Hi!
It's been a while .......and I have a question. I have the driver to a mirage SS-1000 that I want to use. The amplifier on it blew and there's no hope of fixing it. I ran a multimeter across the points on the SS-1000 driver and it came to 19 ohms and change? 😱. Finding an amp that will drive this thing like it's meant to be will be difficult i think. Would it be possible to "trick" whatever amp i end up using into seeing a different load? What I was thinking of doing is getting my hands on a 20 ohm resistor and running it parallel to the speaker. I understand this will divide the resistance between the two but I would have to find a resistor that would handle the wattage, correct? Anyone have any ideas other than that?
Thanks in advance.
It's been a while .......and I have a question. I have the driver to a mirage SS-1000 that I want to use. The amplifier on it blew and there's no hope of fixing it. I ran a multimeter across the points on the SS-1000 driver and it came to 19 ohms and change? 😱. Finding an amp that will drive this thing like it's meant to be will be difficult i think. Would it be possible to "trick" whatever amp i end up using into seeing a different load? What I was thinking of doing is getting my hands on a 20 ohm resistor and running it parallel to the speaker. I understand this will divide the resistance between the two but I would have to find a resistor that would handle the wattage, correct? Anyone have any ideas other than that?
Thanks in advance.
With that configuration, the driver will see exactly the same voltage from the driver and produce exactly the same output.
What sort of amplifier wattage are you looking for? For example, if you're looking for an amp that can drive 100W into the thing, look for an amp that can do 100*19/8 = 240W into 8 ohms. It will be capable of doing 100W into 19 ohms.
I'm looking for 400 watts RMS at the driver so I'd need an amp that pushes 1000 watts RMS at 8 ohms. Yikes. Got it. That's probably the route I'm going to go. But with the parallel wiring scheme it wouldn't divide the resistance between the speaker and the resistor raising the wattage output of the amp?
Maybe I have it wrong....(which I admittedly probably do)
If I have a monoblock amp that runs 100 watts at 8 ohms and hook up in parallel two 8 ohm speakers to the one channel the amp would be running at 4 ohms at 100 watts or 200 watts?
By the way thanks for the reply....been holding on to this driver for a looong time and finally deciding to do something with it.
Maybe I have it wrong....(which I admittedly probably do)
If I have a monoblock amp that runs 100 watts at 8 ohms and hook up in parallel two 8 ohm speakers to the one channel the amp would be running at 4 ohms at 100 watts or 200 watts?
By the way thanks for the reply....been holding on to this driver for a looong time and finally deciding to do something with it.
Yes, but ALL that extra output just gets absorbed by the resistor, none of it gets to the driver so you get no more SPL.
200w is what it should produce but because of cost cutting or other engineering decisions the 4ohm spec often comes up a little short of double the 8ohm spec.
Daem,
19 ohms DCR (dc resistance)would be highly unusual for a subwoofer driver, putting it into the 32ohm nominal range.
Are you certain the driver is not 1.9 ohms DCR?
Have you tested any other drivers as a "reality check" with the same meter?
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ok, now i get it. thanks guys. and yep, I've double checked the multimeter on other speakers and get accurate readings. Here's a pic of the ss-1000 driver terminals. There's some "extra thingies" at the terminals I don't understand that probably raise the
resistance.
resistance.
An externally hosted image should be here but it was not working when we last tested it.
That looks like it might be some sort of Zobel circuit, purpose being to flatten impedance at higher frequencies.
if you bypass the resistor/cap combo, what does the driver read?
sort of odd theyd use a 5w resistor on a "1000 watt" woofer
sort of odd theyd use a 5w resistor on a "1000 watt" woofer
It's not a 1000w driver. At least, not for any length of time. Simple vented pole-piece and no other way for the voice-coil to sink heat. Might be good for 500w long-term, although I'd expect a lot of power compression at those power levels.
I'd look for a pro amp and mod it for quiet fans. An EP2500 bridged would do well.
Chris
I'd look for a pro amp and mod it for quiet fans. An EP2500 bridged would do well.
Chris
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