running 4 ohm B&O s from 6-8 ohm marantz

conor4 · 26th June 2008, 09:47 PM

hi,

for the last year i have been using my PM50 to power my B&O beovox 3800s

the amp is rated at 8 to 16 ohms and the speakers are rated at 4 ohm

is it possible i might be damaging the amp or would i benefit from having a 4 ohm capable amp?

i have listened to it quite loud at times any i dont think there have been any problems yet but i really want to make the amp and speakers last for a few years to come.

the amp is 80w/ch RMS and the speakers are 50 watt (90 peak)

i know this isnt really diy at all but i was hoping you guys could help me out.

Thank you.

Iain McNeill · 26th June 2008, 10:10 PM

Don't know the Marantz personally but they're well respected and have been around for a while. I reckon they're up to a challenging load.

I wouldn't play them too loud but for moderate (normal) listening levels you're probably OK.

The amp won't be able to deliver enough current at high levels and will clip which could put excessive power into your tweeters. Watch (listen?) out for distortion.

nigelwright7557 · 26th June 2008, 11:40 PM

Quote:

Originally posted by conor4
hi,

for the last year i have been using my PM50 to power my B&O beovox 3800s

the amp is rated at 8 to 16 ohms and the speakers are rated at 4 ohm

is it possible i might be damaging the amp or would i benefit from having a 4 ohm capable amp?

i have listened to it quite loud at times any i dont think there have been any problems yet but i really want to make the amp and speakers last for a few years to come.

the amp is 80w/ch RMS and the speakers are 50 watt (90 peak)

i know this isnt really diy at all but i was hoping you guys could help me out.

Thank you.

You can run amps into very low ohm speakers so long as you dont turn them up too far.
I have used speakers down to 1 ohm with my MOSFET power amp.

conor4 · 27th June 2008, 02:47 PM

cool , thats what i wanted to hear! i might get a new amp anyway because the marantz sounds really nice on my wee mission speakers i have.

Thankage.

26th June 2008, 09:47 PM	#1
conor4 diyAudio Member Join Date: Jun 2008	running 4 ohm B&O s from 6-8 ohm marantz hi, for the last year i have been using my PM50 to power my B&O beovox 3800s the amp is rated at 8 to 16 ohms and the speakers are rated at 4 ohm is it possible i might be damaging the amp or would i benefit from having a 4 ohm capable amp? i have listened to it quite loud at times any i dont think there have been any problems yet but i really want to make the amp and speakers last for a few years to come. the amp is 80w/ch RMS and the speakers are 50 watt (90 peak) i know this isnt really diy at all but i was hoping you guys could help me out. Thank you.

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26th June 2008, 10:10 PM	#2
Iain McNeill diyAudio Moderator Emeritus Join Date: Oct 2007 Location: Santa Cruz, California	Don't know the Marantz personally but they're well respected and have been around for a while. I reckon they're up to a challenging load. I wouldn't play them too loud but for moderate (normal) listening levels you're probably OK. The amp won't be able to deliver enough current at high levels and will clip which could put excessive power into your tweeters. Watch (listen?) out for distortion.

27th June 2008, 02:47 PM	#4
conor4 diyAudio Member Join Date: Jun 2008	cool , thats what i wanted to hear! i might get a new amp anyway because the marantz sounds really nice on my wee mission speakers i have. Thankage.