2 uses less than that. I have specs from SD somewhere but total draw would be dependent on mics used with the USBPre2 but absolute max draw from the USBPre2 is 500 mAh. 

Specs from SD:
With two condensers on the inputs, gains at a healthy level and headphones with headphone gain at a normal level, you can expect between 175mA and 275mA draw(approximately).
« Last Edit: July 12, 2011, 03:27:47 PM by kirkd »

Offline mikycoud

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #65 on: July 13, 2011, 03:21:19 AM »
Thanx Kirkd for your reply.
I was more worried about how the power was shared across both outputs. Indeed, I've tried devices in the past that were rated adequately for my intended purpose, and worked OK when one device was connected, but with very unpredictable results when 2 devices were hooked up together. Hence why I was asking for 'real' tests to Nino.

But it's OK now, as I've found a picture of the bottom plate of the iSound which shows all the info I wanted:
2.1A on each output
2.5 together

SO I'm confident it'll run both my devices perfectly!

On a different topic (but still related to the PMD661), do you have experience feeding to its SPDIF input a standard AES3 signal via the appropriate converter cable?
Some say it'll work, some say it's doubtful, but no one seems to have ever tried it...
My idea was to go Mixpre D AES3 out>XLR to RCA cable (very short lenght)>PMD661 SPDIF input

(I've posted this in another sub forum on this site, but since this thread seems to be all about the PMD661 at this point, I figured you might be able to answer my question...)

Thanx for any input

kirk97132

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Re: USBPre 2 > SPDIF > MicroTrackII for the field ?
« Reply #66 on: July 13, 2011, 11:13:39 AM »
Can't help with your AES/SPDIF.  Never ran a Marantz unit.  FWIW the Tascam DR-680 I have will accept both is built to do so.  I believe there is a Rane site/article that may help with that info.  Sorry I don't have a link

 

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