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Amplifiers for Dynaudio BM6 Passive Monitors

Getting my options together as I'm looking to get a long overdue pair of studio monitors and I wanted ppls help on how passives work with amps.

I currently have >>> this one <<< connected to my DJ setup and it says it runs at 8 ohmns.

I was thinking of pairing it if I can with the Dynaudio BM6 passives.

But i'm not sure how ohmns work together as the BM6p are 4 Ohmns. You can drop ohmns can't you, would this work for this situation?

FJ


//Disco.on

Hi! In in the same situation as you. I'm buying the bm6p in a few weeks, and I'm gonna run them with my Harman Kardon hk970. It should be a good amp since its very neutral, and it has (like many other new amps) an eq bypass function. Even with the bass and treble settings set at 0dB, the eq section will color the sound slightly. And at 4 ohms it will feed the dyns 120watts RMS.

Back to topic. I suspect your amp is a 2 channel? No problem at all running each channel at 4ohms - it should be able to run at 2ohms per channel stable - if the amp is of decent quality.

edit: Your amp should be rather big to drive these. I suppose the bigger amp you give them, the better they will sound. 75 - 120 watts rms per channel @4ohms should be great. If your amp has the eq bypass function, it would be a real benefit aswell.

You can check a bit of it out on the link in my first post. It has space to connect four speakers at the back and runs at 8 ohms at 60w rms per channel and has a 'source direct' button which bypasses the EQ

Do you think it would work? No prob if not but it just adds a bit to the cost lol

4Ohm load on an 8Ohm solid state amp is... okay. WATCH for overheating and don't turn it up too loud for extended periods of time. Lower impedance in the speakers will increase current through the amp and it WILL get hotter.

2ohm load on 8ohm amp = way too much current. There are some amps that are built like tanks that can handle this, but I'd NEVER do it in regular practice. Pop goes the transistor.

quote:

It has space to connect four speakers at the back...

This is for speakers with seperate connections for the woofer and tweeter. My guess is you can disregard this feature (since I don't know your speakers).

Have fun!

quote:

Originally posted by Beyer it should be able to run at 2ohms per channel stable - if the amp is of decent quality.

I didn't really think about what I was saying here. This is not true.

It seems like we have a slight issue here. Of course when each speaker hhas 4ohm imp., the total load on the amp will be 2 ohms. And that kind of load is not for any amp to handle, like 3F05Q said. In my case, with the hk970 it seems to be fine - however with your amp I'm not sure. I tried to find as much info as I could - but I can't say for sure if you can safely do it.

edit: If you find out your amp is not 2 ohm stable, you could always sell it - and buy a NAD C352 for example. That's a really good option for these speakers. And oficially 2 ohm stable

quote:

Originally posted by Beyer Of course when each speaker hhas 4ohm imp., the total load on the amp will be 2 ohms.

The total load will still be 4ohms PER channel. Remember that each channel is independant.

Flutlicht, run your Dynaudios on your A5 and enjoy. Just remember to watch for heat and don't crank it up rediculously.

Sidenote:

Your speaker coils are just big inductors, so impedance, not resistance, applies. Remember that impedance is a resistance value that is a function of frequency, hence the units being 'ohms'. That being said, when identical speakers are used, we can use standard resistor properties:

Wiring two 4ohm speakers in PARALLEL on channel results in a 2 ohm load.

Wiring two 4ohm speakers in SERIES on one channel results in an 8ohm load.

Just some food for thought.

Think it would be best if I grab a new one ad use the Cambridge one for my DJ setup. Can't really think about spending �300 on an amp though as may as well get the active Dynaudios or a HR624 lol!

Was looking at the Samson range of amps which seem a little more sturdy and I can grab a 150w per channel one for �115. Are these an okay brand?

http://www.dv247.com/search/0/0/ProductPrice/Ascending/samson+servo/1/

I don't know much about the Samson brand, but it is really important that the amp is really well made - as you would compromise the sound from the speakers with less quality stuff. While this amp will deliver the proper amount of power to the speakers, the sound quality could be less than satisfactory. Especially with ultra revealing speakers like the dynaudios. At the end of the day, its a question of priority!

if that cambridge amp is rated at a 8ohm minimum speaker impedance then you dont want to put a 4ohm load on it. these types of amps are very cheaply made and will die quickly if shown current draw from a 4ohm setup. also the cambridge amp will have a terribly colourd sound. pick up a second hand 100watt rms pa amp from a company like peavey. the cambridge wont have nearly enough power to run those 4ohms effectively.

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