Getting overtone in a pair of bookshelf speaker.


I just bought a pair of Music Hall Marimba bookshelf speakers, and currently experimenting with placement. I changed the previous height of the tweeter by placing two books under each cabinet. During the first listening session, they sounded OK, but now today after the changes made, they sounded crinkly in the high end with somewhat of hollow overtone in the midrange.

I do not expect them to pressurize a 12X14 room with full sound, but I am a bit disappointed at the tonal balance. I have them about 4 ft from the side walls and 15 inches from back wall which is glass, but has slat shades that can be closed. They are approx 5 ft apart and occupy the far end of the long axis. Need suggestions on how to find ideal tonal balance. Thanks
sunnyjim
Wow, got a lot of flak on this one. It is not the end of the world; I will just sell them if I dislike them or made a mistake.

To Mapman: will follow your prescription and see what happens. I am not sure about the usefulness of aiming the tweeters 2-3 ft to the side, but I will that a shot.

To Rrog, I owned a pair of GM Europas about 8 years ago. Very nice speaker, but was a bit bass shy; They also are expensive used and heavy to ship.( there is a pair on AG now or was) As far as Von Schweikert VR-1, there was a pair on AG about a month ago, but could not come to agreement on price with buyer.I am still not convinced that this is the best bookshelf value out there. BTW, I bought the Marimbas from an internet dealer who may have not have an official return policy, and he does not have another speaker in his inventory that interested me in my price range

MoFI, the Marimbas have about 7 hours on them, so I am far from Nirvana. 400-500 hours seems alot as recommended by Marak

I do appreciate everybody's commments and advice, but there are many speakers out there to consider as an alternative to my main speakers. Totem's Dreamcatcher; Rainmaker, and even the short floorstanders like the Arro and Stff models are viable choices.

The Epos 5i and 12i though discontinued seemed to be favored by Bob Reina of Stereophile. I believe I auditioned the original M-12 about 7 years ago, and was impressed by "how right they sounded" I don't have the opportunity of auditioning that many speakers in Honolulu because the 2 only high end dealers display 2K and above speakers because every turn must count to stay in business.

As MOFI noted there are many choices out there; manybe I should have spent a bit more money and bought the freakin VR-1. Nevertheless, I am having fun.
"To Mapman: will follow your prescription and see what happens. I am not sure about the usefulness of aiming the tweeters 2-3 ft to the side, but I will that a shot. "

The main thing is to at least try having them not fire directly at you, but to either side of "the sweet spot" where you listen, possibly with speakers far apart and out from rear wall and closer to side walls. That will affect the high end and upper mids maybe for the better. Then play with teh placement away from the walls so no early reflections and to get the soundstage and imaging tuned in. Asymmetrical placement may even be OK. Listen for "holography" in the sound with this kind of placement, sound seemingly disassociated with the actual location of the speakers. You will be relying on reflected sound heavily rather than direct sound in a more typical nearfield listening type setup. Its all good (when it works)!

This are some things I have found useful in similar situations with small monitors in smaller rooms. Its easy and cheap to tweak speaker placement and I would always attempt to get a handle on that before jumping ship on any particular pair of speakers. There are many other tweaks that might be worth a try also once the speaker placement issue is addressed.
"MoFI, the Marimbas have about 7 hours on them, so I am far from Nirvana"

You need to put a lot more time on your speakers before you even listen to them. With only 7 hours on them, you should be able to hear a noticable difference in how they sound every few hours. At 30 to 40 hours they should start to level off, but you need to put at least 100 hours on them before you judge anything. Use white of pink noise at moderate volumes if you can.

What kind of amp do you have?
TO ZB542, The amps are a pair Red Dragon digital monoblocks, and a Bel Canto PRe3 line stage. Speaker cable: Audio Art SC-5 (not special edition, that is the SE version)