Alan Surrey
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Do let us know how they sound 
SM Audiophiles?
- Thread starter Team GCR
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Wack61
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I bought them cheap because the guy just wanted them gone
The only issue is the CD player , repair guy says it's working but sometimes struggles to lock on , pretty sure it's not the laser as the waveforms are good , which is handy as they're no longer available from Roksan
I know none of it has been used for at least 6 years so they're going to run it for a few days to see if it improves
The only issue is the CD player , repair guy says it's working but sometimes struggles to lock on , pretty sure it's not the laser as the waveforms are good , which is handy as they're no longer available from Roksan
I know none of it has been used for at least 6 years so they're going to run it for a few days to see if it improves
CatmanV2
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Did Roksan make their own laser transports? That seems unusual. They were normally generic Japanese units.
C
Wack61
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On pink fish somebody said it was a sanyo laser This is the reply I got
It is that model yes.. but the 6/6 version as there are at least 3 types.. There are sellers out there touting 'new' ones, though none have been made for maybe 25 years.. We would have to risk trying one..probably the Liberty electronics one. I'm also not 100% it is the laser.. the waveform looks good , and once locked on it runs, but it has glitches causing mis-track lock ... a bit weird.
It is that model yes.. but the 6/6 version as there are at least 3 types.. There are sellers out there touting 'new' ones, though none have been made for maybe 25 years.. We would have to risk trying one..probably the Liberty electronics one. I'm also not 100% it is the laser.. the waveform looks good , and once locked on it runs, but it has glitches causing mis-track lock ... a bit weird.
CatmanV2
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So that would sound more like the servo / or controller in the transport (to me, but I'm barely an amateur) or grot / wear on the transport mechanism.
C
Wack61
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No there's probably still a profit in them without the CD player , I'm going to get them , probably Saturday and try them out , he said he used the integrated as a pre-amp and the 2 power amps one per speaker though as they're stereo power amps and a stereo integrated I'm not really sure how that works
Alan Surrey
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"Two stereo power amps, one per speaker..." I may have miscounted or misunderstood, but did he bridge them into his speakers and go seriously loud?
Wack61
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That's what I assumed , I wasn't really paying attention
CatmanV2
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That would be my guess. I assume the integrated has pre-outs.
You wouldn't need active crossovers assuming your speakers have bi-wiring posts
C
CatmanV2
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Although the amps may be switchable mono as well. Pretty much the norm for Cyrus power amps. Something I've considered as my speakers actually don't have bi-wire capability
C
Wack61
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Verdict is in , very very goodDo let us know how they sound
At the moment I'm streaming tidal master through an audioengine B1 to a music first audio passive pre amp then to the Roksan Caspian power amp played through the Spendor S6e
I was really impressed with the detail and separation the Naim Unitiqute had, this combination has the detail but with a lot more ooomph
CD player is hit and miss though , the only suggestion he had was if another one came in for repair he could try swapping the board with mine to see if that fixed it , at least I'd know it was a faulty board then
Wack61
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Just picked up an open box Arcam SR250 from richer sounds for £500
This was over 2k a few years back and still makes £850 on eBay with no warranty!
There's a few stores that still have open box stock
It's a rare thing , a stereo home cinema amp with class G amplification and a high end DAC
Mine arrives Tuesday
www.audioadvice.com
This was over 2k a few years back and still makes £850 on eBay with no warranty!
There's a few stores that still have open box stock
It's a rare thing , a stereo home cinema amp with class G amplification and a high end DAC
Mine arrives Tuesday
Arcam SR250 Stereo Receiver Review
The Arcam SR250 Stereo Receiver includes Class G power, great DACs, and Dirac room correction. Read our complete Arcam SR250 Stereo Receiver Review!
www.audioadvice.com
Alan Surrey
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I have clearly missed a few letters. My hifi has a good old class AB output stage (and, I think, sounds pretty good.) In the kitchen I have class D and it sounds perfectly ok in the kitchen, but what is class G? And can anyone tell me what E and F were?
