Rupert Neve Designs 5025 User manual

Operations ManualOperations Manual
5025
Dual Shelford Microphone Preamplier

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the other.
A grounding-type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. If the
provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit from the
apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
15. This apparatus shall not be exposed to dripping or splashing, and no
object filled with liquids, such as vases or beer glasses, shall be placed
on the apparatus.
16. Do not overload wall outlets and extension cords as this can result in a
risk of fire or electric shock.
17. This apparatus has been designed with Class-I construction and must
be connected to a mains socket outlet with a protective earthing
connection (the third grounding prong).
18. This apparatus has been equipped with a rocker-style AC mains power
switch. This switch is located on the rear panel and should remain
readily accessible to the user.
19. The MAINS plug or an appliance coupler is used as the disconnect
device, so the disconnect device shall remain readily operable.
20. NOTE: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment o and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the
receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
CAUTION: Changes or modifications to this device not expressly
approved by Rupert Neve Designs LLC, could void the user's authority to
operate the equipment under FCC rules.
21. This apparatus does not exceed the Class A/Class B (whichever is
applicable) limits for radio noise emissions from digital apparatus as
set out in the radio interference regulations of the Canadian Department
of Communications.
ATTENTION — Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant las limites applicables aux appareils
numériques de class A/de class B (selon le cas) prescrites dans le
réglement sur le brouillage radioélectrique édicté par les ministere des
communications du Canada.
22. Exposure to extremely high noise levels may cause permanent hearing
loss. Individuals vary considerably in susceptibility to noise-induced
hearing loss, but nearly everyone will lose some hearing if exposed to
sufficiently intense noise for a period of time. The U.S. Government’s
Occupational Safety and Health Administration (OSHA) has specified
the permissible noise level exposures shown in the following chart.
According to OSHA, any exposure in excess of these permissible limits
could result in some hearing loss. To ensure against potentially
dangerous exposure to high sound pressure levels, it is recommended
that all persons exposed to equipment capable of producing high
sound pressure levels use hearing protectors while the equipment
is in operation. Ear plugs or protectors in the ear canals or over the
ears must be worn when operating the equipment in order to prevent
permanent hearing loss if exposure is in excess of the limits set forth
here:
Important Safety Instructions
CAUTION AVIS
RISK OF ELECTRIC SHOCK. DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL
ATTENTION: POUR EVITER LES RISQUES DE CHOC ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE.
AUCUN ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER.
CONFIER L'ENTRETIEN AU PERSONNEL QUALIFIE.
AVIS: POUR EVITER LES RISQUES D'INCENDIE OU D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE
A LA PLUIE OU A L'HUMIDITE
The lightning flash with arrowhead symbol within an equilateral triangle is
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.
Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral
est utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de
"voltage dangereux" non isolé d'ampleur suffisante pour constituer un risque
d'éléctrocution.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé
pour alerter les utilisateurs de la présence d'instructions importantes pour le
fonctionnement et l'entretien (service) dans le livret d'instruction
accompagnant l'appareil. WARNING — To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.
Duration,
per day in
hours
Sound Level
dBA, Slow
Response
Typical Example
8 90 Duo in small club
6 92
4 95 Subway Train
3 97
2 100 Typical music via head phones
1.5 102
1 105 Siren at 10 m distance
0.5 110
0.25 or less 115 Loudest parts at a rock concert
PORTABLE CART
WARNING

Table of Contents
Introduction
Block Diagram
Front Panel
Rear Panel
5025 Features
Specications
Limited Warranty
1
1
2
3
4
6
7

Rupert Neve Designs 5025: Dual Shelford Microphone Preamp
Thank you for purchasing the Rupert Neve Designs 5025. We hope you enjoy using this product as much as we have
enjoyed designing and building it. The 5025 features two channels of custom Rupert Neve Designs Transformer Mi-
crophone Preamplier, custom Rupert Neve Designs output transformers with SILK, Class-A analog signal paths, and a
variable Sallen-Key High-Pass Filter.
1
5025 Block Diagram
VU METER
2 1
4
3
G
LINE OUT
+
2 1
4
3
G
-6dB LINE OUT
+
20Hz-250Hz
FREQ
Ø
SILK
HPF
TEXTURE
GND
LIFT
48V
+48VDC
2
3
4
1
MIC INPUT
GND
-
TRIM
+/-6dB CONT.
+
MIC PRE
6dB STEPS
C1
cw
GAIN

