2 12 type r vs 1 15 type r

Which Type R set up do you guys think is better? I just need a little push in either direction. I am going to push this set-up with a 1200 RMS kicker amplifier @ 1 ohm. I want it to be SQL, not pure SPL. I think 1 15" would be better since it can hit lower notes yet I am worried about if it will be as loud as the 2 12".

kicker makes a 1 ohm stable amp? if so its not recent. Model plz?

woofer size has nothing to do with how low it will play. 8's will play just as low as 15's...its all about the enclosure. I would first look on how much space you are willing to give up. Type R's like BIG enclosures...I'd do atleast 2 cu ft per 12. Atleast 4 cu ft per 15.Custom Enclosure Design

aznboi3644 wrote: woofer size has nothing to do with how low it will play. 8's will play just as low as 15's...its all about the enclosure. I would first look on how much space you are willing to give up. Type R's like BIG enclosures...I'd do atleast 2 cu ft per 12. Atleast 4 cu ft per 15.

but for how many 8s you will need to keep up with 1 15 its just not worth it SPL wise. and most 15s are made to hit real low where not all 8s will. all subs have a Frequency Response range they will play. most 8s dont have as low of a Frequency Response as 15s. thats where every one gets the idea of 15s hiting lower. also 15s hit there peek SPL at a lower frequency then 8s. so yea some 8s will play low but there peek SLP will be at a higher frequency.

87 ramcharger eclipse CD5000 2 15" memphis M3 kenwood 900rms mono amps

99 dodge cummins diesel eclipse CD4000 1 12" memphis Mclass 800rms audiobuhn amp

djrankin004 wrote: kicker makes a 1 ohm stable amp? if so its not recent. Model plz?

KX1200.1 the model prior to the ZX line was 1 ohm stable.

As for what will best suit you the 12s could be a bit louder because you have more cone area. As said above the box tune and size will dictate your sound and output.

moparfan1234 wrote: aznboi3644 wrote: woofer size has nothing to do with how low it will play. 8's will play just as low as 15's...its all about the enclosure. I would first look on how much space you are willing to give up. Type R's like BIG enclosures...I'd do atleast 2 cu ft per 12. Atleast 4 cu ft per 15. but for how many 8s you will need to keep up with 1 15 its just not worth it SPL wise. and most 15s are made to hit real low where not all 8s will. all subs have a Frequency Response range they will play. most 8s dont have as low of a Frequency Response as 15s. thats where every one gets the idea of 15s hiting lower. also 15s hit there peek SPL at a lower frequency then 8s. so yea some 8s will play low but there peek SLP will be at a higher frequency.

Its about the enclosure. The "peek (lol sp?) spl has nothing to do with the subwoofer...it is dependent on the enclosure. Saying "most 15's are made to hit real low" is false...every speaker is different. 8 inch subs can have just as low of a "frequency response" as any 15...Again it is dependent on the enclosure. People who think 15's hit "lower" than 8's are noobs...its a FACT. Ask any KNOWLEDGEABLE audio installer/designer. You still have much to learn. I've gotten one 12 inch sub to play lower and louder than 15's I've heard. The "frequency response" that you see are made up figures from the manufactures. A subwoofer can play well below its Fs depending on the enclosure.Custom Enclosure Design

aznboi3644 wrote: Type R's like BIG enclosures...I'd do atleast 2 cu ft per 12. Atleast 4 cu ft per 15.

I have a question for you about this. I have heard many people recommend a fairly large enclosure for the Type-Rs. I have modeled up the Type-Rs in many different enclosures using BassBox and have not seen any major advantage from using a larger enclosure. I have also made many enclosures for the Type-Rs. I have used some designs with a larger volume and some with the smaller volume. People have seemed to like the smaller enclosures more from my perspective. The only difference I have noticed is that a larger enclosure gives slightly louder, deeper bass then a smaller enclosure. This is a very small difference. The disadvantage is a higher group delay then a smaller enclosure. So I was just wondering what you have seen as being an advatage for using a larger enclosure. I'm not trying to debate you on this or say you are wrong I'm just wondering your opinion.

The group delay is not noticeable between the different sized enclosures...the design plays a part. To me having a bigger enclosure gives better efficiency...also the the added output from the port can be adjusted with the port area. Type R's have a ridiculous mechanical power handling...so the bigger enclosure doesn't hurt. I've given my Type R 1200 watts free air basically (t-line) and it never complained. If I was use the Type R for more of an SQ install I would do around 1.5 cubes tuned to 33Hz. But if the space can be used I'll always go with the bigger enclosure for better efficiency because I never worry about the Type R having mechanical issues. I like big ported enclosures...Screw Hoffman's Iron Law I'll give up size lol. Also I will never install a Type R in a sealed enclosure...they sound horrible IMO...the roll off is way too high. Low end sucks.Custom Enclosure Design

i got a qestion. i got some 15" type Rs a few months ago used and they came with a prefab ported box that was 2 cubic foot and of corse i had to see how loud it really was. i hit 146.7 DB with them in my S10 blazer. that was with my kicker 1500.1 amp. now i heard some one say i needed to build a biger box so i looked all over and i found in an old post on here the specs for a 4 cubic foot ported box and i copyed it to ever detail. it seemed to be louder but it didnt sound as good IMO and when i finally tolk it back to see how much louder it really was the best i could get was 141.4DB thats with the same amp same head unit and i had to turn the amp up just a tuch. what gives? i feel i should of keep the smaller prefab box it did better. why?

Dear God... PLEASE make it stop! The voices...! <fetal position> I can't take anymore. </fetal position>It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."