Question about Krell KAV-300i 2-Channel Amplifier

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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?

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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

Posted on Oct 10, 2010

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How to find what is wrong with stereo amplifier that heats up but the transformer does not, and the fan doesn't go on, music was sporadic, now just not working?


Check for possible malfunction / heating of your amplifier power bank. Power transistor defective or leaky or else speaker terminal connections intermittent leading to disconnection of speaker load that heats up output power bank ( maybe power bank protection circuit if there not working )

Check the power bank and re-solder speaker connection / output terminals.Check for dry solders / loose connections in the power bank.

Run a thorough check on all solder leads !

Mar 23, 2015 | Audio Players & Recorders

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Additional detail about my AUREX STEREO AMP MODEL SB 130. I have change the rexridiwe / power diode but to no avail. This same result. The fuse rated 3.15 blown up 2 times. I wonder will is the cul


A module or an amp is doing a short cicuit. It's time to check if all transistors are valid. Be careful, bipolar and FET transistors behave differently. It can help to compare one by one each transistor from the RIGHT and LEFT amps. Good luck.

Mar 07, 2014 | Audio Players & Recorders

1 Answer

IN MY AKAI 20" COLOR


check your speakers if good, there are fusible resistors found at the power line of the amplifier section of the circuit maybe its open check also the transistors if good or bad if it is driven by an I. C maybe your I. C is busted replace I. C

Dec 22, 2010 | Akai 20" TV

1 Answer

Hello, after plugging on Ipod through my preamp hooked through my krell kav 300 integrated amp I heard a super loud noise and lost power. I examined the fuse and it looks fine. What do I do?


Sounds like the volume was way up when the iPod turned on. iPods are DC and cause a sudden thump through the speakers when they power on.
If the fuse is not blown, there may be another fuse you have not seen. Most amps have three to five fuses especially a 150watt/channel like the Krell.

Apr 17, 2010 | Krell KAV-300i 2-Channel Amplifier

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Hi, Will the krell kav 500i work on 220v 50hz supply? Thanks


If it has a voltage selector for 220v, once configured it will work just fine Being electronic instead of mechanical the power frequency won't affect it. If it doesn't have a voltage selctor, don't plug it into 220.

Dec 26, 2009 | Krell Audio Players & Recorders

2 Answers

Krell kav 250A blows internal fuse


hi please check the wiring of the output it could be short or the speaker would be short or it could be the diode at the secondary supply that had short or capacitor disconnect the power supply ans check the OHMS of the transformer .or check the transistor could be stort

Nov 17, 2009 | Audio Players & Recorders

1 Answer

Home theatre amplifier right speaker not working even with any other speakers.


I have 20 year exp. with Krell. Contact me directly.
Steven Leckrone
The Service Department
203-331-0671
sleckrone@snet.net

Oct 15, 2008 | Krell Home Theater Standard 7.1...

2 Answers

Krell kav300i, increasing volume by itself.


That is an extremely odd problem. I suggest finding a tech in your area who is familiar with the unit, or contacting krell directly.

Sep 21, 2008 | Krell KAV-300i 2-Channel Amplifier

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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