5025 Front Panel
2
RUPERT NEVE DESIGNS
CHANNEL 1
PEAK
CHANNEL 2
PEAK
5025
DUAL SHELFORD
MIC PRE
36
30
24
18
12
60dB 66
60
54
48
42
20Hz 250Hz
100
MIN MAX
0dB
-6 +6
TEXTURE
TRIMGAIN FREQ
36
30
24
18
12
60dB 66
60
54
48
42
20Hz 250Hz
100
MIN MAX
0dB
-6 +6
TEXTURETRIMGAIN FREQ
SILK48V
HPF
SILK48V
HPF
CHANNEL 1 CHANNEL 2
GAIN
12-position rotary switch
that adjusts the micro-
phone preamp gain from
0 to +66dB in 6dB steps
48V
Illuminated push-button
switch that engages
+48V Phantom Power
HPF
Illuminated push-button switch that engages the 12dB/octave Sallen-Key High-Pass Filter
FREQ 31-detent potentiometer that allows the user to adjust the High-Pass Filter corner frequency from 20Hz to 250Hz
VU Meter
VU meter that indicates channel output signal level. 0VU=+4dBu
PEAK Peak LED that illuminates when the output signal level has reached -3dB below clip point
SILK
Illuminated push-button switch that toggles through the available SILK modes: OFF, RED, BLUE
Ø
Illuminated push-button switch that inverts the polarity of the input signal
TRIM 31-detent potentiometer that adjusts the gain of the input signal within a range of +/- 6dB
TEXTURE 31-detent potentiometer that allows the user to adjust the level of transformer harmonics added within the output stage

5025 Rear Panel
3
MIC INPUTMIC INPUT
CHANNEL 1
GND
LIFT
GND
LIFT
CHANNEL 2
POWER
100-240 VAC
50/60Hz
45 Watts
MADE IN USA
Rupert Neve Designs, LLC
Model 5025
CAUTION
Risk of Electric Shock
Disconnect from outlet
before removing cover
MAIN OUTMAIN OUT -6dB OUT-6dB OUT
5025-00001
Rupert Neve Designs, LLC
Model 5025
POWER
IEC standard 3-pin grounded AC
power inlet with power switch
100-240VAC 50/60Hz
-6dB OUT
Custom Rupert Neve Designs transformer-coupled -6dB line output
GND LIFT
Slide switch that lifts XLR Pin 1
from chassis ground on MAIN
OUT and -6dB OUT
MAIN OUT Custom Rupert Neve Designs transformer-coupled line output
MIC INPUT
Custom Rupert Neve Designs
transformer-coupled microphone
preamp input

4
5025 Front-Panel Features
48V
This illuminated push-button switch toggles +48V phantom power ON and OFF.
Ø
This illuminated push-button switch inverts the polarity of the input signal.
High Pass Filter
This illuminated push-button switch engages the 12db/octave Sallen-Key high-pass lter.
Frequency
This 31-detent potentiometer allows the user to adjust the corner frequency of the High-Pass Filter within a range of
20Hz to 250Hz.
SILK
This illuminated push-button switch toggles through three available modes: OFF, RED, and BLUE SILK. Red Silk has a
high-frequency pre-emphasis, while Blue Silk has a low frequency pre-emphasis.
Texture
This 31-detent potentiometer allows the user to adjust the amount of SILK harmonics added to the custom Rupert Neve
Designs transformer output stage.
Gain
This 12-position rotary switch allows the user to adjust the microphone pre-amplier gain from 0 to +66dB in 6dB steps.
Trim
This 31-detent potentiometer allows the user to adjust the gain of the input signal within a range of +/- 6dB.
VU Meter
This illuminated VU meter indicates the output signal level for it’s corresponding channel. 0VU = +4dBu
Peak
This front panel LED illuminates red to indicate when the output signal level is 3dB below clip point to warn the user
that they are approaching clipping.
VU Meter Endstop Adjust
Important: The recessed black adjuster below the VU meters come factory trimmed and should not need any further
adjustment. These adjusters allow for VU meter needle bottom endstop calibration (one tick mark below -20VU).

