MA Audio HK401SX Opinions

[bigt 10+ year member]

Im looking for peoples opinions on this amp and MA audio amps in general... ive researched and found them to be pretty good for the price, but i dont know if those people who reviewed it, are just regular people that dont know crap. PLease just give your $.2

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[yacob.naif 10+ year member]

the AB amps are rated at 17v, but from what i read they will do rated power.

That amps gonna be less efficient than the hk4000d, however.

and im not sure if it applies to the AB amps or not, but i know with the hk4000d, you need to run your remote wire to a relay, and run a 12v wire straight from your battery to the amp.

 

[bigt 10+ year member]

Sorry, im somewhatof a newb, but whats the difference with 17v, and also is the AB just different efficentcies ? because I know D is the most efficent? I am comparing it to a hifonics bxi2600d and I can get them for the same price so please fill me in. Here are the specs....

MA-$300

* RMS Power Range : 500-1800 Watts

* Number Of Channels: 1

* Low Frequency response: 20 Hz

* High Frequency Response: 20000 Hz

* Built In Crossovers: Yes

* Channel Separation: Yes

Features

* 500W X 1RMS @ 4 Ohm Mono Power Handling

* 650W X 1RMS @ 2 Ohm Mono Power Handling

* 1200W X 1RMS @ 1 Ohm Mono Power Handling

* 1800W X 1RMS @ 0.5 Ohm Mono Power Handling

* Frequency Response: 20-20kHz

* 40-250Hz Variable High Pass Crossover

* 40-250Hz Variable Low Pass Crossover

* 24dB Subsonic Filter

* Impedance: 10 Ohms

* Channel Separation: 60dB

* 0-18 dB Variable Bass Boost

* S/N Ratio: >90dB

* Digital LCD Display (Voltage, Temperature & Output Level)

* Platinum Plated Connections

* High Quality Power & Protection LED?s

* Quiet Fan Cooling System

* Thermal / Short / Overload Protection Circuitry

* Remote Bass Control

Hifonics-$340

* Super D-Class Monoblock Amplifier

* RMS Power Ratings:

o 1 ohm: 2000 watts x 1 channel

o 2 ohms: 1300 watts x 1 channel

o 4 ohms: 650 watts x 1 channel

* BXi AccuCross™ active electronic cross-over permits full adjustment of:

o Bass EQ, Subsonic Filter, Low-Pass & Phase Shift features

* RCA Input level control permits matching the amplifier input level (gain) to the CD/Receivers output level. Or the Balanced Input will accept BLD Line-Driver levels from 4 to 18-volts.

* The Brutus BXi bass remote controls the subwoofer output signal from the drivers seat.

* For multi-amp daisy chaining, the RCA line inputs transfer the pure untouched audio signal directly to the line output RCA jacks, bypassing any crossover settings

* Hifonics New Illuminated Heat-Sink Design With Blue LED Light Pumps

* Hifonics Blue Illuminated Logo

* Maxxsonics Illuminated "M" End Panel Logo

* Heavy-Duty Ultra-Fi™ MOSFETS

* Highly Efficient Super D-Class Amplifier Circuitry With Oversized MOSFET Output

* Fully Adjustable Accu-Cross™ Crossovers

* ±18dB Variable Bass Equalization @ 45Hz

* 180° Variable Phase Control (15 to 35Hz)

* Dash-Mountable Bass Remote Control Included

* Variable 24dB Subsonic Filter

* Brutus Pulse Wave Modulated MOSFET EXVP (Exponential Vari-Power Supply)

* Twin-Turbo Torroid Coil Design

* HSMD Hifonics Surface Mount Design

* Balance Line Inputs for our 18-Volt Line Drivers

* RCA Line Output for Amplifier Daisy Chaining

* Gold Oversized 2-Gauge Power Connectors

* Dimensions: 16.50"L x 10.39"W x 2.63"H

* 1-year Sonic Electronix warranty

Amplifier Specifications:

* Number of Channels 1 - Mono

* RMS Power (4 ohms) 650 watts x 1 chan.

* RMS Power (2 ohms) 1300 watts x 1 chan.

* RMS Power (1 ohm) 2000 watts x 1 chan.

* Bridged RMS Power Not Bridgeable

* Peak Power Output N/A

* Min. Impedance Unbridged 1 ohm

* Min. Impedance Bridged Not Bridgeable

* THD @ Rated RMS Power

* Speaker Level Inputs Yes

* Amp Preamp Outputs Yes - 1 Pair

* Built-in Crossover Yes - LP

* High-Pass Crossover N/A

* Low-Pass Crossover 35 - 250 Hz

* Subsonic Filter 15 - 50 Hz

* Signal-to-Noise Ratio >95 dB

* Channel Separation N/A

* Bass Boost 0 - 18 dB

* Bass/Gain Remote Yes

* Fan Cooled N/A

* Fuse Rating N/A

* Warranty 1-year SE

 

[davesexplorer 10+ year member]

I'd get the hifonics unless you need to run at .5 ohm.

 

[yacob.naif 10+ year member]

the hifonics will run at .5 ohms.

wont do 2000w even at 1/2 ohm, tho.

i'd take the MA, to be honest

 

[questionaire 10+ year member]

How accurate are the M1900xe an other(monos) in its class???

 

[yacob.naif 10+ year member]

they just guess.

 

[questionaire 10+ year member]

they just guess.

So thats a negitive. Do you think HK1998 will run at 1ohm?????

 

[Flipx99 5,000+ posts]

I used to have the HK1997 and it will not do 1 ohm. It goes into protect very easily.

EDIT: According to onlinecarstereo.com, it will play at 1 ohm

 

[dbman150 5,000+ posts]

i have 4 of the 401 and run them at .5 al day and burp at .25 very good amps needs a lot of power i have 8 runs of 0 to them the 4000 are a very good amp also but 180 draw and must people well never see the full 4000 unless you up grade ele system the 801 are also a very good amp i am going to run 2 of them next year.3600 rms each

 

[davesexplorer 10+ year member]

I used to have the HK1997 and it will not do 1 ohm. It goes into protect very easily.
EDIT: According to onlinecarstereo.com, it will play at 1 ohm

I had two hk1997's going strong in my old 95 explorer, both at 1 ohm resting, maybe my rise took it high enough, but they worked fine. 2 batts though.

 

[yacob.naif 10+ year member]

So thats a negitive. Do you think HK1998 will run at 1ohm?????

honestly, i don't even remember why i typed that.

i doubt you'd be able to tell the difference, honestly.

 

[questionaire 10+ year member]

honestly, i don't even remember why i typed that.
i doubt you'd be able to tell the difference, honestly.

You mean barely tell the difference between Mi class(M1900XE) an HK(1000D)?? Are the Mi rated at 17v?

 

[yacob.naif 10+ year member]

i think they're both rated at 17v.

i know snoopdan testifies that the hardkore amps do rated power, but i've never heard anyone say one way or the other about the mi's......

i'd stick with the hk's if you want to KNOW you're getting at least close to rated.

i just don't think there'd be a SQ difference.