My experience an exowner of krell 300i integrated agreed with the audioasylum fellows. Krell ksa50 amplifier old school toneaudio magazine. In fact, the notion of cold, analytical krell sound appears so widespread, many suggest to mate krell amps only with smoothsounding tube preamps, esp. Unfollow krell ksa 100 to stop getting updates on your ebay feed. Well help you to work out whether its worth paying extra for a highend version or whether youre getting just as good a deal by getting the cheaper item. A number of psu boards to select based on diyers preference. Im building a ksa50 clone based on jims audio boards and his ksa50 clone heatsink. Power amplifier apex ba1200 pcb layout pdf the power produced can reach 1500w. A huge thanks to kevin gilmore and bigir for making this project possible. I owned a ksa 100 in the 1980s, and while memories of sound from decades ago cant be trusted, i can now report the krell sound was just as good as i remembered it. The klone is a clone of the original krell ksa 5 headphone amplifier.
Moreover, while the krell ksa 50 is one of the best sounding solid state amps ever made, it doesnt have the lush midrange of good tube amplifier. We have 1 krell industries ksa50s manual available for free pdf download. I have a mcintosh back in storage in the us which i havent heard yetbought it used on a whim that ill need to power a pair of classic ar9s i also have in storage, but i dont think the mac will be anywhere near as clean as this krell. Kst100 original krell ksa50 baby krell with internal cooling fans, many people think this is still one of the best krells, maybe because more people can afford it second hand. One area that im confused with is the standoffs of the pcb from the heatsink.
Because the ksa50s utilizes sustained plateau biasing patent pending, it remains cool. Krell ksa80 manual stereo power amplifier hifi engine. It is hands down the best amplifier ive ever heard and the new. Krell industries ksa50s manuals manuals and user guides for krell industries ksa50s. Aug 17, 2008 the original ksa 50 and ksa100 were both true dual mono amplifiers all the way back to the line cord. Tight base extends far beyond what one would expect from a sealed 5. Sep 09, 2007 some readers may feel that it is pushing poetic license beyond reasonable limits to call the krell ksa50 a newwave amplifier. Both units were from the early 90s and are around on the used market fairly cheap. View online or download krell industries ksa50s owners reference manual. View and download krell industries ksa50s owners reference manual online. To open downloaded files you need acrobat reader or similar pdf reader program. Components designated 1xx are placed on main pcb components designated 2xx are placed on heatsink or speaker binding posts components designated 3xx are additional output protection circuits all capacitors 100v exept where designated otherwise q111 must be placed on main. Jan 15, 20 krell s build and sound quality were irresistible, it was as simple as that. Krell clone ksa 50 krell ksa 50 clone krell clone ksa 50.
It is a pure class a amp and delivers a very sweet sound. Buy krell amplifiers and get free shipping on aliexpress. This is one sweet amp, probably the best i have ever owned. Krell industries ksa50s owners reference manual pdf download. Amplifier vfet sony ta 4650 with 2sj182sk60 sony ta 4650. Krell industries ksa50s owners reference manual pdf. Krell clone ksa50 krell ksa50 clone krellclone ksa50. Krell clone ksa 50 electrical engineering electronic. Jan 09, 2011 this superb headphone amp set is offered for sale on ebay by theaterboy. Krell used a 400va transformer per channel, ie two per stereo chassis. For example, my quicksilver 25 watt monoblocks have a better midrange in this respect, while lacking the overall dynamics of the krell ksa 50. I recently bought a mint condition ksa 50 the 50 watt amp that arrived in 1982. If youre still in two minds about krell amplifiers and are thinking about choosing a similar product, aliexpress is a great place to compare prices and sellers. Im building a ksa50 clone based on jims audio boards and his ksa50.
Krell ksa50 clone power amplifier service manual free. This is a clone krell s ksa 50 amp which helped put the company on the map during the late 80s and early 90s. Nov 28, 2003 chris, as you can see, there are a couple of krell fans on this forum. I would be surprised if you were disappointed with the performance of the ksa 80, the only drawback is the amount of heat it generates. The sound of the krell is very detailed without being harsh, midrange is fleshed out but not forward nor overemphasized and leaning to neutrality and bass is fast and deepwhat you expect from krells. The krell ksa50 is newwave enough, however, to be an incredibly stiff classa design, rather than a pseudoclassa circuit, and its 50 watts per channel are supported by enough of a power supply to drive an arc. Conclusion while the krell ksa 50ss bass is not quite as awesomely kickass deep as the earlier ksa 50, its midrange is one of the best i have heard from a solidstate design. Apr 30, 2007 been using the krell ksa 50 below since may. Alas, jim sold the ksa50 to a lucky swine who paid him.
The pcbs are basically 99% identical to the original ksa 5. This superb headphone amp set is offered for sale on ebay by theaterboy. Krell clone ksa50 service manual download, schematics. Krell ksa300s manual stereo power amplifier hifi engine. To check it out and see more cool gear click on the link above. A ksa50 should be a wonderful hot running full on classa beast. Please make sure you have read the list below purchaseyou will receive a huge set read list below of various service manuals, owner manuals, schematics andor parts list on dvds. And this amplifier is very suitable for bass amplifiers or for the use of. Jul 29, 2018 i just bought a krell ksa 250 and i have a concern. Download the krell ksa50 manuals for free hifi manuals. It looks very nice and solid, and certainly reminds original krell ksa50, both in aspect and sound. Download the krell ksa50 manuals for free from the biggest krell manual and schematic collection on the web.
An extremely powerful 2 way monitor based system driven by 100w of pure class a authority. Vacuum tube lovers myself being one look elsewhere if you wish to attain the lush mids and bloom in the bass, ksa excels in other areas. One pair ksa50 class a power amplifier board base on krell ksa50 amp l16914. Regarding the krell lineup as far as i know it goes something like this. Weiliang audio replica ksa50 power amplifier or ksl pre. Apr 29, 2016 this set of boards pcbs closely adhere to the original krell ksa50 mk2 or ksa100 design. There was an s version too, dont know what the difference was. Ksa50 pure class a hifi amp board gold seal tube precision. High bias amplifiers dissipate much of the power they consume in heat.934 1258 1252 740 806 595 1302 379 427 156 369 1520 646 977 1281 402 347 290 18 923 1090 1155 1517 657 926 294 775 261 1345 153 1366 1334 489