Rather forlorn-looking woofer from a Technics organ with disintegrated foam surround. Cut away the old material before prepping for surround replacement: New surround interior-glued to the cone and wait for curing Support the edges of the cone and verify central placement (important to ensure the coil is free from dragging in the narrow gap – […]
8″ woofer foam rubber surround replacement Read More »
Customer mentions having previously lent out their KRK Rokit passive speakers, they came back ‘sounding awful’, and went for a service elsewhere, apparently there was ‘some rewiring done’, mentioned the crossover, and something had burnt out? All a bit vague. Opened up inside and couldn’t see anything immediately obvious with the crossover (didn’t look like
KRK Rokit sounding awful Read More »
Customer stated that they inadvertently connected the speaker output to a mixer rather than the line output, and claimed it stopped working, no longer any output. Quite how this catastrophic failure occurred as a result of connecting to a high impedance input, not sure! Clean some of the compound away to see the damage (obliteration
Brennan JB7 blown up! Read More »
Customer asked service of this really nice 10″ reel capable 7.5IPS stereo quarter track reel to reel with a handy reverse-play option! Back off first – a bit of dust removal to undertake! Front panel removed for access to mechanicals: Restored tape counter to aid visibility (black plastic faded): Some more photos prior to service:
Akai GX635D Reel to Reel service Read More »
Customer brought in a couple of Lux91 300B-based amps, one suddenly stopped working. First off noticed customer had inadvertently managed to remove and reinsert the 300B 4-pin valve rotated 90 degrees (as a ‘diy’ check swapping valves between units) prior to bringing to me which of course failed to fix anything. Thankfully nothing damaged being
Lux91 MonoMax monoblocks one dead Read More »
With the Cary 300SE Monobloc amp in the previous post, turned out the intermittent popping sound was one of the expensive 300B valves! Customer had already considered new valves, so with nothing to lose thought lets just check the connections and after extracting some solder from the pins, found this! One of the wires loose,
300B valve surgery Read More »
A friend reported intermittent issues with loud pops from one of speakers connected to his Cary 300SE monobloc setup. After some diagnosing swapping leads round to rule out the preamp, the issue stayed with one of the monoblocks. Suspected perhaps intermittent shorting of high voltage capacitor plates. Brought them over and found quite a number
Cary 300se Monoblock Amps Read More »
Customer states this unit was turned on after a period of non-use and apparently some electrical smell came out! Let’s have a look inside. There’s a pair of complementary MJ15003/MJ15004 output transistors, and oops some burned out resistors in the middle. One of them got so hot it had clearly melted the solder it was
Deltec / DPA 50S Amplifier – smoking hot! Read More »
