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RickBlacker
Bronze Member
USA
138 Posts |
 Posted - 09/29/2009 : 05:04:54
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Getting conflicting suggestions from another board....
Basic Amp Info
quote:
Does it have two speakers? - if it does, the speakers were 8 ohms each wired in series for 16 ohms - unless someone has re-wired it.
If it has four speakers, then the net impedance is 8 ohms.
The output of the amplifier is 60 watts RMS at 8 ohms.
The minimum recommended speaker load is 8 ohms.
Suggesion 1
quote:
Yours came with Eminence 8 ohm speakers (you can see in your picture that they are wired in series.)
If you play loud, you would proably want to buy 16 ohm speakers and wire them in parallel. (I would go this route, and I would probably get Jensens.)
If not, then two 8 ohm speakers wired in series would be fine.
Suggestion 2
quote:
I also would suggest using Jensen speakers. The Eminence speakers you had a link to are only offered in 8 ohms. As you stated you want and need something that this amp can drive effertlessly at low output and the Jensen MOD speakers are ava. in either 8 or 16 ohms. I'd get the 16 ohms, wire them in parallel and you have a 8 ohm load to match the amp's output and since each speaker takes 50% of the rated 50 watts of power you can get speakers rated at 25 watts.
Don
My Question
What are the advantages and disadvantages of either? |
Edited by - RickBlacker on 09/29/2009 05:07:49 |
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DeFrag
Moderator
USA
3409 Posts |
Posted - 09/29/2009 : 05:30:56
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Are you talking about 2 speakers?
Do you have pictures of your speakers & wiring?
Here's one of the best sites describing impedances for many different configurations:
Shavano Speaker Wiring
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 09/29/2009 : 07:02:52
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Hi DeFrag...
I understand the wiring difference, I just wanted to know what was the benifit and negatives of both of those wiring types.
2 8ohm in series = 16 ohm load
2 16ohm in paralell = 8 ohm load
how much harder does an amp have to work on a 16ohm load over a 8 ohm load?
I found a sample Jensen MOD sound clip... I know it's hard to tell over the internet and what not, but.... Something just tells me that a $30 driver just can't sound all that great. |
Edited by - RickBlacker on 09/29/2009 07:05:55 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 09/29/2009 : 07:17:35
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If I've understood correctly, the amp output impedance is 8 Ohms. Assuming that's true, the load should be 8 Ohms for maximum power transfer. Period.
Ummm... it doesn't have two speakers because it is stereo does it?
Assuming mono...
Wiring speakers in parallel is "lower risk" - if one fails, you still have sound. If they are in series and one fails you are dead-in-the-water. Also, if you wire two 8 Ohm speakers in series you have a 16 Ohm load so aren't getting the most out of the amp.
Again, assuming the amp output impedance is 8 Ohms, I'd suggest wiring two 16 Ohm speakers in parallel.
Because SS amps can clip into square wave when overdriven, I'd also ensure the speakers are over-rated for power handling. Say 50W+ each? |
Edited by - Laurie on 09/29/2009 14:48:25 |
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DeFrag
Moderator
USA
3409 Posts |
Posted - 09/29/2009 : 08:59:16
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I concur with Laurie.
You'll wire them in parallel which provides an 8-ohm load & safety for your output transformer in case one goes tits up.
Solid-state amps are more forgiving than tube amps but the above case insures that you're driving the proper impedance load for maximum transfer & safety either way. |
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 09/29/2009 : 15:50:01
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Right now the amp is wired for a 16 ohm load... 2 10" drivers wired in series.
But yes, 8ohm amp. It was wired this way from the factory.
Do any of you know of any good 10" 16ohm drivers? I'm not sold on the Jensens that were suggested to me. |
Edited by - RickBlacker on 09/29/2009 16:38:33 |
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nosi0
Gold Member
Netherlands
511 Posts |
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 09/29/2009 : 23:32:37
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| I don't have a choice, I have to go with 10's, it's whats in the amp now. |
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RONanFEZ
Bronze Member
USA
85 Posts |
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 10/08/2009 : 01:00:40
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Well... I replaced ALL the 40 year old electrolytic caps (both preamps and power amp) with new caps, replaced the drivers with Eminence Ragin Cajun's.
DAYAM. Who would think a 40 year old solid state amp could growl like this... 2 channels, each channel has a low and high input. All 4 inputs have distinct tone characteristics. This is not a one trick pony.
I'd love to put this up against a line6 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 10/08/2009 : 01:35:56
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quote:
Originally posted by RickBlacker
replaced the drivers with Eminence Ragin Cajun's.
I've replaced the speakers in my Vibrolux Reverb reissue, and in my Peavey Classic 30 with Eminence speakers. Makes a huge difference.
Glad you have a cool amp now... another one saved from the back of the cupboard (or worse). |
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 10/08/2009 : 04:04:03
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quote:
Originally posted by Laurie
Glad you have a cool amp now... another one saved from the back of the cupboard (or worse).
I know and to think i wanted to sell it. |
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FRANZONI
Double Platinum Member
Ireland
3543 Posts |
Posted - 10/08/2009 : 19:45:29
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Congrats on the amp upgrade..i've heard good things about eminence ragin cajuns.... |
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Topic |
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What is the difference between this wiring.
