AS REQUESTED,  HAFLER  DH-200 RELAY SPEAKER PROTECTION MODULE WITH TURN ON DELAY.  DESIGNED AND HAND ASSEMBLED IN THE USA TO WORK WITH THE HAFLER DH-200 WITH PC-6 OR PC-1 DRIVER BOARDS. INCORPORATES TWO 20 AMP MINIMUM RATED RELAYS AND PTC FUSING IN A THIN MODULE PACKAGE. ONLY 6 WIRES TO SOLDER. CAN ALSO BE USED ON HAFLER 200 SERIES AMPS IN BRIDGED (MONO) MODE. MODULE IN INCHES MEASURES APPROXIMATELY 6 X 2 X 7/8 THICK. VISIT MY EBAY STORE FOR OTHER 200 SERIES SPEAKER PROTECTION MODULES OR AUDIO KITS.

The Speaker Protection Circuit has two main functions: to protect the audio amplifier and the loudspeakers during start-up sequence when the amplifier output might exhibit DC voltage, and to protect the loudspeakers in the unlikely event of an amplifier power stage failure, where DC component would damage the speaker. 

QUA-CO LLC ASSUMES NO RESPONSIBILITY FOR IMPROPER INSTALLATION CAUSING AMP OR SPEAKER FAILURE.  IF YOU ARE INTERESTED IN HAVING THIS UPGRADE INSTALLED PROFESSIONALLY BY A QUALIFIED ENGINEERING SERVICE, PLEASE EMAIL ME FOR CONTACT INFORMATION.

NOTE: ALLOW 3 FULL BUSINESS DAYS TO SHIP AS THESE ARE BUILT TO ORDER. CONTACT ME FOR SPECIAL REQUIREMENTS OR USE IN DYNACO, PHASE LINEAR OR OTHER MODELS. MODULE SHOWN INSTALLED IN A DH-200 WITH PC-1 DRIVER BOARD UPGRADE AND TESTED AT 10HZ 100 WATTS PER CHANNEL WITH NO FALSE TRIGGERING. THANKS FOR LOOKING.