hi all
a while ago i found a site that sells toroid transformers that you simply install in your speaker cables in between the amp and speakers which makes the amp see a different load so even though your speakers may be 4ohm your amp will see a 8ohm load
i cant seem to find them any more on the net and am hoping some one here knows this product and the website where i can buy them
cheers
a while ago i found a site that sells toroid transformers that you simply install in your speaker cables in between the amp and speakers which makes the amp see a different load so even though your speakers may be 4ohm your amp will see a 8ohm load
i cant seem to find them any more on the net and am hoping some one here knows this product and the website where i can buy them
cheers
many thanks to jd and c37
that is exactly what i was after except for the price $700 for 2 toroids blaaah!
now how to diy ,they do not look to complicated hmmm 😀
that is exactly what i was after except for the price $700 for 2 toroids blaaah!
now how to diy ,they do not look to complicated hmmm 😀
I'm still sometimes a noob so correct me if I'm wrong, but isn't it possible to increase the impedence an amp sees by paralleling a resistor of sufficient watt-handling capacity with the speaker load?
is this for a class AB amp? don't waste your money... the only time something like this makes sense is with a tube amp or a SS amp with an output transformer, or a class A. you could easily "roll your own" anyway and save about $680.00.
the output impedance of most modern amps is well below 0.1 ohm, so using an impedance matching transformer doesn't make any sense. the device in question looks suspiciously like a standard toroid power transformer anyway, probably using the center tapped secondary as an autotransformer.
the output impedance of most modern amps is well below 0.1 ohm, so using an impedance matching transformer doesn't make any sense. the device in question looks suspiciously like a standard toroid power transformer anyway, probably using the center tapped secondary as an autotransformer.
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i am curious about this product as i am using aleph 2 se amps to drive esl speakers and am about to convert them to aleph j
with the aleph j amps the distortion into 4 ohm loads is higher than 8 ohm
they also dont double their power into 4 or 2 ohms so the above product would help a lot for my setup
cheers
with the aleph j amps the distortion into 4 ohm loads is higher than 8 ohm
they also dont double their power into 4 or 2 ohms so the above product would help a lot for my setup
cheers
EV, Altec and Rauland had EI-core matching transformers. As I recall the EV was called AT100 (for autotransformer 100W). E
that's a good use for it. you still won't double your power, but you will drive the 4 ohm load more efficiently... before you spend oodles of cash, might i recommend you at least try a 35-0-35 or a 24-0-24 power transformer secondary and see how well it works. being a power transformer it may or may not have high frequency loss, but if you have one laying around it's free, and being a toroid it might actually perform better at high frequencies than you would expect. i've seen toroids with similar construction (spiral wound steel laminate) used in very old (ca 1938) speaker crossovers, and they performed quite well, where E-I core inductors were very lossy for the same application.
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