Question about Boston Acoustics

[sc197 10+ year member]

I'm looking into getting a set of Boston Acoustics Pro60, and they come with 4 crossovers. One for each midbass and tweeter. Would I need a 4-channel amp to power those, or a 2-channel?

I'm not sure if I want to go passive or active yet, I'm leaning more towards active so I can control the settings through the HU and not worry about using the crossovers. It just depends on whatever is the best way to get the best performance out of the speakers. Either way would I need a 4-channel or 2-channel?

Also, the RMS of the Bostons are 125wrms, is that for the pair or each midbass? (Total being 250wrms for both) I always thought it meant the pair but I asked around and everyone is telling me both answers, so maybe someone can help.

Now looking for an amp to power the Bostons, what kind of specs should I look into? (Example: If I was getting a 4-channel and both are 250wrms)

300wrmsx4 @ 2ohms.

Something like those specs? I always thought when it said 300wrms x4 it procudes 300wrms total using all 4-channels. But I've been told that it means 300wrms each channel. Can someone please tell me the correct answer?

The Bostons are 3ohms so if I got an amp that was somewhere around those specs, it would probably see around 200 something watts @ 3ohms. Correct?

I'm still a newbie when it comes to components but I'm trying to learn so sorry if those questions are retarded.

Thanks.

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[supraman1379 10+ year member]

Anyone? Cmon guys, for some reason he doesnt get too many replies, if any to alot of the threads he makes.

And Im curious about this too.

 

[sc197 10+ year member]

thanks man. i also made a thread in the "speakers" section hoping I'd get more replies but Echo really helped me out. I think I got my new set up pretty much figured out.

 

[wesl56 10+ year member]

I'm looking into getting a set of Boston Acoustics Pro60, and they come with 4 crossovers. One for each midbass and tweeter. Would I need a 4-channel amp to power those, or a 2-channel?
either

I'm not sure if I want to go passive or active yet, I'm leaning more towards active so I can control the settings through the HU and not worry about using the crossovers. It just depends on whatever is the best way to get the best performance out of the speakers. Either way would I need a 4-channel or 2-channel?

i dont really know about an active setup //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Also, the RMS of the Bostons are 125wrms, is that for the pair or each midbass? (Total being 250wrms for both) I always thought it meant the pair but I asked around and everyone is telling me both answers, so maybe someone can help.

dont know the specs, post em if you got em, but usually comp sets are rated per side

Now looking for an amp to power the Bostons, what kind of specs should I look into? (Example: If I was getting a 4-channel and both are 250wrms)

300wrmsx4 @ 2ohms.

depends on what kinda power those like... ive never really looked into them so just search around and see how many watts people are giving them

Something like those specs? I always thought when it said 300wrms x4 it procudes 300wrms total using all 4-channels. But I've been told that it means 300wrms each channel. Can someone please tell me the correct answer?

300x4 means 300 watts out of 4 channels

The Bostons are 3ohms so if I got an amp that was somewhere around those specs, it would probably see around 200 something watts @ 3ohms. Correct?

depends on the amp... would prolly be doing a little more than 4ohms output

I'm still a newbie when it comes to components but I'm trying to learn so sorry if those questions are retarded.

Thanks.

mmmkkk

 

[gatorgrizz27 10+ year member]

I would stay passive if i was you, Bostons Crossovers are awesome, and running active is a huge pain if you don't know what you're doing. You will still be able to change your high pass/low pass on your deck, just not the mid-tweet crossover. 2 ch or 4 ch amp depends on how you want to wire them. You might want to run a 4 ch so you can send a ch to each tweet and a ch to each mid, so you can feed the tweets less power (basically bi-amping them). This way if you choose to go active in the future you can. A 2 ch will work fine, but if enough power is sent to your mids for them to be happy, your tweets will most likely become harsh, and you cant run active in the future. The Pro's are 3 ohm, you can figure out the approximate power of an amp at 3 ohm by averageing the 2 ohm and 4 ohm numbers it produces. The 125 w power rating is for each side, (mid/tweet combo) not both sides. This number does NOT mean 62.5 w for the mid, 62.5 w for the tweet, they may see all 125 w depending on the frequency of the sound, but they will not both see 125 w at the same time. Also, for Bostons you want AT LEAST double the RMS rating. They love power and need lots of it to produce good mid-bass. My Bostons are rated 65 w RMS and are being fed 180 w, with no problems. Your speakers will never see the full power your amp produces as well, you can find more about that on here by searching. The 300x4 etc depends on each amp, you can only tell what it produces by looking at the power output at various resistances. Some amps are weird, like JL's. They may make 300 w at 4 ohms and at 2 ohms, when they theoritically should make 600w at 2 ohms if they make 300 at 4. In summary, i would go 4 channel amp, around 250w per channel at 3 ohms (300w at 4), run them passive, and set them mids where you want them, set gains with DMM, and then turn the tweets down if you want to. Hope this helps and is not confusing.

