Musical Fidelity V90-HPA User Manual

V90-HPA Headphone Amplifier and 24 bit/96 kHz

Asynchronous USB DAC

Instructions

Introduction

Thank you for purchasing the V90-HPA headphone
amplifier. We sincerely hope that it will bring you many
years of outstanding listening pleasure.

Installation Precautions

Your new V90-HPA is designed and built to provide
trouble-free performance, but as with all electronic devices,
it is necessary to observe a few precautions:
Do not use the V90-HPA near water. The unit must not be
exposed to dripping or splashing and no objects filled with
liquids, such as vases, must be placed on the unit.
Keep the V90-HPA away from heat such as radiators. No
naked flame sources, such as lighted candles, should be
placed on the unit.

Power Supply Note:

Only use
use of other adaptors or supplies could seriously damage
the V90-HPA.
This Hi-fi product has been tested to ensure that its
operation is not adversely affected by normal background
levels of Radio Frequency Interference (R.F.I.), and that it
does not itself generate excessive amounts of interference.
However, if a problem persists, please contact your Musical
Fidelity agent.
Never open the case of the V90-HPA yourself, as this will
invalidate the guarantee.
Place all connecting cables where they are not likely to be
walked on or trapped by items placed on them.
The V90-HPA will operate in accordance with its
specifications within the following environmental range:
Temperature 5 to 45 degrees Celsius
Humidity 10 to 90% non condensing
There are no user adjustments inside. Please refer all
service work to an authorised Musical Fidelity agent.

approved

Musical Fidelity DC power supply. The

Connections

All connections must be made before the mains adaptor is
plugged in, and before any amplifier connected is switched
on. Always switch off the equipment attached to the V90­HPA before connecting or disconnecting power, changing
leads or inputs.

Inputs
Using good quality RCA leads (not supplied), connect the
left and right outputs from a CD player or other audio source
to the V90-HPA INPUT sockets.

Outputs
Two headphone sockets are available to allow a greater
range of headphones to be used without need of adaptors.
Connect headphones into the correct output socket of the
V90-HPA.

Note: If connecting into an
can conveniently be connected to the TAPE REC outputs of
any pre- or integrated amplifier. If the TAPE REC outputs
are still required by e.g. tape or CD recorder, then the
OUTPUT sockets (back panel) of the V90-HPA reproduce
the input source currently selected by the setting of the
INPUTS switch i.e. LINE or USB.
The back panel OUTPUT sockets are unaffected by the
volume control and are therefore suitable for recording
either from LINE or USB inputs.

Power
Plug the DC connector lead from the power supply unit into
the V90-HPA power inlet socket, and plug the adaptor itself
into a convenient wall mains outlet. The blue LED will light
to confirm the unit is ready for use.

existing

system, the V90-HPA

USB input
A good quality USB A to B cable is required to connect the
unit to the computer.
Plug the B (square) end into the socket in the back of the
V90-HPA
Plug the A (rectangle) end into a free USB socket on your
computer.

Additional USB information

On the host computer, a new device will be available,
whenever the V90-HPA is plugged in. Use this device to
listen to music stored or played from this host computer.
CD, MP3, WAV files played on any software should now
play through the internal USB DAC.
This device works with the normal USB audio drivers as
supplied with Windows XP, Windows VISTA, Windows 7, 8
and Apple OS-X and later. Musical Fidelity does not supply
or support any third party or update drivers for this device.
The computer drivers for the USB input of the V90-HPA
should install automatically. If they do not, please consult
computer system administrator/technical support. To check
correct installation follow these steps:

PC /Windows users
Check the computer has picked up the device and is
currently using it by clicking: (most Windows versions)

- Start

- Settings

- Control panel

- Sounds and Multimedia

- Audio

Check “V90-HPA 24/96” appears under PREFERRED
AUDIO DEVICE tab.

Mac users
Check the computer has picked up the device and is
currently using it by clicking: (MAC OS X)

- System preferences

- Hardware

- Sound

Check that “V90-HPA 24/96” is selected under the
OUTPUT tab. If the computer’s warning sounds/chimes are
to played through the internal DAC, make sure it is selected
under the SOUND EFFECTS tab too.

This device is a high speed serial data processor, and by
its nature, requires a very high volume of USB bandwidth. It
will benefit greatly from being the only device connected on
its USB ‘port’. Sharing the same port with other devices may
cause unwanted artefacts such as dropouts or temporary
loss of signal. This especially includes the use of the unit on
a USB hub/splitter alongside other USB components.

With the USB cable plugged in, the internal USB DAC is
automatically recognised no matter what input is currently
selected. When INPUTS selector switch is set to USB, the
green LOCK LED will light to show that the USB DAC is
correctly setup. The green LOCK LED goes out when the
INPUTS switch is set to LINE position but the internal USB
DAC is still connected and ready to use whenever required.

