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DerAlte · 27th December 2007, 10:51

@rider60, we are in a bit of a bind here!

* Your sub is a 4 ohms DVC. If you parallel the coils (connect one of the sub + to the other +, and - to -), you will get effectively 2 ohms

* I couldn't find the manual for the XM-ZR602 anywhere on the net, nor of the TS-W307D4 subwoofer. If you have the manuals, please double-check what I have written below

* If one were to go by the manual for XM-554ZR and the XM-504Z, the Sony amps CANNOT take 2 ohms load in the bridged mode, because each channel would see 1 ohm effectively and THAT is a no-no in the Sony tech specs

* Your DVC sub is 400W nominal, which would mean it can take 200W per 4-ohms voice coil

* Since the max you can feed is 120 / 130W, your only recourse with this sub is to use one of the voice coils bridging the 2 channels

* For bridging the 2-channel amp, connect the + terminal of the sub (one of the coils) to the + of the left channel and - to the - of the right channel (please see http://download.css.ap.sony.com/cons...D%2b6Q%3d%3d#a Page 2 Connection Diagram 2)

Now, how it is currently connected is a mystery to me, since I have not seen the installation. In a lighter vein (with all due respect to the original installer), I wouldn't be surprised if the installer had connected one voice coil of the sub each to the left and right rear channels of the 4-ch amp

!

Navin-ji, should @rider60 leave the other voice coil open or should he short it? Maybe the Pio sub will behave better with one coil shorted!

Come to think of it, @rider60, we should "let the sleeping dogs lie": let the installation be as it is - unless you really feel something is wrong. At least you will not be provoking Murphy's laws.

27th December 2007, 10:51	#12 (permalink)
DerAlte Team-BHP Support Join Date: Mar 2007 Location: Bangalore Posts: 1,925	@rider60, we are in a bit of a bind here! * Your sub is a 4 ohms DVC. If you parallel the coils (connect one of the sub + to the other +, and - to -), you will get effectively 2 ohms * I couldn't find the manual for the XM-ZR602 anywhere on the net, nor of the TS-W307D4 subwoofer. If you have the manuals, please double-check what I have written below * If one were to go by the manual for XM-554ZR and the XM-504Z, the Sony amps CANNOT take 2 ohms load in the bridged mode, because each channel would see 1 ohm effectively and THAT is a no-no in the Sony tech specs * Your DVC sub is 400W nominal, which would mean it can take 200W per 4-ohms voice coil * Since the max you can feed is 120 / 130W, your only recourse with this sub is to use one of the voice coils bridging the 2 channels * For bridging the 2-channel amp, connect the + terminal of the sub (one of the coils) to the + of the left channel and - to the - of the right channel (please see http://download.css.ap.sony.com/cons...D%2b6Q%3d%3d#a Page 2 Connection Diagram 2) Now, how it is currently connected is a mystery to me, since I have not seen the installation. In a lighter vein (with all due respect to the original installer), I wouldn't be surprised if the installer had connected one voice coil of the sub each to the left and right rear channels of the 4-ch amp! Navin-ji, should @rider60 leave the other voice coil open or should he short it? Maybe the Pio sub will behave better with one coil shorted! Come to think of it, @rider60, we should "let the sleeping dogs lie": let the installation be as it is - unless you really feel something is wrong. At least you will not be provoking Murphy's laws. __________________ Never believe it cannot be done - it's only that you haven't found out how!!! Last edited by DerAlte : 27th December 2007 at 11:02.