ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi,
to the owners of a Beocenter 7700: it may be normal that the turntable is few steps lower in volume, but now, I found out, why the sound was also so shitty "dead" or "lifeless" compared to FM or tape. The darlington-transistors (IC100/200) are not the MPSA13 on the RIAA-Board as shown in the service manual. There were mounted BC549C transistors. They must be original, because there was no evidence of soldering, and the the position on the pcb is labeled TR100/200 (not IC). I changed them to the MPSA13 and the sound is now so much brighter. But the volume is still not as high as the other sources. Is there someone who increased the gain of the RIAA pre-amp?
Chris
Thanks for the insight Chris! I've also noticed a significant difference in apparent volume between the radio of my Beomaster 7000 and my Beogram 6500. It's about 5 volume increments on mine, and I've been considering options to alter the gain of the RIAA to compensate. When I have time I'll crack open the Beogram and look at the transistors on the RIAA board.
After further thought I wonder if the perceived volume difference is due to the levels of compression applied to the sources during recording (like the difference in dynamic range between original and remastered versions of albums on CD)? FM radio is generally heavily compressed. I assume my old vinyl predates the trend for heavy compression on recordings (Rick Rubin is particularly guilty of this). I may well be talking nonsense but just a thought!