Quad connections - How to

[Special K]

I am hoping someone here can help me with how to connect this all

 

Currently have a quad 33/303/tuner combo and trying to add the matching JR sub to it as well. 
 

The sub itself is passive and has a seperate external crossover with power amp on its own.  Which runs perfectly fine via a pre out on other amps. So non issue with the sub itself. 
 

Question is, how the heck do I connect it all and not blow anything trying to do so. 
 

Any suggestions or help with this would be appreciated. Thank you. 
 

 

[stereo coffee]

Hi Keith

You would connect from the 33 tape output which is the second Din socket  using pins 1 Left  and 4 Right and 2 as earth. From there connect a cable being 5 pin Din to RCA to the JR crossover input , and from JR crossover Ouput RCA  to the JR power amp input. Din.  How JR have allocated suggests as following DIN standards namely 1 and 4 as outputs and 3 and 5 as inputs  and 2 as earth for Din sockets. Follow either the markings for that numbering on the socket, or follow the allocation shown here:  As can be seen the numbering is not sequential for 1 and 4 and 3 and 5

 

You should be able to buy a pair of  5 pin Din to either 4 RCA or 2 RCA.  The connections then are your inputs to the 33 , then what is fixed output on Din 1 and 4 to the JR crossover using RCA ( not forgetting Pin 2 for earth ) and RCA from the crossover to Pin 3 and 5 of the Din socket going to the JR amp. Have volume at about 1/3rd on the JR amp to test , as it will set level via its volume control.

 

If you need volume just from the 33 it will be a matter of arranging wiring from the 33 ouput which is a 4 Pin Din socket ( I have a dozen or more in my spare parts so PM me for some ) to go to the 303 as well as the JR crossover - a hobby box will be best to split. The effort will be that you can adjust overall level still via the JR crossover , and your main volume control will be from the 33 

 

 

 

 

 

Edited August 29 by stereo coffee

[Special K]

16 minutes ago, stereo coffee said:

Hi Keith

You would connect from the 33 tape output which is the second Din socket  using pins 1 Left  and 4 Right and 2 as earth. From there connect a cable being 5 pin Din to RCA to the JR crossover input , and from JR crossover Ouput RCA  to the JR power amp input. Din.  How JR have allocated suggests as following DIN standards namely 1 and 4 as outputs and 3 and 5 as inputs  and 2 as earth for Din sockets. Follow either the markings for that numbering on the socket, or follow the allocation shown here:  As can be seen the numbering is not sequential for 1 and 4 and 3 and 5

 

You should be able to buy a pair of  5 pin Din to either 4 RCA or 2 RCA.  The connections then are your inputs to the 33 , then what is fixed output on Din 1 and 4 to the JR crossover using RCA ( not forgetting Pin 2 for earth ) and RCA from the crossover to Pin 3 and 5 of the Din socket going to the JR amp. Have volume at about 1/3rd on the JR amp to test , as it will set level via its volume control.

 

If you need volume just from the 33 it will be a matter of arranging wiring from the 33 ouput which is a 4 Pin Din socket ( I have a dozen or more in my spare parts so PM me for some ) to go to the 303 as well as the JR crossover - a hobby box will be best to split. The effort will be that you can adjust overall level still via the JR crossover , and your main volume control will be from the 33 

 

 

 

 

 

Hi Chris,

 

This is amazing stuff!!! Thank you so much!
 

21 minutes ago, stereo coffee said:

If you need volume just from the 33 it will be a matter of arranging wiring from the 33 ouput which is a 4 Pin Din socket ( I have a dozen or more in my spare parts so PM me for some ) to go to the 303 as well as the JR crossover - a hobby box will be best to split. The effort will be that you can adjust overall level still via the JR crossover , and your main volume control will be from the 33 

I do like this option. 
 

it sounds like doing this I can have the sub on and off and also adjust the crossover etc on the fly?
 

When you say “Hobby box” what exactly is that?

 

I have a few cables that came with this and should have some up my sleeve. But would be good to reach out if I needed something outside of that. 
 

 

 

[rundllexe]

49 minutes ago, stereo coffee said:

Hi Keith

You would connect from the 33 tape output which is the second Din socket  using pins 1 Left  and 4 Right and 2 as earth. From there connect a cable being 5 pin Din to RCA to the JR crossover input , and from JR crossover Ouput RCA  to the JR power amp input. Din.  How JR have allocated suggests as following DIN standards namely 1 and 4 as outputs and 3 and 5 as inputs  and 2 as earth for Din sockets. Follow either the markings for that numbering on the socket, or follow the allocation shown here:  As can be seen the numbering is not sequential for 1 and 4 and 3 and 5

 

You should be able to buy a pair of  5 pin Din to either 4 RCA or 2 RCA.  The connections then are your inputs to the 33 , then what is fixed output on Din 1 and 4 to the JR crossover using RCA ( not forgetting Pin 2 for earth ) and RCA from the crossover to Pin 3 and 5 of the Din socket going to the JR amp. Have volume at about 1/3rd on the JR amp to test , as it will set level via its volume control.

