i just recieved my amp in the mail today ....this little one has some serious testicular fortitude!! ive got it at 4ohms due to my speaker configuration and it is seriously movin......totally surprised me...
Replies (27)
ShootuhMcBustaCap on 04/21/2007 20:46:09
Yeah, the MRP-4M450 is a nice little piece there trunk. My brother runs one with an Infinity perfect 12DVQ sub in his bimer, and it does pretty nice. Would like to hear it off some real RCA's and lose the loc and stock head unit.
trunkisloud on 04/21/2007 22:39:03
yea i got it on 2 pioneer premier ts-w306 12's its doin fantastic...runnin off a panasonic CQ-C7413U pushin 5v preouts....it sounds pretty sweet..
ShootuhMcBustaCap on 04/22/2007 09:52:01
I bet. I want an Alpine amp bad. My first amp was an Alpine, and aside from the JBL I have now, was the only quality amp I ever had. It was a four channel though....
jamesp on 04/22/2007 22:16:29
TIL....How many watts are you giving each sub???
trunkisloud on 04/22/2007 23:37:43
not sure exactly.....its class d mono runnin at 4ohms....maybe 200
ShootuhMcBustaCap on 04/23/2007 09:35:54
The Mrp M450 runs 250 watts at 4 ohms, and 400 at 2. Kicks my wattage rating in the face....
jamesp on 04/23/2007 09:47:28
So if the amp puts actually puts out 250 watts at 4 Ohms, with 2 SVC subs wired at 4 Ohms each, does each sub get 125 watts or 62.5 watts. Based on this reply to my post, it seems that the answer would be 62.5.Or is it 125....Im confused.... Below is a reply to my question concerning 2 subs on a mono amp...If I can get an answer, Ill understand the situation...maybe.lol
*************************************************************************
"if you wire each of the VC's in series, you will have 4 - 4 ohm voice coils in series which means you add them all up. You would have a net impedence of 16 ohms. You will need to do a series parallel configeration with 2 in series, and 2 in parallel to get a 4 ohm load to your amp. That power will be divided equally between the VC's so if your amp puts out 300 watts at 4 ohms, you will have 75 watts per driver, and 37.5 watts per VC."
***************************************************************************
I dont understand why if my amp is good for 300 watts at a 4 Ohm load, why is it only putting out a total of 150 watts in the scenerio above
swez on 04/23/2007 11:05:14
That Alpine is rated pretty fairly. It was mentioned that it delivers 250 Wrms @ 4 ohms and 400 Wrms @ 2 ohms. That is pretty much the norm for a typical Class D sub amp.
Now, the amps power is linked directly to the resistive load it sees. If one used a pair of 4 ohm SVC's and they are wired parallel, that's a net 2 ohm load and each sub gets 200 Wrms. (This is optimal for this amp)
If we used a 4+4 DVC and wired both coils in parallel, that sub is now 2 ohms and would get 400 Wrms as well. (Just like your system now, only your amp is stronger and delivers over 700 Wrms @ 2 ohms)
When using a pair of 4+4 DVC's, we have two usable choices. (1 or 4 ohm loads, depending on how the subs are wired to the amp) In this case, the Alpine would deliver 250 Wrms @ 4 ohms. (125/sub) Not bad, but not optimal either. This amp is not 1 ohm stable and one would be ill-advised to try a 1 ohm load on this system.
If one wanted to get the optimal results with this amp and 2 DVC subs, each sub would need to be a 2+2 DVC. When wired series/parallel, the amp would see a net 2 ohms and deliver a full 400 Wrms. (200/sub)
Are you tracking with the concept now?
Swez
ShootuhMcBustaCap on 04/23/2007 11:11:19
If trunk's subs are 4 ohm DVC subs, it would be a series pallelel wiring. The voice coils in series (8 0hms each) and the subs themselves in parrelel. That would be a four ohm total setup and would net 125 rms per driver, and each coil at 62.5.
When you double ohmage, power typically halves. so at four ohms it would be full, half at 8 and a quater at 16. And so on. It is claimed by some that you get cleaner power and sound at higher ohmage levels, which is a great explanation of the difference in the usage of class D and say a 4 channel.
ShootuhMcBustaCap on 04/23/2007 11:12:10
Doh! Typing at the same time are we??
jamesp on 04/23/2007 11:30:40
****EDIT @ 11:57 EST .. yes, I finally see the light*****
I am closer but not quite there and I apologize for the denseness but:
Why will the Alpine take a 2 Ohm load with 2 subs, and my amp have to have a 4 Ohm load with 2 subs??
