A PA amplifier usually takes the form of a 19" rack-mounted box. Most modern amps are in 2U boxes unless they are very high-powered (over 1kW per channel into 4 Ohms), in which case the box may be 3U or even 4U.
Most modern PA amplifiers use transistors to convert the signal from low to high power. Typically the work is shared by a number of transistors (a dozen or more in most cases), and these can get very warm when the amplifier is running at full power. For this reason, power amplifiers in PA systems are almost always fitted with cooling fans and ventilation slots.

These professional V series amplifiers, provides from 2X1500W respectively at high efficiency are well recognized by various users.
A massive transformer based power supply and hand selected components make these power ratings possible with exceptional audio quality and absolute reliability. The output stages are fully protected against over temperature, short circuit, RFI and equipped with soft start circuit and fan cooling. The activity of a protective circuit, signal and limiter is shown for each channel by LED’s.They are suitable for small to medium size applications, such as disco club, KTV, conference application, etc.

Specification
Power out put:1500W(8 ohm) ,2250W(4 ohm)
S/N Ratio :≥118dB
Slew Rate: 95V/uS
Damping Factor: ≥250
Freq Response :20Hz-20KHz, ±0.5dB
THD :≤0.5%,1KHz,1/3Rrte Power,8Ω
Input Impedance: 10K ,BALANCE/20K Ω,UNBALANCE
Indicators: ACTIVE,SIGNAL(-40dB),CLIP(PEAK),PROTECTION
Weight: 16.5kg
Product Size:482W×375D×88H

These professional X-series stereo power amplifiers, provide 2X800W respectively at high efficiency are well recognized by various users. A massive transformer based power supply and absolute reliability,even in the 2 ohm mode. The output stages are fully protected against over-temperature, short circuit, RFI and equipped with soft start circuit and fan cooling. The activity of a protective circuit, signal and limiter is shown for each channel by LED’s.

Specification
Stereo:800W (8 ohm) ,1200W(4 ohm)
Bridged:2000W (8 ohm) ,2400W (4 ohm)
S/N Ratio:106db
Slew Rate:80V/us
Damping Factor: 550:1
Freq Response: +/- 0.1db, 20Hz-20KHz
THD: ≤0.01% Rated power@8 ohm 1KHz
IMD: ≤0.01% Rated power@8 ohm
Input Sensitivity:0.775V, 1.0V, 1.55V
Low Pass: 20Hz-180Hz Valid
High Pass:130Hz-20KHz Valid
Input Impedance:10K/20K ohms, unbalanced or balanced
Weight:23kg
Product Size:483W×490D×88H

Mic1 input by combined connector of 1/4" phone jack and XLR with phantom power, Mic23 by 1/4" phone jack, Aux1 input by dual RCA, tel input by phoenix connector. Line output by dual RCA type. Mic with Vox priority (with Vox level control) and telephone input with secondary input over all other inputs. 100V, 70V and 416 ohms speaker output. AC 120V or 230V operation. Mic13, Aux1, tel, master volume control and bass/treble tone control. High temp, short circuit and over load protection.

Specification
Power Output :120W
Speaker Outputs:70V, 100V & 4~16Ω
Output Sensitivity & Impedance:LINE OUT: 1V/470Ω, Unbalanced RCA output
Tone:Bass: ±10dB, Treble: ±10dB
Frequency Response:50Hz~16KHz (+1dB, -3dB)
S/N Ratio:MIC: 66dB, AUX: 80dB
THD :Less than 0.3% at 1KHz, 1/3 rated power
Muting Function:MIC 1 overrides other input signals with 30dB attenuation
Phantom Power:+48V
Weight:7.8kg
Dimensions :484x303x88mm