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These are amongst the easiest models to sound fit, theres slightly more space in the 21 pin model than the 8 pin one. Start by removing one screw from each end to remove the body For the 21 pin model we recommend the slimmest double iPhone speaker For the 8 pin model we recommend the 26x11x7 speaker Find the decoders and speakers here.

Quite a few people have already asked if my other class 33 fitting guide applies to the 'slim Jim' version, I wasn't sure so I ordered one to try. Start by prising off the body, its a very tight fit, and doesn't come off as easily as other class 33 models Its largely the same as fitting sound to the other class 33 models, but the model is now 21 pin. Theres space for a speaker on top of the pcb, it doesn't have to sit right at the end like it does on the recent 8 pin ones. There would also...

This is how we usually fit sound and a Megabass speaker to the HST. Start by removing the body. There are 4 screws and the back of the body lifts off first so it can be slid over the nose. The new 21 pin models come with a speaker at the back of the power car. This speaker is glued to the cab floor but can easily be prised off. Unsolder the wires and connect them to the new speaker. Cut the lugs off the speaker. Use either a cutting disk on a mini drill or use a pair of...

This guide shows how to fit sound to the Bachmann MPV. There are two possible ways to do it, one requires soldering, one doesn't In our opinion the best way to do it is to put the speaker under the model, this requires the speaker wires to be fed through and soldered onto the PCB.   Remove the 4 screws and unhook the coupling spring with tweezers to remove the cover.   The speaker can be held in place with black tack.   Feed the wires through the same slot that bachmann use for the other wires and solder them...

The Hornby 87 has surprisingly little space and its a model that people often ask about when they are fitting sound. Start by prising off the body, it has clips along the sides and comes off fairly easily. Take out the 2 screws holding the PCB so that you can get to underneath it. Even though Hornby provide space for a speaker at the opposite end to the socket, we dont recommend using it as its very restrictive, instead we use black tack to hold the speaker under the PCB, above the drive shaft, at the same end as the 8...