Question about Amplifiers & Preamps

1 Answer

Hi Fi Speaker

I've tried different speakers and new cabling, but the problem persists. The speaker will be fine at first but after about an hour the sound on one side gets weaker until there is no sound at all,

It's always out of the same connectors on the amp.


Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 102 Answers
Re: Hi Fi Speaker

Might be your amp dying on you? Overheating and giving up in the end. Open it up and check the output stage. Depending on make/model it's using power modules or a few transistors per channel. The modules are little black boxes screwed onto a heatsink as are the transistors, only a bit smaller and usually two per channel. When one of the pairs feels warmer than the other the problem lies there. Best to bring it into a repair shop.

Posted on Jan 12, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

How to hook speakers up to a realistic mpa-40

The MPA-40 is a mono public address amp. So it has one speaker output. You select the appropriate socket to suite the speaker type. The 4/8/16 Ohm outs are for various tpyes of Hi-Fi speaker. The 70 Volt is used for muzak in shopping centres, restaurants, and waiting rooms.


If you have a pair of 8 ohm Hi-Fi speakers, you can diasy chain the connections and then use the Com and the 16 Ohm connection.

Daisy chain means you take the wires from a pair of speakers. Connect together the wires going to red on one speaker and black on the other. This now leaves you with two wires going to the other red and black terminals on the speakers, but the ends in your hand are not connected to anything yet. Plug the black in to COM. Plug the red in to 16 Ohm.

The sound from the speakers won't be stereo. It will be mono because that's all the amp outputs. But both speakers will work so long as they're functioning units.

If you have two 4 Ohm home theater speakers then you can do the same trick. 4 + 4 makes an 8 Ohm load. Connect the red to the 8 Ohm output.

Don't be tempted to try to connect to multiple terminals. The amp isn't powerful enough to to run more that one speaker chain.

Hope this helps

Sep 15, 2014 | Amplifiers & Preamps

1 Answer

Sound comes through only one speaker at a time.

Is the sound on both channels on a pair of headphones? If it is suspect a faulty headphone socket, especially if the speakers are cut out when the headphone jack is inserted - normally.

Jun 15, 2013 | Technics Amplifiers & Preamps

1 Answer

Main Speakers Loose Contact

pls. take out your speaker wires and cover the leads with soldering lead and connect it back.

Mar 16, 2013 | Amplifiers & Preamps

1 Answer

My samson servo 300's sound keeps cutting out, want to spray some electronic cleaner but not sure where ?

Yes; It maybe the protection coming on and off. This means there is a short in a speaker wire , or a blown speaker. The amp has 2 options for speaker hook up.1/4" plug and direct wire. If you are using direct wire it is possible to have frayed ends hanging around and can cause a short. You can test the speakers by unplugging them at the speaker, before you turn on the amp. Then turn it on, if the clicking still persist's turn off the amp and disconnect the speaker wires from the amp . Turn the amp back on. If the clicking still persists there is an internal problem with the amp. If not then you defiantly have either a wiring or speaker problem . You can test the speakers by using a 9v battery . Hook up the speaker wire to the speaker and put the battery on the other end of the wire, you should hear the speaker pop and see it move.If it moves it is still good. Note* this is also a good method of making sure your speakers are in phase. The battery is marked + & - the speaker will move forward when + is applied to the + of the speaker. make note of which wire is the +. if you get one speaker backwards it will cancel the sound of the bass. so hook the + to the red on the amp. Hope this helps you

Apr 26, 2012 | Samson Servo 300 2-Channel Amplifier

1 Answer

Hi I just got a Technics SU V2 amp and can't get sound from the speakers. What size speakers would suit this amp? What is the correct method to connect the speaker leads to the back of this amp,...

Being a 500W amplifier, you need to connect speakers with 300W each. The correct method to connect speakers is red terminal of speaker should be connected to red terminal of amplifier & black to black. The left side to left side speaker & right to right speaker. There may be main & remote terminals. Main speakers are the speakers at local place of the amplifier & remote for remotely placed speakers. I do have Technics SU-V85A which is somewhat similar. Enjoy! A nice piece to listen.

Oct 22, 2011 | Technics SUV500 2-Channel Amplifier

1 Answer

I have a Yamaha RX-V640 AV receiver. When I turn on the system, one of the rear speakers makes a hissing noise and system goes in standby mode automatically. I have tried changing the speaker and speaker...

the noise that you hear is a static, on the main circuit some components needed to be replaced. dont connect the speakers while you have this problem it can burn the speakers
if you want to fix the Amp let me know


Oct 12, 2010 | Yamaha Amplifiers & Preamps

1 Answer

Hi everyone, I am from New Delhi, India. I have purchased Technics 6 pcs hi fi system almost 16 year back. Its running fine upto now it has 2 main and 2 surround speakers. But it does'nt have center...


You cannot get 5.1 or 6.1 without an amplifier that is designed for it.

DVD will sound ok in your current set up but you wont get center center
( ie; 5.1)

Apr 14, 2010 | Technics Amplifiers & Preamps

1 Answer

New amp is whining

Try switching power amp output's to the speaker's and see if it still does it if it still does it the it's the speaker ,disconnect every thing from the input's of the power amp if it stop's start pluging thing's in one at a time ,process of elimination best of luck

Dec 27, 2008 | Amplifiers & Preamps

1 Answer

Center speaker hookup to a MARANTZ mdl 2238

Hi tliguyanadig

You can hook up the speaker "between" left and right outputs. Just connect the center speaker between left +ve and right +ve outputs respectively. It will give a spacial effect that some like and some dont:) Try it and see for yourself. Your marantz amp will handle the load OK. It is rated 38 watts into 8 ohms, but there is not alot of load presented by this sort of setup. Let me know what you think.


Apr 03, 2008 | Amplifiers & Preamps

1 Answer


Hi monmax,
I hope you are aware that in bridged mode your amp will become monaural (single channel, double power). If you still wish to bridge it:
Switch of power.
Set mode switch behind amp to "bridge" position.
Connect speaker positive to CH1+ve terminal of amp output and connect speaker negative to CH2 +ve terminal.
Be aware that now, in bridged mode your amps output power delivery is 1100 watts for a 4 ohm speaker and 900 watts for an 8 ohm speaker. Make sure your speaker can handle that.

Mar 03, 2008 | Crown CE1000 2-Channel Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

37 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts


Level 3 Expert

4518 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

66413 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides