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Amplifier: Krell KSA 80 Amplifier goes through the power-on sequence properly until the output relay should energize. The relay 'chatters' briefly and there is no output to the speakers.

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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jason

  • 905 Answers

SOURCE: leem m86t power mixer amplifier

probably blew the amps or the pre amp section

Posted on Oct 08, 2008

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ABRsvcs

  • 4234 Answers

SOURCE: no audio output - Marantz 2238

This can be as simple as a poor connection somwhere in the voltage regulator circuit or a defective driver transistor or output transistor. In any case, this is a simple repair for any shop that works on vintage receivers. If it is the outputs, that will be the most expensive repair from a parts perspective. The outputs will cost in the $5-$10 range for each one and it could be 2-4 pieces. If you wish to attempt this repair yourself, you will need a multimeter that has a diode checker. Let me know and I'll provide additional details and instructions.

Dan

Posted on Apr 06, 2009

dunnbiker

David Dunn

  • 8546 Answers

SOURCE: Amplifier Power & Speakers

It's a common misconception that a high-powered amplifier will hurt a speaker when the opposite is more true.

Power ratings are specified within certain parameters at or below certain distortion levels. The problem with UNDER-powered amplifiers is that when they reach for the loudness beyond their clean capabilities they get really dirty and start to distort their output. Distortion will kill even a good speaker faster than a loud clean signal will. Stronger amps run more within their comfort zones and rarely strain for more than brief periods.

In no case should you ever try to do like Spinal Tap in their Mockumentary and turn the volume to '11'. ;-)

The HK's are fine. Speakers are a matter of (mostly) personal preference while amps running within their design limitation don't really sound different so go try out some speakers, see if they'll let you audition them at home and have some fun.

Posted on Apr 28, 2009

A Schneider

  • 185 Answers

SOURCE: convert to 220v krell amplifier ksa-250

if it is conertable to 120v there will be a tap on the transformer input for that

Posted on May 27, 2010

Lawrence Oravetz

  • 10543 Answers

SOURCE: Where I get a blown fuse on the left channel of my Krell KSA 300 amplifier

http://www.manualslib.com/manual/90296/Krell-Industries-Ksa-100s.html?page=18#manual Look on page 18

Posted on Sep 10, 2016

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1 Answer

Where can I get a fuse for my Krell KSA 300 amplifier.I had a blown fuse on the left channel.


Fuses rarely go on their own. The cause is likely to be a shorted semiconductor device in the left channel output.
Fuses are generally not specific to any brand. Is the fuse a tube with metal ends? If it is measure the length in MM. Then look at the end and you should see the rating. Either in A for Amps or MA for milliamps.
Any electronic parts supplier should have the one you want in stock. Buy several, for if the part I mentioned has gone, it will blow again.

Sep 09, 2016 | Krell Audio Players & Recorders

1 Answer

Hi, my Krell KSA 150amp is running cool any suggestions as to why. Many thanks


Audio output section circuit draws enormous current at idle stage. Contact any service electrician to detect the fault and get it repaired. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Mar 31, 2014 | Krell Audio Players & Recorders

1 Answer

When photcell turns off contactor vibrates and chatters. Everything rated and sized correctly


If the chattering goes on continuously until you remove power or cover the photo-cell, then your contactor (relay) is wired wrong. If that is the case, read on.... The relay is probably a double-throw relay, and it is wired in such a way that turning off the photo cell allows the relay to open, but when it opens, it closes on the other contacts, which are wired to re-energize the coil, causing it to close again. It is, in effect, bouncing off of the secondary contacts. This is exactly how buzzers and old phone ringers operate.
Good luck.

Nov 29, 2010 | Intermatic K1121 Photo Cell Control...

1 Answer

Hi, I have to replace all the 20 transistor of my krell kst-100 power amplifier- wich are the best choice? model and company? maybe mj21195g and 6 from onsemi?


Onsemi ( which is motorola) is a good pic for replacements If youre looking at the 21195 , then there must be a compliment to that as well? 21194 or 21196

Oct 10, 2010 | Krell KAV-300i 2-Channel Amplifier

1 Answer

Hi, sometimes while playing sound suddenly goes off. After cutting mains and restoring of mains, the amplifier starts working properly. I have checked cables and all. thanks


it is possible that you have eitherr a power realted issue or a protection circuit in acttion. First of all takeou the plugs and ccheck if there is corrosion in the pins, burn marks. If so clean them using a good emery paper,If so do not use the outlet that you are presently using. Otherwise If this seems OK, then you must check your speaker connections and check to find if the amp is over heating when it cuts off. Open the set top coverr and maek a good cleaning and tightening of the cords and boards while checking for burning smell. If you are able to access the main board, try to check for dry soldering bad joints in power and output cicuits. Use a good iron to do the resoldering and check again. If set is cutting off at high volume or high bass, then reduce load to confirm. If so you will have to check for distortion or wrong biasing in the output stages. Hope you check this out. Good day

Jul 18, 2010 | Krell KAV400Xi Amplifier

1 Answer

Channels out of balance - remote will only change left channel.


switch input cables and try this will confirm if the amp has a problem or the input signal

Jun 19, 2010 | Krell KAV400Xi Amplifier

1 Answer

Convert to 220v krell amplifier ksa-250


if it is conertable to 120v there will be a tap on the transformer input for that

May 13, 2010 | Audio Players & Recorders

1 Answer

Krell 250a power amp


Hi There WLAW,
I am in Auckland NZ and do repair work for a high quality Amplifier chain so I could have a look at yours for you....

Being Local in Auckland it will save you sending it away off shore to Australia.

Cheers From YUBEUT (09) 357 7496

Dec 26, 2007 | Krell Home Theater Standard 7.1...

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