Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[duggs]

I don't understand speakers too well but i have a question for those that do please.

I picked up some nice, quality Panasonic speakers to day in a sale. Technically the sort that "attach" to a TV suround sound DVD player etc.

Can I wire them into my Sony Xplod for the rear shelf and what are the potential dangers of doing so. At the moment they are wired into my PC's Soundblaster X-Fi sound card and they seem happy but I was thinking of wiring in another set to my car.

Any thoughts or advice please.

The Xpold has a 45 watt output I believe and the Panasonic's are 120 watt.

Sure it's an elementory question but I don't know....Do I run the risk of something going bang if I try to use them in the car. ?? :-/

[Stallion]

What size are they??  :-?

[Stallion]

TBO the original speakers are quite good compared to some higher powered speakers out there, yes they might be low wattage, but very capable! 

[Dave DND]

The Sony will only run 4 Ohm speakers, and has one of the most fragile audio circuits of any car stereo.

Very easy to blow it if you connect anything that was never designed to be connected.

I think TV speakers were 16 ohm ?

[duggs]

oooooooo....so running 16ohm speakers from a 4 ohm source is a receipe for disaster then.

[Martian]

oooooooo....so running 16ohm speakers from a 4 ohm source is a receipe for disaster then.

Depends on how hard you push it, but the amp will certainly struggle to drive a 16[ch937] load if it is expecting to see one quarter of that.

[Dave DND]

oooooooo....so running 16ohm speakers from a 4 ohm source is a receipe for disaster then.

Yep ! 

Stick to car speakers !!

 

[tango]

i dont think the amp will be affected
car stereos are normally designed to run at 4 ohms
if you connect a load of more than 4ohms ie 16 ohms
it just means that you are not using the amp at its full potential
so the car stereo will only be putting out alot less than 45watts
its kind of defeating the obeject really

[Dave DND]

i dont think the amp will be affected
car stereos are normally designed to run at 4 ohms
if you connect a load of more than 4ohms ie 16 ohms
it just means that you are not using the amp at its full potential
so the car stereo will only be putting out alot less than 45watts
its kind of defeating the obeject really

You are missing the point !!
Whilst what you say would certainly be the case with most car stereos, Sony units are constructed in such a way that anything out of tolerance will result in the imminant destruction of the internal audio circuits. They are simply not built as robustly as other brands.

4 Ohm Car speakers ONLY !!

[zirk]

The TV / Surround Speakers should be 8 ohms, so its going to be -3db or around half the power from a 4 ohm source. 
 
In the real world of loudness through, I would have thought that modern Car Audio speakers would have a much better input sensitivity rating than that for TV audio so your probably going to lose a few more db's in that respect.
 
As previously said, stick with the Car Audio stuff.

[Martian]

i dont think the amp will be affected

You are obviously not "au fait" with impedance matching, and it's effects when you choose to ignore what the manufacturer says their equipment needs to see.

[Dave DND]

i dont think the amp will be affected

You are obviously not "au fait" with impedance matching, and it's effects when you choose to ignore what the manufacturer says their equipment needs to see.

[tango]

i dont think the amp will be affected

You are obviously not "au fait" with impedance matching, and it's effects when you choose to ignore what the manufacturer says their equipment needs to see.

not being funny but ive been doing car audio installs for many years
ive got a trophy from db drag to prove i aint no rookie
neither am i questioning the advice given by some members here, as theres a lot of people here with a lot of good knowledge
but when it comes to car audio i do think i know what im talkin about
and coming back to the point if the panasonic speakers are rated at 16ohms then i would again say connect them i will guarantee you will not blow either the stereo ic nor the speakers
the ic are designed to run speakers at 4ohm and not less
nothing stops you from connecting a higher impediance speaker the ic just wont work at its full potential

[Dave DND]

connect them i will guarantee you will not blow either the stereo ic nor the speakers

Tango,
Whilst I do not question your knowledge of impedance matching at competition level, (incidentally, you probably recognise our name as actually holding many of the competitions and handing out the trophies!) the point I am making here, is that at grass roots level, probably something you haven`t messed with for a while, the Sony units are simply too fickle for a non-4 ohm impedance, even a higher one as it unbalances the output stage. I can`t think of anyone in the car audio circuit using Sony head units at the moment, and this is for good reason - they blow far too easily.

Yes, other brands can be played around with with different impedances giving various results, but doing this with a Sony will only end in tears - if you have any experience with the audio IC`s that Sony are currently using, then you will immediately see the problem. They also blow very quickly when connected to Yank cars runing 8 Ohms for exactly the same reason - its the wrong impedance ! They are designed to run at 4 Ohms only.

 

[Martian]

the ic are designed to run speakers at 4ohm and not less
nothing stops you from connecting a higher impediance speaker the ic just wont work at its full potential

The IC won't work at it's full potential because it's being held back by the load it is presented with, however the IC won't know this and will try it's best to deliver the full volume the end user is requesting.

This causes the IC to work harder, which in turn increases it's temperature, which in turn makes it pull more current, which makes it get hotter still, etc, etc, etc.

As Dave has already stated, Sony are using IC's that offer sod all in the way of self protection so connecting anything other than the recommended load is playing with fire.