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Post by Deleted on Jul 25, 2018 17:10:20 GMT
What pre have you got Macca ? and would it be possible to include an NVA pre in the bake off Biggy ? if I were closer I would take my Rothwell indus. We can include anything we want can't we? On a side note, I wouldn't be bothered comparing the DCB1 & Khozmo SA to a "sub £2 pot" It may be beneficial for Macca to do so as he uses an NVA unit.
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Post by Deleted on Jul 25, 2018 17:15:30 GMT
I see no reason why not....!!!!
I can hear yer wheels turning.😁
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Bigman80
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Post by Bigman80 on Jul 25, 2018 17:18:19 GMT
Of course you can, and you can also talk about it and you’d be welcome to report it here if you wish. It’s not the first time anyway. I recall a previous bake off when Jason (Figlet) had an LDR and Martin had his P90SA. Others were present too, I seem to recall there wasn’t a lot in it that time but the LDR did well.
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Bigman80
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Post by Bigman80 on Jul 25, 2018 17:22:34 GMT
Jammys Rothwell would do well IMO. It has quality stepped attenuators and short signal path. Not a lot else to get right, surely.
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Post by Deleted on Jul 25, 2018 17:55:18 GMT
Jammys Rothwell would do well IMO. It has quality stepped attenuators and short signal path. Not a lot else to get right, surely. I suspect so, Rothwell speaks a lot of sense. I think Jammy should get involved seeing as he suggested it!
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Post by macca on Jul 25, 2018 18:11:08 GMT
Of course you can, and you can also talk about it and you’d be welcome to report it here if you wish. It’s not the first time anyway. I recall a previous bake off when Jason (Figlet) had an LDR and Martin had his P90SA. Others were present too, I seem to recall there wasn’t a lot in it that time but the LDR did well. That was a serious bake-off with proper level-matching and that. I've done a few pre-amp bake-offs with the P90SA, up against the top dollar stuff. There have only been a few pre-amps that I thought I might prefer to it - A Mark Levinson and an autoformer passive that Oli used to own, but I'd have to have a good listen in my own system before really deciding. The MLs are rare and expensive and the autoformer was a one off build, so not an easy task.
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Post by macca on Jul 25, 2018 18:17:40 GMT
We can make that happen, Macca. Preamp bakeoff!!!!!! If it's for the Krell, it's either balanced or bust. I've given chapter and verse on the preamp requirements ideally for *this particular* Krell, which I understand as a balanced circuit right from the input, rather than a single ended with an 'adaptor circuit' on the input as many are.... I really don't see what benefit there is to be gained from using it balanced? The leads from the pre-amp are only 50 centimetres long, as are the leads from CD player to pre. There's no need for balanced operation. Used it single ended at the bake-off too, and there was nowt wrong with the sound quality there. I have some balanced interconnects so if I do get a pre with balanced outputs I'll give it a try, but I'm not expecting there to be any difference at all.
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Post by dsjr on Jul 25, 2018 18:30:45 GMT
It's the design of your particular amp, rather than single ended vs balanced. Your amp was DESIGNED for balanced use PRIMARILY and the phono sockets were added as a backwards compatible thing.
Ordinarily, i'd agree that 'balanced' in domestic use with interconnects of barely a few metres each wouldn't matter, but this particular amp may well be different. Shoving a wire link in each XLR socket to tie one leg to ground isn't really fully exploiting the amps in my book, although I admit I may have it wrong. I'm looking to the manual and Stereophile reviews here. the active ATC's may have had balanced inputs, but I'm not convinced the amp circuits were balanced all the way though as your Krell is.
If I'm wrong, I apologise, but I always have this niggle that I'd never be able to hear the amp as it was designed to be used.
I did send a message about the speaker cable you seemed to be using when one of your home pics was taken and you never replied. I suppose the reasons I gave were crap as well. Just passing on experiences, sorry...
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Post by Deleted on Jul 25, 2018 18:31:27 GMT
Of course you can, and you can also talk about it and you’d be welcome to report it here if you wish. It’s not the first time anyway. I recall a previous bake off when Jason (Figlet) had an LDR and Martin had his P90SA. Others were present too, I seem to recall there wasn’t a lot in it that time but the LDR did well. That was a serious bake-off with proper level-matching and that. I've done a few pre-amp bake-offs with the P90SA, up against the top dollar stuff. There have only been a few pre-amps that I thought I might prefer to it - A Mark Levinson and an autoformer passive that Oli used to own, but I'd have to have a good listen in my own system before really deciding. The MLs are rare and expensive and the autoformer was a one off build, so not an easy task. There are a couple of ML28 on "HiFiShark" admittedly they are in Germany. Can make a few quid importing them and moving them on in the UK if you don't like them. look quite rare over here. The Autoformer was quality, a bit soft in the bass but very good at everything else. Maybe a touch on the warm side too but not much. I really liked it. The DCB1 is very different, it's so detailed and revealing. I am impressed by it. I am making a Hotrod version to see what happens.
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Post by macca on Jul 25, 2018 18:35:15 GMT
The DCB1 is a kit I guess. How much do they cost? Or do you just get the circuit diagram and go from there?
