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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 05:27 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
I'm changing the name of the new amp from Abstinence to David because David slew Goliath today. I took Abstinence out to Dave's to see how it would go driving his 400lb each 6' dual 12" Focal woofers lead lined Osborn speakers. It drove them with ease and drove them loud. We were playing just as loud as Dave does with his $13K quad 300B monoblocks and the amp never sounded like it was straining or clipping, even softly clipping. And there was a ton of bass. At one point in an operatic piece, Tosca, the floor actually rumbled. All with only a few watts.

Thankfully the massive Osborns are 94db efficient but this was an incredibly impressive afternoon of music. Dave said of the six or so amp I have taken to his place, including a tube\chip amp this is the best amp ever. He was incredibly impressed. Dave's system cost $40K and we put his new Pro-Ject RPM 10.1 TT (I want one) to work with its Sure V15 MKIII and new stylus. What a day. Abstinence is a keeper.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 05:59 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
He is a poor quality image of Abstinence (front and center) driving the massive Osborns and associated gear - try La Fontaine CD player tube preamp (driving Abstinence) and Audio Aero 60W quad 300B monoblocks.
Attachment:
AbstinenceOsborn.jpg


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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 06:00 
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Joined: 08 Aug 2009, 03:11
Posts: 2225
Location: Chilliwack, BC
I love it when that happens. Congrats! :beerchug:

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* Ratings are for transistors - tubes have guidelines*
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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 06:30 
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Geek wrote:
I love it when that happens. Congrats! :beerchug:

Geek, always love your comments and your posts. In the past these juggernauts have eaten one of my low power amps (6AS7 SET - KiSharn, now in a foster home). I was really worried because I think the the big speakers are capacitive (current leads voltage). Not something low power amps really enjoy. But, surprise, surprise (piled on) it was like a marriage made in heaven. We just kept saying it the whole afternoon how incredibly good it sounded. And it could have gone so, so bad.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 08:45 
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Joined: 08 Aug 2009, 03:11
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Location: Chilliwack, BC
Thanks, mate! :D

I so wish the 6EM7 and it's higher-mu-gain-tube cousin, the 6FD7 had modern equivalents.

Them darned things have pwnd at more audiofests than I can remember (literally - I have to browse my albums where "Baby Amp" [6FD7] kicked a 300B's arse in peer review).

But more plentiful - 6CW5/PL86: little EL34's sonically in PP (in SE, they suck).... dirt friggin' cheap, but DO NOT exceed 260V Vsg or Va.

Cheers!

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* Ratings are for transistors - tubes have guidelines*
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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 16:56 
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Geek: just put in a bid on eBay for 10 X Samsung 6EM7s but don't tell anyone. I said Abstinence would be my last.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 20:02 
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Joined: 06 Apr 2009, 10:08
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Location: US Pacific Northwest
mwhouston wrote:
... don't tell anyone. I said Abstinence would be my last.
Never apologize for doing a good thing. ;)

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 Post subject: Re: 6EM7 power amp
PostPosted: 14 Nov 2013, 20:24 
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Location: Chilliwack, BC
Suncalc wrote:
mwhouston wrote:
... don't tell anyone. I said Abstinence would be my last.
Never apologize for doing a good thing. ;)


Yeah, that's a Canadian thing to do :P

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-= Gregg =-
* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design


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 Post subject: Re: 6EM7 power amp
PostPosted: 15 Nov 2013, 02:02 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Geek wrote:
Suncalc wrote:
mwhouston wrote:
... don't tell anyone. I said Abstinence would be my last.
Never apologize for doing a good thing. ;)


Yeah, that's a Canadian thing to do :P

Geek did you tell Matt? It was meant to be a secret. Last time I tell you anything (lel). Lets see if I win more tubes first. I've actually got three big projects on the go right now but willing to take on another - Matt's 6V6. I was going to do a "crazy" build but have uncovered a few flaws in the craziness so now the build may be more standard - with a Houston twist of course.

Does anyone know anyone who is an episcopalian? Just interested in talking to them.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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 Post subject: Re: 6EM7 power amp
PostPosted: 15 Nov 2013, 04:19 
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Joined: 08 Aug 2009, 03:11
Posts: 2225
Location: Chilliwack, BC
Hrm, nope! 90% Dutch Reformed in my neck of farmtown.

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design


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