How to adjust output sound level on Riaa pre-amplifier (Beogram7000)

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HQS67 Posted: Sat, Mar 12 2016 1:21 PM

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Hi.

I have a Beogram-7000 hooked up to my Beovision Avant (1st. generation). Normal required sound level for the Avant is around 30 for both TV and an Apple-TV taht also are connected.

However for the Beogram I have to turn sound up to 50 - 60 to hear anything, which obviously then create some anoying background noise.

I am thinking that the output of the Beogram must be too weak. Can I somehow adjust output sound level on the Beogram-7000 (Riaa pre-amplifier) ??

Any advice will be highly appreciated.

Thanks so much in avdance.

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ProGram replied on Sat, Mar 12 2016 5:31 PM

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Hi,

it seems to be the cartridge, a weakened suspension of the needle is an often fault of those MMC. Try to push he tonearm down a little (gently) while playing. Better sound? And look for other postings referring to MMC.

Chris

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HQS67 replied on Sat, Mar 12 2016 7:44 PM

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Chris.

Thanks for your reply.

Now this is an interesting answer. I actually tried what you suggested, to gently put a finger on the arm while playing - no difference.

However, to give a little background, I managed to buy this turntable recently (from an authorized B&O "second-hand" shop), includig a new-renovated MMC4. Your answer makes me think, where to look - you think likely it could be the "new" MMC that is faulty or would it be more likely somewhere in hte turntable itself?? (tone arm, cabling etc.)

Thanks.

Henrik

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ProGram replied on Sat, Mar 12 2016 8:23 PM

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HQS67:

However, to give a little background, I managed to buy this turntable recently (from an authorized B&O "second-hand" shop), includig a new-renovated MMC4.

Hi Henrik,

Ah, ok. So your dealer should know about the poor durability of the original MMC pickups. But even a renewed one can be defective (again). The BG 7000 has a built-in RIAA pre amplifier, as you might know. There can be a fault as well: bad capacitors,...

Your remark about the "noise" made me think about the cartridge.

All in all I have nearly the same problem. I find the PHONO input is something quiet and kind of flat and not so alive like FM. But I have modified my Beogram 9000 with a Ortofon pick-up. And it is still a few steps lower than FM or CD

http://archivedforum2.beoworld.org/forums/p/16169/139579.aspx#139579