Question about Nakamichi PA-504 Car Audio Amplifier

1 Answer

I do not hear any music through my 10" M Audio Subs (M Audio Sound System)

Greetings from London UK. I got NAKAMICHI MB100 HU, powered by NAKAMICHI PA1004 Four Channel Amp which powers all the front door & rear Shelf Speakers and touch wood, still working fine without any problem. I do have a pair of 10" M Audio Sound System Subs which I've powered via another NAKAMICHI PA350 Four Channel Amp. Please note the M Audio Subs are dual coil each hence need 4 channel amps to power both. All were working fine until recently Subs is dead - could not hear any music BUT I do hear a hump on a timely interval, say within every minute (just Clicking noice such as BUG..... BUG). Any advice? I do not know whether the Amp is blown but I do get this Hump noice - which I believe the Amp is receiving power. Please help me as I'm going mad without the Subs. Thanks in advance.

Posted by Chand HArry on

  • Chand HArry Dec 08, 2007

    Well, I'm planning to upgrade my incar head unit by installing Nakamichi TP1200 etc. I need a nakamichi professional who could get the fitting job for me. I live in London nevertheless am prepared to travel to a reasonable distance to greet my nakamichi expert to get the job done. Please let me know if you know someone over here who is a true professional and love his job and not purely the charges. Thanks in advance.

  • Anonymous Mar 29, 2014

    One sub four channel amp

×

Ad

1 Answer

Hatters church organ

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 65 Answers

If you know how to use a multimeter, you can test the amp this way:

-unhook the subs
-hook up a cheapie speaker you know for sure works to one of the channels
-unhook the audio inputs
-turn the amp on
-set your meter to VDC
-put the positive probe on the inside of the input connector, being sure you make contact with th inner contact
-take the negative probe and tap it on the outside of the connector

What you are doing is sending a low voltage (replicating an audio signal) into the amp audio circuit and allowing the amp to amplify it. If the amp makes the speaker pop each time you strike the probe, the amp is working.

You mentioned you need a 4 channel amplifier make the two, dual voice coil subs operate. The is not true and by hooking them up like that, there's a chance of damaging the subs. The reason is that the dual voice coils are interwoven and they have to get electrically identical signals or they fight against each other. The can mechanically fail, then, electrically fail, then even damage the amp too.

Posted on Nov 22, 2007

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

What amplifier should I use for 2 650W Subs?


HI DUDE .. I JUST GIVE suggestions Boss Car Audio D5504 "Diablo Series" 4-Channel Car Amplifier 2200 Watts ITS REALY GOOD FOR SOUND SYSTEM DUDEaaf1faf.jpg

Jun 10, 2009 | Pioneer GM-6300F Car Audio Amplifier

2 Answers

Need to recone spker Tannoy super gold sgm10 b


I needed some speakers reconed. It ended up cheaper for me to just purchase new 10 inch woofers for my speakers. I actually purchased Rockford Subs for a car and placed them in my home speakers cabinets. It worked great.

Mar 31, 2009 | Music

1 Answer

No sound from subs


Have searched and searched and found out a few things about this HU. One question for you. Are you powering your subs through 1 amp and if so what amp is it??
Firstly the sub output only goes from 0 to -14 which isn't very loud.
Secondly, there is one write up of a guy that says, "Hi i also own a VM9312, and the way you make the sub louder is by turning it off. To do this, you go to settings, then go to audio, and turn the subwoofer OFF. This is really weird, but it worked for my unit."
Sounds strange but worth a go. And have you got the brake override working. If you need instructions and code give us a shout.
Sorry I can't help anymore at the moment.

Nov 19, 2008 | Car Audio & Video

1 Answer

Nakamichi TA-4A receiver no sound


HAI,AMP WORKS FINE , CONNACT ANY OTHER TO AMP(CD,DVD,COMPUTER,MOBILE,TV) IN BACKSIDE INAUDIO OR PRE_AMP .THEN SELECT  PLAYER TO IN MODE YOU HAVE INSAERTED.THE SOUND IS OK

Jun 26, 2008 | Nakamichi AV-10 Receiver

2 Answers

I have a Technic Cd player- SL-PG4- which has been working well until recently-npt very much used .Suddenly its Cd drive has ceased to open and the drive does not move in and out-though I can feel that...


