Technics SL12 and SL12-10

Not something I have much experience with but I was recently asked to help out servicing a neglected DJ classic. The first thing that strikes you when dismantling the deck is the solidity of the unit. The plastic is heavy, the metal is shiny everything just feels built to last. I just needed to sort … Read more

Cabinet Grille Cloth Repairs

If you look closely you can see the problem The cloth has disintegrated with either age, UV damage or both. The replacement Marshall “salt n pepper” cloth actually looks superior and should last a lot longer. The below Marshall cloth was damp damaged.  Replacement is very time consuming as getting the cloth pulled really tight … Read more

Orange

Orange amps are characterised by their distinctive colour, original sound, great build quality and over engineering that sets them apart and above their rivals.

Orange Bass Terror

The original bass terror in its small tin box with carry bag was an immediate success. Great sound and highly portable. It comes in 500w and 1000w variations and is pretty reliable.

Some issues that I have come across are:

  • Power supply dying, blowing fuses repeatedly usually suddenly. Fortunately repair is achievable and if not replacement modules from Orange are available.
  • Power amplifier burn out caused by overheating, overload or just bad luck.
  • Other faults are typical service things like valves, control pots and jacks.
  • Like all class D amps reliance on good fan airflow is essential so make sure to clean it out every couple of years or so.

Repair success is pretty good on these amps thanks to the excellent support from Orange.

To prevent damage to your OBT make sure you dismantle and vaccuum out all of the dust from the fan once in a while. Class-D amps rely on cool running to keep working any reduction in the cooling ability will cause the amp’s early demise.   

  1. Turn your amp of
  2. Use a paint brush to dislodge any engrained bits from the fan blades whilst using the vacuum to suck away the debris.
  3. Repeat every year or two. 

Dusty old OBT

Video showing power supplu startup proecdure following repair

 

Orange Rocker 30

These 30w, 1×12, dual gainy channel amps have very little to go wrong in them.  The only issues I have seen are from typical wear items like damaged pots, jacks and valves.

Amploft