Jump to content

Show us your Pre Amps....


Recommended Posts

I'll start with a couple of DIY pre amps......

 

The top one is a DIYAudio B1 NuTube, designed by Nelson Pass.

The one one the bottom is an Elekit TU-8500 valve pre.

 

IMG_0084.thumb.JPG.381d1a7c79a7e6e5c4e165efbc4b2808.JPG

  • Like 9
Link to post
Share on other sites
  • Replies 114
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Audio Synergy........

Supratek Cabernet Dual.  

A little beauty. Brutally Brimarized! 😁   Nagra PL-L 1x Brimar 6060 1955 “Trustworthy” 2x Brimar 12AX7 1952 Long Black Plate   Pretty much done tube rolling for now...

Elektra Pnyx.

Very happy with it and it was a big leap forward in SQ from my previous pre. But it was bought at a time when i was still using multiple sources frequently - vinyl, tuner, CD, Dac - and I’m not sure it’s the best thing for a system with a single digital source.

B7B1F3D2-3F59-4F76-87A1-2E257C0555D7.thumb.jpeg.53010d3203a67719370d4f0776597456.jpeg

 

Edited by buddyev
  • Like 7
Link to post
Share on other sites


Guest Misterioso

Good topic.

 

Ever since I tried a relatively modest 2nd hand preamp between a dac and active speakers, I have been convinced of their sonic benefits. I moved up from a BAT VK-10 to a MF M8 Pre and finally a Mola Mola Makua. Important criteria were a low output impedance via XLR and built-in top quality dac and phono stage modules to keep the system simple. My most expensive hifi product ever, but I am very happy with it. The Makua connects to Quested V2108 active monitors.

 

Makua_20191012_0003.thumb.jpg.8dfcf186e64f8bb3521088ea034ed08d.jpg

 

 

 

Link to post
Share on other sites
2 hours ago, Batty said:

Who would have thought Pre amps would be so popular.

 


They are essential in bringing dynamics and dimension to your music. 

 

These are my two favourite preamps after trying out quite a few over the years ...Supratek Cortese valve and Bakoon Satri solid state circuit.

24E5959C-4D1E-42E4-BA37-3D8F0E354F84.jpeg

376A3B1B-24C2-4ADD-92A4-8165E6355E10.jpeg

  • Like 7
Link to post
Share on other sites


I'll make mine an oldie.  This one is doing duty as a mono preamp in my 45/78 system in my record room.  That's an old Playmaster-type 6L6 UL PP power amp behind it.  They both get a bit dusty, but they keep working.

 

DSC_0377.jpg.c2ce26c400c267b119903ff8d84c089d.jpg

  • Like 3
Link to post
Share on other sites

The slightly over engineered dual mono Krell Evolution Two pre amp. It just about needs its own dedicated rack.

ev2.jpg.709ce64c138017bdb8405dfe0b17b8be.jpg

  • Like 9
Link to post
Share on other sites
2 minutes ago, DRC said:

The slightly over engineered dual mono Krell Evolution Two pre amp. It just about needs its own dedicated rack.

ev2.jpg.709ce64c138017bdb8405dfe0b17b8be.jpg

Does that mean 2 remotes for volume control?

  • Haha 1
Link to post
Share on other sites


8 minutes ago, PKay said:

Does that mean 2 remotes for volume control?

only one remote... there is a cat link between the two unit to synch remote function and other adjustments

  • Like 1
Link to post
Share on other sites


conrad-johnson GAT preamplifier.   my reference for 8 years - others have come and gone - GAT has stayed the course - GATS2 upgrade awaits at some stage.

One of the few preamps with full tape loop - enables easy insertion of eq into playback or pure direct sound - best of both worlds. drives ss or tube amps to their best

 

cZV9XyT.jpg

 

 

Edited by metal beat
  • Like 8
  • Love 1
Link to post
Share on other sites

My Croft "Vitale" (original edition, 1980's?), the left side is cropped in the photo.  Hand-built in the UK.

 

I like the 1950's styling.  The logo under the knobs lights up in red when the power's on.  The knobs are tarnished, I will eventually strip and re-polish at some stage.  It's a nice-sounding (to my ears) 3-valve design with MC phono. 

 

Front.JPG.dd1a1940bacb8bd23abe27e0cf4f4e79.JPG

 

 

Edited by audiofeline
  • Like 6
Link to post
Share on other sites
21 minutes ago, audiofeline said:

My Croft "Vitale" (original edition), the left side is cropped in the photo.  Hand-built in the UK.

 

I like the 1950's styling.  The logo under the knobs lights up in red when the power's on.  The knobs are tarnished, I will eventually strip and re-polish at some stage.  It's a nice 3-valve design with MC phono. 

 

 

 

 

 

I agree, lovely minimalist styling from the golden age :)      How do they do MC with only 3 valves? Step-up transformer?

 

  • Like 1
Link to post
Share on other sites
10 hours ago, aussievintage said:

I agree, lovely minimalist styling from the golden age :)      How do they (Croft) do MC with only 3 valves? Step-up transformer?

