Zuta LA 25 MKII User manual
FROM CLEAN TO EXTREME
Congratulations and thank you for purchasing the LA 25 MKII. This Amplifier was designed
to inspire you and elevate your playing all the way to the highest level. We really took the
long road on designing the LA 25 MKII because repeating ourselves was not an option.
We decided to take on the challenge and break a new ground. First of all we went for the
world wide renowned clean and functional Swedish design, using only the highest quality
components and materials available on the market today. Second we went for making it
logical and easy to operate and really improve both tactical and visual ergonomics for fast
operation and visibility of functions even in the dark. We are very proud to have achieved
building a power house amp under 7.8 Kg with it’s small physical footprint making it
possible to bring as a hand luggage on an airplane.
We also engineered everything in a 19“ Rack 3U format with only 17 cm depth. It can work
in any situation since you can put it in a studio rack, touring rack or even in a wooden headshell
if you would like to have that classic look of an amplifier. We packed it full with so many
features, some never done before like: a built in Re-Amplifier, a DI, a Virtual Mic speaker
simulator and a reactive load in one amp. You can use the LA25 MKII without any speaker
or an external load. The possibilities are limitless.
The original LA 25 has its own signature sound slightly darker and softer with just a slight
touch smoother top end in the Crunch and Vintage modes.The choices we made to alter the
core DNA of the LA 25 MKII resulted in a new brighter sonic palette and quite alot more gain.
As any other of our devices , this one requires very little care and just a little bit of attention to our
recommendations regarding maintenance. Please spend a couple of minutes to read this manual so
you can get the most out of the product. Remember and implement these few recommendations
for handling the product and you will be able to operate it for many years to come.
We hope you’ll enjoy this product
just as much as we enjoyed designing and making it
SAFETY INFORMATION
- Pollution Degree 2
- Maximum Relative Humidity: <80%
- Operation temperature range: 10 °C to 35 °C
- Ordinary Protection: This equipment should
not be exposed to dripping or splashing.
- Avoid placing objects filled with liquids,
such as vases or glasses, on this equipment.
- Storage and transportation temperature
range –25 °C to 45 °C
- Equipment suitable for continuous operation
This product complies with the
(2012/19/EU) WEEE Directive. The affixed
product label indicates that you must not
discard this electrical/electronic
product in domestic household waste.
No user serviceable parts inside Refer
all servicing to qualified service personnel.
By affixing the CE marking to a product,
a manufacturer declares that the product
meets all the legal requirements for CE
marking and can be sold throughout the EEA.
Keep away from rain or moisture.
No dripping or splashing.
No objects filled with liquids
should be placed on or near the product.
Read and follow these instructions of proper usage
Before going any further, make sure that your amplifier
is compatible with your mains electricity supply.
The (a) voltage selector must be set to match the local
power grid. The (c) fuse must match the local power
grid and the (a) voltage selector. Check what is written
in the field (d). If it matches the local power grid, you
are good to go. If it doesn’t match, the mains fuse has
to be changed.
Mains input & fuse: The specific mains input voltage
rating that your amplifier has been manufactured for
is indicated on the rear panel of the amplifier. Your
amplifier is provided with a detachable mains (power)
lead, which should be connected to the (b) mains
input socket on the rear panel of the amplifier. The
correct value and type of mains fuse is specified on
the rear panel of each amplifier. NEVER attempt to
bypass the fuse or fit one of the incorrect value or
type.
Changing the mains fuse: Make sure that the mains power lead is unplugged; Make sure that the
(21) voltage selector is set properly; Open the (23) mains fuse socket lid; Replace the fuse; Close the lid.
Transporting your equipment: Please ensure that your amplifier is switched off, unplugged from
the mains electricity supply and that all removable cables have been disconnected from your
equipment before attempting to move it. Keep the original box in case of shipping the amp to us
for repair or replacement.
