grasshopper Posted May 28, 2022 Share Posted May 28, 2022 1 minute ago, 001 said: agree 100% , the CR-820 would be pretty good I think @grasshopper has one of these amps I have a CR-840... I'm not familiar enough to know the difference between them. 2 Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 28, 2022 Share Posted May 28, 2022 12 minutes ago, grasshopper said: I have a CR-840... I'm not familiar enough to know the difference between them. the CR 840 is the better product , the preamp is really HQ ---- 60wpc at 8 Ohms , while the CR 820 is 55wpc at 8 Ohms , and the preamp was slightly different 1 Quote Link to comment Share on other sites More sharing options...
Emile Posted May 28, 2022 Share Posted May 28, 2022 7 minutes ago, grasshopper said: I have a CR-840 Think it would be great for the OP if the price is right Only thing is the *40 series seems to have a problem with the STK power packs (???) which are no longer available Specs are here ... 60Wps ... https://www.hifiengine.com/manual_library/yamaha/cr-840.shtml 2 Quote Link to comment Share on other sites More sharing options...
henry4841 Posted May 28, 2022 Share Posted May 28, 2022 I repair and restore old 70's receivers and I stay away from those with the STK power packs. Virtually unattainable but if stuck with an old receiver with bad ones you can replace them some of the newer D boards readily available. Probably sound much better too. 2 Quote Link to comment Share on other sites More sharing options...
billybob Posted May 28, 2022 Share Posted May 28, 2022 Darlington power packs another name for IC are available as NOS or knockoffs. Have a couple in my Authentic series. Some are replacing with discrete circuit if they fail. However it should turn out, would use the units until they should quit. Then can come alternative solution. My unit failed due to switch. Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 28, 2022 Share Posted May 28, 2022 1 hour ago, Emile said: Think it would be great for the OP if the price is right Only thing is the *40 series seems to have a problem with the STK power packs (???) which are no longer available Specs are here ... 60Wps ... https://www.hifiengine.com/manual_library/yamaha/cr-840.shtml STK Powerpacks or Darlington IC Chips sound fantastic in low wattage amps under 80 wpc , they are reliable , long lasting , in comparison to discrete parts that require replacement every 20-30 years , IC chips can last forever , one can drive an IC chip amp , for 40-50-60 years plenty on Ebay for 10$ , easy to replace , are they better than AB discrete amps , maybe not , but they are still great amps 2 Quote Link to comment Share on other sites More sharing options...
grasshopper Posted May 28, 2022 Share Posted May 28, 2022 the 840 makes the amp it replaced sound like it has a sock stuffed in its mouth 2 Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 28, 2022 Share Posted May 28, 2022 28 minutes ago, grasshopper said: the 840 makes the amp it replaced sound like it has a sock stuffed in its mouth yeah , the Sound of IC chip amps is phenomenal in the HF , Yamaha-Sanyo used them because they were High tech at the time in the late 70's to early 80' s 1 Quote Link to comment Share on other sites More sharing options...
the real Duke Spinner Posted June 2, 2022 Share Posted June 2, 2022 Give me TO 55 Quote Link to comment Share on other sites More sharing options...
CWelsh Posted June 2, 2022 Share Posted June 2, 2022 On 5/21/2022 at 6:57 PM, jason.justice said: Thanks bringing this back on topic. what are some new SS amps that would be a good match with cornwalls? I don't know if you really got any help with your question or not. Another forum member went on a quest for the perfect amp for his Cornwalls a few months back and ended up with an AudioLab 6000A. You might want to check out his thread. https://community.klipsch.com/index.php?/topic/203853-the-perfect-integrated-doesn’t-exist…and-it’s-annoying/ Unless you feel the need to push your speakers to levels that will permanently damage your hearing and possibly crumble the foundation of your house (perhaps a little hyperbolic), you can use very low power. As some have already pointed out, your Cornwalls can also withstand huge amounts of power. Personally, like henry4841, I prefer quality over quantity. I'm using Fortes which are slightly less efficient than your Cornwalls and I'm currently driving them with an 8wpc Class A SS amp (Pass Labs ACA) and they play louder than I will ever want to listen and sound incredible. I've also used a very inexpensive Class D amp that is capable of about 80wpc and had no complaints about the sound. The Class A is better, though. Also, a number of forum members are using Class D amps and loving them. The Topping PA5 is very popular and only about $350. You will probably need a preamp of some sort to go with that, but that is also true of the Schitt Aegir. The great news is, there are a lot of amps out there that will pair really well with your Cornwalls. Look for the features you want and pick quality and you will do just fine. As Corey points out in his thread, there isn't one perfect amp for the Cornwalls...there are lots of them that you may find to be perfect for you. Have fun in your search and let us know where you end up. 1 Quote Link to comment Share on other sites More sharing options...
