Epifani UL 901 User manual

UL 901
Bass Amp

Thank you for purchasing a UL 901 Bass Amp, and welcome to the Epifani family! You are about to experience
Legendary Sound. We hope you love it.
Being an Epifani player puts you in the company of some of history’s most inuenal bassists. Aer all, it
was their invaluable feedback that helped Nick Epifani design every amp, combo, and cabinet down to the
smallest detail. Over the past 23 years, we’ve been making bass gear in cooperaon with legends like Anthony
Jackson, Oteil Burbridge, and Ron Carter, just to name a few. Our relaonship with them has shaped the Epifani
experience you’ll have today and in the future.
Your UL 901 is as much a piece of hand-craed, Hi-Fi studio gear as it is a rugged, road-ready bass amp.
Every detail has been meculously engineered to ensure you’re able to dial in exactly the sound you want in any
playing situaon.
Less is more
When dialing in your perfect tone, keep in mind just how powerful the UL 901’s controls are. Nick recommends
making small EQ shis at rst. When it’s set at, the amp will produce a precise aural picture of your bass,
strings, and hands. You might nd that just a small adjustment brings your perfect tone into focus in most
playing situaons.
We also recommend that you experiment with cung the bass, mid, and treble just as much boosng them.
Somemes the shortest distance between you and your perfect tone is taking out a lile of the boom caused by
a hollow stage, or the bark of a bass with too much gain from the bridge pickup.
We want you to have an incredible Epifani experience. So, if there is anything at all we can do to help,
please feel free to get in touch any me. You can reach us online at www.Epifani.com/support or over the phone
at [phone].
Thank you. And, have fun!
- The Epifani Team
Safety Information
Welcome and Thank You
/Epifaniamps
@Epifaniamps
@Epifaniamps

Safety Information
1. Read these instrucons.
2. Keep these instrucons.
3. Heed all warnings.
4. Follow all instrucons.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any venlaon openings. Install in
accordance with all applicable manufacturer’s instrucons.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
ampliers) 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 third prong is provided for your safety. If the provided
plug does not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cable from being walked on or
pinched parcularly at the plugs, convenience receptacles,
and the point where they exit from the apparatus.
11. Only use aachments/accessories specied by the
manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table
specied by the manufacturer, or sold with the apparatus.
When a cart is used, use cauon when moving the cart/
apparatus combinaon to avoid injury from p-over.
13. Unplug this apparatus during lightning storms or when
unused
for long periods of me.
14. Refer all servicing to a qualied service personnel.
Servicing is required when the apparatus has been damaged
in any way, such as the 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. Do not overload wall outlets and extension cords as this
can result in a risk of re or electric shock.
16. Never push any foreign objects of any kind into the
openings as they may touch dangerous voltage pointsthat
could result in re or electric shock. The apparatus shall not
be exposed to dripping or splashing and no objects lled
with liquids such as a beverage container should come in
contact with the unit.
17. This apparatus has been designed with Class-I
construcon and must be connected to mains socket outlet
with a protecve earthing connecon (the third grounding
prong).
18. The MAINS plug or an appliance couple is used as the
disconnect device, so the disconnect device shall remain
readily operable.
19. Exposure to extremely high noise levels may cause
permanent hearing loss. Individuals vary considerably in
suscepbility to noise-induced hearing loss, but nearly
everyone will lose some hearing if exposed to suciently
intense noise for a period of me.

1. Input Jack
Connect your instrument using a standard 1/4 inch
instrument cable.
2. Acve/Passive Switch
Provides a 10 dB cut for acve basses to avoid
unwanted distoron.
3. Gain
Controls the volume of the signal passing through the
EQ stage.
4.Bass
Acve shelving EQ with 22 dB boost @ 40 Hz
5. Mid
Acve bandpass EQ with 17 dB boost @ 450 Hz
6. Treble
Acve shelving EQ with 22 dB boost @ 3 kHz or 6 kHz
7. Treble Shi
Sets the apex for the Treble control to 3 kHz if pushed
in, or 6 kHz if out.
8. Mid Cut Switch
Acvates Mid Cut EQ. Green light is on when acve.
9. Mid Cut Level
Provides up to 8 dB of cut @ 800 Hz. When engaged,
turning the knob all the way to the right (clockwise)
produces no cut. Turning the knob to the le
(counterclockwise) cuts high-mid frequencies.
10. Mute
Mutes the amplier. Red light is on when engaged.
11. Master Volume
Controls the overall volume of the amplier. Other
outputs including the DI, Tuner Out, and
Eects Send are not aected by the Master Volume
control.
Note: The Mute is automacally engaged when you
turn on the amplier so you can set your Gain level
before sending sound through to the speakers.
Front Panel Rear Panel

