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LDS Sealed 15/8
- Thread starter kringle77
- Start date
It's tube amps that don't like some ported designs due to the high impedance spike they have. Other ported designs work fine with tubes as do sealed designs. SS will work with whatever. Sealed cabs have one impedance rise in the lowend, ported designs have 2. That second impedance spike is what some tube amps don't play well with if it's too high.
Thats all true. I love my old svt but, only with a sealed cab. I love my genz shuttle and shuttlemax with ported and sealed, though a sealed cab makes them both sound more like the svt so, I prefer sealed everytime. I guess thats one of the reasons I only gig with the genz, it is less fussy than the svt. I feel very confident that I could show up to gig with my bass and genz and make pretty much any cab so great or at least useable. I have a ton of love for my shuttlemax 9.2 and shuttle 9.0. I've never been happier with any amp and now I have a few great cabs to choose from. Modded nv610, modded ampeg 8x10 and now the LDS 15/8. All sealed.
Here is Bill's answer to that notion. " The average impedance of sealed cabs is lower than that of vented. SS amps don't care for low impedance loads. Sealed cabs are also less sensitive in the lows, and that can result in stressing the current capacity of SS amps in general and those with switching power supplies in particular. By the same token tube amps don't care for high impedance loads and can be bothered by ported cabs. "
I can see that if you're running at minimum impedance for the amp. Don't know much about switching amps, and of course, I'd defer to Bill on pretty much any of this stuff. Plenty of guys run SS amps on sealed 810's with no issues.
I am really concerned about the 20w rating of the 8 in this cab
A. Its a cheap driver.
B. He's used one of the same drivers in conjunction with 5-6 Bergantino NV 10's with success, so it should work, and if not, it's only another $20 or whatever for a new driver.
Yup! Seriously, 800hz on up doesn't require alot of watts. If this 8" can keep up with the 5 10" woofers at loud volumes, gig after gig, it will keep up with a single 15" at home and jams.
Seriously, 800hz on up doesn't require alot of watts. If this 8" can keep up with the 5 10" woofers at loud volumes, gig after gig, it will keep up with a single 15" at home and jams.
The Definimax 4015LF looks like a monster driver for a sealed 15 cab. Looking at the Eminence specs it's rated at 700 watts rms, 500 watts in a 1.722 ft3 sealed cab. What a hammer!
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At a nominal 8 ohm load this is a great match for amps like the Genz Benz SM9.2, STM900, Gallien Krueger MB800, 1001RBII, Mesa M9, etc which can drive it with 450 to 500 watts.
Please correct if needed but I remember reading something about power requirements versus frequency to the effect each octave up requiring 3dB less. If true, a woofer handling 500 watts at 100 Hz with a balanced mid 4 octaves up at 1600 hz would require about 31.25 watts (-12dB). The Jensen Mod8-20 might work fine in this application but with this monster perhaps the Faital 8FE-200 might be another good candidate for a similar build. US SPEAKER Home Page Menu - Speaker Cabinets, Guitar & amp; Bass Amps, upgrades and custom design. The world’s widest choice of speaker parts. “If you have listened to live music, you have almost certainly listened to Eminence” It has a ferrite (non-neo) magnet, handles 130 watts rms, 95 dB/W sensitivity, a nice response out to 5kHz, and only costs $60. Not bad.
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At a nominal 8 ohm load this is a great match for amps like the Genz Benz SM9.2, STM900, Gallien Krueger MB800, 1001RBII, Mesa M9, etc which can drive it with 450 to 500 watts.
Please correct if needed but I remember reading something about power requirements versus frequency to the effect each octave up requiring 3dB less. If true, a woofer handling 500 watts at 100 Hz with a balanced mid 4 octaves up at 1600 hz would require about 31.25 watts (-12dB). The Jensen Mod8-20 might work fine in this application but with this monster perhaps the Faital 8FE-200 might be another good candidate for a similar build. US SPEAKER Home Page Menu - Speaker Cabinets, Guitar & amp; Bass Amps, upgrades and custom design. The world’s widest choice of speaker parts. “If you have listened to live music, you have almost certainly listened to Eminence” It has a ferrite (non-neo) magnet, handles 130 watts rms, 95 dB/W sensitivity, a nice response out to 5kHz, and only costs $60. Not bad.
