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Little Dot MKIII Tube Rolling - Page 55

post #811 of 2870
Thread Starter 
Quote:
Originally Posted by JimSmiley View Post
I'd like to give a shout out to RogerB who sent me a pair of Russian 6ZHIP-EV driver tubes absolutely free of charge. He even went so far as to send them priority shipping, so I could have them last weekend.

I've been listening to them all this week, (around 30 hours thus far) and I think they are wonderful. To my ears, they have a much wider soundstage than the stock drivers. It seems the Russians get along much better with each other. These have the groove in them and they are mucho groovy!!! I've been listening to all kinds of music..rock, jazz, bluegrass, and they seem to easily handle each genre well. My stock tubes were great for rock and bluegrass, but I think the 6ZHIP-EV really shines with small combo jazz.

I've been very pleased with the my stock drivers, but these new tubes really take it to another level.
Thank you JS for the kind words! I'm thrilled that you like the tubes! I know what you mean by they shine with small combo jazz. I absolutely love those tubes with Dave Brubecks' "Time Out" and Norah Jones "Come Away With Me".


They just get better with more "burn In". Enjoy!!

Roger
post #812 of 2870
Thread Starter 
Quote:
Originally Posted by Penchum View Post
JS, I agree 100%. Those little 6Z's are the biggest bang for the buck I have found so far. They really excel with multiple types of rock, and I found them to work well with all other types of music too. RogerB is a very nice person, with a good ear for tubes!! Hat's off to RogerB!!
Thank you Pench for the sentiments! Actually, it was you who discovered these excellent Russian tubes and reported back to the group earlier in this thread. I just followed your lead.

It was also you who suggested that since these tubes were purchased in a group of eight that maybe we could "share" with other Little Dot Tube Owners. I thought that was an excellent idea and just wanted to help a Little Dot Tube Rolling newbie out! JS is a heck of a nice guy and I was glad to help.

Again, thanks for the kind words.

Roger
post #813 of 2870
Thread Starter 
Quote:
Originally Posted by ethebull View Post
Hey -

RogerB started this thread, as well as the “joining the Little Dot Family” thread.

Thanks RogerB!!! We all owe’ ya
Aw thanks E !!! I've probably learned more from this thread than anybody else thanks to you and several others! I know how confusing this "tube rolling" can be right after you receive your Little Dot Tube Amp and I was glad to help a member of the "family" out .

Thanks again E!

Roger
post #814 of 2870
So I got my Mullard ef92s on today. The soundstage is splendid....10folds better. However I have a dumb question (two really). For starters, how long does it really take for tubes to burn-in? I am finding people that say 10 hours, and some that say 100 hours. There isn't as much bass as the stock 5654s, is that just something that goes along with the 92s generally? They weren't NOS, but rather from military equipment. I'm thinking they just might not be burned in yet.
post #815 of 2870
Quote:
Originally Posted by eightbitpotion View Post
So I got my Mullard ef92s on today. The soundstage is splendid....10folds better.
Ooooweeee! I can't wait to get mine! I just bought these:
PAIR MULLARD CV4015 EF92 6CQ6 UNUSED BOXED
Quote:
Originally Posted by eightbitpotion View Post
There isn't as much bass as the stock 5654s, is that just something that goes along with the 92s generally? They weren't NOS, but rather from military equipment. I'm thinking they just might not be burned in yet.
I thought I'd read that they have a bit more bass and lows extension - so maybe yours aren't yet burned in? Let us know for sure, I won't get mine for about 10 days yet...
post #816 of 2870
I have to lower the gain on my MKII when I use EF92 or EF91 tubes. Has anyone else experienced this. In EF92 mode on 10+ gain I can't turn the volume up past 35 and thats with my hard to drive 501s. In EF95 mode I usually listen at 50 but can bear 60-70 at short intervals all of course depending on the inherent volume of the recording.

Does the EF92 mode have more output power or something?
post #817 of 2870
Quote:
Originally Posted by eightbitpotion View Post
So I got my Mullard ef92s on today. The soundstage is splendid....10folds better. However I have a dumb question (two really). For starters, how long does it really take for tubes to burn-in? I am finding people that say 10 hours, and some that say 100 hours. There isn't as much bass as the stock 5654s, is that just something that goes along with the 92s generally? They weren't NOS, but rather from military equipment. I'm thinking they just might not be burned in yet.
Quote:
Originally Posted by oatmeal769 View Post
Ooooweeee! I can't wait to get mine! I just bought these:
PAIR MULLARD CV4015 EF92 6CQ6 UNUSED BOXED
I thought I'd read that they have a bit more bass and lows extension - so maybe yours aren't yet burned in? Let us know for sure, I won't get mine for about 10 days yet...
Quote:
Originally Posted by ciphercomplete View Post
I have to lower the gain on my MKII when I use EF92 or EF91 tubes. Has anyone else experienced this. In EF92 mode on 10+ gain I can't turn the volume up past 35 and thats with my hard to drive 501s. In EF95 mode I usually listen at 50 but can bear 60-70 at short intervals all of course depending on the inherent volume of the recording.

