hardwired91
pfm Member
I have checked its not there either, it's not behind any of the units wierd I thought they was easy to get to
Does anyone have a circuit diagram for the crossovers in my Studio 4s please?
Thanks.
I had a pair of the AOS Studio 100 XL which are a large 3-way design using a 240mm ATC woofer and Scanspeak mid and tweeter. Fabulous speakers.I think you're referring to the RTL 3 - Which appears to be the most widely sold late TDL Electronics design (probably accounts for half of the proper, pre - Richer-Sounds TDLs you see on fleabay), but this was by no means the only model they were selling at this stage. The RTL range were at a lower price point, & were not a transmission line design, despite the name, and ran in parallel with the Monitor and Studio ranges. Some had dual bass drivers, as you described (RTL 3 and 4, the later T-Line 3) Some didn't. (RTL 1 & 2, and then the T-Line 2 had a single LF driver below the HF)
The Studio 3 also had this arrangement (2 LF drivers above and below the HF) but the Studio 1 & 2 (2 drivers, LF above HF) and 4 (3-way featured in this thread) did not. The 4-way Monitor, Studio 2 and 3 were eventually dropped. The Studio 1 went though quite a few revisions, eventually becoming the 1m; the very small floor standing transmission line Studio 0.5 was briefly available - and then eventually the Studio 0.75m, 1m, 4 and the RSTLm continued in parallel with the RTL and then the later T-Line range until the rights were sold to Richer sounds, who scrapped the whole range and put the TDL badge (dropping the "Electronics" part of the moniker) onto some budget nonsense of their own design. (Studio 5 & 10, Saturn, Nucleus etc)
In addition, there was a parallel range of TDL Monitors distributed in Europe by A.O.S.- mostly in kit form. Some were a 4 way, like the Monitor here, and some were a three way - similar to the Studio 4, but with the mid above the HF (known as the monitor compact) The distributer's product line started to diverge from the UK line when the Studio 4 was released, and they eventually started selling their own transmission line monitors with ATC & Scanspeak drivers.
Confusingly, the name "Monitor Compact" had been used by TDL a few years earlier in the UK for a bookshelf sized speaker.
Hello Tiertollie, no I never did find a circuit diagram. I did manage to reverse engineer the crossover and split it into three for triamping but it was put back to standard quite a while ago. I would still appreciate the circuit diagram though especially the component values. Mine have never been touched and neither have my IMFs. Tony L keeps telling me to get them done but they still sound great to me. I'm listening to my TDLs as I write this. They still sound magnificent.
I owe Jason C an apology. I did say I would post some pics but for some reason it never happened. I will though if there's still interest.
Hello Bob. No I never managed to get hold of a circuit diagram. I did remove the crossovers to split the mids from the tweeters and there are pics of both sides on page 1 of this thread. I’m considering putting them back to how they were but I don’t have the time right now. I’ll check if I have any better photos that will allow you to back engineer the circuit if that helps.