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WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM

 
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flumoxed
Junior Contributor 10+


Joined: 30 Mar 2015
Posts: 17

PostPosted: Sun Aug 30, 2015 1:30 am    Post subject: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM Reply with quote

Hi, all.

I have searched the Forum but cannot find what I am looking for.
I need a clear scan of the KEF Q60 circuit diagram (.pdf file). Willing to pay reasonable sum via PayPal if necessary.

Many TX.
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John S
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Joined: 28 Apr 2008
Posts: 4
Location: Cheshire

PostPosted: Fri Oct 09, 2015 11:43 pm    Post subject: Reply with quote

PM sent
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flumoxed
Junior Contributor 10+


Joined: 30 Mar 2015
Posts: 17

PostPosted: Mon Oct 26, 2015 1:24 am    Post subject: WANTED: KEF Q60 (SP2189A) CIRCUIT DIAGRAM - PROJECT FINISHED Reply with quote

Somebody kindly sent me the circuit diagram and I have finished rebuilding the crossovers. The speakers sound surprisingly good. In case anyone is interested this is the route I took:

1. PCB:
https://www.intertechnik.com/Shop/Cross-over-parts/Circuit-boards/_LP05-INSELPLATTE_1768,en,12,47227

2. Mundorf ECaps and Mills MRA12 resistors:
http://www.hificollective.co.uk/

3. Bennic 1000 mfd Non-Polar Electrolytic Capacitor 100V
https://www.madisoundspeakerstore.com/electrolytic-cap-100vdc/bennic-1000-mfd-electrolytic-caps/

4. ALCAP 25 MFD 50V - > "Solen PB-MKP-FC 25 mfd
https://www.madisoundspeakerstore.com/solen-capacitors/solen-25-mfd-fast-cap-400v/

5. Inductor Coils: Salvaged the originals.

6. Cable inputs and outputs / bridges: Oyaide PC-OFCC 20 AWG

Comments:
1. Intended to use Solen PB-MKP-FC's for all caps except the Bennic 1000 mfd. They were too big for the PCB so I ended up using just the 25 mfd. Try Mundorf Ecaps for all caps except the Bennic 1000 mfd.

2. The vias in the checker-board PCB are 1.6 mm dia - instead of typical 0.7 mm dia. And the solder tabs may have been sprayed with lead-free solder. I used Ersin Multicore leaded solder but it pooled around the huge vias. Experiment with lead-free solder.

3. Attached heat clips to all parts when desoldering and soldering. When desoldering/soldering the wires to the speaker driver, be sure to wedge thin cardboard, etc, above the cone to catch any solder spatter.

4. Used rubber grommets between pcb legs and cabinet and screw heads and PCB.

5. All the parts suppliers were friendly and efficient. Hificollective shipping charges are very good / Madisound uses FedEx and charges are expensive.
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