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8040 with 7050B?

carlosjr, modified 13 Years ago.

8040 with 7050B?

Youngling Posts: 2 Join Date: 7/20/09 Recent Posts
Hello!
I somehow managed to get my self stuck with a pair of 8040:s and a 7050 Sub.

:oops:

The 7050B manual says it can only be used with 8020 or 8030. Can I try to make this setup work or is there a possibility of actually braking something? Anybody else tried this?

Thanks!
christophe-anet, modified 13 Years ago.

Re: 8040 with 7050B?

Jedi Knight Posts: 188 Join Date: 3/23/09 Recent Posts
Hello,

Thanks for your post and question. The 7050B has been designed to complement a pair of 8030A or 5 x 8020A/B. On the 8030A / 8020A/B there is one DIP switch (switch 2 - Bass roll-off) that sets the high-pass response of the loudspeaker to complement the low-pass energy (below 85 Hz) reproduced by the 7050B. In short half the filtering is done by the 7050B and half by the 8030A / 8020A/B. This why the perfect match exist for these two loudspeaker models.

In the case of the 8040A, the Bass roll-off maximum setting is -6 dB at 45 Hz (not 85 Hz as in 8020/8030) due to the much lower LF extension of the 8040A. So, if you set the -6 dB Bass roll-off on the 8040A (meaning you High-pass the 8040A), it will not properly complement the Low-Pass of the 7050B at 85 Hz.

The system will work and you will not break anything, but the response around the crossover region will not be smooth. Between 45 and 85 Hz you might have either dips or bumps in the response depending if you end up having positive or negative summing of the LF energy at the listening position.

Also, in terms of level calibration, the 8040As will produce more SPL so the 7050B can't cope with them at higher SPL. In other words you are limited to max SPL of the 7050B which is considerably lower than the max SPL of a pair of 8040As.

Best regards,
carlosjr, modified 13 Years ago.

Re: 8040 with 7050B?

Youngling Posts: 2 Join Date: 7/20/09 Recent Posts
Hello!
Tried some things out and here is what I came up with.

The effect of my "studio" is much grater than the mixing of the sub and the main speaker signals. I measured the sub and speakers by them selves and the biggest dips and peaks stay pretty much the same. The biggest peak is at 49 Hz wich corresponds nicely to my appartment dimensions. 7m :-) wide. It can be seen in all measurement, with or without the sub.

I adjusted the output of the sub firts by measurement but later I added a few dB because it sounds nicer. I know people like hearing bass a bit "hot" and its not ideal for mixing but as long as I'm aware of this I think it's ok.

Thanks again!
wheelie, modified 11 Years ago.

Re: 8040 with 7050B?

Youngling Posts: 1 Join Date: 1/6/11 Recent Posts
I am in the same situation with a 8040 and a 7050....

I have an Ergo, which can be set-up to deal with the crossover of satellites and a sub...

Would this work for 8040 and 7050 combination? It was mentioned in the previous post that the sub deals with half of the filtering and the satellites with the other half? would this make a difference when dealing with the crossover using the Ergo?

What sort of crossover frequency would you recommend? And what settings for the dip switches on both the 8040 and the 7050?

Thanks
ilkka-rissanen, modified 11 Years ago.

Re: 8040 with 7050B?

Yoda Posts: 2564 Join Date: 3/23/09 Recent Posts
Hello,

It is not recommended to use any external devices to process the crossover function because the end result will be unknown. Also the 7050B is too small subwoofer for the 8040As which will severely impair the maximum SPL capability of the system. You will need at least 7060B subwoofer for the main speakers you have.