Alphanso Martina 12 is a bass amplifier suitable for small or medium size room practice or studio. You must have a little expertise to operate this amp, perfect choice for beginners to professionals. However, Martina 12 will blow your mind with its crystal clear bass and looks (in various colored designs). To understand it’s full capability, here is some overview or primary observation you may know before purchase. For a complete study of the amp, you can download its user manual and look through it. With multiple input facility you don’t need to purchase different amplifiers to play with backtracks, this one can handle both.


Product Overview

Alphanso Martina 12 has been designed from the modern integrated circuitry. This one is solid-state semiconductor amplifier. Martina 12 is able to handle 2 input signals at a time (one mono and one stereo). 45 watt is enough for room practice with electric basses or acoustic basses, backtracks and overdrive. Inside this combo bass amp, a 10-inch speaker is mounted and that could bring out very sharp bassy tones. Martina 12 amp has its own built-in 3 band tone control that responses upto ±12dB, individual active/passive pre-amps, overdrive pre-amp, 30 watt external speaker output, a stereo input pre-amp and a stereo phone out.





Martina 12


Bass Amp


45 watt


Solid State





10 inch


3.5mm Stereo

External Output:

30w Output







3 Band





16in / 40.6cm


14in / 35.6cm


10in / 25.4cm


9.6kg / 21.2lbs



Model Types Power Technology
Martina 12 Bass Amp 45 watt Solid State
Input Speakers Outputs External Output
2 10 inch 3.5mm Stereo 30w Output
Overdrive Send/Return Equalizer Compressor
Yes None 3 Band None
Height Width Depth Weight
16in / 40.6cm 14in / 35.6cm 10in / 25.4cm 9.6kg / 21.2lbs

Description :

1⁄4 inch Mono TRS Jack input. A maximum 3m/10ft instrument cable need to be used. Always use a low noise high quality cable to avoid unexpected hum.

Active and Passive pre-amp switch. It would let you choose whether you are using an active or passive bass.

This is the selector switch between clean and overdrive. This pre-amp switch works on both passive and active channels.

This gain control works on the clean channel for both active and passive basses, and also on the overdrive channel for both active and passive pre-amps. Gain control needs to set at 50% maximum should work for most of the bass guitars.

This volume control works on the clean channel for both active and passive basses, and also on the overdrive channel for both active and passive pre-amps. N.B. pre-amp volume level should be as same as the maters volume.

3 band equalizer control. It’s an active equalizer, so the response is huge. It is not recommended to use in its maximum power. The equalizer responses upto ±10dB on bass, mid and treble. Follow the user manual’s recommendations.

Martina 12 has 2 x 3.5mm stereo channels. The left one can handle upto 1dBV (stereo) auxiliary input. Volume of auxiliary input needs to control from the source. The right one delivers sound to headphones or recording input and can deliver upto 450mW to 45Ω load.

This is master volume which controls the main power amplifier’s sound, that means it works for speaker only. It won’t effect on headphone output. N.B. pre-amp volume level should be as same as the maters volume.

Additional information:
Power Switch: Martina 12 has a power switch with a red light indicator.
Back panel:
Power Socket: The power cable is removable from the amp and would be needed to change in case of damage. Inside the power socket there is a fuse, which is also removable. (You need to change the fuse in case of damage.)
Speaker Out: There is a 30 watt speaker output. This is an external speaker system, so you can power up any speaker cabinet you want, when the main inner speaker will cut off.

Warranty :
⚠️ Every Martina 12 product comes with 90 days’ warranty period. For any kind of circuit failure, the warranty will protect your money. But in some cases that won’t be applicable. Let us explain; in case of burns, broken parts or any repair being undertaken; that will void the warranty.

Electronics are very sensitive products. A slight mistake could cost you an amp; voltage fluctuation, overheat, Humidity or loose connection anything can cause a faulty current situation. In these cases, an amplifier would be needed to repair.

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