If your resistors are equipped with the typical aluminium cooling coat and two fixing holes, I would recommend to srew them all on some aluminium sheet of 1..2mm thickness. Besides a better heat dissipation this gives some stability to your wiring.
Hey Volt, thanks for the advice. I have some zinc plates lying around.
However, the resistor concept is attractive if you have access to wholesale, but the wholesaler isn't responding to my order, even though I meet his minimal order.
Then, at retail price I return to the mad man's approach
: car audio speakers. Then you have a load that reacts like a speaker. Two x 4 ohm @ 150W RMS for Euro 30.
If I put them in series, can the ensemble handle more power?
However, the resistor concept is attractive if you have access to wholesale, but the wholesaler isn't responding to my order, even though I meet his minimal order.
Then, at retail price I return to the mad man's approach
: car audio speakers. Then you have a load that reacts like a speaker. Two x 4 ohm @ 150W RMS for Euro 30.If I put them in series, can the ensemble handle more power?
Say what?
You were right about my amp. It's a clone of the Ampeg Heritage SVT-CL. They didn't even bother to change the appearance.
So I have ordered a 600W 8ohm cabinet and a pair of 150W RMS 4 ohm car speakers. The latter go into a closet, in series, so they make 4 ohm in parallel with the cab. Any comments in Middle-English?
Thanks/regards
Guitarski
Obviously you like this idea using car speakers as a dummy load.
I do not, like many others here, for several reasons:
1) I do not believe any wattage numbers given with car speakers
2) Either I use a real speaker of appropriate power rating or a resistive dummy - but not some noisy BS in between.
3) I doubt there are no resistors fitting your needs on ebay at reasonable prize.
regards
voltwide
I do not, like many others here, for several reasons:
1) I do not believe any wattage numbers given with car speakers
2) Either I use a real speaker of appropriate power rating or a resistive dummy - but not some noisy BS in between.
3) I doubt there are no resistors fitting your needs on ebay at reasonable prize.
regards
voltwide
20th century Finnegan's Wake - just saying we're back at where we started.
As to comments, I rather feel the same way as voltwide seems to feel.
There have been some good suggestions in the thread. The speakers aren't one of them.
I had a friend who used his uni research grant to buy some wonderful Feastrex drivers. He had some quick-and-nasty box plans and asked me to design a better enclosure. More than a month later, after quite a few hours' work at perfecting the box design, I heard that he'd gone ahead and built the quick-and-nastys.
He seems to be quite happy with them. Ad Loudon Wainwright III sings in Red Guitar, God works in wondrous ways.
How can you be so sure? The speakers are two dummy loads for less than the price of one DIY resistor thing, at hardly any effort to set it up.
They will need to handle about 40% of the promised load. If they can't, I'm asking my money back.
I'm no theologist, but I'd say if God wants us to do one thing, it's learn. And that's what I've done in this thread, a lot! I'm sorry if you think we're back to square one, but I feel I have moved up a few squares. And then there is the
grand experiment, where Ampeg clone meets cheap car audio, that's the battle of the mutants. Don't say you're not excited!
Thanks/regards
Guitarski
Exactly my point, with both quotes. Theologise to taste.
Actually it feels a bit messy. But since it's not here/mine, it doesn't matter. I'd therefore be interested in hearing what the outcome was.
That's odd, that's how I felt about the lamps 🙂
I got one speaker into a lofi cab. The cab started walking, but the speaker seemed to hold its own. Tomorrow I will try to get the 2nd speaker in. Maybe the cab will start hopping.
Thanks/regards
Guitarski
Why didn't you say so before? When I was trying to work out a scheme with resistors I was wondering if the conductive bands (what are those?) on the print, that connect the various elements, can cope with 300W. Can they?
Those bulbs, by the way, look like halogens.
Clearly, anything that fits on a print will look neat, but since you are using halogens, that's like cheating (I wish I hadn't said that).
Regarding my walking cabs with cheap car audio: they act like natural attenuators. I connected them to a 50W guitar amp, set volume, drive and bass to max for the first time ever, because that will normally blow the roof off. On the dirty channel it sounded great, actually. I couldn't stop.
I was wondering, what idiot will put 150W RMS in his car? The answer is that these speakers absorb more power than they make noise. Ideal for me, but the real test will be the bass amp.
Thanks/regards
Guitarski
Those bulbs, by the way, look like halogens.
Clearly, anything that fits on a print will look neat, but since you are using halogens, that's like cheating (I wish I hadn't said that).
Regarding my walking cabs with cheap car audio: they act like natural attenuators. I connected them to a 50W guitar amp, set volume, drive and bass to max for the first time ever, because that will normally blow the roof off. On the dirty channel it sounded great, actually. I couldn't stop.
I was wondering, what idiot will put 150W RMS in his car? The answer is that these speakers absorb more power than they make noise. Ideal for me, but the real test will be the bass amp.
Thanks/regards
Guitarski
So now I'm cheating? ;-)
These work well here, but it's hard to say. It kind of depends on how much light and how much heat is made. Spread over a number of bulbs, nothing gets too hot, but one has to get the numbers right. And get lucky.
Valves frequently get soldered onto boards...
Sorry, still a bit creeped by wandering chipboard boxes making distorted sounds in a cupboard.
These work well here, but it's hard to say. It kind of depends on how much light and how much heat is made. Spread over a number of bulbs, nothing gets too hot, but one has to get the numbers right. And get lucky.
Valves frequently get soldered onto boards...
Sorry, still a bit creeped by wandering chipboard boxes making distorted sounds in a cupboard.
Check this out. The're Siamese twins now.
I tightened the screws in the back panel and now they stay put. It would have been the lambada otherwise.
If you can put both speakers in one cab, that's best, of course, but this way I didn't have to saw. Anyway, it's a load and it doesn't even sound bad.
Thanks/regards
Guitarski
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I tightened the screws in the back panel and now they stay put. It would have been the lambada otherwise.
If you can put both speakers in one cab, that's best, of course, but this way I didn't have to saw. Anyway, it's a load and it doesn't even sound bad.
Thanks/regards
Guitarski
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