Behringer Ultrabass BVT5500H Owner's Manual

ULTRABASS BVT4500H/BVT5500H

About speaker impedance

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  POWER AMP INPUT: To connect an external preamplifier 

to the BVT, use this ¼" TS jack.

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  PREAMP OUTPUT: To connect an external power amplifier 

to the BVT, use this ¼" TS jack.

EFFECTS LOOP jacks
To connect the BVT4500H/5500H to an effects processor you can 

use one or, alternatively both of these jacks ((29)- (30)). Keep in 

mind that the BVT4500H and the BVT5500H do not process effects 

in the same way. For details, see “THE SIGNAL PATH”.
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  RETURN  jack: To  send  an  audio  signal  from  an  effects 

processor to the BVT, use this ¼" TS jack.

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  SEND jack: To send an audio signal from the BVT to an 

effects processor, use this ¼" TS jack.

LINE OUTPUT features
To send an audio signal from the BVT to a mixer or a recording 

unit, use the LINE OUTPUT features ((31) - (34)), as follows:
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  LEVEL control: To adjust the level of any LINE OUTPUT, 

turn this knob toward min (no level) or, alternatively max.

The value of the max setting depends on what you selected via 

the PRE/POST button (33). If you selected:

 

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PRE: max is ~ 0 dB.

 

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POST: max is ~ 10 dB.

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  GND LIFT button: To manage the ground connection be-

tween the BVT and a mixer/recording unit, use this button.

When this button is:

pushed out, you maintain a ground connection that prevents 

 

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electrostatic charges from interfering with an audio signal.
pushed in, you break the ground connection. Do this only when 

 

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ground-loop hum interferes with an audio signal.

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  PRE/POST button: To select the type of signal you want to 

send to a mixer/recording unit, use this button.

When this button is:

pushed out (PRE EQ and effects), the BVT does not apply any 

 

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preamp features (TONE/EQ/EFFECTS) to the audio signal.
pushed in (POST EQ and effects), the BVT applies all preamp 

 

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features to the audio signal.

For details, see “THE SIGNAL PATH”.
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  BALANCED OUTPUT: To connect the BVT to the mic input 

on a mixer or, alternatively to a recording unit, use this XLR 

jack (balanced).
Before you connect the BVT4500H/5500H to mic input 

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  TUNER OUT jack: To connect the BVT4500H/5500H to an 

electronic tuner, use this ¼" TS jack.

To tune while muting the PARALLEL SPEAKER OUTPUTs, do 

one of the following. If you work with:

the  BVT4500H,  turn  the 

 

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MASTER  control  to  0  (minimum 

setting).
Alternatively, you can use the tuner’s mute feature: Connect 

EFFECTS SEND (30) to the tuner input and EFFECTS RE-

TURN (29) to the tuner output. When you:

activate the mute feature on the tuner, the tuner does not 

 

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send the audio signal to the RETURN jack.
deactivate the mute feature on the tuner, the tuner sends 

 

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the audio signal to the RETURN jack. The audio signal 

follows  the  signal  path  to  the  PARALLEL  SPEAKER 

OUTPUTs.

the BVT5500H, activate the mute feature 

 

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The  total  impedance  of  the  speakers  that  you  connect  to  the 

BVT affects the power output of the BVT. The minimum speaker 

impedance is 4 Ω. When the total load is 4 Ω, the BVT supplies 

the optimal power.
How to calculate the speaker impedance
When using more than one speaker and each connecting to an-

other BVT speaker jack, the speakers are connected in parallel. 

To calculate the resulting total impedance of the speakers, use 

the following formula—

—where Z

1

, Z

2

 etc. are each the impedance of a single speaker 

and Z

total

 is the resulting impedance of all speakers.

For two speakers (Z

1

 and Z

2

), the formula reads as:

2

1

2

1

total

Z

Z

Z

Z

Z

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⋅

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Via the formula, you get a 4 Ω load with:

one 4 Ω speaker

 

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two 8 Ω speakers

 

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one 8 Ω speaker and two 16 Ω speakers

 

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