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Post by Deleted on Jul 25, 2018 18:44:02 GMT
Jammys Rothwell would do well IMO. It has quality stepped attenuators and short signal path. Not a lot else to get right, surely. I suspect so, Rothwell speaks a lot of sense. I think Jammy should get involved seeing as he suggested it! Would love to attend, but the distance dictates, its just to far as i live in the Scottish Highlands. But should you wish to hear / include my Rothwell Passive Pre at any future bake off I would be only too willing to send it to you if you can send it back asap after bake off. Or have the bake off at my gaff....Haggis Neeps n Tatties and a good Dram awaits all.
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Post by Deleted on Jul 25, 2018 18:53:15 GMT
I suspect so, Rothwell speaks a lot of sense. I think Jammy should get involved seeing as he suggested it! Would love to attend, but the distance dictates, its just to far as i live in the Scottish Highlands. But should you wish to hear / include my Rothwell Passive Pre at any future bake off I would be only too willing to send it to you if you can send it back asap after bake off. Or have the bake off at my gaff....Haggis Neeps n Tatties and a good Dram awaits all. The Highlands! Be'jesus, that's a journey and half lol
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Post by Deleted on Jul 25, 2018 20:21:37 GMT
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Post by Deleted on Jul 25, 2018 20:38:46 GMT
The DCB1 is a kit I guess. How much do they cost? Or do you just get the circuit diagram and go from there? Steve on AoS has just paid £19 for bare boards, I have built mine for £400 all in.
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Post by Deleted on Jul 29, 2018 23:46:28 GMT
All this business about audio designers being 'legends' and 'geniuses' baffles me. If he'd designed a spaceship that could take men to Mars fair play but knock up a few audio amplifiers and he's some sort of hero? “Colin [Wonfor] is a chemist and a power supply expert. He consulted at NASA on the international space station, notably on the solar array and power conversion.” But it’s not going to Mars, so fairynuff...
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Post by Deleted on Jul 30, 2018 1:59:55 GMT
All this business about audio designers being 'legends' and 'geniuses' baffles me. If he'd designed a spaceship that could take men to Mars fair play but knock up a few audio amplifiers and he's some sort of hero? “Colin [Wonfor] is a chemist and a power supply expert. He consulted at NASA on the international space station, notably on the solar array and power conversion.” But it’s not going to Mars, so fairynuff... What!! Really?? Wow. That's how you know someone is top notch. Fair lay to the man.
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Post by Deleted on Jul 30, 2018 2:23:37 GMT
Yup that is something else........👍
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Post by Deleted on Jul 30, 2018 7:37:52 GMT
Yeah, but he was utterly unsuccessful in persuading them to devote 20kg of payload to one of his Class A amps for the astronauts to listen to, so basically the whole thing was a total fail.
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Post by Deleted on Jul 30, 2018 14:57:24 GMT
Yeah, but he was utterly unsuccessful in persuading them to devote 20kg of payload to one of his Class A amps for the astronauts to listen to, so basically the whole thing was a total fail. 😂😂
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Post by Deleted on Jul 31, 2018 21:03:29 GMT
I have listened to a few of Nelson's design and I loved the way he use Silicon Carbide device, they are great at high temperatures, but hellish expensive. I found them a great sound very close to my old TOCA designs in sound but using a totally different topology so go Nelson go. And much better in to low impedance loads because they were Push-Pull and not Single Ended designs with a limited current supply in the negative cycle. And thus much more efficient not like mine which were about 25%. SECA designs are better with horns and more sensitive speaker like Tannoy Buckingham. And not like my test speaker Ruark Sabre at 82dB/W
Oh Ben the pay loads was not the problem it was me I was to heavy to go at then 140Kgs, lighter now phew but to old, Sh#t pooo crap.
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Post by Deleted on Jul 31, 2018 22:40:42 GMT
I seriously want one of Colin's big Class A amps (the ones with the huge heat sinks), but being a (currently) poverty stricken pensioner sort of rules that out at the moment. I'd settle for a Pass Labs Aleph 3 though .
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Post by Deleted on Aug 1, 2018 3:06:24 GMT
I seriously want one of Colin's big Class A amps (the ones with the huge heat sinks), but being a (currently) poverty stricken pensioner sort of rules that out at the moment. I'd settle for a Pass Labs Aleph 3 though . ME TOO YES PLEASE SANTA
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Post by alit on Aug 1, 2018 7:26:07 GMT
Had an F5 built by Nick Gorham which was a superb amp. Still being enjoyed by its new owner, who is using it in place of the valve amps he’d previously built.
Having seen the efforts Nick has put into his designs of amps both valve and SS, and his reference phono stage, which took him pretty much a decade to perfect, I’d have to agree with dsjr’s comments earlier in the thread.
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Post by Deleted on Aug 2, 2018 21:53:21 GMT
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Bigman80
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Post by Bigman80 on Aug 2, 2018 22:42:15 GMT
I was looking at those but the time isn’t right for me.
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Post by Deleted on Aug 2, 2018 23:10:42 GMT
A bit expensive IMO plus they need a fair bit of case work.
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