Bonky
Rank: Trio
Posts: 156
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Post by Bonky on Apr 10, 2015 8:30:04 GMT
Hi all.
I've been a lurker and contributor on another forum (AoS) and thought, like others, that it's about time to spread my wings.
Details:
Richard
Location: Sheffield/Peak District. UK Interests: Long-bow archery; Steam trains; model trains. Occupation: Retired Biology Lecturer.
My Gear Source component/s Linn Mimik2 Cd player; Inspire Apollo deck + Roksan Nima arm + AT-0C5MC; Pioneer F656 tuner; Cambridge DAB500; Aiwa R650 Cassette Deck. Logitech Squeezebox Touch. Amplification Sugden A21a; Mini-T (amptasitc). M-stage Headphone amp. mega Brio-R Loudspeakers: Living Voice auditorium IBX-R2 Cables/stands: Van Damme Blue Any other hi-fi bits: Beresford Caiman 2+ Gato DAC; Bushmaster DAC; Apple's airport express; Apple iMac i5; Senn HD598, 467, 650. Squeezebox Touch
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Post by ChrisB on Apr 10, 2015 8:38:01 GMT
Hi Richard, Welcome to TAS, it's nice to see you here.
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Post by MartinT on Apr 10, 2015 9:38:42 GMT
Hello Richard and welcome to TAS! Those Living Voice speakers are interestingly different, bet they're efficient.
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Post by John on Apr 10, 2015 10:21:37 GMT
Welcome to TAS Richard
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on Apr 10, 2015 10:30:24 GMT
Hello Richard and welcome to TAS! Those Living Voice speakers are interestingly different, bet they're efficient. Thanks everyone. Yes, Martin, the LV speakers are very efficient...just as well really as the Sugden is only 25 Watts RMS per channel. Later on tonight I plan to compare the amp with a Rega Brio-R. BW Richard.
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Post by MartinT on Apr 10, 2015 10:43:19 GMT
My guess is the Sugden and Rega are going to sound quite different.
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on Apr 11, 2015 11:59:41 GMT
My guess is the Sugden and Rega are going to sound quite different. Martin, surprisingly not! I hope it's OK to cut and paste a report I made in another forum: The story so far: I have a Linn Mimik2 cd player with a BNC output. I wanted to by-pass the Linn’s DAC and use a Caiman2 DAC instead. AoS members, as usual have been very helpful and have prompted me in the right direction for a suitable lead, which I bought. (I later found I had one in an old cupboard!). So this is my report: The waters are somewhat muddied by: I replaced the wall socket with a MK unswitched one (The 2 neutral wires were loose in the old socket), and I cleaned all the prongs on the mains plugs. I bought a 2nd hand Rega Brio-R so was keen to see if the SQ was better/different cf my Sugden A21A amp. I should also add that Stan’s firmware upgrade came this morning so yet another variable into the mix! Using the Sugden: At first I could detect no difference between the normal CD output (via the Linn DAC) and Stan’s. This says, I believe, a lot for the oldish (1995) design of the Mimik2. Slowly and gradually I could hear that female vocals were more open and less sibilant. Violin strings too showed a small improvement. I could detect no differences in the bass. Surprisingly, when I used the Rega amp I could detect NO difference at all between the two sources. Make of that what you will… I repeated the experiment this morning (no alcohol) and came to exactly the same conclusions. I must tell a tale against myself here… I plugged in Stan’s new RiSC chip and sat back and listened…yep…it was all that people had said… better, more affirmative bass, less of a veil etc etc. It was after 20 mins or so that I realised that the sound wasn’t going through the Caiman2 at all but from the Linn to the Rega! What I was hearing was the wishful thinking/others’ reports/placebo effect. When I did sort myself out , as I said above, I could not discern any differences between the CD output and the BNC to the Caiman2 and then to the Rega. So, back to the Sugden… (Would Stan’s upgrade make an impact?) Yes; Stan’s DAC was slightly more open and transparent; not ‘night-and-day’ by any manner of means, but an improvement. Using high-def files streamed to the Squeezebox Touch I was able, again, to hear that Stan’s firmware upgrade made a difference - with better definition of instruments and vocals. (BTW I should add here that I’m 67 years old so my HF must be compromised somewhat). Tonight’s experiments (my wife is away for the weekend), will involve comparing the phono inputs on the two amps. The one in the Sugden (both MM and MC) is not given the plaudits it deserves. (Patrick of Sugdens told me this(!)…and I agree.) However, this is outside the title of this thread so I will stop here. I expected there to be significant differences in SQ between the two amps. I found this not to be so. Did I read somewhere that the Rega has some sort of quasi Class A output stage? Thanks for anyone’s interest and help. BW Richard
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Post by MikeMusic on Apr 11, 2015 17:44:11 GMT
Hi Richard
Welcome to TAS
That Caiman upgrade gave me quite a surprise. Pioneer 703 into a Chord integrated
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Post by MartinT on Apr 11, 2015 19:59:15 GMT
Thanks, Richard. There is no such thing as quasi-class A. It's either proper class A or more likely high or sliding bias class AB.
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on Apr 11, 2015 21:38:48 GMT
Thanks Martin, I'm not sure I understand all the technical details here.
If the Rega is running AB than I for certain cannot hear any x-over distortion.
The Sugden (25w + 25W) certainly exudes much more heat than the Rega (50W + 50W).
Thanks, Richard
PS the 2 phono stages now compared. If anyone is interested, I can post a short review... but where?
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Post by MartinT on Apr 11, 2015 21:50:49 GMT
Sugden claims class A for many of their amps but I think (looking at the relatively low amount of heatsinking) that it's a high bias class AB. This can still have sonic benefits as more of the power band is reproduced in class A. The Rega is likely a low idle current class AB design. So at idle the Sugden dissipates more heat than the Rega, despite the latter being rated at a higher maximum power.
Phono stages should be discussed in Source Components.
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Post by Sovereign on Apr 12, 2015 9:21:43 GMT
Welcome bonky
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on Apr 24, 2015 16:12:47 GMT
Thanks everyone for the warm welcome.
Richard
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