Running 8ohm speakers on car amp

 

New member
Username: Fadol

Bahrain

Post Number: 1
Registered: Nov-07
hi
i have home theater speakers which are rated at 8 ohm each and i have a kenwood car amp with a 4 ohm sup woofer installed ... i wanna try my home theater speakers wich are rated @ 8 on my car amp .. is that a good set up ? any draw back ? will they work with out breaking any thing ?


this is the amp specification


KAC-8401
4 CH Power Amplifier

Bridged Power Output at 14.4V (1kHz, 0.8% THD): 180 Watts x 2
Maximum Output Power: 640 Watts
Power Output at 2 Ohms, at 14.4V (1kHz, 0.8% THD): 90 Watts x 4
Power Output at 4 Ohms, at 14.4V (20Hz-20kHz, 0.08% THD): 30 Watts x 4
3-Channel Mode 2 X 60 RMS + 1 X 180 RMS
2-Ohm Stable
Power Input Terminals: Gold-Plated
Aluminum Die-Cast heat sink
Quiet Turn-On
RCA Audio Inputs: Gold-Plated
Speaker Connectors: Gold-Plated, Screw-Type
Speaker Level Input Terminals
Speaker Relay Protection
Line Output RCA terminals
Variable Low-Pass Electronic Crossover: 50Hz - 200Hz, 12dB per Octave
Variable High-Pass Electronic Crossover: 50Hz - 200Hz, 12dB per Octave
Bass boost (off/+6 @ 90 Hz)
 

Silver Member
Username: Talon01

12 audioque 2.5 145.2 ..., Pa Usa

Post Number: 382
Registered: Jun-07
i wouldnt the amp may give you problems tri mode you generally like all the same ohm load
 

Platinum Member
Username: Rovin

4 10 Pioneer...

Post Number: 12497
Registered: Jul-05
it may not fully power the home sub but i dont see any real harm being done ...
 

New member
Username: Fadol

Bahrain

Post Number: 2
Registered: Nov-07
i'm confused now :s
 

Gold Member
Username: Van_man

Boston South, MA

Post Number: 3103
Registered: Mar-06
Hook the subs up like this in the tri mode. It will give each sub about 90 wrms. and then you can run a set of speakers off the other 2 channels. Typicaly, bridge channels 3-4 for tri-mode. But read your manual on proper wirering.

http://www.crutchfield.com/learningcenter/car/subwoofers_wiring.html?imageID=2SV C%5F8%2Dohm%5Fmono
 

Gold Member
Username: N2audio

Lawrence, Ks USA

Post Number: 1417
Registered: Mar-04
Marc, that's not tri mode - it's 3 ch mode.
Tri mode is running 3 speakers off ch - one being 8 ohms. It's basically a useless feature IMO, any 2 ch bridgable amp can do it. To me it's just a line to add to the specifications of a budget amp.

Fadhel - running 8 ohm spkrs with a basic 4 ohm car amp isn't a problem, but the amp will only give you 1/2 the power since the resistance is doubled.
 

Gold Member
Username: Nd4spd18

Northwest PA

Post Number: 4146
Registered: Jul-06
And then there's the issue of durability, home audio speakers are not desgined to withstand the environment of a car
 

New member
Username: Fadol

Bahrain

Post Number: 3
Registered: Nov-07
i guess i will give it a try and see how it goes
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