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Integrated amp for Shahinian obs Mk1

rogerredhat

pfm Member
After selling all my olive Naim kit I am now looking for an integrated amp for the obs
I was using a NAP 250 previously

Any views on small wattage class A amps from the likes of Sugden ?
 
After selling all my olive Naim kit I am now looking for an integrated amp for the obs
I was using a NAP 250 previously

Any views on small wattage class A amps from the likes of Sugden ?
Feel free to borrow the EWA Claymore that's doing the rounds, it should work well. It's A/B but runs the first few Watts nicely in A.
 
In my experience, any amp will do, but to get the most out of them some power is required otherwise the sound will fall a long way behind what they are capable of. I have used a variety of amps with my mk2’s and they all work but the JVC 1010 and the Dynavectors were the best. I have used a 100 watt Audio Analogue with some success but it lacks the majesty that the other two bring and it’s not a lightweight amp and will drive most speakers with ease. The mk1’s are generally regarded as being more demanding and I only ever tried mine with Dynavectors.
 
Just about any amp will do.

S.
This is true if you just want them to make a noise. If you want to hear them as Dick intended, then you will need sufficient current to enable the bass/passive arrangement and the super tweeters to all work correctly at the same time. You will also need something with a suitable slew rate and damping factor. Current output can usually be found in the manufacturers specs (though not of course Naim, as excepting Statement, it’s pitiful), the last two take a lot more digging, but can usually be found in quality reviews. Dynavectors are excellent in all these regards, but are almost impossible to find now. I have never heard one, but I am informed by people’s whose opinions I trust that the Rega Osiris is an excellent choice.
 
In my experience, any amp will do, but to get the most out of them some power is required otherwise the sound will fall a long way behind what they are capable of. I have used a variety of amps with my mk2’s and they all work but the JVC 1010 and the Dynavectors were the best. I have used a 100 watt Audio Analogue with some success but it lacks the majesty that the other two bring and it’s not a lightweight amp and will drive most speakers with ease. The mk1’s are generally regarded as being more demanding and I only ever tried mine with Dynavectors.

This.
 
Densen and Gamut produce integrated amps that may well be about as good as it gets ? Very expensive though.
If a Gamut integrated amp in black came up for sale pre owned id be tempted. Put it up against what I've currently got.
 
Thanks for all the comments.

I was looking into the Plinius integrated amps.
I did enquire about a Hiato that was for sale, which was ex demo from a dealer.
(Not heard back ,but the unit was out on demo)

To me the output seems a lot ,but a recommended manufacturer.

When I bought the speakers the only amp the seller had at the time was a Class A 10w amp
To me It sounded very good hence my thinking.

With the Naim amp the volume control was always about 8 o'clock ,so not looking for high volume.

Not got the space now for for lots of boxes so the integrated is my option now.

Small Class D amps seem to have a lot of power and seem to double the power as the impedance drops.
Any views on these amps

Thanks
Graham
 
Thanks for all the comments.

I was looking into the Plinius integrated amps.
I did enquire about a Hiato that was for sale, which was ex demo from a dealer.
(Not heard back ,but the unit was out on demo)

To me the output seems a lot ,but a recommended manufacturer.

When I bought the speakers the only amp the seller had at the time was a Class A 10w amp
To me It sounded very good hence my thinking.

With the Naim amp the volume control was always about 8 o'clock ,so not looking for high volume.

Not got the space now for for lots of boxes so the integrated is my option now.

Small Class D amps seem to have a lot of power and seem to double the power as the impedance drops.
Any views on these amps

Thanks
Graham
Hi, sorry, no experience of class d.
My own experience with Shahinian might help you.
Had Obs 1 with a NAP 250. Two problems, couldn’t hear what all the fuss was about from these ‘wonder’ speakers and the amp would frequently cut out. So moved them on.
Then went onto Arc 1’s. Much better, the sound was wonderful, but the amp still occasionally cut out, so tried a pair of NAP 135’s. Rather wonderful, so kept them for years.
Then a pair of Obs 2 came up for sale at what I consider a bit of a steal. They sounded good, but I couldn’t really hear any great difference to the Arcs. On some recordings, they were actually worse. And the bloody 135’s now started to cut out after years of faultless operation with the Arcs! This can’t be right, so I did a bit more research. I bought a power amp with the qualities I described in a previous post. Revelation. The most startling thing was the bass/passive unit. It was as if it was just turned off with the 135’s. It must of been doing something, as I had bass before, but not like this. A whole portion of the music that had been entirely missing before was now revealed. That first listening session with the new power amp was a long one. I’m not good with hifi speak, but I’ll attempt to describe the second difference. The music was deeper (front to back) and taller (top to bottom). But it was also wider, much wider, on some recordings sit up startlingly wider. Sounds seemed to be coming from everywhere. As the amp settled in to it’s new home, on good recordings, the speakers entirely disappeared. Finally, I could hear what all the fuss was about. Hope this helps, if I was in your shoes and you really want an integrated, I’d look for an Osiris.
 
Everything said so far is of course wrong and the usual result of people believing what it says in hi fi mags...

A 10W class A amp could be used so long as the OP is not after high volumes. The important thing is what type of 10W class A amp it is! In fact whether or not it's class A isn't even the important bit here, rather it must be able to drive a relatively awkward load, hence it's going to be solid state and push pull for a start. I can't think of a suitable commercially made example but I have 16W class A monoblocks of my own design here which would drive them no problem (not available!).

Slew rate is irrelevant and very few direct coupled solid state amps would have insufficient damping factor. Quad 303 and Sugden A21 definitely not suitable! Beyond that it's mainly down to how loud the OP wants to play them.

An old Krell KSA50 or 100 would be bloody marvellous!
 
Jeez, you missed your vocation in life, you should of earned your crust as a court jester. Pub’s kicked out early?

See my avatar? See that it says "Trade: Amp design and repairs"? See just some of the electronic test gear on my bench in said avatar? And you've been an electronic engineer specialising in amplifier design for how many years???? An R&D engineer with how many companies? You know far less then zero. Like most hi fi enthusiasts. You haven't a clue what anything I said even means or it's implications

See folks this is the problem I'm up against all the time... almost everything said in the mags and on forums is complete bollox and yet it's where all the gobby ones get their "knowledge":D
 
See my avatar? See that it says "Trade: Amp design and repairs"? See just some of the electronic test gear on my bench in said avatar? And you've been an electronic engineer specialising in amplifier design for how many years???? An R&D engineer with how many companies? You know far less then zero. Like most hi fi enthusiasts. You haven't a clue what anything I said even means or it's implications

See folks this is the problem I'm up against all the time... almost everything said in the mags and on forums is complete bollox and yet it's where all the gobby ones get their "knowledge":D
https://www.smiffys.com/collections/jester-costumes
 


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