JMH AMPLIFIER is a class D amplifier with a final stage that offers a maximum power of 60W RMS on impedance of 4Ohm. Small, light, compact, it integrates a pre-amplifier in JFET technology.

The Pre-Amplifier in “cascode” technique proposes an amazing linearity of signal useful to guarantee great benefits of interfacing and transparency of the signal to other units. Tone Control includes three passive filters that act on the frequencies: 80Hz (low), 560Hz (middle), 5500Hz (high).

Power Stage employs a class D digital module with PBTL configuration. Although the connection of a speaker with an impedance of 4 to 8Ohm is possible. The best performance of power and linearity can be identified in 4Ohm.

CAUTION! The bridge ending provides exclusively direct connection to the cashier (NO NEGATIVE SPEAKER TO GND).


This equipment has been tested and found to comply with the limits for a Class D 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 not cause harmful interference to radio or television reception, you are encouraged to try to correct the interference by one or more of the following measures:
1. Re-orient or transfer the receiving antenna.
2. Increase the separation between the equipment and the receiver.
3. Connect the equipment into an outlet on a circuit different from that.
4. Consult the dealer or an experienced radio / TV technician.

Modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment in accordance with FCC rules.


BASS: Low frequency control
MIDDLE: Middle frequency control
TREBLE: High frequency control
MASTER: Output level control
PRE-AMP: Input Gain control


Power In

12 to 24VDC (Positive Tip)


Max 3A to 24VDC

Input Impedance

<1M Ohm

Input Level

Max 500 mV

Bass Frequency

110 Hz

Middle Frequency

720 Hz

Treble Frequency

4500 Hz

Max S/N Ratio


Max Power Out

60Wrms to 4 Ohm

Impedance Out 4/8 Ohm

BST performance to 4 Ohm


0.3kg (0.6 lbs)


120mm (4.7")


94mm (3.7")


45mm (1.770")


2022 Cicognani Engineering copyright all right reserved.