Hi again, I have found a few Authorised Service guys about the place. My knowledge of London is poor :)

DIGITAL TONE LTD TRADING AS GALAXY REPAIRS&SPARES
26 tottenham court road
london
W1T 1BS
black_arrow.gif tel: 0207 580 1785
black_arrow.gif Email:[email protected]
black_arrow.gif web:www.digimart.eu7 miles

CAMERA CLINIC LTD
26 North End Crescent
West Kensington
London
W14 8TD

black_arrow.gif tel: 020 76027976
black_arrow.gif Email:[email protected]
black_arrow.gif web:www.cameraclinic.co.uk7 miles

TELEVIDEO SERVICES
705 Fulham Road
Fulham
London
SW6 5UL

black_arrow.gif tel: 02076106661
black_arrow.gif Email:[email protected]
black_arrow.gif web:http://www.avrepairs.co.uk9 miles

CAPITAL ELECTRONICS
98 Merton Road
Wandsworth
SW18 5SR

black_arrow.gif tel: 020 8874 0885
black_arrow.gif Email:[email protected]
9 miles

GEM TV LTD
220 High Road
Leytonstone
London
E11 3HU

black_arrow.gif tel: 020 8555 4422
black_arrow.gif Email:[email protected]
black_arrow.gif web:none
9 miles

ARMSTRONG HI-FI VIDEO SERVICES LTD
32A BLACKHORSE LANE
LONDON
E17 6HJ

black_arrow.gif tel: 0208 523 0023/0051
black_arrow.gif Email:[email protected]
10 miles

VIDEO PRINCE
UNIT 4, HORSESHOE CLOSE
OFF OXGATE LANE
LONDON
NW2 7JJ

black_arrow.gif tel: 020 84509842 / 6130
black_arrow.gif Email:[email protected]
black_arrow.gif web:www.videoprince.co.uk
10 miles

ATLANTIC ELECTRICS
970 NORTH CIRCULAR ROAD
LONDON
NW2 7JR

black_arrow.gif tel: 020 8208 6999
black_arrow.gif Email:[email protected]
black_arrow.gif web:www.atlantic2u.net
12 miles

TRADEFAYRE LTD
218 BURGES ROAD
LONDON
E6 2BS

black_arrow.gif tel: 020 8470 7526
black_arrow.gif Email:[email protected]
black_arrow.gif web:www.tradefayre.com
12 miles

DK AUDIO VISUAL SERVICES (LONDON) LTD
189 - 191 London Road
Mitcham
CR4 2JB

black_arrow.gif tel: 0870 420 4006
black_arrow.gif Email:[email protected]
black_arrow.gif web:http//:www.dkavs.co.uk

Hope this info gets the problem sorted for you. Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek

May 27, 2008 | Audio Players & Recorders

2 Answers

MB-100


Where about are you? I'm in London UK and do have MB100 HU in my car. I could get you the manual photo copied for you. Let me know and we will take it from there. Chandru

Dec 21, 2007 | Nakamichi MB-100 6-Disc CD Changer

1 Answer

Stop putting out sound to subs


Ok This is a two channel High Current amp. It is stable to one ohm. If the Subs are single voice coil at two ohms the they have to be wired in Parallel that means (Red +) (Black -) are connected to the + and - of another sub and then the (RED +) (Black -) from both go to one output channel of the amp. You pair the other two in the same fashion on the other output channel. If you are getting no output (sound) at all first check if the amplifier is going into protect. (Usually indicated by a red led on the unit. If it is connect only one Sub to each output and see if the protect LED goes out. If it does then you should have sound at the subs. If not check that you have the sub output enabled on the HU some head units do not come with the sub output enabled on the HU. If every thig is enabled, with only one sub connected to each output and the protect LED is not on then your amp is probably blown and needs repair. Nice thing is that MA has a great warrenty policy. Check and make sure the protect LED is off. If it is on you probably have the SUBS wired wrong

Jun 23, 2007 | MA Audio HK802SX Car Audio Amplifier

1 Answer

Car amp's stopped working. Putting out a heart beat sound through subs but no bass.


could be low current ,disconnect all power including ground for 20min N.B most amps will seem to be shorted at output but this is normal due to damping ratio.

Jun 11, 2007 | Jl Audio E1200 Car Audio Amplifier

Not finding what you are looking for?
Nakamichi PA-504 Car Audio Amplifier Logo

400 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nakamichi Car Audio & Video Experts

The Knight
The Knight

Level 3 Expert

76407 Answers

Tom Chichester

Level 3 Expert

55675 Answers

Michael Ponzio
Michael Ponzio

Level 2 Expert

90 Answers

Are you a Nakamichi Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...