Peavey Nitrobass User Manual

NITROBASS

™

Professional Bass Amplifier

NITROBASS

™

Professional Bass Amplifier

O PERATING G UIDE

2

Intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Intended to alert the user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the product.

CAUTION: Risk of electrical shock — DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer

servicing to qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before

using this appliance, read the operating guide for further warnings.

Este símbolo tiene el propósito, de alertar al usuario de la presencia de “(voltaje) peligroso” sin ais­lamiento dentro de la caja del producto y que puede tener una magnitud suficiente como para constituir
riesgo de descarga eléctrica.

Este símbolo tiene el propósito de alertar al usario de la presencia de instruccones importantes sobre la
operación y mantenimiento en la información que viene con el producto.

PRECAUCION: Riesgo de descarga eléctrica ¡NO ABRIR!
PRECAUCION: Para disminuír el riesgo de descarga eléctrica, no abra la cubierta. No hay piezas útiles dentro.

Deje todo mantenimiento en manos del personal técnico cualificado.
ADVERTENCIA: Para evitar descargas eléctricas o peligro de incendio, no deje expuesto a la lluvia o humedad

este aparato Antes de usar este aparato, Iea más advertencias en la guía de operación.

Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur la présence d’une tension dangereuse
pouvant être d’amplitude suffisante pour constituer un risque de choc électrique.

Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur qu’il ou qu’elle trouvera d’importantes
instructions concernant l’utilisation et l’entretien de l’appareil dans le paragraphe signalé.

ATTENTION: Risques de choc électrique — NE PAS OUVRIR!

ATTENTION: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve à l’intérieur

aucune pièce pouvant être reparée par l’utilisateur. Confiez I’entretien et la réparation de l’appareil à un réparateur
Peavey agréé.

AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n’exposez pas cet appareil à la
pluie ou à l’humidité. Avant d’utiliser cet appareil, lisez attentivement les avertissements supplémentaires de ce
manuel.

Dieses Symbol soll den Anwender vor unisolierten gefährlichen Spannungen innerhalb des Gehäuses
warnen, die von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.

Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam
machen, die Handhabung und Wartung des Produkts betreffen.

VORSICHT: Risiko — Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden

sich keine Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von qualifiziertem
Fachpersonal durchführen lassen.

ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses Gerät nicht dem Regen
oder Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.

NITROBASS

™

PROFESSIONAL BASS AMPLIFIER

Congratulations on your purchase of the Peavey NitroBass™. The NitroBass includes an easy-to­use, three-band active EQ with shiftable mid-range control and a contour control (for that smiley­face EQ curve). These tone controls are so versatile you should be able to quickly dial up your own
sound.

Also provided are a buffered tuner send jack, an electronically balanced XLR line out with its own
level control, pre-post EQ switch, and a ground lift switch. The XLR output is before the master
volume control, so you can adjust your stage volume without affecting the send to the main sound
system.

A -10 dB input pad switch, footswitchable post-EQ effects loop, preamp output/power amp input
patch points, and the DDT

™

(speaker protection) enable/defeat switch add to the list of professional

features found in the NitroBass.

For more information on operation and specifications we suggest that you spend a few minutes to
look through this manual. Pay close attention to the safety precautions. They contain warnings that
concern the safety of both you and your amp. Thank you for buying Peavey!

Features:

• Compact top box design

• 450 watts into 2 Ω, 300 watts into 4 Ω, 170 watts into 8 Ω

• Three-band active EQ with shiftable mid-range control

• Contour control

• -10 dB pad switch (active/passive pickup switch)

• Buffered tuner send jack

• Footswitchable post-EQ effects loop

• Electronically balanced XLR jack

• Pre-/Post-EQ send switch for XLR jack

• Ground lift switch for XLR jack

• DDT

™

speaker protection with defeat switch

• Preamp out/power amp in jacks

3

ENGLISH

AC POWER FEATURES:

1. REMOVABLE AC POWER CORD

This receptacle is for the IEC line cord (included), which provides AC power to the unit.
Connect the line cord to this connector and to a properly grounded AC supply. Damage to
the equipment may occur if an improper line voltage is used. (See voltage marking on unit.)
Never remove or cut the ground pin of the line cord plug. This unit is supplied with a properly
rated line cord. When lost or damaged, replace this cord with one of the proper ratings.