It seems like I could use a pair of Infinity Kappa 2+2 DVC subs with my amp and deliver 300+ watts to each.With a series/parrallel setup wouldnt each sub have 4 Ohms and then connect them to the 2 outputs on the amp which I have been told are wired in parrallel for a net 2 Ohms?? This would work , right??? 300+ watts to ea. Kappa 2+2 DVC would be optimal would it not??
jamesp on 04/23/2007 11:54:11
I looked at the other thread and didnt see your post and responded here. The Kappa 2=2DVC's would be the ticket if I want to change things around dont you think?/?
thanks for breaking it down. I just was not catching the fact that the your diagrams were showing series/series or series/parralel...just thought there was one diagram for each VC setup...Ill catch on .........................................eventually
ShootuhMcBustaCap on 04/23/2007 12:36:56
Well, the 2+2 Kappas would be the ticket, but unfortunately, Infinity has yet to bless us with any 2 ohm coils. They make single 4 and dual 4 apps only. The best thing here would be to use 2 single ohm coils.
jamesp on 04/23/2007 12:52:32
Shootah, are you saying to use 2 subs each with a single, 4 Ohm coil?... If I do it like that will each sub get 300+ watts?
The thing that is throwing me off is that my amp has 2 sets of speaker outputs, With my current single sub, I am only using one set of outputs and all of the sub wiring diagrams show only 1 set of speaker outputs on the amps...does that make sense?
jamesp on 04/23/2007 13:03:05
Shootah, I cant use 2, 2 Ohm speakers. The manual shows that when using 2 speakers, one on each of the amps 2 sets of outputs that they must be 4 Ohm minimum.
ShootuhMcBustaCap on 04/23/2007 13:08:56
I meant 2 single 4 ohm coils. My bad. I get what you are getting at with two sets of speaker outs. I have worked with a couple sub amps in the past like this.
If two single 4 ohm coil subs are used, each will get 300 watts from your amp, if it is 600RMS at two ohms.
jamesp on 04/23/2007 13:13:01
All right, I will look around and see wnat I ca score a pr of Infinity Kappa 4 SVC 12's for.
I really like my Kappa comps that I have up front.
ShootuhMcBustaCap on 04/23/2007 13:30:13
uh-oh he's goin in............Gotta love new projects..
swez on 04/23/2007 13:30:32
Yep, we are looking at a pair of Kappa 4 ohm SVC's here. In parallel, the amp sees a net 2 ohms. In my recollection, Infinity does not make a 2+2 DVC to date. So, we look for a pair of 4 ohms SVC's to get the job done.
Infinity and JBL are sister companies of Harman Intl. This company makes some top-flight gear for Pro, HT, Commercial and car audio. Have used JBL for years in Pro gear apps. JBL speakers and Crown amps are a great combo, if you like the sound they deliver. (I do) But it may not be every man's cup of tea.
After a few installs with JBL or Infinity aftermarket speakers and amps, am very comfortable to suggest/recommend them.
Swez
jamesp on 04/23/2007 14:45:18
I am totally happy with my Alpine R sub/amp combo but if I can find a sweet deal on a pair of the Kappas, that will give me something to do on a rainy weekend to keep me out of trouble.
I bought a big pair of JBL speakers in early 1975 when I put together my second home stereo system. No one had heard of them around here at the time but when I was in the stereo shop and heard them they were the best bang for the buck on the floor . I used and abused that system for at least 15 years before giving it all away to a friend. Those speaker cabinets weighed more than 50 lbs it seemed. In retrospect, I wonder how that system would compare to a system that cost the same today..beacuse then it was over 1200 dollars....big bucks...
jamesp on 04/23/2007 15:26:37
This is the only type of Infinity Kappa 4 Ohm SVC I can find and the sessitivity is 89 db..Crutch has a pic of a Kappa perfect with a sens rating of 96db but says it is no longer available...The search is on.
http://cgi.ebay.com/INFINITY-KAPPA-PERFECT-12-VQ-12-SUBWOOFER-12VQ-SUB_W0QQitemZ300102415938QQihZ020QQcategoryZ18803QQtcZphotoQQcmdZViewItem
jamesp on 04/23/2007 17:51:21
According to Crutchfield this sub has 2, 2 Ohm VC,s but...
