bifwynne
Responses from bifwynne
| MAC Autoformers? @ramtubes So Roger, …. bottom line, do you concur that using the 4 ohms taps on my Ref 150SE should yield a flatter FR, less distortion and longer tube life?? I gather you are saying yes. P.S. the ARC engineers obviously were trying to balance a l... | |
| MAC Autoformers? @ramtubes Thanks Roger. Thought you might find the attached websites of interest. Atkinson tested an earlier version of my amp, the Ref 150. The test results should be comparable to my amp, the Ref 150SE, because the Ref 150and Ref 150SE share ... | |
| MAC Autoformers? @ramtubes Roger, you wrote that "a typical 100 watt amp puts out 100 watts into any matched tap and somewhere around 75 watts into a tap mismatched by one step. In this case the tube are loafing along, distortion is reduced and damping increased. ... | |
| Autoformers, The Benefits in matching amp to speaker Roger, your comments about speaker crossovers is very interesting. Passive crossovers present another issue: phase coherence problems. I tried to deal with the issue of phase coherence caused by higher order crossovers with a DEQX device. I in... | |
| MAC Autoformers? bdp24, … see my post to Ralph and Roger about the same question. Theoretically, the 4 ohm taps should work better. In my case, I subjectively think the 8 ohm taps simply sound better and I do not know why. | |
| MAC Autoformers? @ramtubes --- Roger, thanks for responding. Yes, ... there is only one bias pot to control the bias of a pair of KT-150s. The bias pot is used to adjust the bias in mVs of the set tube. ARC recommends 65mVs. The other tube in the pair is a sl... | |
| MAC Autoformers? @ramtubes. Sorry for not being current with the handles of some of our members, but if you are Roger M, I have a few questions. Matching KT-150s in my ARC Ref 150 SE amp is a bitch. ARC sourced tubes match much better. When I refer to matching, ... | |
| MAC Autoformers? @bdp24 I checked out the Roger Modjeski YouTube video. Awesome. I've often observed that there are 3 types of smart people in the world, namely: regular smart; very smart; and scary smart. Roger is scary smart and down to earth at the same tim... | |
| MAC Autoformers? @atmasphere- Ralph, thanks for your response. So, … given that most speakers on the market today are probably voiced to be driven by solid state, voltage source amps, why should one bother with tube amps, especially tube amps that do not use neg... | |
| MAC Autoformers? @atmasphere … Ralph, I have gone back and forth between the 4 ohm taps and the 8 ohm taps over the years. Theoretically, the 4 ohms taps should sound the best for the reasons you just said (Atkinson estimates .5 or lower ohms off the 4 ohm taps),... | |
| Have DAC’s improved for Redbook CD playback? Been checking out streaming sources and was thinking about a DAC for that purpose. I currently own an ARC Ref CD-8, which uses a Burr-Brown PCM1792 chipset D/A converter. As to the OP's question about whether redbook DACs have improved much,... | |
| Have DAC’s improved for Redbook CD playback? I play a lot of redbook CDs off my ARC Ref CD-8 CD player. The CD-8 was discontinued in 2013, but still sounds very good to me. I would appreciate hearing from some of our tech members, but here's a lay person reaction. Redbook CDs are a 30++ y... | |
| MAC Autoformers? @atmasphere Ralph, could you clarify a point regarding impedance matching between tube amps and speakers with roller coaster impedance and phase angles numbers. I think you mentioned that the function of an output transformer is to step down the... | |
| Spotify or Pandora Just went on Tidal web site. OK, ... so walk me through how I get the Tidal music into my linestage. I do not have a DAC, other than what is in my PC. So the music signal from the PC to the linestage has to be in analogue format.So, how do I co... | |
| Tube vendor recommendations? I've used Upscale Audio over the years with no problems. I generally order tubes via the UA website, so I do not have to deal with humans very often. No comments about Kevin. I haven't dealt with him very often over the years.That said, my tube... |