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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 234

post #3496 of 6943
Quote:
Originally Posted by gibosi View Post
 

 

 

Thanks for your recommendations. I had a chance to try the Modi and found that it was a bit bright and decided against getting one. And many people have said the the Modi and the ODAC sound the same, so I hadn't really considered it....

 

At this time I really don't need 24Bit, but I feel that optical on my DAC, which is 24Bit, sounded better than USB. But of course, there might be other reasons.....

http://www.canuckaudiomart.com/details/649083120-audinst_hudmx1_highend_usb_dac_with_headphone_amplifier/

 
 

Found this on Canuck AudioMart never heard them but who nows.

post #3497 of 6943

I have ordered 3 different tubes.

 

6AQ6 SYLVANIA

 

RCA 6DT6/6DT6A

 

1680 IBM 6BE6 

 

Overall which one is the best or another to put it is, what are their strengths and weaknesses?

 

Also, what is the burn in time for each tube?


Edited by Sony Slave - 10/14/13 at 12:22pm
post #3498 of 6943

Imho, as far as DACs are concerned, I still find the Little Dot DAC_1 to be a very solid performer. I don't know if I would buy it again, two and a half years later, considering all of what's out there, but it's never disappointed me yet!

 

It's got the same DAC chip (single, not dual) as the Dacmagic, a toroidal transformer, Toslink & Coax inputs for the usual culprits, a pretty good (16bit 48kHz) USB implementation, and also a bonus 75 ohms BNC input (which I've been using for over a year). Like the Dacmagic, you get balanced outputs too.

 

It's decently priced, excellent if you replace the stock opamps (stock is already a great opamp, but why not use the best?) with two double AD797BR(Z); and a giant killer if you pair it with a quality -battery powered- USB -> S/PDIF interface (which also gets you beyond the 16/48 USB limit).

 

Sure, there's metric tons of decent sub-$400 DACs nowadays, but few get you a nice DAC chip, a nice power supply, good USB, and also a true 75 ohms input and balanced outputs.

 

I use a LD DAC_1 with a M2Tech Hiface 2 and my DIY 5V battery pack (easy to make, honestly, and a colossal improvement with the Hiface!), and have -surprisingly- not felt the need for an upgrade yet, which is very unusual for a head-fier...

 

I probably will breakdown someday, and buy an I2S input DAC with a battery powered USB -> I2S section; but for now and until the technology gets up to par, I'll just stick with the DAC_1...

 

Speaking of change, I've tested my second no-silk-screen EI ECC83 tube. This one actually has an inner structure that looks closer to and is oriented the same way as the old Telefunken production. It sounds very similar to my other EI tube, but might even be a tad better. I got lucky, since both tubes aren't microphonic at all, but the Yugoslavian quality control is indeed horrible: that second tube actually has a lame pin! At first, it seemed like it has been chopped or broken, but upon closer investigation, that pin is just stuck in the glass, two millimeters above the others!! Lackluster QC at best... Sounds awesome though. Seriously.

post #3499 of 6943
Great info on the DAC_1, I was pondering this as an addition to the MKIV keeping case style and so forth. Now I don't know, the DAC_1 or an Audio-gd product...
post #3500 of 6943

I am a 'ODAC' fan and use it currently with my 4se test rig. If you are just after a USB input it is a fine product.

post #3501 of 6943

Thanks for all the DAC recommendations. I'm not in any hurry, so will take my time to look into them.

 

Cheers :)

post #3502 of 6943
Quote:
Originally Posted by gibosi View Post
 

Thanks for all the DAC recommendations. I'm not in any hurry, so will take my time to look into them.

 

Cheers :)

Have you looked into the Schiit Modi? $111 shipped new . You can find it even cheaper in the classifieds.

post #3503 of 6943

This is the choice from Audio-gd and a screaming deal to boot, 32bit 384K USB / Coax / Optical

http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN.htm

:beerchug:

post #3504 of 6943
Quote:
Originally Posted by Sony Slave View Post
 

Have you looked into the Schiit Modi? $111 shipped new . You can find it even cheaper in the classifieds.

 

I actually had a chance to try the Modi and found that it was a bit too bright for my taste. I was quite disappointed as they are a very good buy otherwise.....

post #3505 of 6943
Quote:
Originally Posted by gibosi View Post
 

 

I actually had a chance to try the Modi and found that it was a bit too bright for my taste. I was quite disappointed as they are a very good buy otherwise.....

Tbh, the Bifrost Uber isn't doing much for me either, but I will give it one last shot. This time with some new RCA 6DT6 tubes for the little dot.

 

Onto another subject though, do any of you guys know the most detailed OP amps out for the Little Dot 1+?

 

What op amps are you guys running, currently i'm using the lme49990.

post #3506 of 6943
Quote:
Originally Posted by TrollDragon View Post
 

This is the choice from Audio-gd and a screaming deal to boot, 32bit 384K USB / Coax / Optical

http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN.htm

:beerchug:

 

The LD DAC-I or this NFB-15.32....  An interesting choice. With shipping, both of these units are about the same price. However, one is a dedicated DAC and the other is a DAC/amp. It could be argued that with the NFB-15.32, I am buying something I don't need, the amp, and I wonder how much this unit would cost if it didn't have an amp? But on the other hand, this is listed at a "promo" price and it may well be that this unit usually costs more....

post #3507 of 6943
Quote:
Originally Posted by Sony Slave View Post
 

Tbh, the Bifrost Uber isn't doing much for me either, but I will give it one last shot. This time with some new RCA 6DT6 tubes for the little dot.