I have been told that the annexe to the church I used to attend has a professional digital (D) output stage of a few kilowatts and sounds sweet and detailed as you would hope, even against the professional AB equipment in the main hall. So I'm not against digital output stages.
I have been told that the annexe to the church I used to attend has a professional digital (D) output stage of a few kilowatts and sounds sweet and detailed as you would hope, even against the professional AB equipment in the main hall. So I'm not against digital output stages.
Wack61
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Apparently class G uses the best parts of class A & AB combined , or something
Arcam features a Class G amplifier section in the SR250. This amp is rated at 120 watts per channel into an eight-ohm load and it will almost double down to 210 watts per channel into a four-ohm load. Arcam has a couple of other products that incorporate their Class G technology; however, we feel it is somewhat misunderstood as to just how good it is!
In basic terms, musical waveforms have a top and bottom half. Each half requires an output device in the amplifier section. When the signal switches from one device to the other, distortion can get into the sound. This happens since the output devices are turning on and off. In the perfect amplifier, they would never turn off which would eliminate the switching distortion as it’s called. There is a design like this, and it's called Class A. A pure Class A amplifier might only produce 20-30 watts and weigh in at 50-100 pounds. When those output devices are on all the time, a lot of heat is generated. Some pure Class A amps can make a room very hot! These types of amplifiers are still made, but they are limited to the ultimate purest who is willing to put up with both the heat and size of the amp.
Class AB is used in most good receivers and amplifiers today. It is an offshoot of Class A, but the output devices turn off to reduce heat build-up. Circuitry is added to reduce the switching distortion. Class AB is not as pure as Class A, but it is a great option for lots of power and a smaller, more efficient package.
Class D is a more recent design, and at first take, you might think the D stands for digital, but it actually does not. This type of design is almost 100% efficient, gives off very little heat, and takes up less space. So far it sounds like the ideal amp design, right? For some situations, like touring sound where you need thousands of watts in something portable, it is ideal. On the opposite end of the spectrum, it also can be so small it is used in hearing aids and portable speakers. The one catch to Class D is its ultimate audio quality. Many listeners think it has a harsh, somewhat tinny sound, and we agree. You don’t want to spend thousands on a new amp and come out with harsh sound, you want it pure, smooth, and dynamic.
Ok, we have Class A, AB, D, and they have each gotten progressively worse, right? How can Class G be any good? We are not sure who came up with the naming scheme for Class G, but we think it is why many people do not consider it. In reality, Class G is actually the best of both Class A and Class AB combined. The first Class G amp actually came out in 1977 and was from Hitachi. Way back then, that was one sweet sounding amplifier!
If you were to put a meter on your amp and measure how much power it uses at low to moderate listening levels, you would find it is only using a couple of watts of power. If you have fairly efficient speakers, you may never get past 5 watts of power 90% of the time. What if there was a design that could run at pure Class A for this type of power consumption, then switch over to Class AB when you needed the extra horsepower? That is exactly what Class G does! The “G” should stand for Class “Great”. For most of your listening, the amp runs at the best possible power mode, pure Class A. It really is a wonderful idea on how to design a power amp.
The best design without great support circuitry will not sound great, but Arcam has done a remarkable job on the SR250. If you pop the cover you will find a huge toroidal power supply that supports the Class G power amp inside. The sound this amp produces is super smooth and sweet, yet when a demanding passage comes along, it delivers all the dynamics!
zagatoes30
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I must be getting old use to love all this stuff mixing and matching components to get the next step up but then I realised, within my budget, I was always compromising between pure Stereo Hi Fi and Digital Surround Sound. I eventually decided that when I sit and listen it is always music so gave up on surround and just set-up a stereo setup that I like. I could upgrade again but the next move means moving to separate power supplies for all components, I keep my eye out for the bits I need and might one day bite the bullet but for now I just listen and enjoy