Check your DSP settings on the Marantz - perhaps it is doing some processing that is messing things up....
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This is a very unusual system but, it seems to me, the likely culprit is the Bose system. You may appreciate some things about it but, clearly, the lack of midrange presentation says otherwise. I have yet to hear an AcoustiMass system that has a decent midrange, despite the common criticism of its highs and lows.
That's a satellite system with separate bass module, right?
Often high bass levels tend to obscure mid-range detail, which is where most vocals occur.
If applicable, try lowering bass levels by moving bass module out from walls and away from any corner and see what that does. If it helps, then you might tweak location further to obtain the best possible balance between low end weight and midrange detail.
Shadorne, I cycled through the settings, seems like 5ch Stereo produced the nicest sound - still presents the same issue though, but perhaps just a little less obvious.
Chayro, will take a look at the Denon cart. Sounds like I will have to dig around for some NOS. Thanks for the suggestion.
Mapman, you are correct, separate bass module. Will try re-locating and see what that does.
In general, just for my own knowledge, in terms of the original question around adding an in-line EQ, does that seem like a solution that would make a material impact on sound quality, specifically mid-range?
You are correct. The Technics arm is of moderate mass. The Sonus is a very high-compliance cart, probably not the best match. I ran a quick calculation (via http://www.cartridgedb.com/tools.asp) and it looks like the resonant frequency is roughly 5.23Hz - which could produce some low-level distortion. Looks like I should stick to a moderate to low compliance cart.
The 2 1/2" cubes just can't produce mids.You might be able to
force some out of them with an EQ,but at a loss of over driving the little drivers.The mids are most likely trapped in the woofer box.They contain a 5 1/4" woofer,a good size for mids.Bose won't give any spec's,and its my understanding that they sue reviewers for publishing the spec's of tested Bose systems,watts,frequency response,etc.
I saw some good reviews on the Denon DL-301 MKII. Any experience with that cart on the Technics arm?
Hifitime, I guess the decision to go with the cubes was based in-part on a spatial constraint. I live in a small apartment and the cubes produce a decent surround sound (they double as tv/dvd/xbox/blu-ray audio) and are practically invisible. Any speakers/sub combo that you have used that have a similar size profile but produce a more balanced sound?
Thanks again all for the comments, most helpful.
Dear Greenr: You can try your Sonus cartridge ( I own it and is very good in that midrange frequency range. ) with a different headshell ( different build material and headshell weight. ) and with different headshell wires. Even you can try different capacitance values to load the cartridge.
Regards and enjoy the music,