| khelben |
new to all this so hope im in the right spot
on the back of my crown amp it says " max input 750 watts"
does that mean i can run a line from the input to a speaker output on my yamaha receiver without "burning" the amp?
(the amp connects to a peavey 412s 4 ohm box |
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| Netlist |
Hi khelben,
I think you are mixing up a few things here.
I haven't got a clue what the Max input 750W could be.
The d150a has an output of 2 X 75W IIRC.
Connecting the input of the crown to the output of a receiver is not a good idea. (You will burn things).
Where are the Peavey's connected to? The Yamaha or the Crown?
/Hugo :) |
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| SY |
| That number is the power consumption from the wall socket. It doesn't relate to input sensitivity. You'll want to pad down the output of your receiver or, better yet, trace where the receiver power amp input is and connect that point to the Crown. |
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| khelben |
peavey> crown> ?need to connect to receiver
the receiver wont power the peavey by itself |
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| khelben |
| quote: | Originally posted by SY
That number is the power consumption from the wall socket. It doesn't relate to input sensitivity. You'll want to pad down the output of your receiver or, better yet, trace where the receiver power amp input is and connect that point to the Crown. |
pad down?how?
amp input/ from schematic of the receiver?solder in my own connection/mod ? |
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| SY |
You can use a couple of resistors per channel to form the pad. Without knowing anything about the Yamaha, I'd guess that you want something like a 10:1 reduction in voltage. The exact number is not critical. If that's not clear to you, best not start soldering.
The other thing you can do is use the tape monitor output of the Yamaha, then control the volume with the Crown's input attenuators. |
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| djk |
" max input 750 watts"
Power factor on cap input filter is about 0.6
Thus the watts available to consume about 450W
Amp will do 240W bridged at 8 ohms
Efficency is thus about 53%, about right for a class AB amplifier with an unregulated supply.
With a regulated supply the theoretical efficency of a class AB amplifier is 78.5% |
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| khelben |
ok, set up is <pc sound card- yamaha htr5240-main speakers-crown/peavey as sub>
the yamaha has a sub output that i cant get to work:bawling: |
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| Netlist |
The sub output will only work in surround mode, not in normal stereo mode methinks.
/Hugo :) |
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| khelben |
so how best , easy way to connect crown/peavey to system?
(yes noob here):cannotbe: |
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| Netlist |
| quote: | Originally posted by khelben
ok, set up is <pc sound card- yamaha htr5240-main speakers-crown/peavey as sub>
the yamaha has a sub output that i cant get to work:bawling: |
This setup is correct. Now
here's the complete manual, page 52 could provide the answer. Hope you have broadband.
Edit: Page 52 would be page 48.
/Hugo :) |
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| khelben |
have read this many times the last 2 days and nothing seems to work
thanks for the help but i think ill just get a bigger hammer:devilr:
this thing driving me nuts |
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| Netlist |
Are you sure the Crown is working when feeding the input(s)?
Are you sure the Peavey's work?
If they are, something must be wrong with the Yamaha.
You could connect the Crown to the Peavey's, connect the signal cable to the Crown's input and tip the RCA that normally goes to the Sub-out of the Yamaha with your fingers. If you hear hum it's the Yamaha. If not, it could as well be the interconnect.
/Hugo :) |
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| djk |
Giving an amp 'the finger' may blow it up.
Been there, had it happen. |
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| Netlist |
At moderate levels of course. :)
/Hugo |
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| khelben |
| anyone have a schematic of a yamaha htr-5240? |
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| Netlist |
Someone blew up an amp? :D :)
/Hugo |
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| khelben |
not yet
need to see where to solder in a connection before the amp in receiver to connect to the crown |
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| Netlist |
It really strikes me that you can't get sound from the sub-out.
Is this a new amp? Are the other outputs working?
And no, no schematic over here.
/Hugo :) |
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| khelben |
| peavy works , amp works all the other outputs on the reciever work but cant get anything out of the SW output |
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