i have a DJ amp 800W X1 (4 Ohm) (8 tr' of 2SC5198-2Sa1941)
in my amp dont have a fuse or protection...
i want to put a fuse for protection.... how much (A) fuse i needed for speaker out??
and how much (A) fuse i needed for power supply in my amp??
(48V AC 600VA)
in my amp dont have a fuse or protection...
i want to put a fuse for protection.... how much (A) fuse i needed for speaker out??
and how much (A) fuse i needed for power supply in my amp??
(48V AC 600VA)
Hi DJ
To calculate the correct speaker fuse value, we can use the equation P = I^2*R, which is rearranged to I = sqrt(P/R). Thus, a 800W 4 ohm speaker should draw an RMS current of about 14.1A. A 15-18A speaker line fuse would therefore be suitable.
For a symmetrical 48V supply with a 600VA transformer, ignoring any rectifier losses, a maximum current of about 6.25A per rail can be supplied. A 6.3A slow blow fuse in each rail would be about right - maybe a 10A if you experience any nuisance blowing. Make sure you place the fuse in the supply line _after_ the reservoir capacitors.
As a side note, the fact that your "800W" amp only has a 600VA transformer and absolutely no output protection, shows it is a poor design. Like I say, consider proper PA equipment next time. 🙄
Hope I've answered your query,
Tim.
To calculate the correct speaker fuse value, we can use the equation P = I^2*R, which is rearranged to I = sqrt(P/R). Thus, a 800W 4 ohm speaker should draw an RMS current of about 14.1A. A 15-18A speaker line fuse would therefore be suitable.
For a symmetrical 48V supply with a 600VA transformer, ignoring any rectifier losses, a maximum current of about 6.25A per rail can be supplied. A 6.3A slow blow fuse in each rail would be about right - maybe a 10A if you experience any nuisance blowing. Make sure you place the fuse in the supply line _after_ the reservoir capacitors.
As a side note, the fact that your "800W" amp only has a 600VA transformer and absolutely no output protection, shows it is a poor design. Like I say, consider proper PA equipment next time. 🙄
Hope I've answered your query,
Tim.
can i make him stronger....?
change the transformer to 50V AC 800VA
change the tr' (2SC5198-2SA1941) to 2SC5200-2SA1943
??
(i build this amp...)
change the transformer to 50V AC 800VA
change the tr' (2SC5198-2SA1941) to 2SC5200-2SA1943
??
(i build this amp...)
"can i make him stronger....?"
Not easily. The whole design must be considered, you cannot just increase the capacity of the transformer and change the output transistors. If you need more power I wouldn't waste time and money on this amp - try a different design.
Tim.
Not easily. The whole design must be considered, you cannot just increase the capacity of the transformer and change the output transistors. If you need more power I wouldn't waste time and money on this amp - try a different design.
Tim.
i have a lot of strongs Dj Amplifiers...
of GEMINI
and PYRAMID (bad amp) and NUMARK AMPS...
for my dj...
but i want to build a amp...
soo can i shange the part in my amp to make him stronger?
the money is not a problem...
of GEMINI
and PYRAMID (bad amp) and NUMARK AMPS...
for my dj...
but i want to build a amp...
soo can i shange the part in my amp to make him stronger?
the money is not a problem...
Member
Joined 2002
dj bass amp if you want raw nice out put power and you want tobuild it i would go witha pair of av800's from www.aussieamplifiers.com i ordered my boards and wow they look nice. it might cost ya a few pennies but hey youll have TONS of crisp clean and reliable power.
like me..: O )
like me..: O )
Generally "silicon fuses" blow faster than real fuses.
When the real fuses blow, it's often too late.
BTW: I'm not saying don't use them - just an observation!
When the real fuses blow, it's often too late.
BTW: I'm not saying don't use them - just an observation!
"soo can i shange the part in my amp to make him stronger?"
No. Not just the transformers and transistors. 😡
"but i want to build a amp..."
The "double barrelled" Leach amp would be a good choice, or maybe one of the designs from www.aussieamplifiers.com.
Tim.
No. Not just the transformers and transistors. 😡
"but i want to build a amp..."
The "double barrelled" Leach amp would be a good choice, or maybe one of the designs from www.aussieamplifiers.com.
Tim.
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