Power Handling: The woofer has two 2 ohm voice coils internally wired together. The total power handling is 350 watts RMS, 1400 watts peak. There is no provision for wiring the voice coils individually.
What's Included
What’s in the Manufacturer’s Box?
» Download Owner's Manual
One 12" Woofer
Self-adhesive foam gasket
2.5mm Allen wrench
Instructions
Technical data sheet
Warranty and on-line product registration card
Window sticker
Top of Page
$199.99
Save to Wishlist
Infinity Kappa 122.7w
12" subwoofer with selectable 1- or 4-ohm impedance
trunkisloud on 04/23/2007 18:46:00
or.........you can score a pair of 2ohm dvc type r's....heres a link ...http://cgi.ebay.com/ALPINE-SWR-1222D-Type-R-12-DVC-2ohm-Subwoofer-Sub-1500W_W0QQitemZ300103193185QQihZ020QQcategoryZ18803QQrdZ1QQcmdZViewItem (just an example)..you could net a 2ohm load with that if im correct....and the type r at 2ohms is usually cheaper than the 4 ohm from my research online i believe you can score one for around a hundred a piece plus shipping....id like to go that route as well but i found another sub im gonna use...theres a post on that already somewhere ...
jamesp on 04/23/2007 21:31:50
TILoud, I would get the Alpine 2+2DVC subs if I had 1000+ watts of amplification cause I love the way my type R sounds. My electrical system handles my stuff easily but if I add more power I will probably have to upgrade the charging system. If I add another sub w/ my existing power I think that I need a pair with higher sensitivity. Honestly, I dont what to expect but I have done well taking advice from this group.
The sub you are looking at in your other thread is interesting. Have you listened to one of them.
Sorry that I kind of hijacked your thread here..I didnt intend to do that
trunkisloud on 04/23/2007 23:15:03
its cool man....threads often turn into bigger issues...its everyones thread....if you are asking about the elemental designs speaker yea ive heard a few of their woofers including a pair of these and they are really nice...nice sq and can produce some spl....this company is high quality but still kinda underground..hopefully their name will get out more. heres a link to some of their equipment and installs.
http://www.edesignaudio.com/edv2/ednews/home/index.php
swez on 04/24/2007 06:10:32
James, yes the 122.7 Kappas are DVC, 2+2 coils. D'oh! Must of had a brief Senior moment... LOL
A pair of those would work out well for your amp. They are high efficiency and would tend to put out more SPL with the same power you are now feeding the Alpine Type R.
You mentioned some JBL HT speakers earlier. Infinity is a sister company of JBL and all are under Harmon Intl. These guys have been in biz a long time and know how to build some solid gear that lasts. That's Pro, Commercial, Car and Home systems gear.
Have a look at page 6 of this manual:
http://akamaipix.crutchfield.com/Manuals/108/108K1227W.PDF
Note the response curve plot for this sub. See how it climbs above 90dB at ~35 Hz, peaks at 50 Hz (~92-93dB) and then rolls off gently above 60 Hz.? Now, that's a smooth responding sub.
Yes, it is rated at 2.83 volts for the sweep and that is pretty much the industry standard. (Apples vs Apples) When I see data like this on a given speaker, it tells a lot about the Mfg. They took the time to test the design and provide the technical performance data, (Typical min. performace to expect) that most sub makers do not share.
That's one thing I really like about Infinity and JBL. (Not all the hype and little or no specifications) They even calculate the in car response curve and show that too. This curve will vary from one vehicle to another, but note the "cabin gain" plot. (In car) It's a little bumpy below 40 Hz., but has a pretty linear roll off above 40 Hz. This tells us the sub was designed to give strong low bass performance, but rolls off smoothly too.
Hope that clarifies things,
Swez
jamesp on 04/24/2007 14:44:20
I think that I can do this by stacking another box or using a double box vertically in the "footprint" of my single box.
I found a pair of the Infinity 122.7's for a bit less than 300 delivered. An ebay store with a 99.8 rating on more than 50K transactions. Sonicelectronix doesnt have the 122.7's for some reason. They only have the 124.7, 4+4 DVC model and the adjustable Q Kappa Perfects..
The specs from Infinity list the sensitivity of the 122.7'sat 92dB. The ebay seller that has the good price on them has the sensitivity listed at 90dB. I wonder what the deal was on those discontinued Infinities I posted a Crutchfield link to that had a sensitivity rating of 96dB?...I wish that I could actually listen to some of these speakers somewhere do the big box stores typically have this stuff available to demo sound? I might have to leave the sticks and head toward the big city and see whats up...
