Taperssection.com
Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: Chuck on August 02, 2009, 01:55:19 PM
-
** Grace Lunatec V3 vs Naiant littlekit (INA111) pre-amp comparison **
Source (AUD): AKG C 480 B comb/ CK61-ULS > Segue Dogstar cables > splitter feeding (2) iRiver recorders.
Microphone configuration: DINa, center, 7' up
The exact same pair of microphones were feeding both pre-amps and were split with a passive microphone splitter cable.
Phantom power was turned OFF on the V3.
48v phantom power was turned ON on the littlekit.
Two iRiver iHP-1x0 recorders were the bit buckets.
The analog files(s) were recorded LINE OUT from the V3 & littlekit pre-amps to iRiver recorders set at 0 gain.
The digital file(s) were recorded OPTICAL OUT from the V3 to an iRiver recorder at 44.1kHz, 16 bit, stereo.
These are the raw files exactly as I recorded them, with no post editing or processing done.
I tried to get the best levels and balance set in the field.
File01.wav
File02.wav
File03.wav
File04.wav
Each of the audio files are one of these configurations:
mics > V3 *analog out* > iRiver
mics > V3 *digital out* > iRiver
mics > littlekit *analog out* > iRiver
Notes on the Naiant pre-amp...
My littlekit pre-amp is a little different than the littlebox pre-amps Jon is selling now.
The pre-amp is powered with (5) 9v NiMH batterys. So, there are no DC converters used to power the instrumention amps. The (5) 9v batteries also supply 48v DC phantom power to the microphones without DC conversion. My littlekit pre-amp has the Burr Brown INA111 instrumention amp chips in it.
Download the file V3_littlekit comp.zip here:
http://www.filesavr.com/v3littlekitcomp
Thanks to ToddR for advice and doing this similiar comparison:
http://taperssection.com/index.php/topic,124895.0.html
I'll give it a few days before revealing the identities of the files on this thread. ;)
edit to add photo
Don't go past page 1, if you want to listen to the files unbiased... ;)
-
Ooopppsss... forgot to name the source material :-[ ...
Phish at Red Rocks 08-01-2009
-
WOW again I just can't really tell much of a difference....oh yeah I have to remind myself again $1300+....
I will have one of these once the final version is set in stone.....
Thanks for the comp.......
Peace OOK
-
I'm not hearing a whole lot of difference. That's pretty amazing.
-
I've got both set up side by side, and I keep clicking over from one to the other. I'm having a hard time telling which is which. Samples 1 and 3 sound slightly less cluttered, if that makes any sense...just a little tighter somehow. Can't wait to find out the results.
-
1st of all.....great sources! Phish at RR sounds spectacular. I noticed a little "airy"-ness on the 3rd source that made it more preferable on HH. On Antelope I heard a similar "airy" quality to 2nd source. But damn if they don't sound very close. Wicked preamp at that price!
-
Oh wow, this should be fun. I'll have to play on a night when all the neurons are firing. This is either a test of gear or hearing depending on how you view things. I hope to get things grossly wrong to further confuse myself so that I can get over gear and get back to taping... well perhaps not.
-
Apparently, Filesavr doesn't like Firefox... the file wouldn't download.
-
Apparently, Filesavr doesn't like Firefox... the file wouldn't download.
Works fine for me.
-
Apparently, Filesavr doesn't like Firefox... the file wouldn't download.
PM me and I will get you the files, if you can not DL from the link I provided.
Also check out my Phish C-481 > littlebox source:
http://taperssection.com/index.php/topic,125313.new.html#new
-
Nice comparison. I like 2 and 3, but they both do sound pretty similar. Great tapes!
Jesse
-
I would say that files 1 and 4 seem to have a more rigid, stiff sounding bass. My guess would be these are from the same preamp?
2 & 3 seem to have a bit warmer but slightly less accurate sound.
I'm finding it hard to decide since objectivity recognizes the merits in both, but if pressed I would say I prefer 2&3, the sound may not be as accurate sounding but it seems truer to life for some reason.
They're both quite nice, that Naiant pre certainly is holding its own whichever samples it produced. I'll be interested to see if I'm even right about which 2 came from the same pre.
I did the comparison on a Bose "Companion 5" computer speaker system which in general I find to be extremely neutral sounding.
Oh and... nice pull :)
J
-
I'm going to hold out on revealing the results for one more day.
Just to make sure that everyone who wants to listen without being biased by knowing the file identities gets a chance to listen.
...but, if you PM me and swear not to tell, I'll give you the the file identities.
-
I liked source 2 the best! I really couldn't hear that much difference between the other 3 sources. Sounds great regardless and solidifies that fact that I want a littlebox. They sound great for the money! Nice job chuck and I look forward to finding out what is what.
-
Thanks for the offer on revealing the identities via PM but I can wait for the official curtain to raise. Cheers :)
-
Here is the link to the file identities txt file:
http://www.filesavr.com/v3littlekitcomp-results
I figured I'd do it this way, in case someone stumbles on this thread late and didn't want to see the results posted in the open.
The next post reveals the identities of the files. Don't read past this post unless you want to know the results of the comparison...