I had been having on my radar for quite some time a smallish sealed cab loaded with definimax 4015 lf, the best mid to cross it over IMO would be faital pro W6N8-120 or eminence delta pro 8, for old school type tone i would be going with delta pro hands down. 2x15 loaded with two definimaxes and two deltas would be monstruous old school thumper, but thats another story.
Yeah, that would be a very heavy but, very scary cab indeed! That 8 pro would be just alittle shy on the top end for me but, a great driver anyway.
That would be the nice choice for guys who prefer nice horizontal dispersion through the mids and high mids but somehow muted low highs we got used to (off axis) using 8x10 and 4x10 standard formats.
I am toying with the idea of a definimax 4015 sealed cab w/ mid as well. One of my concerns is that some fearful owners have claimed that the woofer/mid combo sound to polite and clinical, and that this version would be the same. I believe kringle has tried a fearful/nearful mid loaded cab before, so before I dive into a new project I will be interested to see if this cab has the same feel.
Do you think bumping up the crossover frequency could change the character of the cab? I am looking for a good rock cab - similar to the new baer cabs (at least how they are being described).
MikeBass
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- Nov 4, 2003
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I put in bold two things in your post.....the first is what I wish more would do.
The second is exactly what you discovered. Not true.
Don can build a nice box.
The new LDS will arrive today as well as a bergantino HT210 that I took as part of a trade. I expect that they will sound exactly opposite of eachother but, may actually pair well together pushed by my shuttlemax, 9.0 or 70's svt. Maybe not so much the svt/ht210.
OK. I saw that fedex had delivered the cab so, I headed home during lunch. You can't leave that stuff outside right?
I'll cover what I know. And fill things in later tonight with some pictures.
The tolex don used is really nice. Tough, good quality and he always does a great clean job with it. I un-boxed it in the garage and carried it in the house. The vertically mounted side handle worked just as I hoped. It was easy to carry one handed like a piece of luggage and when I got to my front door, I could opend the door with my left hand, and hold the cab out in front of me, resting on my thighs so that I wouldn't hit the cab on the door jams, door or wall. It was very comfortable and manageable. The weight is roughly 45lbs.
I plugged my stambaugh bass (my perfect version of the billy sheehan attitude basses that I've played for years) into a boss lmb-3 compressor, into a genz benz shuttle 9.0. I turned the mid all the way off and just tried the 15 first. I specified that the woofer would be run full range with the option of low passing at 800hz. With eq set flat, the sound is that round, warm Jamerson thing with a very tight, percussive punch. You get that sealed ampeg 8x10 compressed feel under you fingers even at low volume. I engaged the bright control and turned the treble up to 3 o'clock and man, what a nice sound. It would be enough treble for most finger style guys but, as with any 15", not great dispersion as I walked around the basement.
I set the eq flat and turned the mid up half way. There was "MY" tone. Super tight, hard low mid punch, a bright top end with the right amount of upper mids that don't get harsh or clacky. I turned up the volume a bit on the shuttle and walked around. The dispersion was great and the sound was very even from side to side. And like any of my sealed cabs, the sound/volume were closer up close and far away. I never get that with ported cabs.
My initial impression (trying to stay calm and objective because Im so excited) is that I wish I would have had this cab built several years ago when I first thought of it. I would have saved alot of time, money and frustration. It sounds like "I" think a bass cab should sound. When you stop a note. It STOPS. Very responsive, accepts eq better than most cabs, top end is bright but smooth. Basically, I met my goal because it sounds like my modded nv610 only smaller and my initial thought is that it sounds better at low volume than the bigger cab. I'll have to break it in and turn it up to see what the overall output is but, I think that it would cover most folks gigs on it's own. I would want a pair for gigging but, I play loud and use very little if any pa support lately. The delta 15lfa is only about 95db over most of it's range so, the cab needs a high power amp like the 9.0 to the most out of it. Im predicting that this will be the best matching cab my vintage svt has ever seen. More review and pics later tonight. I hate it when life gets in the way.
