Eric,
When you refoam, try to match the amount and location of the glue that is added to the backside of the cone, on the surround and on the cone. There is usually quite a bit of extra glue added here to damp standing waves in the cone.
I can post the data for the npt-11-016-1 woofer next week.
I've got plenty of VT-3 amplifiers still available.
When you refoam, try to match the amount and location of the glue that is added to the backside of the cone, on the surround and on the cone. There is usually quite a bit of extra glue added here to damp standing waves in the cone.
I can post the data for the npt-11-016-1 woofer next week.
I've got plenty of VT-3 amplifiers still available.
Re: npt-11-096-1 w/ 3.3 x-over
Hello All;
I'm about to place an order, and have a question in pairing the npt-11-096-1 (Super Series) tweeter with the crossover for the M3.3.
I realize I'll probably need to make a heat-sync & tweak values for the HF region of the crossover - I'll play with it in LTspice. (I'm pretty new to design, but I'm not afraid to try & fail.)
I'll be using it (hopefully) with the NPT-11-025-1 and NPT-11-070-1 (the M3.3 mid-drivers), Is there anything that will prevent the pairing of this tweeter with these 2 mid-range drivers?
Thanks in advance.
Hello All;
I'm about to place an order, and have a question in pairing the npt-11-096-1 (Super Series) tweeter with the crossover for the M3.3.
I realize I'll probably need to make a heat-sync & tweak values for the HF region of the crossover - I'll play with it in LTspice. (I'm pretty new to design, but I'm not afraid to try & fail.)
I'll be using it (hopefully) with the NPT-11-025-1 and NPT-11-070-1 (the M3.3 mid-drivers), Is there anything that will prevent the pairing of this tweeter with these 2 mid-range drivers?
Thanks in advance.
I've got a bunch of these, too, for a minimonitor project. They should work very well in a 3.3 clone, maybe better than the original because they can be butted closer to the midrange. The response seems very smooth.
Since the impedance of the 096 is much lower than the original Seas tweeter, you are going to have to rescale all of the crossover components in the tweeter section. Other than that, it will work fine.
Total Newbie Question
Hi everyone, this is my first post. I'm not an avid HT guy, and I don't really know that much about audio equipment. I'm trying to put together a HT room on a limited budget, so I'm hoping I can get some expert advice here.
I came across the diyaudio.com forum while researching the NHT 2.5i speaker. WOW! I am amazed at how much information there is about speakers. No, I'm SHOCKED to find out there's quite a bit of science about it.
I have a couple of specific and then general questions for Jack Hidley (or anyone else) who appears to be an expert on NHT speakers. I would like to use my exisitng NHT speakers and get some additional NHT speakers for the set up.
First, I own the following NHT speakers and I'd like to know if they are well suited for each other.
(2) NHT 2.5i
(2) NHT Super Two
(1) NHT AudioCenter-1
(1) NHT SW2Si
I am considering buying another used pair of the 2.5i speakers for my rear (replacing the SuperTwo's that I'd move to another room - is this even necessary? should I buy the 2.9 speakers for the front instead?), another SW2Si subwoofer (not sure if this is necessary and whether or not the NHT SA-2 amp was truly designed to handle two subwoofers though the sales person said it would) and the NHT IC-2 or IC-3 speakers for the middle channel in ceiling speakers.
The room is about 17' long and 14' wide. I'm mounting a fixed 105" diagonal screen and a Sanyo PLV-60HT projector in the room. All of this equipment is new in the box and has sat around for YEARS waiting to build my home theater. 🙁
I'd appreciate your input as I know very little about speakers, and purchased my speakers based on the information from the salesperson.
Finally, the used pair of NHT 2.5i's that I'm thinking about buying (for $300) have some rust on the feet and screws that hold in the speakers (I could post pictures if that would help). What possible hidden damage could there be? What would cause rust on these areas? NONE of my NHT speakers have rust on them, so I don't know if this was a common problem or if they weren't stored properly. If they weren't stored properly, could that have damaged the drivers or other internal parts? These speakers are local, so I can inspect them prior to purchasing. Again, your feedback would be very helpful.
Sorry for my long first post! And thank you!!!!!
Thanks,
Mark
Hi everyone, this is my first post. I'm not an avid HT guy, and I don't really know that much about audio equipment. I'm trying to put together a HT room on a limited budget, so I'm hoping I can get some expert advice here.
I came across the diyaudio.com forum while researching the NHT 2.5i speaker. WOW! I am amazed at how much information there is about speakers. No, I'm SHOCKED to find out there's quite a bit of science about it.
I have a couple of specific and then general questions for Jack Hidley (or anyone else) who appears to be an expert on NHT speakers. I would like to use my exisitng NHT speakers and get some additional NHT speakers for the set up.
First, I own the following NHT speakers and I'd like to know if they are well suited for each other.
