Opinions please, bridged vs. bi amped
06-16-2006, 01:49 PM
#1
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Opinions please, bridged vs. bi amped
I have and Alpine MRV-F400 (40x4 4 Ohms @ 12V / 100x2 4 Ohms @12V) for the front speakers. Bought it new a long time ago and it's out lasted about 6 cars 
I know it's nothing spectacular, but it's all I have and I don't have the $ to upgrade.
Front speakers are Boston Acoustic SL60 comps.
The suppplied crossovers allow for either single or seperate input.
Additionally, I have an Alpine H701 processor that allows for active crossover on the comps.
I know it's not the greatest setup, but I'd like to get the most out of what I have, so any suggestions as to what way I should set everything up?
At this point I am leaning towards bi amping the components using the supplied passive crossovers. I'd like to be able to set the levels on the tweeters and mids independantly
I know it's nothing spectacular, but it's all I have and I don't have the $ to upgrade.Front speakers are Boston Acoustic SL60 comps.
The suppplied crossovers allow for either single or seperate input.
Additionally, I have an Alpine H701 processor that allows for active crossover on the comps.
I know it's not the greatest setup, but I'd like to get the most out of what I have, so any suggestions as to what way I should set everything up?
At this point I am leaning towards bi amping the components using the supplied passive crossovers. I'd like to be able to set the levels on the tweeters and mids independantly
06-20-2006, 08:24 AM
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Originally Posted by DARQ MX
You mean 2-channel amp?
06-20-2006, 06:03 PM
#11
Originally Posted by spark plugs.
i'd personally just get 1 2-channel amp with enough power for everything and let the B.A. crossovers do their job. boston acoustics makes pretty good crossovers (better than alpine's atleast)
You would, but you also have no clue what the 701 is and what it can do. A bi amped setup with active xovers would **** on a passive settup almost anyday.
06-21-2006, 06:52 AM
#12
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Originally Posted by Pearl96Max
If you have the 701 why not just run em active?
06-24-2006, 02:56 PM
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Originally Posted by nismos14
Dido? wtf.
Ditto?
Ditto?
Dido - Thank You ?I already answered the why anyway
Originally Posted by Jay_Alix
That's what I'd like to do, but to be honest, I wouldn't know where to start other than random semi educated guess for x-over points and slopes. I know enough not to have really low frequencies going to the tweeters, but I don't have the specs for what the passive crossovers use.
My experiences with Boston customer service have not been good in the past.
06-24-2006, 03:50 PM
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Here is Bostons thoughts on active crossovers:
Q. Can I use an active crossover instead of the supplied Boston crossovers?
A. Replacing the Boston passive network with an active crossover can be problematic. Each component in the supplied Boston crossover is factored into the total acoustic output of the system. When you remove it from the signal chain and directly couple the woofers and tweeters to an amplifier, you will be unable to exactly replicate the properties of a Boston system specific passive network.
Why?
The first point is that the typical active crossover does not allow nearly the flexibility of a passive design. The second point is that we often stagger or overlap the crossover points to achieve a flat response. The actual electrical crossover points for the woofer and tweeter however are generally asymmetric and different on all of the Boston components. Finding an active crossover that will allow you to adjust each of these points independently and tuning it correctly is going to be difficult but not impossible. Just as a note: designing a passive network takes our team of experienced engineers several months to complete.
You will get better performance from your system by paying more attention to the installation techniques and driver placement rather than pursuing the use of active crossovers. There is no substitute for proper speaker placement and solid installation.
Q. What are the crossover frequency and slope of my Boston car speakers?
A. We do not publish this information, as it doesn't tell you anything useful about the crossover. Even if you know the crossover point and slope, you still do not know the type of network (Butterworth, L&R etc) as there are hundreds of ways to develop a crossover. We could build 10 different networks all with 18dB per octave slopes and each at 3000hz and have each one sound very different. And that's not even taking into account for the fact that often our low pass and high pass sections of the network are at different slopes and don't share the same crossover point.
Someone asking us for a crossover point and slope is like someone asking Honda "How do I build and V-Tech and what is the best color?” It's not that we don't want to answer these questions; it's simply a case of there not being a simple answer. If you using an electronic crossover the passive number will not translate to active values (active crossovers to do not have to account for impedance curves). Experimentation is going to lead you to the proper set up for your system.
A. Replacing the Boston passive network with an active crossover can be problematic. Each component in the supplied Boston crossover is factored into the total acoustic output of the system. When you remove it from the signal chain and directly couple the woofers and tweeters to an amplifier, you will be unable to exactly replicate the properties of a Boston system specific passive network.
Why?
The first point is that the typical active crossover does not allow nearly the flexibility of a passive design. The second point is that we often stagger or overlap the crossover points to achieve a flat response. The actual electrical crossover points for the woofer and tweeter however are generally asymmetric and different on all of the Boston components. Finding an active crossover that will allow you to adjust each of these points independently and tuning it correctly is going to be difficult but not impossible. Just as a note: designing a passive network takes our team of experienced engineers several months to complete.
You will get better performance from your system by paying more attention to the installation techniques and driver placement rather than pursuing the use of active crossovers. There is no substitute for proper speaker placement and solid installation.
Q. What are the crossover frequency and slope of my Boston car speakers?
A. We do not publish this information, as it doesn't tell you anything useful about the crossover. Even if you know the crossover point and slope, you still do not know the type of network (Butterworth, L&R etc) as there are hundreds of ways to develop a crossover. We could build 10 different networks all with 18dB per octave slopes and each at 3000hz and have each one sound very different. And that's not even taking into account for the fact that often our low pass and high pass sections of the network are at different slopes and don't share the same crossover point.
Someone asking us for a crossover point and slope is like someone asking Honda "How do I build and V-Tech and what is the best color?” It's not that we don't want to answer these questions; it's simply a case of there not being a simple answer. If you using an electronic crossover the passive number will not translate to active values (active crossovers to do not have to account for impedance curves). Experimentation is going to lead you to the proper set up for your system.
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