I'll cover what I know. And fill things in later tonight with some pictures.The tolex don used is really nice. Tough, good quality and he always does a great clean job with it. I un-boxed it in the garage and carried it in the house. The vertically mounted side handle worked just as I hoped. It was easy to carry one handed like a piece of luggage and when I got to my front door, I could opend the door with my left hand, and hold the cab out in front of me, resting on my thighs so that I wouldn't hit the cab on the door jams, door or wall. It was very comfortable and manageable. The weight is roughly 45lbs.
I plugged my stambaugh bass (my perfect version of the billy sheehan attitude basses that I've played for years) into a boss lmb-3 compressor, into a genz benz shuttle 9.0. I turned the mid all the way off and just tried the 15 first. I specified that the woofer would be run full range with the option of low passing at 800hz. With eq set flat, the sound is that round, warm Jamerson thing with a very tight, percussive punch. You get that sealed ampeg 8x10 compressed feel under you fingers even at low volume. I engaged the bright control and turned the treble up to 3 o'clock and man, what a nice sound. It would be enough treble for most finger style guys but, as with any 15", not great dispersion as I walked around the basement.
I set the eq flat and turned the mid up half way. There was "MY" tone. Super tight, hard low mid punch, a bright top end with the right amount of upper mids that don't get harsh or clacky. I turned up the volume a bit on the shuttle and walked around. The dispersion was great and the sound was very even from side to side. And like any of my sealed cabs, the sound/volume were closer up close and far away. I never get that with ported cabs.
My initial impression (trying to stay calm and objective because Im so excited) is that I wish I would have had this cab built several years ago when I first thought of it. I would have saved alot of time, money and frustration. It sounds like "I" think a bass cab should sound. When you stop a note. It STOPS. Very responsive, accepts eq better than most cabs, top end is bright but smooth. Basically, I met my goal because it sounds like my modded nv610 only smaller and my initial thought is that it sounds better at low volume than the bigger cab. I'll have to break it in and turn it up to see what the overall output is but, I think that it would cover most folks gigs on it's own. I would want a pair for gigging but, I play loud and use very little if any pa support lately. The delta 15lfa is only about 95db over most of it's range so, the cab needs a high power amp like the 9.0 to the most out of it. Im predicting that this will be the best matching cab my vintage svt has ever seen. More review and pics later tonight. I hate it when life gets in the way.
I think that's a function of the particular mid driver used. The fEARful being described as more monitor-like, the Baer's a little more "bass cab-like" in that it imparts a bit of it's own character up there. Different goals/different results. The LF drivers have a fairly nasty peak towards the top of their range that raising the xover point or using a shallower slope would get into. Not nearly as musical as using a mid you like.
And sure, you can twist a "flat" cab to sound like most anything if you have enough gizmo's. For simple plug-n-play, you'd likely end up closer to the target plugging into one that's already "voiced" a bit towards your goals to start with. Not knocking either design, both are excellent....just different strokes.
I have never played a NV215 cab but, Im betting this one sounds very similiar. The lds would have more top end output and extension as, I believe, the NV215 uses a stock eminence mid that doesn't go as high or is as efficient.
Im pretty sure that using the low pass option on the woofer would result in a smoother overall sound with less growl. For once, I don't plan on opening up the cab and trying it since growl was one of the qualities I was after. Im betting that the ht210 thats arriving later today would really fill in the bottom end for and outdoor gig, with the tweet turned off of course.
There are times when my band does a gig acoustic where we all go direct to the board, the drummer uses only a few hand drums and we only use a pair of jbl prx635 tops. I can see this cab being the one I bring to fill out the bottom a bit. It could also double as my stool!
Im pretty sure that using the low pass option on the woofer would result in a smoother overall sound with less growl. For once, I don't plan on opening up the cab and trying it since growl was one of the qualities I was after. Im betting that the ht210 thats arriving later today would really fill in the bottom end for and outdoor gig, with the tweet turned off of course.
There are times when my band does a gig acoustic where we all go direct to the board, the drummer uses only a few hand drums and we only use a pair of jbl prx635 tops. I can see this cab being the one I bring to fill out the bottom a bit. It could also double as my stool!
