Are all four channels of Sony XM-504z same

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goldyrathore

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Joined 2002
#1
Hi,

Are all the four channels of Sony XM-504z same?
Its a four channel amp and and only two channels can be bridged. If all the channles are same then the other two channels can be used for bridging too (using some electronics).

I intend to driver two 4 ohm subs using it. Pls point me to schematics if available.

Thanks,
Goldy
 
#2
If the two channels that can be bridged are specified then the chances are it might have a higher current capability ( with more output transistors or larger power transistors ).
The other channels might not be able to do this. So before bridging those you better check out the power amp circuit on board . Visually might do if you can't get the circuit diagram ! See how many power devices there are on each channel and / or the device numbers.
 
#3
All channels are specified as 2 ohm

Hi Ashok,

The reason why I thought it was possible is that all the channels are specified to be 2 ohm stable. That could only be possible if they were identical. The manufacturer left out the bridging capability.

If anyone can point to the schematic, it would be clear.

Thanks,
Goldy
 
#6
Its a 4/3 channel amp. As per Sony all channels are 2 ohm stable with 50watts clean power each. They do support bridging 2 channels for sub use into a 4 ohm load. The other two cannot be bridged. My question was since all the channels ARE same cant the other two channels ALSO be used for bridging into another 4 ohm load. Only the input of one of those channels need to be reversed, all else being equal.

Here is what I got from sony(XM-504Z : Xplod Amplifier : In-Car Entertainment : Sony Philippines)
4/3 Channel Stereo Power Amplifier

MOSFET Power Supply & Output Stage
Maximum Output Power: 2 Ch x 125W + 1 Ch x 250W at 4ohm
Maximum Output Power: 4 Ch x 125W at 2 ohm
Maximum Output Power: 4 Ch x 100W at 4ohm
Rated Output Power: 2 Ch x 50W + 1 Ch x 120W at 4ohm (0.1% THD)
Rated Output Power: 4 Ch x 60W at 2 ohm (0.1% THD)
 
#7
You are correct. The web site I found did not give the correct specs.

I think the bridged channels can handle higher current than the nonbridged ones . (50 watts into 4 ohms and 120 watts into 4 ohms ) So you might just over load them if you bridged them ( the non bridgeable channel). Maybe even blow them !😱
However it would be interesting to look at the circuit diagram.
 
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