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Sharp GF9000 replacement speakers?


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#1 Northerner

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Posted 05 December 2013 - 03:19 PM

Anyone got a recommendation for replacement speakers for the 9000?...preferably low cost.

They're 8 inch and 3.2 ohm I understand so I've been looking at 4 ohm ones but I'm no audiophile I've no clue really, just going crosseyed looking and I'm finding lots of bass ones but few full range ones.

Anyone got any low cost recommendations? :-)

#2 Northerner

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Posted 05 December 2013 - 03:28 PM

Would these be ok?

http://bit.ly/IuK986

#3 SpaceLobster

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Posted 05 December 2013 - 03:53 PM

Hey Northerner

I've been looking at the exact same thing and came across these: http://www.ebay.co.u...984.m1423.l2649

 

yours seem to be shallower though and a bit cheaper. Asked them and my suggestion was 4 inches deep. Think we need an expert opinion here  :yes: .

 

Peace



#4 Northerner

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Posted 05 December 2013 - 04:04 PM

Hi. Yeh they seem possibles as well, same seller too. Just need that expert opinion now :-)

#5 Beosystem10

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Posted 05 December 2013 - 04:29 PM

Would these be ok?

http://bit.ly/IuK986

At 93 decibels per watt at a metre they're certainly efficient enough for the limited output of a boombox amp. Price seems fair for what they are. I'd try them but then I'd try anything once.

 

Si, I don't think that you're at all shallow or cheap. And "expert" is a really offensive term as its literal meaning is a has-been with a small drip under pressure. Fortunately, there are specialists on this board, it's one of those you want. :cool: Or you could just do it, report your findings back here and become the specialist on putting custom speakers in a large Sharp. :yes:

 

The one in Space Lobster's link only gives you 89 decibels per watt at the same distance so may struggle to make enough noise with an AF amp that only provides - according to the manual I'm reading - 11 watts RMS per channel, meaning that at full blast it would be only slightly louder but potentially more distorted than the first one would be at a watt.


Edited by Beosystem10, 05 December 2013 - 04:34 PM.


#6 Northerner

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Posted 05 December 2013 - 04:42 PM

Lol I could live with shallow and cheap, I wouldn't argue with that ha ha ;)

I'll take a punt on those first ones then I'll report back with my expert opinion ;)

Thanks John :)

#7 Beosystem10

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Posted 05 December 2013 - 04:58 PM

'Tis a pleasure. I assume that the various dimensions are compatible with the available space? If these are a straighforward(ish) swap then you'd be making a brilliant box even better. :thumbsup:



#8 Northerner

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Posted 05 December 2013 - 05:11 PM

Just need to see if the seller will tell me the basket measurements to make sure they just slot in as they fit from the front. Should make a big difference sound wise according to those who've swapped them out before.

Biggest problem with this new 9000 is that its got a lot (and I mean a LOT) of emulsion paint spots on it so will take some cleaning :(

#9 Alberto

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Posted 05 December 2013 - 06:02 PM

A Simon, bklyn sound did a speaker replacement on a gf 777 with some Alpine drivers that were very affordable. here is the link. https://boomboxery.c...h-new-speakers/



#10 SpaceLobster

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Posted 12 December 2013 - 05:36 AM

Lol I could live with shallow and cheap, I wouldn't argue with that ha ha ;)

I'll take a punt on those first ones then I'll report back with my expert opinion ;)

Thanks John :)

 

Let me know if they really pound, I'll have to get me a pair as well  :yes: .

 

Peace



#11 Northerner

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Posted 12 December 2013 - 04:09 PM

Well I pick the 9000 up in a couple of weeks so I'll let you know how it goes :)

#12 riker1068

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Posted 15 September 2014 - 05:57 PM

how'd it go :-D



#13 Line Out

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Posted 19 October 2014 - 01:48 PM

The speakers at the first link would be kinda ideal. Those have high SPL and are used in "professional" audio cabinets. And 93dB SPL sounds very good. Only thing that is a bit mystery is how well those would produce bass frequencies... Frequency response is rated to start from 55Hz and that pretty high. But it wont necessary tell anything about the speakers ability to produce the lowest frequencies.

 

Though, being a "PA" -speaker, I would assume it's made for mid range and in a boombox it could have issues with the lows...

 

PS. That 55Hz looks like it is measured from a boxed speaker:

http://www.ebay.co.u...=item20c6fbd4c9

 

Something like this COULD also work 

http://www.ebay.co.u...=item258200565e

 

Hard to say any better, the description is quite simple. "Has straightforward tone with smooth highs and more predominant lows."

 

This -could- work with a higher power amp, because it has low SPL.

http://www.ebay.co.u...=item48682f3481

 

Also low SPL, but low Fs too, 45Hz.

http://www.ebay.co.u...=item43c654c7c1

 

Here's one with high SPL:

http://www.ebay.co.u...=item2c88c6d665

 

There are my few cents.



#14 Cpl-Chronic

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Posted 27 October 2014 - 02:20 AM

Take a close look at the placement of the transformer & other mounted parts/boards & their relative location to the speakers to get an idea of what space you really have.  You can pretty much guess-timate what space is available, then go speaker shopping. I had to move the transformer in both M90's I modded & 1 777 too.....The magnets were too big to fit with the original layout...

 

If the originals are 3.2 OHMS, I'm betting they are HAF's & can do 2 OHMS as long as the heatsinks & caps are beefy...

 

Cpl



#15 Line Out

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Posted 13 November 2014 - 10:25 PM

In some boxes the transformer is so close to the speaker that it makes it hum. This happens at least in my D8634... So there is a risk of humming if the replacement one comes closer than the original.



#16 Beosystem10

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Posted 14 November 2014 - 04:59 AM

In some boxes the transformer is so close to the speaker that it makes it hum. This happens at least in my D8634... So there is a risk of humming if the replacement one comes closer than the original.

 

That potential risk could be averted by replacing the TX with a capacitative dropper, which runs cold and takes up less room. I've only fitted such things to replace hot ceramic droppers in DC mains sets but they're perfectly suited to AC mains too. ;-)