Lack of bass information if connecting with DX1
Dear all brothers,
Does anyone knowing the DX1?
As the title said when I connect the DX1 for the biamping system to the K2 s9500, it obviously much less of bass information than single amplifying system, I have even tried both transistor amp and tube amp but the result were the same. The present connection is Preamp -->DX1(main input) then HF(L,R)-->tube poweramp-->speaker (HF), then LF + (L,R)-->tube poweramp-->speaker (LF), LF - (L,R)-->no connection.
Best Regards,
Wrong Bass Card / maybe wrong HF card .
Hi,
Quote:
Originally Posted by ayyk
but I don't know what my card is, so I would like to upload a pic for you to indentify.
- I can see from here that the bass card ( the one on the right in your picture ) is not correct . It's missing a bunch of capacitors and also has a few resistors in the place of the expected capacitors .
- You need to take these cards into an electronics service center ( it doesn't have to be JBL ) & have them populate both cards with the correct resistors & capacitors ( before your DX-1 will work correctly with your S9500 ) .
- Have them use Polypropylene type capacitors ( not mylar ) .
- Print out the info that I posted and take it along to the electronics shop / they'll need it .
- It doesn't really matter which speaker system your cards are presently set for / they need to be changed ( & JBL no longer sells them / so we've been told ) .
Quote:
Originally Posted by ayyk
In addition to the last page of the sketch that I don't understand to the part on the lower right hand corner, is it a additional circuit to the cards or already exist on the main board?
- It looks to be a "recommended addendum" ( after-thought ) .
- It could be meant for the HF input of each speaker box ( therefore, you'd need 2 ).
- The (3.5 mH, 2.0 uF, 7.5 ohms ) is either an LCR notch filter centered at 1900 hz /or / a LCR impedance equalizer, centerd at the same frequency / ( what the LCR ultimately does depends on its' placement in the circuit ) .
- It wouldn't exist on the HF crossover cards .
- If it's strapped across the HF terminals outside of the speaker box it'll act as a frequency dependant impedance equalizer .
- If it's strapped across the drivers' terminals inside the speaker & after the passive crossover components / it'll notch out a few db of response in the 1900 hz area .
- I don't know which scenario is recommended ( 4313B might be able to find out ) .
>< cheers :)
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