the real Duke Spinner Posted June 2, 2022 Share Posted June 2, 2022 I would not think of running under 200 wpc for dynamics My experience with anything less has been underwhelming 1 Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 3, 2022 Share Posted June 3, 2022 Cornwalls will have absolutely top notch dynamics with <50 watts. I've heard it so with as little as 15 watts. Then again, all amplifiers are not created equal. 200 watts in a receiver can sound utterly anemic. Quote Link to comment Share on other sites More sharing options...
jason.justice Posted June 3, 2022 Author Share Posted June 3, 2022 thanks for all the info on this thread. i still don't know what i'm going to pick lol. i should've added this is for 2 channel and music only. no HT application. Quote Link to comment Share on other sites More sharing options...
jason.justice Posted June 3, 2022 Author Share Posted June 3, 2022 10 minutes ago, Shakeydeal said: Cornwalls will have absolutely top notch dynamics with <50 watts. I've heard it so with as little as 15 watts. Then again, all amplifiers are not created equal. 200 watts in a receiver can sound utterly anemic. here's where i'm getting stuck. i understand that CW are highly efficient and can/will sound great with low watts. however i'm assuming those using low power are in small rooms. if i'm in a big room, say the size of a small restaurant, i'm assuming i will need more power than 20W. thoughts? Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 3, 2022 Share Posted June 3, 2022 My room is probably a little above average size. It's 26 x 15 and I tend to listen louder than any of my friends. I had absolutely no issues with the CW IV at 20 watts. Same goes for my LS II now. Plenty of power. It's quality over quantity with these speakers. 1 Quote Link to comment Share on other sites More sharing options...
jason.justice Posted June 3, 2022 Author Share Posted June 3, 2022 20 minutes ago, Shakeydeal said: My room is probably a little above average size. It's 26 x 15 and I tend to listen louder than any of my friends. I had absolutely no issues with the CW IV at 20 watts. Same goes for my LS II now. Plenty of power. It's quality over quantity with these speakers. with your CW and 20W amp how far are you turning that up in your room? Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted June 3, 2022 Share Posted June 3, 2022 The position of the volume knob is irrelevant, if that's what you are asking. As for SPL, I normally listen between 85 and 95 db. Quote Link to comment Share on other sites More sharing options...
CWelsh Posted June 3, 2022 Share Posted June 3, 2022 4 minutes ago, jason.justice said: with your CW and 20W amp how far are you turning that up in your room? The real question should be, how big is your room (total volume) and how do you want to listen? If you're truly in a small restaurant and need to play over the top of a lot of people, you will need more power from the amp. If it is just you listening at a moderate volume, you won't need as much. How anyone else listens isn't really going to help you unless you can compare it to your personal needs. Quote Link to comment Share on other sites More sharing options...
jason.justice Posted June 3, 2022 Author Share Posted June 3, 2022 yep i get it. i'm just trying to get sense of what i need knowing that the room will constantly be changing. i'm leaning toward get 1 Schiit Aegir and if it's not enough stepping up to 2. Quote Link to comment Share on other sites More sharing options...
OO1 Posted June 3, 2022 Share Posted June 3, 2022 5 minutes ago, jason.justice said: yep i get it. i'm just trying to get sense of what i need knowing that the room will constantly be changing. i'm leaning toward get 1 Schiit Aegir and if it's not enough stepping up to 2. @vondy is selling a Yamaha A-S 801 -100wpc integrated / DAC /fabulous pre-amp , ideal for a set of Cornwall IV -and it blows away the Aegir , hands down . Quote Link to comment Share on other sites More sharing options...
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