jkn Posted July 20, 2007 Posted July 20, 2007 THEORY OF OPERATION The primary goal in designing our 211 SET is to manifest the intrinsic sound of 211. The choice of driver tubes and how they are coupled to 211, are critical to whether the purity of 211 sound is retained. Most exisiting designs, using interstage transformers and/or other SET such as 300B or even power pentode such as 6L6 as drivers, will inevitably bring coloration to 211. 5687 is a classical driver tube that is very neutral sounding in nature. However, it is very difficult to properly couple it with 211 without the help of interstage transformer. Nevertheless, Opera solves the problem and 5687 is driving 211 without interstage trannies. There is also a significant difference with those four stages design ( input, driver, buffer, and output , the driver is coupled to output stage through buffer), Cyber 211's driver is directly coupled to 211 without buffer. Therefore there are only 3 stages . Another important factor is the output transformer design. We use a special alloy cocktail. The dielectric material, instead of using modern polys or even teflon, is a classical material: paper (purposely treated of course). TECHNICAL SPECIFICATION FOR 211 OUTPUT TUBE VERSION: (We stock the Cyber 845. Cyber 211 is order only) CONTROL FUNCTIONS: Power On/Off POWER OUTPUT: 16 watt, RMS 1kHz TOTAL HARMONIC DISTORTION: less than 1% ( 10watt, 1kHz ) FREQUENCY RESPONSE: 5Hz - 47kHz ( -3dB) INPUT SENSITIVITY: 0.6V INPUT IMPEDANCE: 100k ohms OUTPUT: 4, 8 ohms. User selectable. SIGNAL/NOISE: 90dB CONSUMPTION: 150 watt x 2 INPUT INTERFACES: 1 group ( RCA ) VACUUM TUBE: NOS E88CC x 2, NOS 5687 x 2, 211 x 2 DIMENSIONS: 420 (L) x185 (W) x330(H)mm x 2 EIGHT: 30kg x 2 ( packed ) TECHNICAL SPECIFICATION FOR 845 OUTPUT TUBE VERSION: CONTROL FUNCTIONS: Power On/Off POWER OUTPUT: 28 watt, RMS 1kHz TOTAL HARMONIC DISTORTION: less than 1% ( 15watt, 1kHz ) FREQUENCY RESPONSE: ( -3dB points at 15 watt ) 5Hz - 47kHz INPUT SENSITIVITY: 1V INPUT IMPEDANCE: 100k ohms OUTPUT: 4, 8 ohms. User selectable. SIGNAL/NOISE: 90dB CONSUMPTION: 150 watt x 2 INPUT INTERFACES: 1 group ( RCA ) VACUUM TUBE: NOS E88CC x 2, NOS 5687 x 2, 845 x 2 DIMENSIONS: 420 (L) x185 (W) x330(H)mm x 2 WEIGHT: 30kg x 2 ( packed ) The 211 is more musical across the midrange, but the 845 has extra power, scale and authority, and is better with dynamic contrasts. The choice of which amplifier depends on the efficiency of your speakers, and they type of music you play, and the volume you want to achieve. The Cyber 800 does everything well and is a great "all rounder" The Cyber 845 has less power and authority, but has much quieter backgrounds, more transparency and better imaging. They are exceptional with speaker efficiencies above 90db and with folk, orchestral, vocal and instrumental music. If you wish to play Heavy Metal, large drums or loud rock music, they do it well, but with limitations, and the Cyber 800 is the better choice. With lower volumes and less demanding music, then the Cyber 211 is the ultimate. The Cyber 845 is the best compromise within the Cyber range for a wider musical choice and is a truly exceptional amplifier and is awesome mated with the R1.1 or preferably the R1.3 pre amplifier.
Moondog Posted July 20, 2007 Posted July 20, 2007 So if anyone interested make an offer. I can't give it away to paid for another project so please be reasonable. Snip[/b] Good luck with the offer JiriAu . Boy Have you got a bad case of upgradeitis , Have you listened to something better and fallen in love Moondog
jkn Posted July 20, 2007 Author Posted July 20, 2007 Good luck with the offer JiriAu . Boy Have you got a bad case of upgradeitis , Have you listened to something better and fallen in loveMoondog[/b] Thanks mate there is nothing certain and too early to say yet. I will keep the 845 if no one interested as they are good amps.
mondie Posted July 20, 2007 Posted July 20, 2007 l would be interested except you are in Qld, thats too bad for me as l could not purchase such an amp without hearing it in my system first Good luck with the sale :biggrin:
jkn Posted July 20, 2007 Author Posted July 20, 2007 l would be interested except you are in Qld, thats too bad for me as l could not purchase such an amp without hearing it in my system firstGood luck with the sale :biggrin:[/b] Thanks mondie no problem. There could be some people from this forum having those amps if you are really interested Cheers Jiriau
jkn Posted August 23, 2007 Author Posted August 23, 2007 1 Pair sold 1 pair still for sale $ 3000 for a pair + delivery cheers JiriAU
mondie Posted August 23, 2007 Posted August 23, 2007 jch, did you sell them to a forum member? if so would you mind sending me a PM with their name, would like to hear what they think of them, and what speakers they are running Cheers Mondie
jkn Posted August 24, 2007 Author Posted August 24, 2007 jch, did you sell them to a forum member? if so would you mind sending me a PM with their name, would like to hear what they think of them, and what speakers they are runningCheers Mondie[/b] Hi Mondie I have sale them privately (e buy) as a mater of fact a bloke from Melbourne I will send them next week provably Monday. I believe that this person is leaving overseas next week but I will ask him if I can pass his e mail to you Regards JiriAU
Guest Posted February 20, 2014 Posted February 20, 2014 This item has been withdrawn from sale or relisted.
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