DRBILL Posted March 24, 2005 Share Posted March 24, 2005 Some of my friends love to play "stump the Doc," and they usually succeed. "What if you have two identical 20W tube amplifiers --can you connect them in parallel to produce 40W of headroom?" For example, common to common, 8 ohm to 8 ohm? I had to admit that I didn't have a clue. My gut reaction was that it was a bad idea. I'm anxious about feedback circuits, etc. What would it do to damping? What about the slight phase-shifts that are unique to each amplifier? Would the inherent "noise and hum" of each amplifier double? And on and on. I'm also aware that the ST-70 has a mono switch, just for this purpose but I have had no occasion to try it. Does anybody know for sure? DR BILL Quote Link to comment Share on other sites More sharing options...
dodger Posted March 24, 2005 Share Posted March 24, 2005 ---------------- On 3/24/2005 4:49:04 PM DRBILL wrote: Some of my friends love to play "stump the Doc," and they usually succeed. "What if you have two identical 20W tube amplifiers --can you connect them in parallel to produce 40W of headroom?" For example, common to common, 8 ohm to 8 ohm? I had to admit that I didn't have a clue. My gut reaction was that it was a bad idea. I'm anxious about feedback circuits, etc. What would it do to damping? What about the slight phase-shifts that are unique to each amplifier? Would the inherent "noise and hum" of each amplifier double? And on and on. I'm also aware that the ST-70 has a mono switch, just for this purpose but I have had no occasion to try it. Does anybody know for sure? DR BILL ---------------- Hi Dr. Bill: Not knowing the brand I know that's the way McIntosh Stereo Amplifiers are Strapped to Mono. The 240s I Ihave cane be run as Stereo, Twin or Mono - each having a separate postion on a throw switch. When run as Mono, you bridge (I have found from advice from a friend and playing) that Klipsch like the 4 ohm tap, so 4 ohm to 4 ohm, ground to ground. I've never noticed any difference even when A/B ing LaScalas. No phasing or any of the other potential problems that you mentioned. Hope this help. Win dodger Quote Link to comment Share on other sites More sharing options...
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