I've had that issue with scopes going dim. There are folks here that can provide more guidance on scope repair issues. Many times, there are other issues in addition to or instead of bad CRT. Corroded connections or internal components that need to be replaced.
If it is the CRT, 4400 has a small display, so I suspect that you may have issues finding a new tube. It may be the same CRT that were used in the Marantz 19 tuner w/scope. Not sure, though.
Biggest challenge will be that Marantz has changed ownership several times. I believe it is still part of Philips' Denon division. Also realize that the manufacturer has long ago run beyond the period of supplying parts for that piece.
We had Pioneer scope w/test tone gen on display in the store. Currently am using Technics, and have had 4400. Marantz 4400 is one convenient unit, though I do prefer the Technics or Pioneer outboard units, due to larger displays.
I still have a Marantz Quad on our 5th sys at home. SQA2b, Wood Case and RC-4 remote, too.
I do understand your plight with soft passages getting lost. Loudness contour and fiddling with the tone controls are the closest you can come to a more compressed sound with the 4400. Sounds like that's what you're asking for.
Classical music and some flavors of rock have a much wider dynamic range (from a whisper to a scream.) Most other genres, not as much. In a concert hall, many classical pieces come alive as much because of dynamic range as anything else. Most modern classical recordings take advantage of that and assume that you'll want that openness, rather than compression.
If it is the CRT, 4400 has a small display, so I suspect that you may have issues finding a new tube. It may be the same CRT that were used in the Marantz 19 tuner w/scope. Not sure, though.
Biggest challenge will be that Marantz has changed ownership several times. I believe it is still part of Philips' Denon division. Also realize that the manufacturer has long ago run beyond the period of supplying parts for that piece.
We had Pioneer scope w/test tone gen on display in the store. Currently am using Technics, and have had 4400. Marantz 4400 is one convenient unit, though I do prefer the Technics or Pioneer outboard units, due to larger displays.
I still have a Marantz Quad on our 5th sys at home. SQA2b, Wood Case and RC-4 remote, too.
I do understand your plight with soft passages getting lost. Loudness contour and fiddling with the tone controls are the closest you can come to a more compressed sound with the 4400. Sounds like that's what you're asking for.
Classical music and some flavors of rock have a much wider dynamic range (from a whisper to a scream.) Most other genres, not as much. In a concert hall, many classical pieces come alive as much because of dynamic range as anything else. Most modern classical recordings take advantage of that and assume that you'll want that openness, rather than compression.