Important set up information: Failure to select the correct impedance may damage your
amplifier. If connecting a speaker cabinet make sure that you use a proper speaker cable. Never
use a screened (shielded) guitar cable for this purpose.
a. Voltage selector switch
b. Mains input socket
c. Mains fuse socket
d. Mains fuse info label
e. Global fuse
acbd
-30
-20
-10
+0
10 Hz 100 Hz 1 KHz 10 kHz
freq. response
freq. response with low cut �
1 2 3 4 5 6 7 8 13
910 11 12 19
14 15 16 17 18
20 21 22 23 24 25 26 27 28 29 30 31
(re-amplifying mode), or guitar input 1/4 inch Jack Connector type. Only one type is used at a time.
10. FX - Activate / Deactivate FX loop. Use the FX RET pot control to adjust the signal
level that returns to the amplifier when the FX loop is active.
11. EQ - Modern EQ setting (IN)/ Vintage EQ setting (OUT) for the Virtual Microphone.
Use the DISTANCE and ANGLE to fine tune the virtual micing
12. GAIN panel - contains the gain controls for all channels
13. CH1 EQ - contains the TREBLE and BASS controls for CH1 only.
14. VOLUME panel - contains the volume controls for all channels
15. GLOBAL PRESENCE - eq for the power amp section
16. CH2+3 EQ panel - contains the EQ controls for CH2 and CH3
17. ST BY - Stand By button (Engaged - RED light. Disengaged - BLUE light)
18. POWER - Main power switch.
BACKPLATE
19. SHIPPED WITH - mains fuse value
20. Voltage Selector - Match the voltage to the local power grid
21. Mains Input Socket
22. Mains fuse - Fuse that protects the amp from wrong power input.
23. GLOBAL FUSE 1A - Fuse that protects the amps internal components
24. SPEAKER OUT - Standard speaker out connectors. USE ONLY ONE SPEAKER CABINET
25. VIRTUAL MIC panel - XLR type connector for MIC SIMULATOR
balanced/unbalanced signal output and switches for MIC/LINE LEVEL and GND LIFT
26. LINE OUT / SLAVE - standard connector for sending a signal to a slave amp
27. FX LOOP panel standard send and return connectors for the effects
28. PRE DI FX INSERT Insert point in the input signal chain. Use Y-cable with 1/4 “Jacks.
29. DI MIC OUT DI balanced/unbalanced microphone level output, type XLR.
DI GND LIFT - Disconnects the contact between the ground of the device
connected on DI MIC OUT and the ground of the amplifier. This will stop
unwanted noises caused by unwanted ground loops.
30. FOOTSWITCH - DIN 8 connector for the supplied Footswitch
FRONTPLATE
1.GROUND LIFT- Disconnects the contact between the ground of the sound source and the
ground of the amplifier. This will stop unwanted noises caused by unwanted ground loops.
2. DI FX - when using the DI MIC OUT output on the back of the amp, the signal from your
instrument will pass straight through unaltered unless this switch is engaged. When
engaged it activates the PRE DI FX INSERT loop on the back the amp. The signal will then be
processed by the effects present in the PRE DI FX INSERT loop. When a Y-cable is inserted
and external effects are present in the PRE
DI FX INSERT loop, these effectswillalways
feed the Pre-Amplifying stage of the amp
regardless of the state of this switch.
3. High Pass Filter - a switch common
for all tree channels. In the out position
you have a bigger bass and loser feel
and in the in position things are tighter
and more in your face with less extended
lows and more upper presence.
4. OPEN - a switch for dynamic compressor type effect. In the OUT position OPEN
emulates a compressor ( adds soft clipping and compression). There will be a little
drop in volume when the switch is in the OUT position due to the added compression.
Just turn the volume up a little to make up for the difference.
5. CH - is a non latching switch that cycles the channels.
6. PLEXI - a mode that is voiced to please players who love that wide open 60's British
sound. This is also a great platform to push with your favorite pedal in front of the amplifier.
PLEXI mode is a lower gain channel than MODERN (PLEXI button toggles between plexi
and modern). Like the older amps it emulates, the louder you turn it up the better it sounds.
7. BOOST - is a non latching switch Increased sensitivity (more gain) for CH2 and CH3.
8. BRGT - High frequencies are enriched when the CH1 (clean channel) is switched on.
9. LINE IN / INST - Combined connector for balanced / unbalanced line input type XLR
