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Re: Behringer Ultracurve 8024 veterans please help ... too much bass ...

80.193.225.181

Posted by Kuei Yang Wang on April 28, 2003 at 17:56:20

In Reply to: Behringer Ultracurve 8024 veterans please help ... too much bass ... posted by PW on April 28, 2003 at 11:16:16:

Koinichiwa,

> Audio Note AN/K speakers

Not exactly what you call bass heavy speakers. Even the AN/E are pretty light.

> EL34 parallel SET at ~15W/ch

Nice, warm sounding Valve, hardly bass champion.

> REL Strata subwoofer

Nice sub.

> Room size: 2.3m(W) x 4.8m(L) x 2.8m(H)

Looks good on paper, except a bit narrow. The room modes seem reasonably well spaced too.

> I live in a high raise apartment, even with no pink noise output,
> the mic picks up some low freq signal from the surroundings

Wait for a quiet sunday morning or the like.

> together with the typical room mode at around 25-40Hz and 60Hz,
> I have a very hard time attenuating the low freq, even without
> the Rel connected.

This seems somewhat incredible, unless all your walls are very stiff, there are no windows and no doors that can flex and thus reduce the room mode Q.

> All my Para EQs are used to attenuating the low freq at 29,
> 40 and 60 Hz,

How did you arrive at these frequencies? They seem not particulary related to any room mode I'd expect. I'd probably expect 36 & 72 + 75Hz as the biggest offenders, strictly based on room dimensions given.

> even at max setting (-48dB),

MAX SETTING? The worst rooms I have seen do not need much more than 18 - 24db EQ.

> the main EQ (after running Auto-Q) still need to attenuate -16dB
> at those freq.

That does not seem right at all. I think there is something fundamentally wrong with your approach and/or the mike.

> 1. Did I do it correctly by the master fader to –6dB and
> limit the boost to 6dB max to avoid clipping?

I'd say yes.

> 2. How to fix the low freq problem (too much attenuation
> needed)

You first need to find out what causes it. if you use the AN/K on their own and still have huge LF peaks I'd suspect the measurement setup first.

> 3. How to fix the overflow problem?

Run sensible EQ settings. The more you attenuate in the parametric EQ's the more processing power.

I mean do you realise that you are attenuating the LF by over 60db!!!!!! My room is not that different from yours (wider than high though) and I have around 15db attenuation for the worst mode and at the same time a little broadband boost in the same region as the speakers start rolling off and I want a slightly "warmer" than flat tone).

Sayonara

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