MK6925 2×250W Stereo Pre-amplifier

Name: MK6925 2×250W Stereo Pre-amplifier
Brand: Guangzhou DSPPA Audio Co., Ltd.

Features

● With 4 microphone inputs with options of balanced or unbalanced input.
● With 3 audio (stereo) inputs, and 2 audio (stereo) outputs. With volume and bass and balance adjustment for audio input;
● Can play MP3 by USB.
● With master volume adjustment;
● With rated power 2×250W/8Ω for each channel when one channel runs alone;
● With DC output protection, overload protection, short circuit protection and overheat protection for power amplifier;
● With individual level and protection indicators for the Left channel and Right channel;
● MP3 infrared control

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Introduction
Specification

MK6925 amplifier integrates balancing function and pre amplifier and post amplifier. The series is equipped with three sets of stereo sound source input ports, four microphone input ports, a stereo line output ports, a recording output port and two groups of amplifier output terminals.3-way stereo sound source channels’ volume can be controlled independently cooperating with function of “choose 1 out of 4”. Four mics can be controlled independently. Volumes of amplifier output are controlled together. Equipped with seven equal sections, output volume is adjustable.

This product is more user-friendly designed. It adopts innovative technology and produces powerful, beautiful sound. Its functional operation is clear at a glance. At the same time, the product is designed for conference, sound volume is adjustable. Besides, it has multiple protection and enough function, stable and suitable for conference, background music, Karaoke, audio-visual and family engineering support.

Model	MK6906	MK6920	MK6925
Microphone input sensitivity	5 ± 0.5mV		4.5±0.5mV
Line input sensitivity	250 ± 50mV
MP3 input -10dB / 1KHZ sine wave	Output 23V	Output 32V	Output 45V
Line output voltage	950 ± 150mV
Total harmonic distortion	≤0.5 (1KHz, normal working conditions)
Line frequency response	20-20k Hz (± 3dB)
Microphone frequency response	80-20k Hz (± 3 dB)
Microphone 7 balanced	64HZ: ± 12dB
	160HZ: ± 12dB
	400HZ: ± 12dB
	1KHZ: ± 12dB
	2.5KHZ: ± 12dB
	6.4KHZ: ± 12dB
	15KHZ: ± 12dB
Line input and MP3 tone adjustment range bass	100Hz: ± 12dB
Treble	10KHz: ± 12dB
Signal to noise ratio (8Ω output)	≥75dB
Working power supply	AC220/ 50Hz
Phantom voltage	+ 48V
Rated power consumption	8Ω 60W	8Ω 120W	8Ω250W
Protective function	Overload, over temperature, short circuit
Dimension (L × W × H)	483x 310x 88 mm
Package dimension (L × W × H)	520mm×395mm×170mm
Gross weight	9.5kg	10.15kg	7.6kg
Net weight	7.5kg	8.15kg	5.6kg