Use
With volume turned down, switch unit on and plug in
headphones. Select USB or LINE INPUT as required using
the input switch. Adjust the volume control for a comfortable
listening level, sit back and enjoy the music.
These products have been designed so that it may be left
on indefinitely, but please note that the mains adapter may
become warm to the touch - this is normal.

Power LED Power switch USB Lock LED Input selector Volume control Phone jack 6.35mm Phone jack 3.5mm

RCA inputs Left & Right RCA outputs Left & Right Async. USB input DC power input socket

Basic problem-solving with an amplifier is similar to troubleshooting other electrical or electronic equipment.

y

Problem Probable Cause Remed

No power Power supply not switched on.

Power plug is not fully inserted

No sound – analogue

No sound - USB

Wrong connections between input
source and the V90-HPA

Volume turned right down

USB device not working

Check power supply is plugged in
and switched on (blue LED lit)

Plug into rear socket securely

Check headphone lead is
connected and secure
Check INPUTS switch position
and audio input lead connections.

Check volume is adjusted
accordingly. Take care not to turn
up too high!

Check USB input lead is securely
connected.
Green LOCK LED will light when
an active digital/USB stream is
detected

and

See “Additional USB Information
section” to check computer has
recognised and is using “V90-HPA
24/96” for playback.

USB input selected.

Hum Audio connector not secure Insert plug so full contact is made.

If none of these actions affect a cure, please contact the dealer, or an authorised Musical Fidelity service agent.

the product indicates that the product must not be disposed of as normal household
waste. To prevent possible harm to the environment please separate the produc t from
other waste to ensure that it can be recycled in an environmentally safe manner.
Please contact your local government office or your retailer for available collection

acilities. f

arrière du produit, indique que celui-ci ne doit pas être traité comme un déchet
domestique commun. Afin de protéger l'environnement, ce produit électronique devra
être géré séparément et donc recyclé selon les nouvelles normes Européennes Rohs
concernant les déchets d'appareils électroniques. Prière de contacter les services
concernés gouvernementaux ou votre point de vente pour l'élimination et l'enlèvement
de déchets électroniques équipés de composants électroniques.

panel trasero del producto indica que el producto no se debe reciclarse como basura
normal de la casa. Para prevenir daños posible al ambiente separe por favor el
producto de otras basura para asegurarse de que puede ser reciclada de una manera
ambientalmente segura. Entre en contacto por favor a su oficina gubernamental local
o a su min rista para las instalaciones disponibles de la colección. o

indica che il prodotto non deve essere smaltito tramite la procedura norm ale di
smaltimento dei rifiuti domestici. Per evitare eventuali danni all'ambiente, separare
questo prodotto da altri rifiuti domestici in modo che possa venire riciclato in base alle
procedure di rispetto ambientale. Per maggiori dettagli sulle aree di raccolta

isponibili, contattate l'ufficio govenativo locale od il rivd

das Produkt nicht mit konventionellem Hauskehricht entsorgt werden darf. Um
Schäden und Verschmutzungen an Umwelt und Mensch zu vermeiden, muss das
Produkt fachgerecht entsorgt und von anderem Abfall getrennt werden. Wenden Sie
sich bei Fragen hierzu an Ihren Fachhändler oder an eine öffentliche
Informationsstelle.

Remember; never open the case of the V90-HPA, as this will invalidate the guarantee.

Item disposal information for Europe

DISPOSAL
The crossed out wheeled bin label that appears on the back panel of

DISPOSITION
La poubelle sur roulettes barrées X, qui apparaît en logo sur le pa nneau

DISPOSAL
La etiqueta cruzada hacia fuera del compartimiento que aparece en el

RIFIUTI
L'etichetta del cassonetto barrato riportato sul retro dell'apparecchio

FACHGERECHTE ENTSORGUNG:
Das auf der Geräterückseite angebrachte Label deutet darauf hin, dass

enditore del prodotto.

AFVAL

Het label op de achterzijde van dit apparaat, een afvalbak op wielen met
een kruis doorgehaald, geeft aan dat dit apparaat niet samen met gewoon
huishoudafval mag worden weggegooid. Om mogelijke schade aan onze
leefomgeving te voorkomen dient dit apparaat, gescheiden van gewoon huishoudelijk
afval, te worden afgevoerd zodat het op een milieuvriendelijke manier kan worden
gerecycled. Neem voor beschikbare inzamelplaatsen contact op met uw gemeent elijke
reinigingsdienst of met uw elektronica leverancier.