NOTE: FOR UK ONLY

As the colors of the wires in the mains lead of this apparatus may not correspond with the
colored markings identifying the terminals in your plug, proceed as follows: (1) The wire which
is colored green and yellow must be connected to the terminal which is marked by the letter
E, or by the earth symbol, or colored green or green and yellow. (2) The wire which is colored
blue must be connected to the terminal which is marked with the letter N, or the color black.
(3) The wire which is colored brown must be connected to the terminal which is marked with
the letter L or color red.

2. POWER SWITCH

This switch is used to turn the NitroBass on or off. To turn the unit on, flip the switch to the
“on” position.

3. GROUND POLARITY SWITCH

Three-position, rocker-type switch, which for most applications should be operated in the
center (zero) position. If hum or noise is present with the ground switch in the center position,
place the ground polarity switch to positive or negative (+ or -) to minimize hum; should a
problem continue, consult your authorized Peavey dealer, the Peavey factory, or a qualified
service technician. Note: The ground switch is not available on 220/240 volt models.

4. FUSE

The fuse is located within the fuse holder on the rear of the unit. If the fuse should fail, IT
MUST BE REPLACED WITH THE SAME TYPE AND VALUE IN ORDER TO AVOID
DAMAGE TO THE EQUIPMENT AND TO PREVENT VOIDING THE WARRANTY. If the amp

repeatedly blows fuses, it should be taken to a qualified service center for repair.

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REAR PANEL

2

4

1

3

NOTE: THE FUSE SHOULD ONLY BE REPLACED WHEN THE REMOVABLE POWER
CORD HAS BEEN DISCONNECTED FROM ITS CHASSIS RECEPTACLE (1).

5. POWER/STATUS LED

Located on front panel this LED illuminates green when the Power Switch is in the “ON”
position and AC power is supplied. During normal operation the LED also acts as a DDT
indicator. The LED illuminates red when the DDT speaker protection is active. When DDT is
defeated, the LED will illuminate red when clipping occurs.

FRONT PANEL FEATURES:

6. INPUT JACK

This input will accept signals from all types of bass pickups.

7. INPUT PAD SWITCH

Provided for instruments that have extremely high output, which can result in overdriving
(distorting) the input stage. Pressing the switch to its “in” or “active” position reduces the
level of the input signal by 10 dB.

8. BRIGHT SWITCH

Provides a preset boost to treble frequencies when pressed.

9. TUNER SEND JACK

A 1/4" jack is provided for connecting an instrument tuner. This jack is buffered off the input
jack so it is just like plugging directly into the tuner.

10. PRE GAIN CONTROL

Controls the input gain of the preamplifier.

11. CONTOUR CONTROL

Provides a specially voiced EQ as the knob is rotated clockwise. When the knob is fully
counterclockwise (set to 0), there is no voicing added.

12. LOW CONTROL

An active tone control (shelving type, ±15 dB) that varies the low frequency boost or cut.

5

9

18 17 19 20 23 25 2621 22

6

7108

11 12 13 14 15 16 5

24

13. MID CONTROL

An active tone control (peak/notch, ±15 dB) that varies the midrange boost or cut.

14. MID SHIFT CONTROL

Selects the frequency band (200 — 2 kHz) that the mid control cuts or boosts.

15. HIGH CONTROL

An active tone control (shelving type, ±15 dB) that varies the high frequency boost or cut.

16. VOLUME CONTROL

Controls the overall volume level of the amplifier. The final level adjustment should be made
after the desired sound has been achieved.

17. LINE OUT—XLR JACK

Provides low impedance, electronically balanced signal for patching into a sound
reinforcement or recording console.

18. LINE OUT LEVEL CONTROL

Controls the output level of the balanced line out.

19. PRE-/POST-EQ SELECT SWITCH

Allows selection between a Pre-EQ (switch set to the “out” position) or a Post-EQ (switch set
to the “in” position) send to the XLR line out jack.

20. GROUND LIFT SWITCH

Provided to lift the ground on the XLR jack when ground loops are encountered.

21. EFFECTS SEND JACK

Output for supplying signals to external low-level effects or signal processing equipment.

22. EFFECTS RETURN JACK

Input for returning signals from external low-level effects or signal processing equipment.

23. EFFECTS LOOP REMOTE SWITCH JACK

This jack accommodates the remote footswitch (optional part number 00051000 ON/OFF
single button switch), which is used to remove the effects loop from the signal path. The
remote footswitch essentially acts as a bypass to punch in or punch out from your external
effects.

