AndrewJohn

Welcome @Carsten Frandsen, glad you found us! What kind of modifications did you do to your m200t? Sounds like a cool project.

It's going to be hard to find any documentation ..., as you already did what I would do - use some AI engines out there (way better than just using Google)... I think you are going to have to reverse-engineer such data using electronics analysis instruments and such - that may or may not be at your disposal. Here's why: Every Carver Corp documentation about SoftEQ says that it is the same as DTL - just renamed. I have read tech's descriptions about DTL circuitry (paraphrasing what my head retained) and that is that it varies from implementation component to component. Why? No one really knows, it's a mystery - and it could be due to production / cost decisions or real engineering changes from Bob or others on that side. Second thing to be aware, Carver Corp., ended just as data was more and more digital..., meaning that not much was retained when the doors closed, and some have noted that dumpsters were the primary method of archival..., I've always pondered someone coming up with a hard disk with all kinds of data, engineering docs, marketing literature/art..., but alas, nope, not going to happen since the demise/end was just as "data" like we know it today, started to fill up the ether. Lastly, few of the old timers are still around, or remember, if they are. Bob is now retired, and when some have visited, it's a challenge sometimes, communicating, let alone asking about something he might remember from 1987, almost 40 years ago. The last thing I would consider is that anyone that had the curve data, would have published it by now..., the fact is that DTL is not that common except for a few fans. I have a DTL (actually two) stand-alone units, and I'm going to gut one, and make it into something else - repurposing the chassis). Point being that it was a standalone, then a feature in CD players, then a "new" feature in it's "SoftEQ" incarnation..., all that happened back in the mid 80's of the last century..., before the IBM PC and data started to get collected and Archived for small and medium sized businesses like Carver Corp. I know that's not what you want to hear - but it's my perspective at the moment. IF by chance you DO come up with an EQ curve data, we'd love for you to post it here - along with the archives so it can be preserved.

Welcome, Travis. I'm a boomer, but my plumber today thought I was 15 years younger..., he got a glimpse of my stereo gear... LoL. Seriously, you will never go back! Allkinds of ways to get modern streaming to sound better than coming from a smart phone speaker... Questions? Just ask them here.

Welcome!

Welcome! Glad you found us. We love pictures, post some of your gear if you like

Welcome to the site Teresa @THammond. Glad you found us. Are you technically savvy at all? My intent is to learn if the help you seek is to find a tech, or to get in there and be the tech. We got both kinds of new members here. The safest is to work with Nelion, as already suggested - that requires sending the preamp to them. OTOH, a power switch going bad is something that a good local tech *might* also be able to source and repair for you if that is all your preamp needs.

Welcome PaulF3rd. Interesting offer - I'm good with the C-2 I have. Pondering Acustats..., but I'm way far away, north midwest!

Welcome to the site - lots of good reading here in the archives, on the m1.0t amps, and fixing them.

Good to see you posting, @BluesMan57. Great tune, playing it now!

Of that series of receiver, the HR-752 is my favorite. I'd get it professionally restored. And, of course..., we LOVE pictures of gear, speakers, etc. Welcome to The Carver Site !

Welcome @ssurfer, glad you found us. TFM-35 is a super amp, and totally worth refreshing back to it's original glory. Heed the advice above on where/how to get it done.

Welcome @Old Man. So glad you found us. I have one of those C400 amps, paired with a 4000t preamp (very similar to the C4000). Glad you found us. Start a thread on your amp project..., we love pictures and watching the resurrection of a good piece of gear!

Welcome to TCS. Fuses should be readily available. I buy them on Amazon. Hardware stores also have them, sometimes. It should say on the fuse you are replacing, or on the back of the amp, what type and size fuse you need.

Could well be. A post from the guy on Audiogon (link above) indicated that he contacted Factor Electronics, back in 2019, and they sent him an owners manual. I shot an email to the support address at Factor Electronics with the same request..., I haven't heard back.

Thanks, Greg. In the interest of "completeness..." Here's the Amazon Product Description: Product Description Carver high fidelity five channel amplifier. Carver signature audio quality. 5 x 150 watts RMS at 8ohms. 5 x 200 watts RMS at 4ohms. LED status display. Balanced XLR and unbalanced RCA inputs. 12VDC trigger inputs. Gold plated binding posts. Individual channel automatic on/off And the bullet list of features: Here are the pictures that Amazon has on that link - it's 5 years old, so I suspect it won't work eventually - so here's the images, captured for permanency..., as this HTA5A ( HTA-5A ) question has come up a few times.