продукта - 
Hertz DP 4.400 4x75W HiRes Amplifier
Кратко описание:
4-канален компактен AB-Class усилвател с повишена мощност и HiRes производителност
Подходящ за работа с до 4 чифта тонколони или 2 чифта + субуфер
Честотна лента: 10 - 45 000Hz
Изкривявания - THD @ 100 Hz, 70% Rated Power 0.01%
Дъмпинг фактор @ 1 kHz, 1W 130
S/N ratio (A-weighted @ 1 V Input) 100 dB
Цена: 349 лв.
Output power (RMS) @ 1% THD:
4Ch @ 4Ω 75 W x 4
4Ch @ 2Ω 105 W x 4
3Ch @ 4Ω 75 W x 2 + 210 W x 1
3Ch @ 2Ω / 4Ω 105 W x 2 + 210 W x 1
2Ch @ 4Ω 210 W x 2
Output Power (RMS) @ 14.4 VDC, THD 10%:
4Ch @ 4Ω 90 W x 4
4Ch @ 2Ω 125 W x 4
3Ch @ 4Ω 90 W x 2 + 250 W x 1
3Ch @ 2Ω / 4Ω 125 W x 2 + 250 W x 1
2Ch @ 4Ω 250 W x 2
Total Power 1000 W
Minimum load impedance
@ 4 Ch: 2 Ω
@ 3 Ch: 2 Ω + 2 Ω + 4 Ω
@ 2 Ch: 4 Ω
Adjustable Crossovers yes
Inputs Pre-In / Speaker-In
Pre Out Full Range (Front)
Pre-In sensitivity 0.32 ÷ 8 VRMS
Speaker-In sensitivity 1.6 ÷ 40 VRMS
Front Ch Hi-Pass Full / 50-4000Hz 12dB/Oct.
Front Ch Lo-Pass Full / 50-4000Hz 12dB/Oct.
Rear Ch Hi-Pass Full / 50-4000Hz 12dB/Oct.
Rear Ch Lo-Pass Full / 50-4000Hz 12dB/Oct.
Bass Boost 50Hz 0 ÷ 9 dB