24. DDT

™

SPEAKER PROTECTION DEFEAT SWITCH

DDT™ speaker protection is defeated when the push button is in the “in” position. We
recommend that DDT be enabled at all times to protect the speakers.

25. PREAMP OUT JACK

This 1/4" jack is used to route the preamp signal to external inputs, such as the input of an
additional power amp. The signal is post volume control. Use of this jack does not defeat the
signal to the NitroBass amp (some volume difference may be noticed due to the impedance
change experienced when adding an external unit to the signal patch).

6

7

REAR PANEL FEATURES:

27. POWER CORD RETAINERS

Use the Power Cord Retainers to wrap and store your cable while storing or transporting your
NitroBass. It is best to disconnect the cord from the unit before wrapping.

28. SPEAKER OUTPUT JACKS

These two 1/4" jacks provide the powered signal from the amplifier. Each connector is
electrically the same (in parallel). Use one of the jacks to connect your speaker cabinet and
the other to add a second speaker cabinet in parallel. The minimum speaker load impedance
is 2 ohms (or two 4-ohm speakers in parallel).

Warning: To prevent the amplifier from overheating, the front fan and rear-located vents
should always remain clear of obstructions.

26. POWER AMP IN JACK

This 1/4" jack is used to input an external signal to the power amp section of the NitroBass.
Using this jack will disconnect any signal from the preamp section. Using this jack along with
the preamp out jack creates a possible second effects loop.

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27 27

Send

NITROBASS

™

Block D

iagram

8

Effects

-10 dB, 0,

315 VRMS

Effects Loop

Return

Effects

Footswitch

Effects Loop

Midrange

Midrange

High Shelf

Shelving EQ

Buffer

Shift

Midrange

200HZ - 2KHZ

(Treble)

+/- 15 dB

Low Shelf

+/- 15 dB

Cut/Boost

(Bass)

+/- 15 dB

Buffer

CW

Volume

Buffer

Full Range

PreAmp Out

Line Level

1 VRMS, 0dB

Pwr Amp In

Switch Logic

Line Level

1 VRMS, 0dB

Infrasonic

Bright

Filter

Input

Contour

Gain

2

1

-10 db Pad

In/Out

-10 db Pad

Pre-

Gain

Tuner Send

Instrument Level

Buffer

Post EQ

Pre EQ

Select

Pre/Post EQ

Out

Line Level

Line Out

Balanced

+

CW

2

-

3

Line Drivers

Ground Lift

1

Buffer/DDT

DDT Defeat

Power Amp

External

Speaker Jack

Minimum Load is

2 Ohms:

450 Watts RMS

with 2 Ohm load

300 Watts RMS

with 4 Ohm load

Status LED

Red = DDT/Clip

Green = Pwr On

GN

RD

170 Watts RMS

with 8 Ohm load

9

NITROBASS

™

Recommend Settings

Rock
Setting

Slap
Setting

Out

In

Set to appropriate level for instrument used

Set to appropriate level for instrument used

Doesn't matter when Mid is set to 0

Set as necessary

NOTE: “DDT should be utilized for

maximum speaker protection”

Set as necessary

Blues/
Country
Setting

Out

Set to appropriate level for instrument used

NOTE: “DDT should be utilized for

maximum speaker protection”

Set as necessary

NOTE: “DDT should be utilized for

maximum speaker protection”

10

SYSTEM SPECIFICATIONS:

Mains Fuse = 8 amps
Mains Voltage = 120 VAC 60 Hz
Power Consumption = 350 watts
Hum and noise: Typically greater than -89 dB unweighted with
controls set as follows…
Pad = Passive
Bright = Normal
Pre gain = 5
Contour = 0
Low = 0
Mid = 0
Mid Shift = 1kHz
High = 0
Volume = 5

POWER AMPLIFIER SECTION:

PROTECTION:

Electronic current limit protection circuit.
Thermal protection circuit.
D.C. crowbar protection circuit.
DDT speaker protection circuit with defeat switch.
Variable speed fan, thermally controlled

GENERAL INFORMATION:

Minimum load = 2 ohms
Input sensitivity: 1.0 VRMS
Two 1/4" speaker jacks in parallel

RATED POWER OUTPUT:

450 watts (30.00 V RMS) into 2 ohms
300 watts (34.64 V RMS) into 4 ohms
170 watts (36.88 V RMS) into 8 ohms