-
Well, I put a disclaimer up on the thread, so lets discuss...
file01.wav is: mics > V3 *analog out* > iRiver
file02.wav is: mics > littlekit *analog out* > iRiver
file03.wav is: mics > littlekit *analog out* > iRiver
file04.wav is: mics > V3 *digital out* > iRiver
-
holy shit. Had me fooled....
-
In your comp as well as Todd's, I can't tell which two sources are the same. If my ears can't tell a difference, then there goes my "I can't afford a preamp" argument.
-
Yeah, I can't help but think there was a flaw in my method... ??? I did e-mail Jon at Naiant before I ran the test with the splitter cables. I'd rather not paraphrase what he said, but it didn't sound like my methodology would be a real problem.
I didn't set out thinking it would be all that close. I did prefer the littlebox on ToddR's comparison though...
FWIW, I used around 20-22 db of gain on the V3 when going analog out and around 35db when going optical out.
I had the knobs on my littlekit set between 11:50 and 12:10 (clock face) for both sets.
As for my probably biased observations by knowing which file was which using HD600 head phones and Tannoy Reveal (with subwoofer) speakers:
My quick notes are:
1 and 2 are very close sounding, very little difference
1 has slightly wider sound stage, but more confined sounding, not as open as 2
2 is more forward and open sounding
3 is open, more forward, maybe more hollow, with a slight upper-mid range bump than 4?
4 is warmer, more refined than 3?
That said, I generally prefered 2 & 3 overall on the source material I recorded.
edit to add:
I find the littlekit recording to be more involving, if that makes any sense...
I have listened to it (near field speakers and on headphones) three times, all the way through, and I get sucked in every time.
The full recording can be found here:
http://bt.cotapers.org/torrents.php?id=129&torrentid=166
ยป FLAC16 / 44.1k / AUD / C-481 > littlekit
-
Jon, the V3 has balanced outputs, too. I used Pin2 hot, Pin1 ground and left Pin3 unconnected as the V3 manual suggests for un-balance output. Maybe that was enough to make a difference in the analog out recordings. ??? But, like you, I was surprised that the V3 digital out and the littlekit analog out recordings sounded even close. I think it says a lot about your pre-amp, to hold it's own, against what many regard as the standard for field recording.
You should listen to the files... I can rename them and sent them to you... if you want an unbiased comparison ... you may become a Phish phan :)
-
The analog outs pumped a much hotter signal then +4 on the V3. Your levels on the box may say "-3", but your putting out in the positive teens. This is for the assumption that your putting it into another pro box (like an SD unit, or R-44) which can handle that hot of a signal.
http://taperssection.com/index.php/topic,113926.msg1524480.html#msg1524480
Courtesy of Jason's handy diagram, it's a difference of 19db (with an unbalanced configuration), which generally correlates with what you used in the test give or take a few db.
edit: added unbalanced note.
-
+4dBu is a nominal level, the theory being that should be the average (RMS) level of the recording, leaving sufficient headroom above for peaks. I do note from that chart that the V3's balanced outs have both pins driven (no surprise there), which accounts for the 6dB difference.
Anyway, if the gain used for analog on both recorders is the same (and it should be), then for that comparison both boxes are seeing the same internal levels. The active balanced out on the V3 would be generated by sending the + output to an inverting amplifier, such that the voltage seen by both amps is the same (but opposite polarity). So floating pin 3 on the V3 and just pulling signal off pin 2 should be a direct comparison with the unbalanced out littlebox.
According to the chart, as expected, the V3 makes itself generate +4dBu levels for its converter, which is unfair to the V3 digital as it has to run hotter to achieve the same digital level as the iRiver. That's not my fault though . . . the iRiver probably doesn't peak at 0dBV (+2dBu), it probably has similar digital "headroom" of +5dBV, so that makes the same 15dB headroom for the expected and measured 12dB difference in gain.
Gotcha, I was trying to reconcile the math discrepancy. Thanks.
-
So is this correct:
Littlekit = Chuck
Littlebox = Jon
-
So is this correct:
Littlekit = Chuck
Littlebox = Jon
Jon can tell you the exact differences between the two, better than I can.
I bought the littlebox circuit from Jon. It's pretty much the same circuit as the production units he sells, but I don't have metering or DC conversion on mine.
I built the box around it and mounted my own jacks and switch. I call it a littlekit to distinguish it from the production pre-amps Jon is selling.
-
I thought that the sources in this comp were much closer than the ones in Todd's. I preferred 1 and 4, but they were very, very close. I liked source 1 the best, but then again, I have always preferred Antelope to Dirt so that probably had more than a little to do with it. Like in Todd's comp, the midrange of the Littlekit / Littlebox stood out more than I prefer and the sound was more cohesive than in 2 and 3. As I said, however, I thought that they were very close and while I felt that the price differential between the V3 and Littlebox was justified in Todd's comp, it is not justified to me in this one.
Thanks for doing the comp! And the next time you do one, please, please, please choose a different song than Dirt.
-
And the next time you do one, please, please, please choose a different song than Dirt.
Will do...