Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Sony 550 and LFE levels via analogue

A very good point. If Meridian don't do the 10dB boost internally and, with no sub, just blend LFE into the bass to "large" speakers, poor users like me are bass light.

We're going to have to agree to differ George. Mark's post refers to the 10dB gain being added back in at the RECEIVER, which is an line-level amp, albeit part of an integrated amp, but this section has a phono socket output the amp is built into the sub, no different to the analogue output on the back of my G68. Don't forget we're not all digital all the way to the transducer - I have 3m long phono leads coming out of the back of my G68 which feed 8 channels of analogue power amplification - all but my rears are bi-amped.

If you are expected with the Meridian solution to alter the level at the analogue amplifier then that means physically getting an SPL meter out and adjusting the master gain knob when you change sources. Sureley that can't be right.

I will be saying goodbye to this issue in about 2 hours - up until then I have to cut all the other channels by 10dB in the 550 in order to get the correct level from the sub at the listening position. Manufacturers of traditional integrated receivers costing 1/3rd of the price of the HD621 seem to do the job correctly but the more I think about it the more I think Meridian got it wrong. There's a perfectly usable workaround - set the sensitivity to 0.7V and cut all the speakers apart from the sub by 10dB.

All you have to do is use the right phrase in Google to find dozens of posts regarding the same subject where the solution has been to apply 10dB of boost at the pre-amp which last time I looked is what a G68 is.

Tim

They certainly think they do... That's not to say that there can't be a bug in the firmware as there was one in the recent past.

The G68's calibration routines should set you up with a 10dB boost on the *LFE* channel*. Using the G68 calibration tones, are you setting *every* channel to the same level on your SPL meter?

I now have a working sub again and plan to do quite lots of A and V calibration over the Easter w/end. Hopefully I'll be able to report back then.


* Any non-LFE bass transferred from the other channels should *not* have the boost.

All channels including the LFE should be input into the Meridian processor at the same level. The processor increases the LFE channel by 10dB. That is how it should work. I remember when the 568.2 first came out Meridian messed this up. I was making a big stink about it back then. In that case it was a little different. The bass management and LFE channel were separated by 20dB on the sub output when using the smartlink input. If you had bass management turned on the bass from your smaller speakers was played back 10dB too low on the sub output. It was eventually fixed.

My modified Bluray player works great using the smartlink input with all channels set to the same level in the player.