Power
IEC standard 3-pin grounded AC power inlet with power switch. 100-240VAC 50/60Hz input range with a maximum AC
power consumption of 45W.
Ground Lift
This slide switch can be used to help eliminate a ground loop in a studio environment, if encountered. In the LIFT po-
sition, XLR Pin 1 on MAIN OUT and -6dB OUT is disconnected from chassis ground. Each channel has its own separate
ground lift.
Main Out
Neutrik XLR jack line output utilizing custom Rupert Neve Designs transformer-coupled, balanced output. Maximum
output signal level is +26.7dBu at 1kHz.
-6dB Out
Neutrik XLR jack line output utilizing custom Rupert Neve Designs transformer-coupled, balanced output. Maximum
output signal level is +20.7dBu at 1kHz.
Mic In
Neutrik XLR jack microphone input utilizing custom Rupert Neve Designs transformer-coupled, balanced input. Maxi-
mum input signal level is +24.9dBu at 1kHz.
5
5025 Rear-Panel Features

All specications are typical
ZSOURCE= 150 Ω Balanced, 30 ft. XLR cable on specied output
Input Impedance 2.2 kΩ
Maximum Input Level @ 1 kHz +24.9 dBu
Maximum Ouput Level @ 1 kHz (Main Out) +26.7 dBu
Maximum Output Level @ 1 kHz (-6dB Out) +20.7 dBu
Frequency Response
20 Hz to 20 kHz +/- 0.25 dB
10 Hz to 62 kHz +/- 0.5 dB
5 Hz << -3 dB
70 kHz -3 dB
THD+N% (BW 10Hz - 90kHz)
0dBu Input, 1kHz < 0.0025 %
+20dBu Input, 1kHz < 0.008 %
Noise at Main Output (BW 22Hz - 22kHz)
0dB Gain -102 dBu
+30dB Gain -94 dBu
+66dB Gain -61 dBu
EIN (+66dB Gain) -127 dBu
Noise at -6dB Output (BW 22Hz - 22kHz)
0dB Gain -107 dBu
+30dB Gain -100 dBu
+66dB Gain -67 dBu
EIN (+66dB Gain) -133 dBu
Product Dimensions (W x D x H) 19” (48.3 cm) x 9.2” (23.4 cm) x 1.75” (4.4 cm)
Shipping Dimensions (L x W x H) 24” (61 cm) x 13” (33 cm) x 4” (10.2 cm)
Shipping Weight 11 lbs. (5 kg)
6
5025 Specications

PRODUCT WARRANTY
Rupert Neve Designs warrants this product to be free from defects in materials and workmanship for a period of three
(3) years from date of purchase, and agrees to remedy any defect identied within such three year period by, at our
option, repairing or replacing the product.
LIMITATIONS AND EXCLUSIONS
This warranty, and any other express or implied warranty, does not apply to any product which has been improperly
installed, subjected to usage for which the product was not designed, misused or abused, damaged during shipping,
damaged by any dry cell battery, or which has been altered or modied in any way. This warranty is extended to the
original end user purchaser only. A purchase receipt or other satisfactory proof of date of original purchase is required
before any warranty service will be performed.THIS EXPRESS, LIMITEDWARRANTY IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, TO THE EXTEND ALLOWED UNDER APPLICABLE STATE LAW. IN NO EVENT SHALL RUPERT NEVE
DESIGNS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THIS
PRODUCT. Some states do not allow the exclusion or limitation of consequential damages or limitations on how long
an implied warranty lasts, so this exclusion may not apply to you.
WARRANTY SERVICE
If you suspect a defect in this product, please call us at 512-847-3013 or contact our support sta (service@rupertneve.
com) for troubleshooting. If it is determined that the device is malfunctioning, we will issue a Return Material
Authorization and provide instructions for shipping the device to our service department.
Rupert Neve Designs
PO Box 1969
Wimberley TX 78676
www.rupertneve.com
tel: [phone]
fax: [phone]
775-00042 Rev A
7