Speaker replacements.
- Thread starter elcanto73
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Years ago, I replaced the stock speakers in a JVC PC-55 with some Diamond Audio D151 component speakers, and I filled the speaker boxes with some polyfill batting. The difference in sound was mindblowing. Speakers on a boombox, generally, are the weakest link in the sound chain. I would imagine there are some boomboxes where one would be hard pressed to actually improve (instead of just changing) the sound.
Car or home choice does not really matter in my opinion. Staying with the same ohm rating is considered by many to be the safest way, but going with a lower ohm rating can work too. Member Cpl Chronic went from 6 ohm down to 2 ohm (Infinity car speakers) in a Sharp GF-777 and seemed to have good results. The main thing is to not go to a higher ohm rating. Doing so will make the amp work harder and will more than likely blow the amp after a while.
Also, I would suggest looking for speakers with the highest sensitivity rating. Moving more air using less power is a good thing.
Car or home choice does not really matter in my opinion. Staying with the same ohm rating is considered by many to be the safest way, but going with a lower ohm rating can work too. Member Cpl Chronic went from 6 ohm down to 2 ohm (Infinity car speakers) in a Sharp GF-777 and seemed to have good results. The main thing is to not go to a higher ohm rating. Doing so will make the amp work harder and will more than likely blow the amp after a while.
Also, I would suggest looking for speakers with the highest sensitivity rating. Moving more air using less power is a good thing.
I'm replacing the speakers on my triple 7 and even though the speakers say 4ohm I got a higher reading. But didn't know if it would make a big difference in car or home speakers. But since you mentioned what the other member did to his i kinda have a good idea what I want to do. Thanks for your info big homie
Reli
Boomus Fidelis
Actually, lower Ohm speakers make the amp work harder. Higher Ohm speakers are more restrictive and don't allow the amp to send as much power.
You can try lower Ohm speakers in an attempt to get more volume/bass, but it's possible that you will overwork the amp if you regularly push it. It's best to look up the amp code on Google and see what the manufacturer recommends. I believe the GF-777 uses Hitachi HA1392 amps.
It's hard to find speakers below 4 ohms anyway, so I would just stick with 4 ohms. That would give you more choices and prices to choose from.
You can try lower Ohm speakers in an attempt to get more volume/bass, but it's possible that you will overwork the amp if you regularly push it. It's best to look up the amp code on Google and see what the manufacturer recommends. I believe the GF-777 uses Hitachi HA1392 amps.
It's hard to find speakers below 4 ohms anyway, so I would just stick with 4 ohms. That would give you more choices and prices to choose from.
floyd
Boomus Fidelis
I agree, the 4 ohm speakers work best and you can use coaxial for the outer speakers and a true subwoofer for the super woofers, these things will literally walk across the floor with the right speakers.
Well, I'm embarrassed now. I knew that lower ohm speakers could damage the amp, but for wrong reasons. Reli, thanks for making me question my sanity enough to go read. I found this informative discussion over at Audiogon
Reli
Boomus Fidelis
Most of that was over my head LOL, but this part is kind of what I was getting at:
"A 90 db/1 watt/1 meter/4 ohm speaker will require a lower setting of the volume control to produce the same volume as a 90 db/1 watt/1 meter/8 ohm speaker."...…..but the former will demand more current from the amp.
hopey
Member (SA)
Let me add my 2 bobs worth. I have had this conversation before on the forum and its a polarising topic.
Don't confuse Power Output with Music Power. Power Output is the how much the amp chips can produce. The Music Power is how well the speakers convert the Power Output into sound.
I have experimented with changing the speakers from 8 ohm to 4 ohm you can try it for yourself. When using the 8 ohm drivers the volume can be turned up to full volume and you have achieved full Power Output. In contrast when using 4 ohm speakers it will appear to be louder but in actual fact Full Power Output is achieved at half volume. If you go past half volume you run the risk of damaging the amp chips as it cannot regulate the output voltage (as the current output is limited by the amp chip voltage is pushed beyond limitations) . Check out Ohms law.
In regards to Music Power this can be improved by using high sensitivity speakers, the problem being the original speakers would have a limited frequency range but do have around 95% sensitivity. If you check out say car audio you'll be hard pressed to find a speaker this good.
My advice is to use the same ohm rating speaker (the amp circuit has been design for) but find one that is 90 or above on sensitivity rating. If the supplier does not state the sensitivity rating then it is most probably rubbish.
Don't confuse Power Output with Music Power. Power Output is the how much the amp chips can produce. The Music Power is how well the speakers convert the Power Output into sound.
I have experimented with changing the speakers from 8 ohm to 4 ohm you can try it for yourself. When using the 8 ohm drivers the volume can be turned up to full volume and you have achieved full Power Output. In contrast when using 4 ohm speakers it will appear to be louder but in actual fact Full Power Output is achieved at half volume. If you go past half volume you run the risk of damaging the amp chips as it cannot regulate the output voltage (as the current output is limited by the amp chip voltage is pushed beyond limitations) . Check out Ohms law.
In regards to Music Power this can be improved by using high sensitivity speakers, the problem being the original speakers would have a limited frequency range but do have around 95% sensitivity. If you check out say car audio you'll be hard pressed to find a speaker this good.
My advice is to use the same ohm rating speaker (the amp circuit has been design for) but find one that is 90 or above on sensitivity rating. If the supplier does not state the sensitivity rating then it is most probably rubbish.
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atarijen
Member (SA)
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