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Extreme Midrange Bloom

Hello: I'm using a BAT VK52SE with the 6H30DR tubes recommended by several folks here on the Gon. I've noticed an extreme emphasis in the upper midrange frequencies which is somewhat unsettling and in fact causes an almost artificial honking presentation. Is this simply the BAT house sound or is there something I can do to resolve this anomaly? I've never experienced this in any other preamp I've owned in the past. I love the build and general fit and finish of this preamp. The user interface is excellent. An audio enthusiast friend suggested this could possibly be a result of the oil filled caps BAT is using. Any help would be most welcome since the pre is great in every other way. Accurate bass, sweet highs and a very unfortunate bloated midrange.
frontier1
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
While I agree that swapping out the oil caps is a bit extreme, and not something I would recommend or do (I would move on to another preamp, as Davemitchell suggests), I do know that quite a few have switched out the BAT coupling caps in the VK-75SE amplifier with Teflon VH caps, and have reported increased clarity and transparency. Some have even said that this cap change has more sonic benefits than changing tubes. Try contacting member Dgarretson, and/or search the archives.

Cheers,
John
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
FWIW, VH Audio also has some oil caps too.

John
rodman99999
6,126 posts
 
Those teflon V-Caps do sound intriguing. AudioCap has teflon/tin foil caps as well. Same manufacturer as the MultiCaps I recommended. These caps are the creations of one Richard Marsh(the founder of Marsh Sound Design). If you know how good his electronics are: now you know part of the reason. One nice thing about tube gear- There aren't that many devices in the signal path(not really much to replace). Oh- the V-Caps take about 4 or 500 hrs to fully burn-in(so they say).
tsmack
35 posts
 
I have the BAT VKD5SE with SuperPak and the VK50SE. I have never found the BAT house sound to be "tubey". I think in many cases it can be a simple matter of tweaking power cords and cabling. The BAT tube gear has always provided me with a sense of air and presence that tubes do well, yet solid bass that is more like solid state.

In my experience, the power cord can often times take care of this type of "bloom". Sometimes too much of a good thing can lead to a bad thing and that may very well be the situation with your matching of components and cables. Since cables are rather inexpensive compared to components, I would recommend changing up some power cables or interconnects first. I have found the different Elrod power cables to be excellent for tubed front end gear. It would be good to know a little more about the entire setup including cabling to further look at the situation.
spaz
105 posts
 
It could be your room.I to have this excitement in the mids.No matter what I do it's still there.My room doomed..
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