20 Most Recent Teac A-H300 Amplifier Questions & Answers

Having looked at the TV, you will have a lot of problems trying to connect to that amp. The TV has a digital optical out output only. The disc player you mentioned will also be out only. You need a optical "in" for them both. The TV has no analogue out sockets. The only chance you might get any sound out is via the scart socket. If that is fully wired, then the scart might produce L&R analogue out. A scart plug with RCA connections (make certain it has both audio in and out) might produce some sound for the amp.
Otherwise no chance!

The amp you have was not made to work with digital signals. The TV will produce high quality Dolby 5.1 sounds. Assuming you get the scart to produce the sound, then you will only get stereo sound, little better than the TV itself!
I therefore recommend you get a decent digital amp that you connect all your future devices too. One that has HDMI connectors as well as at least two optical inputs.
Onkyo make some excellent models. For example this model would do the job Onkyo TXSR444 Home Cinema Receiver.

Teac A-H300... | Answered on Mar 04, 2016

Yes, it has an AUX input that will work fine for your phone.
Here is a link for the specs:


Teac A-H300... | Answered on Feb 09, 2015

Bulb is probably burnt out.

Teac A-H300... | Answered on Sep 04, 2014

I know this thread is a couple of years old, but this may help someone with the same problem.
There doesn't seem to be a supply of A-H300 transformers for direct replacement, but you can utilise the transformer from the MKII version of the amplifier with a little modification.
The output voltages from the MKII transformer are exactly the same, but two of the connectors have changed, so you will need to salvage these connectors from the original transformer to modify the MKII version.
The physical size is also a little different, but it will fit. I found that I had to remove the excess 'tags' that remain on the lower circuit board to give enough space for the transformer to align with two of the original mounting holes & I drilled one extra hole in the replacement tranformer baseplate so that a third screw could be used.
Hope this helps someone!

Teac A-H300... | Answered on Dec 02, 2013

hello where can you get one as i need one

Teac A-H300... | Answered on Dec 01, 2013

You will need some kind of power converter device, that changes the french power to that of the english one. Have a look on Amazon.

Teac A-H300... | Answered on Oct 28, 2013

There's only one way to check the transformer and that's with a voltmeter. If there is mains going in but nothing coming out of the secondary, then that fuse has gone. They are not designed to be replaced and Transformers are what the trade call 'Safety Parts'. So they have to be replaced with the same thing. I would contact Teac and find out if they still do make them or where you can get one from.

Teac A-H300... | Answered on Jun 29, 2013

Your amp has an output power of 50 Watts per channel into 4 Ohms speaker. It is designed to work with 4 Ohms speakers, and it will be best to slect 4Ohms impedence speakers to connect with this amp. Consider the Watts capacity of speaker too. It must be not less than 50Watts. In short, you have to select 4Ohms speakers, haveing more than 50Watts power handiling capacity. Remember, as Watt capacity of speaker increses, the cost will also increase considerably. OK.

Teac A-H300... | Answered on Jan 20, 2012

Yes to the first question. In the UK, they use the same power ratings, just different plugs (went there for my brother's wedding. Had to buy an adapter for my cell phone charger).

As for the tuner, they run on different frequency intervals there, but you should be able to pick up a few stations, since European and North American frequency intervals overlap at numerous points.

If you want to pick up all of the stations, check to see if this unit has an aux in, and run just a tuner head into this unit.

Hope that helps!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/cameron_463100ffd54b591d

Teac A-H300... | Answered on Feb 13, 2011

if a fuse blow there is a big chance that another fuse on the main circuit is blown also it should be on the protection unit.
need to take to service

Teac A-H300... | Answered on Oct 21, 2010

Do you have a manual?

If not you should be able to get one from the Teac site

Teac A-H300... | Answered on Aug 17, 2010

Just curious, what preceded this? Sudden spontaneous failure with no manual action associated? Is the Tape Monitor activated?

I don't know how valuable your speakers are but you're hitting them with max power and distortion when you get that bang. I'd use cheap headphones for the troubleshooting phase.

Teac A-H300... | Answered on Mar 03, 2010

Nothing beats actually trying it. At least you would have some form of volume control but you might not be able to match it to the wired speakers.

Or use any Line Level output, like Tape. Just don't select the corresponding Tape Monitor as it assumes a sound source coming IN from a Tape Deck. You won't have any volume control this way.

Teac A-H300... | Answered on Mar 03, 2010

If you still have the following voltages (0.3,44,0) and (-.1,-44,0) then the final stage is not turned on and you will only get low level sound. The driver +/or bias circuits are defective. Disconnect the center lead from each of the transistors and measure the 2 outer leads to ground,. Check the driver transistors for either an open or shorted condition and replace as necessary. Once the driver and bias circuits are working, the 2 outer leads should read +/- 0.5 and 0.

That should resolve the problem. Look for low valued resistors that are open.

Keep us posted.


Teac A-H300... | Answered on Mar 02, 2010

If the speaker relay does not activate, then the amp is in protect mode. There is a problem in that has been detected in the final stage of the amp. You indicate that you have 4V at the power transistors. That is likely the B+ voltage. What is the reading at the other 2 pins? Please post that and I should be able to give you some ideas.


Teac A-H300... | Answered on Feb 22, 2010

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