Replies (27)
ShootuhMcBustaCap on 04/21/2007 20:46:09
Yeah, the MRP-4M450 is a nice little piece there trunk. My brother runs one with an Infinity perfect 12DVQ sub in his bimer, and it does pretty nice. Would like to hear it off some real RCA's and lose the loc and stock head unit.
trunkisloud on 04/21/2007 22:39:03
yea i got it on 2 pioneer premier ts-w306 12's its doin fantastic...runnin off a panasonic CQ-C7413U pushin 5v preouts....it sounds pretty sweet..
ShootuhMcBustaCap on 04/22/2007 09:52:01
I bet. I want an Alpine amp bad. My first amp was an Alpine, and aside from the JBL I have now, was the only quality amp I ever had. It was a four channel though....
jamesp on 04/22/2007 22:16:29
TIL....How many watts are you giving each sub???
trunkisloud on 04/22/2007 23:37:43
not sure exactly.....its class d mono runnin at 4ohms....maybe 200
ShootuhMcBustaCap on 04/23/2007 09:35:54
The Mrp M450 runs 250 watts at 4 ohms, and 400 at 2. Kicks my wattage rating in the face....
jamesp on 04/23/2007 09:47:28
So if the amp puts actually puts out 250 watts at 4 Ohms, with 2 SVC subs wired at 4 Ohms each, does each sub get 125 watts or 62.5 watts. Based on this reply to my post, it seems that the answer would be 62.5.Or is it 125....Im confused.... Below is a reply to my question concerning 2 subs on a mono amp...If I can get an answer, Ill understand the situation...maybe.lol
*************************************************************************
"if you wire each of the VC's in series, you will have 4 - 4 ohm voice coils in series which means you add them all up. You would have a net impedence of 16 ohms. You will need to do a series parallel configeration with 2 in series, and 2 in parallel to get a 4 ohm load to your amp. That power will be divided equally between the VC's so if your amp puts out 300 watts at 4 ohms, you will have 75 watts per driver, and 37.5 watts per VC."
***************************************************************************
I dont understand why if my amp is good for 300 watts at a 4 Ohm load, why is it only putting out a total of 150 watts in the scenerio above
swez on 04/23/2007 11:05:14
That Alpine is rated pretty fairly. It was mentioned that it delivers 250 Wrms @ 4 ohms and 400 Wrms @ 2 ohms. That is pretty much the norm for a typical Class D sub amp.
Now, the amps power is linked directly to the resistive load it sees. If one used a pair of 4 ohm SVC's and they are wired parallel, that's a net 2 ohm load and each sub gets 200 Wrms. (This is optimal for this amp)
If we used a 4+4 DVC and wired both coils in parallel, that sub is now 2 ohms and would get 400 Wrms as well. (Just like your system now, only your amp is stronger and delivers over 700 Wrms @ 2 ohms)
When using a pair of 4+4 DVC's, we have two usable choices. (1 or 4 ohm loads, depending on how the subs are wired to the amp) In this case, the Alpine would deliver 250 Wrms @ 4 ohms. (125/sub) Not bad, but not optimal either. This amp is not 1 ohm stable and one would be ill-advised to try a 1 ohm load on this system.
If one wanted to get the optimal results with this amp and 2 DVC subs, each sub would need to be a 2+2 DVC. When wired series/parallel, the amp would see a net 2 ohms and deliver a full 400 Wrms. (200/sub)
Are you tracking with the concept now?
Swez
ShootuhMcBustaCap on 04/23/2007 11:11:19
If trunk's subs are 4 ohm DVC subs, it would be a series pallelel wiring. The voice coils in series (8 0hms each) and the subs themselves in parrelel. That would be a four ohm total setup and would net 125 rms per driver, and each coil at 62.5.
When you double ohmage, power typically halves. so at four ohms it would be full, half at 8 and a quater at 16. And so on. It is claimed by some that you get cleaner power and sound at higher ohmage levels, which is a great explanation of the difference in the usage of class D and say a 4 channel.
ShootuhMcBustaCap on 04/23/2007 11:12:10
Doh! Typing at the same time are we??
jamesp on 04/23/2007 11:30:40
****EDIT @ 11:57 EST .. yes, I finally see the light*****
I am closer but not quite there and I apologize for the denseness but:
Why will the Alpine take a 2 Ohm load with 2 subs, and my amp have to have a 4 Ohm load with 2 subs??
