help please! amp/speaker question

[Joshua_j]

Hello everyone,

It has een a while since I have participated here, and my newborn is the reason. My first child likes to play with my amplifiers, so I have started to sell it all……

As such, I bought the Marantz mm8003 to go with my av8003. I actually like the Denon amps more than the Carver ones…..signal to noise ratio just much better and the background was pretty much silent on the Denons….

Anyways, the mm8003 is a 8 channel amp. I have 5 speakers. So, i want 2 channels each for the front 3 (total of six) and 2 for the back (to equal 8).

The manual describes bi-amping, but since i dont really believe that this will do anything and I would like more power than what is going to the speakers…… is it possible to do a sort of reverse bi-wire? ie. can i split the signal from lets say the RF (from the av8003 out) to 2 different channels on the amp and then connect both of those to the speaker? Would this be bad? Do I have to disconnect the interconnects and bi-amp them (thus getting the meager wattage to the highs and the bass separately) instead of leaving the interconnects and connecting both to the entire speaker (and to my thinking doubling the wattage and thus reserve to the entire speaker)…

 

 

Thank you all for your time.

 

Joshua

 

[PeterSt]

Hi Joshua,

 

Although not sure, I think what you suggest is not going to work (split at the preamp -> where is the (proper) xover ?).

 

But what would work (and which is fairly normal) is feed the main amp with two pairs of output from the preamp (you could do it with a Y connector), and next biamp to the speakers. That is *IF* the speakers accept bi-wireing which means a separate set of inputs for bas and mid-high. Now the cross-overs in the speakers will do the job, and you have a separate amp channel (thus more power) for the bass and for the mid-high.

 

I hope you can do something with this.

Peter

 

[Joshua_j]

Peter,

First, thank you for the response. The solution you have discussed is what is currently being done. Splitting the same signal from the pre-amp ---> 2 channels-----> bi-amp (mid/upper binding post + lower binding post). So 140 watts to mid/upper and 140 watts to lower. This uses the speakers own crossovers.

What I am asking is could I just split the signal from the pre-amp---> 2 channels----> and bi-amp for 280 watts to lower binding post? will there be some bad thing that happens such as an internal loop/ feedback that will blow the amp? Essentially a reverse bi-wire….. feeding 2 separate power signals to make one stronger power source for the speaker…… which i think would give much more dynamic headroom without clipping…..

I might be talking nonsense and not understand things correctly so before i ruin my equipment i am asking.

 

Thanks for your time.

Joshua

 

 

 

[PeterSt]

What will not happen in that case is that things will be louder, so to say. This is because you will be adding voltages, and they can't be added. However, I think the "power" as such will add up, and now it depends on whether you need that power (amperes). This could be about better control of the speakers.

I don't think you will blow something, but don't blame me if it happens after all (but keep the plus and minus in their proper way !).

 

Still there will be no real difference with normal bi-amping, which at least has the advantage of dealing with the individual feedback of the woofer to its own amp, vs the mid-high. Here too you will be feeding 280W in total and here too the music won't play louder. Also the impedance (relation) will stay as meant, which will not be so in the other situation (but it could be harmless).

 

Try carefully.

Peter

 

[Joshua_j]

For taking the time out of your schedule to respond. I won't try it out of fear for damaging the amps or worse……

Joshua