 

If you need volume just from the 33 it will be a matter of arranging wiring from the 33 ouput which is a 4 Pin Din socket ( I have a dozen or more in my spare parts so PM me for some ) to go to the 303 as well as the JR crossover - a hobby box will be best to split. The effort will be that you can adjust overall level still via the JR crossover , and your main volume control will be from the 33 

 

 

 

 

 

 

It sounds like your configuration ignores the high pass on the JR crossover, my experience with integrating subwoofers with my JRs is that the high pass is crucial for proper integration (subwoofers local proximity to the JR's, the JR's infact are sitting on top) due to the very slowly rolled off frequency below 100hz (F3 of 60hz and F4 of 50hz). Could a modification to your instructions be that the Output from the 33 to the 303 instead go via the JR crossover, with the Main Out from the JR going to the Input on the 303? This way volume is controlled through the 33 still and the high pass is being utilised avoiding any nulls & sums?

[stereo coffee]

A typical hobby box pictured with a cable gland fitting. Inside you have room to make connections to each cable and a tag board would enable those connections. from the 33 to the 303, and from the 33 to the JR crossover. By soldering to a tag board you avoid adding any more connectors than are required. A typical tag board pictured.  

[Special K]

31 minutes ago, stereo coffee said:

A typical hobby box pictured with a cable gland fitting. Inside you have room to make connections to each cable and a tag board would enable those connections. from the 33 to the 303, and from the 33 to the JR crossover. By soldering to a tag board you avoid adding any more connectors than are required. A typical tag board pictured.  

I am very much liking this idea. 
 

Not necessarily ideal for keeping the box count down, but the end result would allow to get the most out of the JR’s on their own and then add the sub as and when needed.  
 

 

[Special K]

1 hour ago, stereo coffee said:

The effort will be that you can adjust overall level still via the JR crossover , and your main volume control will be from the 33 

Can I ask then, using the hobby box I could only switch on the power for the sub crossover as and when needed?  
 

Would this have an impact on what @rundllexe stated in regards to the lows only been sent to the Sub at all times?  Assuming when the JR crossover is not switched on the JR’s would be doing both the highs and the lows?

[stereo coffee]

4 hours ago, Special K said:

Can I ask then, using the hobby box I could only switch on the power for the sub crossover as and when needed?  
 

Would this have an impact on what @rundllexe stated in regards to the lows only been sent to the Sub at all times?  Assuming when the JR crossover is not switched on the JR’s would be doing both the highs and the lows?

Yes all the control you need for frequency selection and  level applying to the sub - but originating at the 33 is at the JR crossover, and Yes you can if you wish arrange cabling to exit the JR crossover  - using a RCA to 4 pin Din , two options outlined below

 

Option 1, All pass  is 33 to hobby box Left Right and Gnd - you would use Pins 1 and 3 and 2 as gnd from the 33  ( noting unused DC voltage on Pin 4 ) see image  Output from Hobby box to 303 via 4 pin Din  and output from Hobby box to JR  crossover via RCA  - then exit JR crossover RCA to 5 pin 

 

Option 2  not requiring Hobby box  is 33 to JR crossover 4 pin Din to RCA  - these are sold as a cable look up Quad 33 to RCA , then RCA to 4 Pin Din - look up RCA to Quad 303 cable and RCA to 5 pin Din where the Din is arranged as a input

 

If your main speakers are say JR149 or other smaller speakers  then option 2 is logical as  @rundllexe advises you then have available high pass at the JR crossover and worked out by JR with correct values   , but if your main speakers are bass capable Option 1 might be worth exploring where you can at the Hobby box either full pass or arrange a high pass filter experimenting with capacitance values in series, to the 303    to get the best result with the speakers you use..  You can with either option discern correct subjective level via the JR crossover controls as well. 

 

 

[Special K]

On 30/08/2023 at 2:47 AM, stereo coffee said:

Option 2  not requiring Hobby box  is 33 to JR crossover 4 pin Din to RCA  - these are sold as a cable look up Quad 33 to RCA , then RCA to 4 Pin Din - look up RCA to Quad 303 cable and RCA to 5 pin Din where the Din is arranged as a input

 

Thanks Chris,

 

I feel like this maybe the option to go for now atleast.

 

Would be nice to have some cables made to match up, as it would be the next phase once I have it all complete. May as well start that journey now. 

 

The interesting thing is, I am pretty sure I had these cables, and they were taken apart and replaced when I had the gear serviced here in Melbourne.

[Special K]

On 30/08/2023 at 2:47 AM, stereo coffee said:

If your main speakers are say JR149 or other smaller speakers  then option 2 is logical as  @rundllexe advises you then have available high pass at the JR crossover and worked out by JR with correct values   , but if your main speakers are bass capable Option 1 might be worth exploring where you can at the Hobby box either full pass or arrange a high pass filter experimenting with capacitance values in series, to the 303    to get the best result with the speakers you use..  You can with either option discern correct subjective level via the JR crossover controls as well.

I have both the 149's and the 150's and hence would be great to let them shine on their own to get a true understanding of what they are capable of.  

 

I may reach out to @rundllexe as well if I can try and get a hobby box sorted out. Seems pretty easy enough to be built by a DIY enthusiast.