It seems like I could use a pair of Infinity Kappa 2+2 DVC subs with my amp and deliver 300+ watts to each.With a series/parrallel setup wouldnt each sub have 4 Ohms and then connect them to the 2 outputs on the amp which I have been told are wired in parrallel for a net 2 Ohms?? This would work , right??? 300+ watts to ea. Kappa 2+2 DVC would be optimal would it not??
jamesp on 04/23/2007 11:54:11
I looked at the other thread and didnt see your post and responded here. The Kappa 2=2DVC's would be the ticket if I want to change things around dont you think?/?
thanks for breaking it down. I just was not catching the fact that the your diagrams were showing series/series or series/parralel...just thought there was one diagram for each VC setup...Ill catch on .........................................eventually
ShootuhMcBustaCap on 04/23/2007 12:36:56
Well, the 2+2 Kappas would be the ticket, but unfortunately, Infinity has yet to bless us with any 2 ohm coils. They make single 4 and dual 4 apps only. The best thing here would be to use 2 single ohm coils.
jamesp on 04/23/2007 12:52:32
Shootah, are you saying to use 2 subs each with a single, 4 Ohm coil?... If I do it like that will each sub get 300+ watts?
The thing that is throwing me off is that my amp has 2 sets of speaker outputs, With my current single sub, I am only using one set of outputs and all of the sub wiring diagrams show only 1 set of speaker outputs on the amps...does that make sense?
jamesp on 04/23/2007 13:03:05
Shootah, I cant use 2, 2 Ohm speakers. The manual shows that when using 2 speakers, one on each of the amps 2 sets of outputs that they must be 4 Ohm minimum.
ShootuhMcBustaCap on 04/23/2007 13:08:56
I meant 2 single 4 ohm coils. My bad. I get what you are getting at with two sets of speaker outs. I have worked with a couple sub amps in the past like this.
If two single 4 ohm coil subs are used, each will get 300 watts from your amp, if it is 600RMS at two ohms.
jamesp on 04/23/2007 13:13:01
All right, I will look around and see wnat I ca score a pr of Infinity Kappa 4 SVC 12's for.
I really like my Kappa comps that I have up front.
ShootuhMcBustaCap on 04/23/2007 13:30:13
uh-oh he's goin in............Gotta love new projects..
swez on 04/23/2007 13:30:32
Yep, we are looking at a pair of Kappa 4 ohm SVC's here. In parallel, the amp sees a net 2 ohms. In my recollection, Infinity does not make a 2+2 DVC to date. So, we look for a pair of 4 ohms SVC's to get the job done.
Infinity and JBL are sister companies of Harman Intl. This company makes some top-flight gear for Pro, HT, Commercial and car audio. Have used JBL for years in Pro gear apps. JBL speakers and Crown amps are a great combo, if you like the sound they deliver. (I do) But it may not be every man's cup of tea.
After a few installs with JBL or Infinity aftermarket speakers and amps, am very comfortable to suggest/recommend them.
Swez
jamesp on 04/23/2007 14:45:18
I am totally happy with my Alpine R sub/amp combo but if I can find a sweet deal on a pair of the Kappas, that will give me something to do on a rainy weekend to keep me out of trouble.
I bought a big pair of JBL speakers in early 1975 when I put together my second home stereo system. No one had heard of them around here at the time but when I was in the stereo shop and heard them they were the best bang for the buck on the floor . I used and abused that system for at least 15 years before giving it all away to a friend. Those speaker cabinets weighed more than 50 lbs it seemed. In retrospect, I wonder how that system would compare to a system that cost the same today..beacuse then it was over 1200 dollars....big bucks...
jamesp on 04/23/2007 15:26:37
This is the only type of Infinity Kappa 4 Ohm SVC I can find and the sessitivity is 89 db..Crutch has a pic of a Kappa perfect with a sens rating of 96db but says it is no longer available...The search is on.
http://cgi.ebay.com/INFINITY-KAPPA-PERFECT-12-VQ-12-SUBWOOFER-12VQ-SUB_W0QQitemZ300102415938QQihZ020QQcategoryZ18803QQtcZphotoQQcmdZViewItem
jamesp on 04/23/2007 17:51:21
According to Crutchfield this sub has 2, 2 Ohm VC,s but...
Power Handling: The woofer has two 2 ohm voice coils internally wired together. The total power handling is 350 watts RMS, 1400 watts peak. There is no provision for wiring the voice coils individually.
