7050b questions. - Forum

Hi,

I'm about to take delivery of a 7050b sub and I have a couple of questions after reading all the online manuals etc. If anyone can help I'd be most appreciative.

I'm using the set up without LFE and as a standard stereo set up.

I will be using the sub with 1029a monitors, should the default input sensitivity be set to zero?

Hi,

The subwoofer's input sensitivity should be set so that the output level is matched with the main speakers. Usually if the mains are set to max gain, the correct input sensitivity for the subwoofer is somewhere between 0 dBu and - 6dB. The exact setting has to be tested by playing known material through the system or measuring the frequency response of the system with calibrated gear.

The manual talks of running an 85hz sine wave to set up the phase toggles; when connecting the sub and a single monitor to do this does it matter where the HF monitor is? Will the HF monitors position (whether it be left, right or centre) make a difference to the calibration?

Yes, it definitely matters where the monitor is because the phase is affected by the physical location of both the monitor and the subwoofer. Usually it's recommended to calibrate the phase with the centre channel speaker, but since you have a stereo configuration, I'd calibrate it with the nearest speaker. You can of course try both options and see which on gives the best overall result.

I am working in a room where I only have the option to have my system 10cm away from the wall? What are the reccomended settings for the sub in this situation?

The input sensitivity and phase should be set as advised, the bass roll-off is more trickier because it's hard to give any recommendations without further details of the room (measurements, construction materials etc.), but usually 7050B doesn't need much bass roll-off in typical rooms. If the very low frequencies seem too overpowering, you should try to adjust the bass roll-off setting.

The bass roll-off setting on the main monitors should be enabled if there is a subwoofer in the system.

Are the main monitors also 10 cm away from the wall? If so, you should also enable the bass tilt setting; usually -2 dB or -4 dB works well.

Does the sub need decoupling from my wooden floor or is it already built in like the Isopod feature?

The subwoofer doesn't have an Iso-Pod-like decoupling feature, but it's built very well and is quite heavy for its size, so usually it doesn't need any decoupling even on wooden floors. If you feel that there are too strong vibrations transmitted through the floor, you should try a rubber mat underneath the subwoofer.

Hi,

Thanks for your in-depth reply!

I havn't used any calibration gear before so I guess it's a case of using my ears.

Cheers,

BH.

HB,
For myself and other 7050B users/owners, can you tell me what your sub's settings are for the sake of comparison?

My 8020's are set to -4dB bass roll off and sub's sensitivity is -4dB without any roll of switches engaged.

Not by choice, I'm in the corner of a 20x20 room with the monitors at 36inches apart 3 inches from the wall and the sub is at my side 36inches from the corner 3 inches from the wall.

Hey,

Well, I am slightly confused.

I have my 1029as set with the standard 85hz crossover switch engaged with no bass roll off.

My 7050b is set at (and here's my confusion) either +3db or -6db depending on which end is the pointer. I don't know if it's the flat end of the end that the ridge points to??? I also have the sub set with -4db bass roll off to.

Sadly I'm against a wall and the sub is near the corner so the room modes are wacky. I have some Rockwool traps but I think they are dealing mainly with the mid slapbacks.

2530G, you say you have your 8020s set with -4db roll off, do you mean the 85hz crossover or are you rolling your monitors bass off as well.

Do the bass roll of switches make any difference when the 85hz switch is engaged on the high frequency speakers?

BH.

sorry for the long delay in answering ....

Yes I have the -4dB tilit engaged as well as the 85hz roll off.

Ilkka recommended that in his answer to you a few posts back by saying:

"The bass roll-off setting on the main monitors should be enabled if there is a subwoofer in the system.
Are the main monitors also 10 cm away from the wall? If so, you should also enable the bass tilt setting; usually -2 dB or -4 dB works well."

Correct me if I'm wrong.

Still a bit confused!

So on top of the highpass crossover the LF roll off also has some effect?

Was there any clarification on which end of the sensitivity knob I should take as the reading?

Not convinced my system is set up properly. When I'm in front of my monitors witht he sub the bass is tight. If I stand up in the same position the bass is full and subby.

BH.

The curved side is the one you should be concerned with for adjustment.....i think....

Hey Ilkka - don't you think it's time to step in and help those of us that are in need of definite answers?

2530G

...Hey Ilkka - don't you think it's time to step in and help those of us that are in need of definite answers?

2530G

He's on vacation...