I'm not sure, as I only have very basic technical knowledge.  Inside pic below.  This is the info I have on the valves:

- The line uses a Mullard 12AT7WA   [aka ECC81], Glen Croft told me that the  12AX7A / ECC83 would have higher gain (the volume is OK with this valve).

- The two Phono valves are 6201, however Glen Croft said it should be a ECC83, the 6201 would have lower gain.

 

I haven't tried any tube rolling yet.  I'm open to some suggestions for me to try in the future.  I've done some other improvements, eg upgraded the RCA sockets, and have a high-grade selector switch to install (the current one looks like the basic Jacar switch).  I've read that Glen has serviced this model to come up to his current model's specs, but I don't want to send the amp to the UK for him to do it and he wouldn't tell me what's required to do it myself. 

 

I'd also be interested in comments from valve-amp buffs on what they see in here.

 

986378642_Overallinside.JPG.ccfee24b03d61b143ed238196620dd0f.JPG

 

 

Edited by audiofeline
  • Like 1
Link to post
Share on other sites

I found this on Vinyl engine

 

Quote

Hi, I own the basic model of the Croft Vitale and it was my first valve/tube pre/phono amp.  It's place as my main valve/tube pre-amp was recently replaced, although I must add that I have retained it as my tube phono stage.   Since it was my first and only tube phono amp I'm afraid I don't have anything else to compare it with :P although I must add that IMHO the standard of the passive parts inside are rather run of the mill and should be replaced with better ones for improved performance. One more thing, the phono stage can only handle MM or high-output MC cartridges and you will need a head-amp or a step-up transformer if your cartridge output is below 0.5mV.

 

Not sure what model you or he had, but maybe it's really MM ?

Edited by aussievintage
Link to post
Share on other sites
1 hour ago, audiofeline said:

I'd also be interested in comments from valve-amp buffs on what they see in here.

 

Another thought, you have the rings on the line amp valve it appears.   As the phono preamp undergoes more amplification, it might be better to put them on those as well?

 

The setup seems to be similar to what I use by the way.  I just have an buffer/gain stage.

Link to post
Share on other sites
1 minute ago, aussievintage said:

... you have the rings on the line amp valve it appears.   As the phono preamp undergoes more amplification, it might be better to put them on those as well?...

The valve rings were put on by the previous owner.  I asked someone about them, and got negative comments about their effectivenes.  If you think it will help I'll put some on the phono valves. 

 

I did put some sound-deadening material (similar to dynamat) on the aluminum valve bracket - it made an amazing improvement to the bass, clarity and soundstage. 

5 minutes ago, aussievintage said:

Not sure what model you or he had, but maybe it's really MM ?

My Croft has MC phono; I've have used a Sumiko MC cart through it. 

I believe the preamp could come configured for either MM or MC. 

 

 

I've also replaced the two volume pots with a single IR-controlled Alps. That made Mrs.Feline happy!

  • Like 1
Link to post
Share on other sites
1 minute ago, audiofeline said:

The valve rings were put on by the previous owner.  I asked someone about them, and got negative comments about their effectivenes.  If you think it will help I'll put some on the phono valves. 

 

Ah well, that's another question.   Put it this way, if they have any effect, it's more likely to be apparent when used on the valves at the start of the amplification chain, and any vibration induced noise would get amplified as well.  I just put some on mine, but, not sure I hear a big difference anyway.

 

 

  • Like 1
Link to post
Share on other sites

At just over $40 delivered, this is probably the cheapest thing I've bought for my system... :lol:

 

IMG_20191019_160817-01.jpg.2d4628a4e79b16ffde1b9471b9252354.jpg

 

Well, until I bought some different tubes and an iFi iPower supply for it. 🤦‍♂️  Actually, technically, it probably still is the cheapest single component in my system ha.

  • Like 1
Link to post
Share on other sites
51 minutes ago, Monk said:

At just over $40 delivered, this is probably the cheapest thing I've bought for my system... :lol:

 

IMG_20191019_160817-01.jpg.2d4628a4e79b16ffde1b9471b9252354.jpg

 

Well, until I bought some different tubes and an iFi iPower supply for it. 🤦‍♂️  Actually, technically, it probably still is the cheapest single component in my system ha.

 

And it is what?

 

Andy

 

Link to post
Share on other sites
11 minutes ago, seaninbrisbane said:

IMG_4227.thumb.JPG.cf0760e70573d83ad28a12ef361f3abf.JPG

 

Nagra PL-P

 

Intriguing - in a 'brutalist' kinda way.  :lol:

 

But soooo many knobs and switches!  :(

 

Andy

 

  • Like 1
Link to post
Share on other sites
18 minutes ago, andyr said:

 

Intriguing - in a 'brutalist' kinda way.  :lol:

 

But soooo many knobs and switches!  :(

 

Andy

 

And one of these days I'm going to learn how to use the knobs (on the 4.2).

  • Like 1
Link to post
Share on other sites
  • Recently Browsing   0 members

    No registered users viewing this page.




×
×
  • Create New...