What's Included
What’s in the Manufacturer’s Box?
» Download Owner's Manual
One 12" Woofer
Self-adhesive foam gasket
2.5mm Allen wrench
Instructions
Technical data sheet
Warranty and on-line product registration card
Window sticker
Top of Page
$199.99
Save to Wishlist
Infinity Kappa 122.7w
12" subwoofer with selectable 1- or 4-ohm impedance
trunkisloud on 04/23/2007 18:46:00
or.........you can score a pair of 2ohm dvc type r's....heres a link ...http://cgi.ebay.com/ALPINE-SWR-1222D-Type-R-12-DVC-2ohm-Subwoofer-Sub-1500W_W0QQitemZ300103193185QQihZ020QQcategoryZ18803QQrdZ1QQcmdZViewItem (just an example)..you could net a 2ohm load with that if im correct....and the type r at 2ohms is usually cheaper than the 4 ohm from my research online i believe you can score one for around a hundred a piece plus shipping....id like to go that route as well but i found another sub im gonna use...theres a post on that already somewhere ...
jamesp on 04/23/2007 21:31:50
TILoud, I would get the Alpine 2+2DVC subs if I had 1000+ watts of amplification cause I love the way my type R sounds. My electrical system handles my stuff easily but if I add more power I will probably have to upgrade the charging system. If I add another sub w/ my existing power I think that I need a pair with higher sensitivity. Honestly, I dont what to expect but I have done well taking advice from this group.
The sub you are looking at in your other thread is interesting. Have you listened to one of them.
Sorry that I kind of hijacked your thread here..I didnt intend to do that
trunkisloud on 04/23/2007 23:15:03
its cool man....threads often turn into bigger issues...its everyones thread....if you are asking about the elemental designs speaker yea ive heard a few of their woofers including a pair of these and they are really nice...nice sq and can produce some spl....this company is high quality but still kinda underground..hopefully their name will get out more. heres a link to some of their equipment and installs.
http://www.edesignaudio.com/edv2/ednews/home/index.php
swez on 04/24/2007 06:10:32
James, yes the 122.7 Kappas are DVC, 2+2 coils. D'oh! Must of had a brief Senior moment... LOL
A pair of those would work out well for your amp. They are high efficiency and would tend to put out more SPL with the same power you are now feeding the Alpine Type R.
You mentioned some JBL HT speakers earlier. Infinity is a sister company of JBL and all are under Harmon Intl. These guys have been in biz a long time and know how to build some solid gear that lasts. That's Pro, Commercial, Car and Home systems gear.
Have a look at page 6 of this manual:
http://akamaipix.crutchfield.com/Manuals/108/108K1227W.PDF
Note the response curve plot for this sub. See how it climbs above 90dB at ~35 Hz, peaks at 50 Hz (~92-93dB) and then rolls off gently above 60 Hz.? Now, that's a smooth responding sub.
Yes, it is rated at 2.83 volts for the sweep and that is pretty much the industry standard. (Apples vs Apples) When I see data like this on a given speaker, it tells a lot about the Mfg. They took the time to test the design and provide the technical performance data, (Typical min. performace to expect) that most sub makers do not share.
That's one thing I really like about Infinity and JBL. (Not all the hype and little or no specifications) They even calculate the in car response curve and show that too. This curve will vary from one vehicle to another, but note the "cabin gain" plot. (In car) It's a little bumpy below 40 Hz., but has a pretty linear roll off above 40 Hz. This tells us the sub was designed to give strong low bass performance, but rolls off smoothly too.
Hope that clarifies things,
Swez
jamesp on 04/24/2007 14:44:20
I think that I can do this by stacking another box or using a double box vertically in the "footprint" of my single box.
I found a pair of the Infinity 122.7's for a bit less than 300 delivered. An ebay store with a 99.8 rating on more than 50K transactions. Sonicelectronix doesnt have the 122.7's for some reason. They only have the 124.7, 4+4 DVC model and the adjustable Q Kappa Perfects..
The specs from Infinity list the sensitivity of the 122.7'sat 92dB. The ebay seller that has the good price on them has the sensitivity listed at 90dB. I wonder what the deal was on those discontinued Infinities I posted a Crutchfield link to that had a sensitivity rating of 96dB?...I wish that I could actually listen to some of these speakers somewhere do the big box stores typically have this stuff available to demo sound? I might have to leave the sticks and head toward the big city and see whats up...
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