HÄVITTÄMINEN

Yliruksattua jäteastiaa kuvaava tarra tuotteen takalevyssä kertoo, että
tuotetta ei saa käsitellä normaalina talousjätteenä. Ympäristön suojelemiseksi on tuote
pidettävä erillään muusta jätteestä ja se on kierrätettävä ekologisesti kestävällä
tavalla. Ota yhteyttä laitteen myyjään tai Pirkanmaan Ympäristökeskukseen lähimmän
kierrätyskeskuksen löytämiseksi.

AFSKAFNING

Logoet med en skraldespand med kryds over på bagsiden af apparatet
indikerer at dette produkt ikke må kasseres som normal husholdningsaffald. For at
forebygge mulig skade på miljøet, bedes De separere dette produkt fra andet affald, og
sikre at det bliver genbrugt på en miljørigtig måde. Kontakt venligst de lokale
myndigheder eller din forhandler for oplysning om nærmeste tilgængelige
opsamlingssted for elektronikaffald.

ΔΙΑΔΙΚΑΣΙΑ ΑΠ

ΟΡΡΙΨΗΣ

ΤΟ ΣΗΜΑ ΜΕ ΤΟΝ ΔΙΑΓΕΓΡΑΜΜΕΝΟ ΤΡΟΧΗΛΑΤΟ ΚΑΔΟ
ΑΠΟΡΡΙΜΑΤΩΝ ΣΤΗΝ ΠΙΣΩ ΟΨΗ ΤΟΥ ΜΗΧΑΝΗΜΑΤΟΣ ΔΗΛΩΝΕΙ ΟΤΙ ΤΟ
ΠΡΟΙΟΝ ΑΥΤΟ ΔΕΝ ΠΡΕΠΕΙ ΝΑ ΔΙΑΧΕΙΡΙΣΘΕΙ ΣΑΝ ΣΥΝΗΘΙΣΜΕΝΟ ΟΙΚΙΑΚΟ
ΑΠΟΒΛΗΤΟ. ΠΡΟΣ ΑΠΟΦΥΓΗ ΕΝΔΕΧΟΜΕΝΗΣ ΕΠΙΒΑΡΥΝΣΗΣ ΤΟΥ
ΠΕΡΙΒΑΛΛΟΝΤΟΣ, ΞΕΧΩΡΙΣΤΕ ΤΟ ΠΡΟΙΟΝ ΑΠΟ ΤΑ ΑΛΛΑ ΑΠΟΡΡΙΜΑΤΑ ΩΣΤΕ
ΝΑ ΕΞΑΣΦΑΛΙΣΘΕΙ Η ΑΝΑΚΥΚΛΩΣΗ ΤΟΥ ΜΕ ΤΟΝ ΠΡΕΠΟΝΤΑ ΤΡΟΠΟ.
ΠΑΡΑΚΑΛΟΥΜΕ ΝΑ Ε
ΑΝΑΚΥΚΛΩΣΗΣ Η ΜΕ ΤΟ ΚΑΤΑΣΤΗΜΑ ΑΓΟΡΑΣ ΓΙ Α ΠΕΡΙΣΣΟΤΕΡΕΣ
ΛΕΠΤΟΜΕΡΕΙΕΣ.

ΠΙΚΟΙΝΩΝΗΣΕΤΕ ΜΕ ΤΗΝ ΤΟΠΙΚΗ ΥΠΗΡΕΣΙΑ

Specifications: Power 0.25W /channel into 32 Ohms
Output devices 2 per channel

THD <0.005% typical 20Hz-20 kHz
Signal/noise ratio >109dB ‘A’ weighted
Input impedance 25 KΩ

Power requirement: 12V DC 500mA

Connections: Line level inputs:
USB input
Line level outputs:
Headphone outputs 1 Stereo Jack socket 6.35mm, ¼”
1 Stereo Jack socket 3.5mm, ⅛”
Power input 1.3mm DC power socket

Dimensions: Length 117mm
Width 170mm
Height 47mm including “feet”

Weight: Unit alone 600g 1½lbs

Accessories
(supplied)

Power Supply Unit
Leaflet

Musical Fidelity reserves the right to make improvements which may
result in specification or feature changes without notice. E&OE.

1 pair line level RCA connectors,
1 Type “B” asynchronous, 16-24 bits, up to 96kHz sample rate
1 pair RCA [switch-selected input, fixed output at 0dB or x1]

4⅔”
6⅔”
1⅔”

1.1Kg Total packed carton

12V DC
V90-HPA

2½lbs

500mA
Instruct
ions

Suitable for 10-600Ω ‘phones Output impedance 50Ω

20Hz to 80 kHz Frequency response +0, -1dB

including terminals and volume

1 off
1 off

Units 24-26

Fulton Road

Wembley

HA9 0TF

England

(+)44 208 8900 2866

http://www.musicalfidelity.com/

Manual issue 01