TYPICAL POWER OUTPUT

475 watts (30.82 V RMS) into 2 ohms

with no more than 1% THD+N

308 watts (35.10 V RMS) into 4 ohms

with no more than 1% THD+N

177 watts (37.63 V RMS) into 8 ohms

with no more than 1% THD+N

NOISE:

Typically greater than 102 dB below full power @

8 ohms unweighted

DDT Dynamic Range:

Typically greater than +15 dB

FREQUENCY RESPONSE:

+0/-0.61 dB, 100mW to 160 W RMS, 20 Hz to 20 kHz
(8 ohm load, typically below 0.2% THD+N)

PREAMPLIFIER SECTION:

SETTINGS FOR MEASUREMENTS UNLESS
OTHERWISE NOTED:

Pad = out (Passive)
Bright = out (Normal)
Pre-Gain = 5 (12 o’clock)
Contour = 0 (fully counterclockwise)
Bass = 0 (12 o’clock)
Mid = 0 (12 o’clock)
Mid Shift = 0 (12 o’clock)
High = 0 (12 o’clock)
Master Volume = 10 (fully Clockwise)
Line Out Level = 10 (fully Clockwise)

INPUT SENSITIVITY (Level to achieve full power):

With Pad Out...
Nominal input: 100 mV RMS
Minimum input: 9 mV(pre gain and master fully CW)
Maximum input: 3.0 V(maximum signal at input before

clipping occurs)

With Pad -10 dB in:

Nominal input: 315 mV RMS
Minimum input: 28 mV (pre gain and master fully CW)
Maximum input: 9 V (maximum signal at input before

clipping occurs)

EQUALIZATION:

Bright boost: + 8 dB @ 5 kHz
Contour: Special frequency compensation
Bass: ± 15 dB @ 30 Hz, Shelving type Eq
Mid : ± 15 dB @ 200 @ 2 kHz (Mid shift control determines

center frequency)
Mid Shift: 200 to 2 kHz
High: ±15 dB @ 8 kHz, Shelving type Eq

TUNER SEND:

Instrument level through a buffer

LINE OUT:

-∞ to -10 dB (for nominal input).
Level is dependent on level control setting and pre gain setting

EFFECTS LOOP:

Set for -10 dB (0.315 V RMS) with pre @ 5, Master @ 10
Controlled via footswitch, ground tip to defeat.

PREAMP OUTPUT:

1 V RMS nominal

NITROBASS

™

SPECIFICATIONS

NITROBASS

™

Amplificador profesional para bajo

Felicitaciones por tu compra del NitroBass™de Peavey. El NitroBass incluye un ecualizador activo
de tres bandas con control de cambio de medios y control de silueta que es fácil de usar (para
lograr esa curva de ecualización de cara feliz). Estos controles de tono son tan versátiles que
podrás obtener tu sonido muy rápidamente.

También se incluyen entradas de afinador, una salida de nivel de línea XLR balanceada electrónica­mente y que tiene su propio control de nivel, control de ecualización pre y post, así como un inter­ruptor de tierra. La salida XLR va antes del control de volumen para que puedas ajustar tu volumen
de escenario sin afectar el envío del sistema de sonido principal.

Un interruptor de pad de 10 dB, circuito de efectos post EQ controlable por pedal, puntos de
parcheo salida de preamp/entrada de ampli de poder, y un interruptor activar/cancelar para el sis­tema DDT

™

de protección de bocinas se añaden a la lista de características profesionales encon-

tradas en el NitroBass.
Para más información sobre la operación y las especificaciones te sugerimos que tomes unos minu-

tos para leer este manual. Presta mucha atención a las precauciones de seguridad. Contienen avi­sos que conciernen tu seguridad y la de tu ampli. ¡Gracias por comprar Peavey!

Características:

• Diseño compacto de caja superior

• 450 wats a 2 Ω, 300 wats a 4 Ω, 170 wats a 8 Ω.

• Ecualizador activo de tres bandas con control cambiable de medios

• Interruptor de pad de 10dB (interruptor de pastilla activa/no-activa)

• Conector amortiguado para envío de afinador

• Circuito de efectos por EQ controlable por pedal

• Entrada XLR balanceada electrónicamente

• Interruptor de envío para salida XLR Pre-/post EQ

• Interruptor de levantamiento de tierra para salida XLR

• Protección para bocinas DDT

™

con interruptor de cancelación

• Conectores salida de preamp/entrada de ampli de poder

11

ESPAÑOL