i have a amplifier with 2 channels and 1 bridge
my amp transformer is 67V ~ 12.5A
and in my amp i have 8 transistors of 4 2SC5198 and 4 2SA1941
and my question is....
how much power of - Watt
i have in my amp into stereo (2,4,8 Ohm) ??
and how much power of bridge (4,8 Ohm) ??
my amp transformer is 67V ~ 12.5A
and in my amp i have 8 transistors of 4 2SC5198 and 4 2SA1941
and my question is....
how much power of - Watt
i have in my amp into stereo (2,4,8 Ohm) ??
and how much power of bridge (4,8 Ohm) ??
How about a pic of your amp?
One way to check the power is to connect a dummy load (like 8ohm, at least 200W resistor and drive the amp with sine wave untill the AC voltage on a load doesn't change. Then you can calculate the power P=U^2/R. My wild guess is that it may be around 200W or so. Does it make you happy?😉
Even if it is around 100W, the difference in subjective loudness is barely noticable.
One way to check the power is to connect a dummy load (like 8ohm, at least 200W resistor and drive the amp with sine wave untill the AC voltage on a load doesn't change. Then you can calculate the power P=U^2/R. My wild guess is that it may be around 200W or so. Does it make you happy?😉
Even if it is around 100W, the difference in subjective loudness is barely noticable.
Member
Joined 2002
thats a good idea. too but i was tought this. example if the amps consumes 400 watts at max power you devide that and if it is 2 channels you devide it again givin you this ..
400/2 200 and 2 channels 200 / 2 eq 100 wpc..
400/2 200 and 2 channels 200 / 2 eq 100 wpc..
they tell me the amp is 800W soo they lie to me 😱
Well, some DJ Amp manufacturers announce 1000W (p.m.p.o.)
They really HAVE 100W or less...
Check the box for something like pmpo near thw power output text.
p.m.p.o. means:
Peak Maximum Power Output
The amp can achieve that for 0,5 seconds or less...
Everybody agree with me??
Pedro Martins
Well, some DJ Amp manufacturers announce 1000W (p.m.p.o.)
They really HAVE 100W or less...
Check the box for something like pmpo near thw power output text.
p.m.p.o. means:
Peak Maximum Power Output
The amp can achieve that for 0,5 seconds or less...
Everybody agree with me??
Pedro Martins
1 Jason did NOT say the amp was 200W. I'm quoting:
"example if the amps consumes 400 watts at max power ..."
^^^^^^^
2 to Pedro: I don't agree, the value of a PMPO rating is probably much worse. Good reading on this topic from Rod Elliott: http://sound.westhost.com/power.htm
I once disassembled a pair of 80W PMPO PC speakers, containing a 24V/800mA transformer and a pair of TDA2030's (one per channel). This will NEVER output 80 W, not for a microsecond.
3 If an amplifier is not bridged, the max. sine wave power is limited by the power supply voltage as: V^2/(8*Rload).
Rectification of a 67V transformer gives about 93V. Given 3 volts of loss in the circuit, this yields about 125W in 8 ohms, 250W in 4 Ohms.
4 There is more to life than power alone. You seem to come up with a vague amplifier question once a week, refusing to give any information to the forum, and only being interested in power. Maybe you should take your time and try to understand what is happening in one amp before you jump to another one 🙂
5 If you want to produce decibels, speaker efficiency (large boxes, multiple drivers, horns) is the way to go. There is very little difference in spl, produced from an amplifier rated at 200W and 300W.
Think twice, mail once,
Dirk
"example if the amps consumes 400 watts at max power ..."
^^^^^^^
2 to Pedro: I don't agree, the value of a PMPO rating is probably much worse. Good reading on this topic from Rod Elliott: http://sound.westhost.com/power.htm
I once disassembled a pair of 80W PMPO PC speakers, containing a 24V/800mA transformer and a pair of TDA2030's (one per channel). This will NEVER output 80 W, not for a microsecond.
3 If an amplifier is not bridged, the max. sine wave power is limited by the power supply voltage as: V^2/(8*Rload).
Rectification of a 67V transformer gives about 93V. Given 3 volts of loss in the circuit, this yields about 125W in 8 ohms, 250W in 4 Ohms.
4 There is more to life than power alone. You seem to come up with a vague amplifier question once a week, refusing to give any information to the forum, and only being interested in power. Maybe you should take your time and try to understand what is happening in one amp before you jump to another one 🙂
5 If you want to produce decibels, speaker efficiency (large boxes, multiple drivers, horns) is the way to go. There is very little difference in spl, produced from an amplifier rated at 200W and 300W.
Think twice, mail once,
Dirk
Not that I know much about amp design, but...
DJ, From my experience in using and specifing/buying audio kit you can't just change one component and expect to get better results!
The whole amp will have been built to a price point set by the marketing department and costed by accounts, so it will have been built with the cheapest possible components, meaning that both the psu and the drive components , as well as any heatsinking, will not be up to coping with any more power dissipation.
Sorry...
DJ, From my experience in using and specifing/buying audio kit you can't just change one component and expect to get better results!
The whole amp will have been built to a price point set by the marketing department and costed by accounts, so it will have been built with the cheapest possible components, meaning that both the psu and the drive components , as well as any heatsinking, will not be up to coping with any more power dissipation.
Sorry...
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