|
|
Post by macca on Sept 27, 2018 17:01:51 GMT
I have an NVA A30 power amp for sale, one owner from new, about 3 years old, perfect working order, perfect condition, £175 delivered mainland UK (new cost £350).
Also Linn LK100 power amp, working order but slight trace of hum if you put your ear right up to the speaker so could use a service/recap, perfect cosmetic condition £150 delivered mainland UK (not made anymore but I'd guess would be about £2000 new if they were).
|
|
|
|
Post by dsjr on Sept 29, 2018 18:40:50 GMT
There's goodly things you can do to an LK100 it seems and apparently it opens up no end once you do..... All to do with the hf roll-off Linn put in for some reason.
Seriously folks and whatever, the LK100 is superbly made inside it seems and at the time they were generally trouble free. The faint hum could just be a hum loop if the preamp is 'earthed' as well. Not suited to passive preamps either I gather as the input impedance is only 10k and one consequence of this is faint hum on the speaker outputs... So it may be in actual perfect working order and it should drive 4 ohm loads easily too as passive (and even two amp active) Keilidh's were often used with this loading...
|
|
|
|
Post by macca on Sept 29, 2018 18:43:04 GMT
I've used it with a passive and it's fine. And it will drive the Celestion A2 which are a tough load.
|
|
|
|
Post by dsjr on Sept 29, 2018 19:23:11 GMT
That slight hum, is it there with no input connected or better, with inputs shorted?
I'm honestly thinking it 'could' be the passive you probably connected to it (my old D-60's and a friends single one) both hummed with a 10k log passive connected irrespective of the setting of their own gain controls, but used with an active pre (my own IC-150's and his croft Micro 25), they're perfectly behaved.
Just sayin' and it'd be a shame if you undersold this amp due to a possible mismatch, that's all.
|
|
|
|
Post by macca on Sept 29, 2018 19:52:33 GMT
The hum is there with nothing connected except the speakers. It is very slight but I'm fussy. None of my other amps (and I've a few!) hum at all, all dead silent. Even the SECA valve job.
I think the price is fair given that. I bought this many years ago now, just trying to clear some space, not that bothered about the money but I'm not going to give it away for nothing! It's a lot of amplifier and close to military grade construction. Really weighty ingot of a thing.
|
|
Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,071
|
Post by Bigman80 on Sept 29, 2018 20:49:10 GMT
There’s absolutely nothing wrong with either price. A30 is a cracking wee amp. It was what git me back into NVA after a few years. It was good enough to make me buy 4 A40s.
|
|
|
|
Post by macca on Sept 29, 2018 21:11:40 GMT
For me it sounds very like a good EL84 push-pull valve amp. Only without the expense and the aggravation.
That's just not the sound I'm after but a lot of people like that presentation.
|
|
Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,071
|
Post by Bigman80 on Sept 29, 2018 21:19:45 GMT
I still haven’t heard an EL84 amp. I still like NVA sound but I really craved more wallop in the end.
|
|
|
|
Post by dsjr on Sept 30, 2018 8:34:20 GMT
The best EL84 amp I've ever heard is the EAR V12. Banks of the sodding things, but the sound is so lovely and not at all soft, like their 899 integrated, which has that E.A.R. weight and genteel tone I hear in many of his designs for his company...
Reading a bit in between the gardening this weekend, a slight 'speaker' background hum may possibly be a weak supply cap if everything else has been isolated. Can't just shell out to find out though, sorry...
|
|
|
|
Post by macca on Sept 30, 2018 9:48:31 GMT
Yeah an off spec cap is what I think too. That's what happens when you leave it switched on 24/7 like an idiot. I know better now ofc.
|
|
