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GPM-250
250W mono channel, class-D / high power amplifier for subwoofer

GPM-250, a 250-watt plate type power amplifier of mono channel, is created for integration with subwoofer speaker for optimum bass / ultra-low sound effect performance in an audio system.

The GPM-250 adopts high efficiency switching mode power supply for driving speaker through its digital/ class-D amplifier, ultimately allows compact size and low weight for not just itself but also the integrated speaker system.

 

 

 

Incorporating the latest DSP technology, the GPM-250’s built-in CPU provides capability of adjusting and storing the amplifier’s working parameters through a notebook computer (via the USB aperture) or with the supplied remote control unit during installation and acoustic refinement.

(see table below for DSP functions)

feature highlight

- 250 watts, mono channel
- class-D digital format
- CPU-control DSP
- switching power supply
- remote setup and control
- power saving options

mode selection

subwoofer or LFE

volume / mute

set the sound level or defeat it

subsonic frequency

low-frequency filter setting (high-pass)

crossover

set up slope / frequency of crossover (low-pass)

phase / delay

speaker (subwoofer) location compensation

equalizer(6 presets)

tuning frequency response for refining acoustic result

night mode

limited sound level for listening in night time

power-saving selection

audio-trigger on-off selection / buffer-time setting

memory of functions

keep all the settings in the built-in CPU (up to 3 sets)

The GPM-250 is equipped with RCA jacks (the most commonly-used connector) and binding-post terminals (for connecting to high-level sources).
The binding-post connectors allow this device be connected to other amplifier’s or speakers’ ends (usually the satellite speakers), which are near-by this unit, therefore saves the cable for more neat installation.

Function

power on-off control

master switch

yes

remote control

IR handset / audio-trigger

power input

voltage selection

manual switch

cord

detachable (IEC type)

audio terminal

input

RCA (line) / Binding-post (high-level)

output

na

external control tool

remote handset

IR (handset included)

computer

USB / type B (cable included)

display

power

LED

Specification

max Power

THD @ 1%

W

250

THD+N

output @ 10W

%

< 0.2

input sensitivity

Line:  volume @ max

mV

200

High-level:

V

2.50

frequency response

LFE mode

Hz

2K

crossover (subwoofer) mode

Hz

variable (default: 80Hz)

crossover (low-pass) filter

range

Hz

40~160

slope

dB

12 ~ 36

subsonic filter frequency

range

Hz

16 ~ 40

slope

dB

24

phase adjustment

degree

0 ~ 315° (by 45°)

delay time

ms

0 ~ 30

S/N ratio

@ rated power

dB

> 100

auto-off time

min

5 ~ 30

auto-on level

mV

3~5

measurement

dimension (H x W)

mm

 

weight

kg / lb

 

operational AC range

(manual setting)

V

110~120

220~240

power consumption

standby, no-signal

W

0.5

power-on, no signal

W

20

rated power

W

350






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