[Mark Honey]


The specs on a Crown XLS-1000 indicate 8Ω Bridge @ 700W and 4Ω Bridge-Mono 1,100W.  In reading the XLS owners manual I don't see a setting for Bridged-Mono, just bridged.

 

I believe this means that since the Alpine SWS-15D4 has two 4 ohm voice coils, if I configure the XLS into bridged mode and wired the diagram shown to the left of the image below, the XLS would actually be putting out 4Ω into each voice coil and output could go up to 1,100W (even though the diagram shows 2Ω).  Wiring it using the diagram on the right would keep the AMP output to 8Ω and enable going up to 700W.

 

Since the Alpine has a Max Peak of 1,000W and 500W RMS, it seems like the better way to wire it is using the diagram to the left.

 

Is this the better way to wire it up?  Going to build a Lilwrecker (originally planned for an F-20).

 

 

 

[Mark Honey]


Bump.  This may seem elemental, but I am trying to confirm what I've been reading.

 

[saabracer23]

When you bridge the crown it becomes a mono output. If you want to bridge the amp your only option is to wire the coils in series to get and 8 ohm load to the amp. 700 watts should be very good for that driver.


Dan

 

[Mark Honey]


Thank you - I misunderstood the info I had found from Crutchfield:

 

"When the impedances of all the devices are the same, their total impedance, when wired in parallel, is that impedance value divided by the number of devices".  

 

I was originally thinking each speaker's ohm was added together, then divided by the number of voice coils, so in my original posting - 4Ω + 4Ω / 2 = 4Ω, but in reality it's 4Ω / 2 = 2Ω and if I had wired it in parallel as was my original intent with the XLS bridged - it would overdrive the XLS / causing a short life span, maybe something nasty the first time I powered it up.

 

This from the XLS data sheet also lead to my confusion re: Bridged and Bridged Mono

 



 

So I'd get the 1,100 W @ 4Ω if I had an 8Ω dual voice core subwoofer and wired that in parallel or some other combination that reduced the impedance of my 8Ω bridged XLS down to 4Ω.

 

Thank you for setting me straight.