 

[T3mpest 10+ year member]

regulated power supply ftl!

 

[sc197 10+ year member]

I would stay passive if i was you, Bostons Crossovers are awesome, and running active is a huge pain if you don't know what you're doing. You will still be able to change your high pass/low pass on your deck, just not the mid-tweet crossover. 2 ch or 4 ch amp depends on how you want to wire them. You might want to run a 4 ch so you can send a ch to each tweet and a ch to each mid, so you can feed the tweets less power (basically bi-amping them). This way if you choose to go active in the future you can. A 2 ch will work fine, but if enough power is sent to your mids for them to be happy, your tweets will most likely become harsh, and you cant run active in the future. The Pro's are 3 ohm, you can figure out the approximate power of an amp at 3 ohm by averageing the 2 ohm and 4 ohm numbers it produces. The 125 w power rating is for each side, (mid/tweet combo) not both sides. This number does NOT mean 62.5 w for the mid, 62.5 w for the tweet, they may see all 125 w depending on the frequency of the sound, but they will not both see 125 w at the same time. Also, for Bostons you want AT LEAST double the RMS rating. They love power and need lots of it to produce good mid-bass. My Bostons are rated 65 w RMS and are being fed 180 w, with no problems. Your speakers will never see the full power your amp produces as well, you can find more about that on here by searching. The 300x4 etc depends on each amp, you can only tell what it produces by looking at the power output at various resistances. Some amps are weird, like JL's. They may make 300 w at 4 ohms and at 2 ohms, when they theoritically should make 600w at 2 ohms if they make 300 at 4. In summary, i would go 4 channel amp, around 250w per channel at 3 ohms (300w at 4), run them passive, and set them mids where you want them, set gains with DMM, and then turn the tweets down if you want to. Hope this helps and is not confusing.

Yeah that really helped out a lot. The only problem I have is finding a good amp that puts out 300wrms x4 @ 4ohms. I was looking into Diamond Audio amps but they were going for $500 or more on ebay //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif and that's a little out of my price range. I'd like to spend $300 max on a comp amp, maybe a little more if I have to. I currently have a JBL GTO1201 amp powering my subs (which I plan on getting better subs/amp later as well) and I really like the JBL amps all around. I was looking at this amp and seemed a little interested if it's good enough.

http://jbl.com/car/products/product_detail.aspx?prod=PX300.4&cat=AMP&ser=POS&language=ENG&country=US&region=USA

123.5wrms x4 @ 4ohms. Would that be underpowering them or would 123.5 be good enough to make them sound good? (If I don't really need all that power that you mentioned) If anyone has a better amp that would go good for those comps please feel free to leave some opinions. I'd like to stay in the $300-$400 range for the amp. I'm open for any sugestions.

I was also looking into the Kicker ZX850.4 that does 175wrmsx4 @4ohms and 215wrms @ 2ohms. I heard from a lot of people that Kicker amps are underrated so I'd be getting more power than what the specs say. Buuuut I don't know if the Kicker amps are good for SQ to make those Bostons sound good. The reason I was looking into that Kicker amp because I plan on getting a single 12" w6 in place of my 2 12" Kicker CVR's and a Kicker ZX400.1 in place of my JBLGTO1201 so I could have matching amps, which isn't a biggie if I don't end up with matching amps in the end, but I like the setups more when stuff matches.

Any feedback will help. Thanks

 

[sc197 10+ year member]

Anyone?

 

[FoxPro5 5,000+ posts]

My advice would be to NOT run them active.

Take the 4 ohm rating and multiply it by 1.33 to get the 3 ohm rated power. Ex. 200x2 at 4 ohms = 266x2 at 3 ohms.

There are many 2 channel amps that put out respectable power that the Boston's demand. What is your budget?? Can't go wrong with an Eclipse 34230....shit load of power (370x2 @ 4) and can be had at great prices used and even new if you can track one down. Downside is its size and the fact that it can't be bridged.

Others: MB Quart raa2400, Arc XXK2500, Kicker SX900.2, Zed Audio Deuce, Zapco Reference 750.2.

You can also get a 4 channel and bridge it to each side which might utimately be a better option down the road.