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.


521 posts

Ultimate Geek
+1 received by user: 112

Trusted
Subscriber

Topic # 115089 13-Mar-2013 13:40
Send private message

I've just installed the Onkyo HTX22HDX (2.1) and was looking at doing 3.1 on the very very cheap.

This would involve cutting the RCA connector off of the centre speaker from a set of retired Logitech x-530's and wiring the speaker in. 

HTX22HDX states 6-16 ohm only on the back, Logitech says its speakers are 4 ohm (i'm guessing nominal?)

Would this kill the receiver?
Is there a way to increase the resistance of the speaker up to 6 or 8 ohms? Even if it's difficult, i'm looking at saving money, not time ;)

Many thanks.

Create new topic
Mad Scientist
18618 posts

Uber Geek
+1 received by user: 2365

Trusted
Lifetime subscriber

  Reply # 781104 13-Mar-2013 14:26
Send private message

it'll be fine.

just don't turn it up to anywhere near the absolute max on the dial

Mad Scientist
18618 posts

Uber Geek
+1 received by user: 2365

Trusted
Lifetime subscriber

  Reply # 781105 13-Mar-2013 14:30
Send private message

the onkyo does not know - ahh this is a Logitech speaker that is rated 4 ohm. my factory tells me I can't do it, it better blow up.

what the onkyo might do however is succumb to the laws of physics

V = I X R

V is 240V or whatever the internal transformer fixes it at

hence if the R goes down the I (current) will increase

the onkyo is made cheaply and is not intended to produce phenomenal amounts of current. however that only happens if you get drunk and dial led zeppelin to the max. if you use a 4Ohm speaker and listen at normal to high normal to quite high normal levels it will cope just fine.



521 posts

Ultimate Geek
+1 received by user: 112

Trusted
Subscriber

  Reply # 781294 13-Mar-2013 20:57
Send private message

Cheers for that. Sounds like a should work, but could do some harm.



521 posts

Ultimate Geek
+1 received by user: 112

Trusted
Subscriber

  Reply # 781303 13-Mar-2013 21:20
Send private message

Possible great success? http://www.parts-express.com/pe/showdetl.cfm?partnumber=019-015

Sorry no bbcode, typing on cellphone.

21235 posts

Uber Geek
+1 received by user: 4271

Trusted
Subscriber

  Reply # 782779 16-Mar-2013 21:22
Send private message

Will sound aweful and stress the amp even at lower levels.

Since its a class AB amp in home theater amps, they will dissapate more power for the same output levels, and it is worse at moderate levels than higher levels. Ohms law and all that. You will have to keep the levels so low that the total power dissapated by the amp is within its acceptable range that you will probably not even be louder than the tv speakers would be. It comes down to the amount of current the amp is designed to supply, and the rail voltages it has. Higher voltage rails will deliver more power into a lower ohm load, what doesnt get to the load will be put out as heat by the amp, currents will be way higher at the lower impedance.

Speakers like the logitech are equallized to hell and back on the amps they are supplied with. Anything else you hook it up to will be largly flat on the output and expose all the flaws in the speakers response that logitech corrected for in the amp.




Richard rich.ms

Mad Scientist
18618 posts

Uber Geek
+1 received by user: 2365

Trusted
Lifetime subscriber

  Reply # 782793 16-Mar-2013 22:28
Send private message

he says buy some cheap unwanted bookshelves on TM (not the junk that comes attached to "mini hifi all in one" systems)



521 posts

Ultimate Geek
+1 received by user: 112

Trusted
Subscriber

  Reply # 782796 16-Mar-2013 22:32
Send private message

All copied and understood, Many thanks for the advice. I'll be acquiring a single centre speaker, 3.1 is all I'm a wanting to create.

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 »

Microsoft Dynamics 365 Business Central launches
Posted 10-Jul-2018 10:40


Spark completes first milestone in voice platform upgrade
Posted 10-Jul-2018 09:36


Microsoft ices heated developers
Posted 6-Jul-2018 20:16


PB Technologies charged for its extended warranties and warned for bait advertising
Posted 3-Jul-2018 15:45


Almost 20,000 people claim credits from Spark
Posted 29-Jun-2018 10:40


Cove sells NZ's first insurance policy via chatbot
Posted 25-Jun-2018 10:04


N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08


Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03


Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27


Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13


Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00


Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12


Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52


Kogan.com to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34


Enable doubles fibre broadband speeds for its most popular wholesale service in Christchurch
Posted 2-Jun-2018 20:07



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.