Terry wrote on Mon, 15 February 2010: |
Just wanted to get your opinion on the BH760 or SB1000. Currently we have 6 BH760 in pairs under the stage at our church. I have never been happy with the sound we have been able to get out of them. To me they don't have much low end punch. From what I have read, these are supposed to have plenty of punch. We are powering each pair with a Crown Cts2000. I am thinking about switching over to the SB1000. I have heard these subs and have liked what I heard.
Anybody have any opinions? Or any recommendations for the BH760's or another sub that you like better than the SB1000?
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Hi Terry - I have spent quite a bit of time with the BH760 and that sub has all kinds of punch and low end. It's quality of sound can definitely be improved with a 2 or 3dB cut with a BW of .5 or Q=2 at 74Hz. IMO, you should also place a 4th order Linkwitz Riley low pass filter right around the same frequency to get most of the "horn" sound out of it. EAW's recommended processing spec's for high pass and the two parametric EQ settings should be followed in addition to my suggestions.
Fact: if any of my suggestions above are not already implemented (I'm sure they are not obviously), you will change the phase and/or magnitude of the subs' alignment with your top cabinets. If they are aligned properly at present, my cure would make the patient even more sick unless you know how to align a complex system like you have. If you're not sure about this and the budget is there, it would be very wise to call in someone who is experienced with this sort of thing. Yep, I'm offering.
Another glaring issue is that the poor subs are way underpowered. Generally you should try to have amplifiers that have twice the long-term output power as the sub's rating. Those subs are rated at 1,600 watts at 4 ohms long-term and you are only suppling them with 1,000 watts. If you bridged those amps (and purchased 3 more so you'd have one per sub), you'd still only have 2,000 watts available. This would be a big improvement (if those amps function well in bridged mode), though it would be best to have 3,000 watts or more available.
Just getting the right sized amps might fix the problem. If you can afford it, it's a little better to get amps that don't need to be bridged to achieve the power of interest.
Here's a thought: The SB1002 is requires even more power than the BH760. Get amps that can do 3 or 4 thousand watts into 4 ohms (both subs have a 4 ohm rating) and see if that fixes it - or gets you close - proper processing is likely to get you the rest of the way there. If the larger amps don't fix it, they will be useful for the SB1002's if you go that route afterwards. There is that ugly possibility that the subs are positioned poorly - which is often not something you can modify. Clever delay and/or phase tuning of the subs relative to each other can skin most of that cat as well.