1, 2. Eects Loop Send and Return
Use a 1/4-inch cable to connect the input of your
eects to the Send jack, and the output of your
eects to the Return jack.
3. Eects Mix
Mix between a dry (unaected) signal and a wet
(eected) signal when using the Eects Loop.
4. Pre/Post EQ Switch
When the switch is engaged (post EQ) DI signal will be
shaped by the acve EQ. When the switch is
disengaged (pre EQ), EQ will not aect DI.
5. DI Level
Adjusts the output level of the DI.
6. Power On/O
Turns your amplier on and o. There is a 2-second
delay as the amplier performs a self-diagnosc.
7. Neutrik Speakon™ / 1/4” Combo Speaker Output
Connect either a Speakon twist-lock speaker cable or
1/4-inch speaker cable.
8. Tuner Out
Connect your electronic tuner via a standard 1/4-inch
instrument cable.
9. Pedal
Use a TRS 1/4-inch cable to connect the oponal foot
pedal. Use the foot pedal to engage/disengage the
Mid-Cut feature and Mute.
10. Ground Li
Disconnects the chassis ground from the DI Output to
reduce 60-cycle hum.
11. DI Output
A balanced, low impedance output. Connect a
standard XLR microphone cable to send a signal to a
mixing console or recording device.
12. Universal AC Power Port
Use the included cable to connect your UL 901 to a
standard power source.
13. T10 AL 250 Volt Fuse
Protects UL 901 from power surges that can damage
the amplier.
Front Panel Rear Panel

Get Ready
1. Before turning your amplier on, always set the
MASTER VOLUME control to the zero posion.
2. Turn your UL 901 on using the power switch located
on the back of the amplier. The POWER indicator
light on the front panel will illuminate.
Note: Upon power-up, the amplier will go through
a self-diagnosc test for about 2 seconds before it is
fully funconal.
Then, the MUTE feature will engage and its light will
be illuminated red. You will also see the PEAK light
illuminate green.
4. Turn the volume controls on your instrument to their
full, or loudest posions.
5. Set the EQ controls (BASS, MID, and TREBLE) to
zero (twelve oʼclock posion).
Set The Gain
6. With the MASTER VOLUME sll set at zero, begin
playing aggressively while turning up the GAIN control.
When the LED light is green there is sll potenal to
increase the gain. When the light starts ashing red,
your input is too hot and your signal will distort.
For the cleanest sound, allow the LED indicator to
ash red intermiently while playing aggressively.
Make Some Noise
7. Disengage the MUTE buon. Itʼs light will turn o.
8. Turn the MASTER VOLUME control clockwise to
the desired listening volume. At this point you should
hear your instrument through the speakers.
Sculpt Your Sound
9. By adjusng the EQ controls, the sound of your
instrument can be shaped in very subtle or very
dynamic ways.
The UL 901 pre-amp is designed to work like the
channel strip of a professional mixing console—a lile
EQ goes a long way.
In fact, many sound engineers start with the EQ in the
at posion and cut rather than boost frequencies to
achieve the desired sound.
They then add gain to make up the loss of volume due
to the reducon in EQ. Cung back is oen preferred
to boosng.
10. The MID CUT level adjusts the amount of mid-
range frequencies that will be reduced when you
engage the MID CUT switch.
This feature actually gives you an addional level of
control as you change playing styles or when changing
your instrument. Itʼs almost like having a second
channel.
Quesons? Visit www.Epifani.com/support and tell us how we can help.
Dialing In Your Sound Warranty Information

SpecificationS
Conguraon
Single Channel Preamp
Class-D Power Amp
Switch-Mode Power Supply
Power Output
UL 901 [750W]
750 Was RMS @ 4 Ohms
UL 901 [1000W]
1000 Was RMS @ 2 Ohms
Voltage
Auto Adjusng Voltage
115 Volts or 240 Volts, 50 or 60 Hz
750 or 1000 Was
Weight
6 pounds (2.7 Kg)
Dimensions
11.25 inches (W) x 10 inches (D) x 3 inches (H)
285 mm (W) x 254 mm (D) x 76 mm (H)
Amplier Response
20Hz - 25kHz
Sensivity
98 dB (1W @ 1m)
Connectors
Input: 1/4-inch TS Phone Jack
Passive: 470KΩ
Acve: 200KΩ
Output: Combinaon Speakon™ and 1/4-inch
Send: 1/4-inch TS Phone Jack 200KΩ
Return: 1/4-inch TS Phone Jack 50KΩ
Tuner Out: 1/4-inch TS Phone Jack
Foot Switch: 1/4-inch TRS Phone Jack
Direct Out: Low Impedance XLR w/ Level Control
Pre/Post EQ: Selectable Switch sets DI Output to
Pre or Post EQ
Tone Controls
Bass: Shelving, +22 dB @ 40 Hz
Mid: +17 dB @ 450 Hz
Treble: Shelving, +22 dB @ 3 kHz or 6 kHz
Mid Cut: -8dB @ 800Hz
Your UL 901 amp is covered under a limited warranty against defects in materials and workmanship for a period
of 2 years. This warranty is non-transferable.
The warranty period starts from the date of purchase from an Authorized Epifani Dealer. Proof of purchase
from an Authorized Epifani Dealer is required for warranty service.
You must obtain a return authorizaon number from an Epifani team member before sending your amp to
Epifani for repair. Please contact us at www.Epifani.com/support. Any product shipped to Epifani without a
return authorizaon number will be refused.
You may be responsible for shipping charges. Epifani is not responsible for shipping damage, either to or from
our service center. Claims must be led with the carrier.
The only company in the US authorized to perform work under this warranty is Epifani located in New York, NY.
Warranty Service may be dierent in your country. Please contact the Epifani distributor in your country for
terms and procedures.
Dialing In Your Sound Warranty Information

www.epifani.com