 

Onto another subject though, do any of you guys know the most detailed OP amps out for the Little Dot 1+?

 

What op amps are you guys running, currently i'm using the lme49990.

 

The LME49990 is the most neutral and detailed op amp I have heard to date. That said, I just pulled the trigger on a MUSES02 as a number of people have rated this op amp even better. However, it was not cheap, so I hope I am not disappointed..... 

post #3508 of 6943
Quote:
Originally Posted by TrollDragon View Post
 

This is the choice from Audio-gd and a screaming deal to boot, 32bit 384K USB / Coax / Optical

http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN.htm

:beerchug:

 

My take on the offering.  Price is $235.00.  Plus, add in about $45.00 / shipping as well as PayPal fees, and you'll have a "close" accurate estimate to the cost.  I see options for the DAC end and the ESS Sabre is listed.  Normally, on their gear, the ESS Sabre is usually more costly and I suspect the Wolfson, would come standard - or, that's my impression.

 

Now.  About Audio-GD.  I currently have the "FUN" model, which is similar inside to the Compass / Compass 2 model with respect to power, power supply, etc.   My built in DAC features 2 - Wolfson chips and I'm using the "Earth" op module, which is about their most neutral offering, when compared to the "sun" - a bit more detailed on the upper end, and the "moon" - a bit darker on the frequencies.  I really like it, especially when you can get it for about $200 - $220.  Plus, it has USB, Opitical and Digital coax inputs.  It can be used only as a DAC, only as a AMP / Pre-Amp, or on combination mode: Amp / DAC.  The flavor between the Earth opamp module, and the Wolfson DAC tends to be leading more towards your placement in the front row of a concert.  The mids are strong.  At the moment, I've been using just the amp portion along with my HeadAmp Upsampling DAC.  This DAC tends to be balanced in sound, but with the exception of a bit of extra detail on the top.  When paired with my Little Dot I+ and tubes that I need to check the flavor of, the whole presence isn't as warm as I'd like.  But with HeadAmp DAC with the Audio-GD fun is about as perfect as it gets with my Grado RS1i.

 

Also, on the forum, there is a member, who has an Audio-GD listed for $275.00.  His is a variant that he purchased from Pacific Valve and they applied some enhancements to those models.  I can't fully explain the enhancements as PV no longer has those details on their Web site.  I know of the member, but don't really have any direct affiliation to the individual and that sale.

post #3509 of 6943

Rolled in a pair of Reflector 6N23P, 1969, this evening, and first impressions, these are really nice tubes. The mid range has a nice bit of warmth and sweetness which I am finding to be very enjoyable. However, this is after only 15 minutes or so, so can't really say anything about how they compare to the better-known Mullard, Amperex and Siemens ECC88.

 

I have read in the Lyr forums that the late 1960's Reflectors are superior to those of the late 1970s and early 80s. So if you decide to pick up a pair of Reflectors, I can say that these 1969 Reflectors appear to be very nice tubes.

post #3510 of 6943
Quote:
Originally Posted by wje View Post
 

 

My take on the offering.  Price is $235.00.  Plus, add in about $45.00 / shipping as well as PayPal fees, and you'll have a "close" accurate estimate to the cost.  I see options for the DAC end and the ESS Sabre is listed.  Normally, on their gear, the ESS Sabre is usually more costly and I suspect the Wolfson, would come standard - or, that's my impression.

 

Now.  About Audio-GD.  I currently have the "FUN" model, which is similar inside to the Compass / Compass 2 model with respect to power, power supply, etc.   My built in DAC features 2 - Wolfson chips and I'm using the "Earth" op module, which is about their most neutral offering, when compared to the "sun" - a bit more detailed on the upper end, and the "moon" - a bit darker on the frequencies.  I really like it, especially when you can get it for about $200 - $220.  Plus, it has USB, Opitical and Digital coax inputs.  It can be used only as a DAC, only as a AMP / Pre-Amp, or on combination mode: Amp / DAC.  The flavor between the Earth opamp module, and the Wolfson DAC tends to be leading more towards your placement in the front row of a concert.  The mids are strong.  At the moment, I've been using just the amp portion along with my HeadAmp Upsampling DAC.  This DAC tends to be balanced in sound, but with the exception of a bit of extra detail on the top.  When paired with my Little Dot I+ and tubes that I need to check the flavor of, the whole presence isn't as warm as I'd like.  But with HeadAmp DAC with the Audio-GD fun is about as perfect as it gets with my Grado RS1i.

 

Also, on the forum, there is a member, who has an Audio-GD listed for $275.00.  His is a variant that he purchased from Pacific Valve and they applied some enhancements to those models.  I can't fully explain the enhancements as PV no longer has those details on their Web site.  I know of the member, but don't really have any direct affiliation to the individual and that sale.


The 15.32 seems to be only the WM8741 where the 11.32 has the Sabre ES9018 for $299

 

The Compass 2 is a nice looking unit but the prices start to ramp up quickly and that "FUN" in the F/S section has dropped to $260 or BO, now there is a deal for sure.

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