Hello everyone. I own the amplifier in question. A few days ago I opened it for cleaning and since then I've been wondering if it might be worth updating it, perhaps in the power supply part by replacing the original 10000uF capacitors with others of greater capacity. This idea comes from the fact that I realized that with my Infinity KAPPA 8, by activating the switch that lowers the impedance of the woofers, the sound becomes richer in bass but it seems to me that it loses detail in the medium-high part, as if the amp was at its limit. Yet no protection LED lights up, nor does the cooling fan trigger any protection. What do you think? Other suggestions for possible improvement?
thank you
thank you
I'd measure before replace. These are well build amps and I wouldn't start fiddling with other part values in the PSU.
Higher capacitance will also put more strain on the rectifier's bridge due to a higher inrush current.
If it ain't broken, don't fix it. You will not have more bass from more Farads 🙂
If you don't have a ESR meter, you can measure them with a scope and function generator. If you have those, of course.
Excellent channel: https://www.youtube.com/@w2aew
Hugo
Higher capacitance will also put more strain on the rectifier's bridge due to a higher inrush current.
If it ain't broken, don't fix it. You will not have more bass from more Farads 🙂
If you don't have a ESR meter, you can measure them with a scope and function generator. If you have those, of course.
Excellent channel: https://www.youtube.com/@w2aew
Hugo
Thank you.
I think i shold discharge the capacitors with a properly resistor.
What do you think it shold be the properly value and watt ?
Fabio
I think i shold discharge the capacitors with a properly resistor.
What do you think it shold be the properly value and watt ?
Fabio
You definitely should discharge them. Careful, there is 75VDC across the caps. Measure after discharging.
Try 1K, 10Watt or so. Higher resistance will take more time. Lower will need a more powerful resistor.
Too low and you'll burn you fingers 🙂
Hugo
Try 1K, 10Watt or so. Higher resistance will take more time. Lower will need a more powerful resistor.
Too low and you'll burn you fingers 🙂
Hugo
470 to 2000 ohms. Use alligator clip leads and to not touch any part of the amp with 2 hands. >25 v across your heart can stop it. No jewelry on hands or wrists, 1v at high current can burn your flesh to charcoal. Unplug the amp from AC before testing.
My 70 w/ch amp produces great sound into 8 ohms with one 3300 uf capacitor for both channels. My amps don't go to 10000 uf per channel until the wattage out gets to 630. What wattage is this amp?
Detail IMHO has more to do with the speaker and room response than the amp. Have you measured response in your room? Do you have a microphone, a blue jack on the PC, and audacity or REW (free) software?
My 70 w/ch amp produces great sound into 8 ohms with one 3300 uf capacitor for both channels. My amps don't go to 10000 uf per channel until the wattage out gets to 630. What wattage is this amp?
Detail IMHO has more to do with the speaker and room response than the amp. Have you measured response in your room? Do you have a microphone, a blue jack on the PC, and audacity or REW (free) software?
