autoformer attenuator and step up transformers
hi dave. would you please kindly explain why you would place the step up transformer after the autoformer and not before? also,why would you only use it if absolutely necessary? my second question to dave is whether your autformers sound better or work more optimally when used on their lower half to the volume control (from 7 o'clock to 12 o'clock i.e. greater attenuation) vs the upper half of the volume control (from say 1 o'clock to 5 o'clock i.e. less attenuation)? i read that being on the lower end of the volume control drops the output impedance but if that is a non issue, does it matter with regards to sonics which setting on the autoformer i use? |
hi al. thank you for replying to my post. since i am not very good at figuring out impedance issues i will go ahead and tell you about my equipment and you can tell me if you forsee a problem. also, do you know why dave from intact audio suggested putting the step up after the autoformers? i am using a revox b77 reel to reel player(http://www.reeltoreel.de/worldwide/B77.htm) , the intact audio autoformers, and monoblocks with 137k input impedance. thank you again :) |
hi dave. thank you for the detailed explanation. so far, i have been able to reach a volume that is quite loud in my room without using a step up transformer but rather turning up the autoformer volume control within 3 clicks of maximum (i.e. at 3 o'clock). this leads me to my second question which i really hope you would take the time to answer as well: do your autformers sound better or work more optimally when used on their lower half to the volume control (from 7 o'clock to 12 o'clock i.e. greater attenuation) vs the upper half of the volume control (from say 1 o'clock to 5 o'clock i.e. less attenuation)? i read that being on the lower end of the volume control drops the output impedance but if that is a non issue, does it matter with regards to sonics which setting on the autoformer i use? |