Does the EF92 mode have more output power or something?
Ok, here is what I know. EF92's, like the 6CQ6's, usually take 40-50 hours to mature. Many things will change for the better, as the maturing is happening. You usually end up with a lower bass extension, those nice mids, and plenty of high end detail, all wrapped up in an excellent sound stage. The "Mullard" flavor is a favorite with many tube freaks. I have also experienced the need for less gain on the MKII with them, and I'm using the HD-650s. I would recommend setting the gain to 5 (for the MKII) for both EF92 and EF95 families (if you are still tube rolling) to keep things easy.

My introduction to tube headphone amps, years ago, was with EF92 driver tubes and I learned that they grow on you. If at first, they seem too odd, give them some time. Try all kinds of music in your collection. Some, will really blow you away! Others, you may prefer to drive with the EF95 family and that is OK too.
post #818 of 2870
Thanks Penchum.

Another quick question if you don't mind.

Can I use the Electro-Harmonix 6H30Pi Gold or the Sovtek 6H30PI in my MKII? I read somewhere that you "should" be able you use them but I haven't seen any verification.

If I can use them are there any issues to look out for most notably heat?
post #819 of 2870
Nevermind I just read here on the Little Tube website that the 6h30 tubes are compatible but they will evidently run too hot.
post #820 of 2870
Quote:
Originally Posted by ciphercomplete View Post
Nevermind I just read here on the Little Tube website that the 6h30 tubes are compatible but they will evidently run too hot.
It's true. You can do a resistor mod, so you can use the 6H30PI's, but it is a one way street. Do the mod, never go back to 6H6NPI's again. It also kills your warranty, so it might be something to try later on.
post #821 of 2870
First post in the thread I think, came to say how amazed I was earlier.

Received my LD about a week ago and have been listening to the stock tubes. I also bought some D880's to go with it and was very happy with the sound when I got it and pretty impressed.

However if I had to pick fault the bass was overpowering and bloated, not tight at all. Never really improved much as the phones or amp got a lot of hours through them. To get a balanced sound I had to set the eq like this:



The vocals were also very recessed and again not particularly clear.

I received some Mullard M8161 EF92’s in the post today and didn’t expect too much at all, especially as they were not burnt in and were inexpensive. I couldn’t be more wrong. After turning it on I was amazed at the clarity added across all the frequencies. Tight accurate bass but not overpowering (I now have a flat eq) and the vocals were spot on, not overwhelmed at all.

Its impossible to put into numbers but if I had to I would say the base had improved about 7 or 8 times it was that impressive, I was amazed. Vocals were 2 or 3 times as good as were the low mids. The highs had more extension and a slight touch more clarity but not day and night like the rest of the spectrum. This has helped the stage no end and I think I will struggle to find a much better tube than these.

I also got some cheap Z77/EF91 sent through and these are also great little tubes. Immediately it was obvious they were not nearly as clear as the Mullards but what they lost in that they made up in body and character, a really, really good tube for jazz.

Obviously this semi review has no real relevance as not all the tubes are fully burnt in and neither are the phones to be honest, but its more to say how surprised I was and that everyone must try new tubes if they haven’t already.

I’m sorry to say to the failed bidders but I won ethebull’s auction and looking forward to receiving the tubes and trying some other EF95’s I was hoping I would like one or two sets and sell the rest on again. But having listened to a couple of pairs it seems I might just find different qualities in each tube rather than ones I like and dislike L either way I’m sure there will be some tubes up for sale from me soon.
post #822 of 2870
accidental post
post #823 of 2870
Quote:
Originally Posted by ricco87 View Post
I received some Mullard M8161 EF92’s in the post today and didn’t expect too much at all, especially as they were not burnt in and were inexpensive. I couldn’t be more wrong. After turning it on I was amazed at the clarity added across all the frequencies. Tight accurate bass but not overpowering (I now have a flat eq) and the vocals were spot on, not overwhelmed at all.

Its impossible to put into numbers but if I had to I would say the base had improved about 7 or 8 times it was that impressive, I was amazed. Vocals were 2 or 3 times as good as were the low mids. The highs had more extension and a slight touch more clarity but not day and night like the rest of the spectrum. This has helped the stage no end and I think I will struggle to find a much better tube than these.
Nice, I have the Mullard M8161's sitting in my closet as I'm waiting for my stock tubes to burn in. I have high expectations for the 8161's now.
post #824 of 2870
ricco: What kind of headphones are you using? We've had mixed results with the EF91s not working in some cases.
post #825 of 2870
I got my 6028/408As today and I can confirm they don't work. Anyone with a MKIV want some 6028s?
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