Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

RGP



24 posts

Geek


Topic # 111160 25-Oct-2012 22:32 Send private message

Hi - I am installing a sound system throughout the house for background music - doesn't need to be extra loud or of great quality . I have 5 of these speakers from Jaycar

http://www.jaycar.co.nz/productView.asp?ID=CS2445&form=CAT2&SUBCATID=1008#4

each with this volume control

http://www.jaycar.co.nz/productView.asp?ID=AC1685&keywords=attenuator&form=KEYWORD

connected in series. I am using an old Denon amp to drive them. It dosen't like it - it's getting hot!

What am I doing wrong?

thanks Ross 


Create new topic
1524 posts

Uber Geek
+1 received by user: 55


  Reply # 706660 26-Oct-2012 08:41 Send private message

Well if you have them wired in parallel and they are 8 ohm speakers then you are presenting your amp output with 1.6 ohms.
No wonder it's complaining. It's being somewhat stressed. If they are 4 ohm speakers the problem is even worse (0.8 ohms).
Can you supply some more info?

4740 posts

Uber Geek
+1 received by user: 117

Trusted

  Reply # 706666 26-Oct-2012 08:48 Send private message

Yeah the website doesn't list the 'ohm' rating for these speakers. With some careful configuration you could probably get even numbers of pairs to work ok, but yeah, it's not just as simple as connecting them all up.

RGP



24 posts

Geek


  Reply # 707082 26-Oct-2012 17:55 Send private message

Yes, I've connected them in parallel. No markings on the speaker as to what ohm they are rated at.
Thanks Ross

19 posts

Geek


  Reply # 707208 26-Oct-2012 21:54 Send private message

Your Denon amp, does it have A+B speakers?

RGP



24 posts

Geek


  Reply # 707221 26-Oct-2012 22:27 Send private message

no -its an old one, may need to upgrade

thanks Ross

2208 posts

Uber Geek
+1 received by user: 74

Subscriber

  Reply # 707227 26-Oct-2012 22:52 Send private message

Hang on, have you connected them in series, or in parallel?

Have a look at this YouTube video to get an idea on how to connect them in series.
That way you can match the speakers to your amp correctly (assuming your amp can drive the Jaycar cheapies).

19 posts

Geek


  Reply # 707241 26-Oct-2012 23:45 Send private message

Sorry, do you have 5 speakers (2x pairs +1) or, 5 pairs?
I assume it's 5 pairs since, you have 5 volume controllers?
And each pair goes from your amp, via a vol control, to the left and right of each pair?
And you've connected all the -lefts together, all the +lefts together, ditto for the rights and then connected them to the respective speaker terminals on the amp?

RGP



24 posts

Geek


  Reply # 707310 27-Oct-2012 09:15 Send private message

thanks Hidefinition - thats exactly how I've connected them although these speakers are stereo speakers ie each speaker has a left and right connection, so there are five speakers in total.

Hi Dunnersfella - connected in parallel - got it wrong in my original post. No link to youtube but will search for it

thanks guys

10933 posts

Uber Geek
+1 received by user: 467

Trusted
Subscriber

  Reply # 707807 28-Oct-2012 11:11 Send private message

you cant series them if you want individual volume control as they will all effect each other.

I just ended up getting several dirt cheap class T amps off ebay. 12V in and speaker out. google on bypassing the tone controls because they are crap. PC powersupply running 3 of them no worries.




Richard rich.ms

RGP



24 posts

Geek


  Reply # 711910 4-Nov-2012 21:20 Send private message

Thanks for your replies -the T amps look like the way to go if I was doing it again. Looks like I should have purchased these http://www.jaycar.co.nz/productView.asp?ID=AC1665&keywords=attenuator+volume&form=KEYWORD as they maintain a correct impedance match between amp and speaker - up to 8 speakers. Will see if Jaycar will take the ones I have back

cheers
Ross


Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:




News »

Trending now »
Hot discussions in our forums right now:

Does NZ need better gun laws?
Created by mattwnz, last reply by heylinb4nz on 2-Sep-2014 11:41 (96 replies)
Pages... 5 6 7


Warning: Rage Ahead - Campbell Live and childhood poverty
Created by kawaii, last reply by Dingbatt on 2-Sep-2014 11:47 (62 replies)
Pages... 3 4 5


Judith Collins: I am resigning
Created by Presso, last reply by gzt on 2-Sep-2014 11:42 (109 replies)
Pages... 6 7 8


Cirque du Soleil Cellphone Hijack
Created by myopinion, last reply by PhantomNVD on 1-Sep-2014 18:01 (21 replies)
Pages... 2


VideoEZY OnDemand
Created by Andib, last reply by nigelj on 2-Sep-2014 11:39 (41 replies)
Pages... 2 3


Orcon Global Mode launched
Created by freitasm, last reply by shk292 on 1-Sep-2014 11:32 (132 replies)
Pages... 7 8 9


Lightbox press event release
Created by freitasm, last reply by IcI on 30-Aug-2014 17:54 (562 replies)
Pages... 36 37 38


Lightbox quality comments
Created by ronw, last reply by freitasm on 2-Sep-2014 09:15 (101 replies)
Pages... 5 6 7



Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.