(2) NHT 2.5i
(2) NHT Super Two
(1) NHT AudioCenter-1
(1) NHT SW2Si
I am considering buying another used pair of the 2.5i speakers for my rear (replacing the SuperTwo's that I'd move to another room - is this even necessary? should I buy the 2.9 speakers for the front instead?), another SW2Si subwoofer (not sure if this is necessary and whether or not the NHT SA-2 amp was truly designed to handle two subwoofers though the sales person said it would) and the NHT IC-2 or IC-3 speakers for the middle channel in ceiling speakers.
The room is about 17' long and 14' wide. I'm mounting a fixed 105" diagonal screen and a Sanyo PLV-60HT projector in the room. All of this equipment is new in the box and has sat around for YEARS waiting to build my home theater. 🙁
I'd appreciate your input as I know very little about speakers, and purchased my speakers based on the information from the salesperson.
Finally, the used pair of NHT 2.5i's that I'm thinking about buying (for $300) have some rust on the feet and screws that hold in the speakers (I could post pictures if that would help). What possible hidden damage could there be? What would cause rust on these areas? NONE of my NHT speakers have rust on them, so I don't know if this was a common problem or if they weren't stored properly. If they weren't stored properly, could that have damaged the drivers or other internal parts? These speakers are local, so I can inspect them prior to purchasing. Again, your feedback would be very helpful.
Sorry for my long first post! And thank you!!!!!
Thanks,
Mark
Mark,
It appears that you just need customer support for NHT products, not assistance with DIY audio. NHT can be reached at 1-800-NHT-9993 or customerservice@nhthifi.com
It appears that you just need customer support for NHT products, not assistance with DIY audio. NHT can be reached at 1-800-NHT-9993 or customerservice@nhthifi.com
Jack,
Thank you for replying. I made my request here in case there was something wrong with the speakers and I needed to replace either the drivers or some internal component. I don't have the money to pay someone else to do it, so I was thinking I would try to do it if I was able to get some coaching and guidance along the way.
No worries. I'll try to get in touch with NHT and see if they will help me.
Have a great weekend and thanks again.
Regards,
Mark
Thank you for replying. I made my request here in case there was something wrong with the speakers and I needed to replace either the drivers or some internal component. I don't have the money to pay someone else to do it, so I was thinking I would try to do it if I was able to get some coaching and guidance along the way.
No worries. I'll try to get in touch with NHT and see if they will help me.
Have a great weekend and thanks again.
Regards,
Mark
The remaining (drivers only now) are linked to on the page linked to in the first post, specifically:
http://home.comcast.net/~jhidley/NHT_Drivers-2.xls
http://home.comcast.net/~jhidley/NHT_Drivers-2.xls
I'd love to build a few 5.1 systems with these drivers for friends/family as gifts...
Any crossover designs you can point me to for a good 2way design using the super series tweeter? Can the peerless 8 clone be used in a 2way and reach up high enough? (or should I stick with the 6.5 foster)
Any crossover designs you can point me to for a good 2way design using the super series tweeter? Can the peerless 8 clone be used in a 2way and reach up high enough? (or should I stick with the 6.5 foster)
If you post an e-mail address, I can forward you some existing crossover designs that use this tweeter.
I've never tried to use the Peerless 8" up to 2kHz, but I think it would suck. Even if the driver has smooth enough frequency response to 3kHz, the power response is going to be very poor. The speaker would only sound good directly on axis in a dead room. I would stick with the 6.5" Foster or Peerless or use the Peerless 8" in a sealed box with the 4" Seas mid and SS tweeter.
Spastic,
Frequency response curves for which drivers?
BTW, I added a couple new things to the website today. In a week I might add a complete finished subwoofer. A friend of mine started building production subs with the 12" AR woofer and Foster plate amps. The deal fell apart, but he still has a number of the finished subwoofers available.
I've never tried to use the Peerless 8" up to 2kHz, but I think it would suck. Even if the driver has smooth enough frequency response to 3kHz, the power response is going to be very poor. The speaker would only sound good directly on axis in a dead room. I would stick with the 6.5" Foster or Peerless or use the Peerless 8" in a sealed box with the 4" Seas mid and SS tweeter.
Spastic,
Frequency response curves for which drivers?
BTW, I added a couple new things to the website today. In a week I might add a complete finished subwoofer. A friend of mine started building production subs with the 12" AR woofer and Foster plate amps. The deal fell apart, but he still has a number of the finished subwoofers available.
For anyone that is coming to Burning Amp, we can deliver your driver order to you there. No UPS shipping costs! However, we aren't bringing drivers for sale, so you will need to place your order and pay for it before hand. We'll then deliver the order to you at BA08.
NPT-11-025-1
Can i use the 2.9 midrange driver (NPT-11-025-1) in my 2.5i ?
I cant find replacement mid-range drivers for the 2.5i.
Even if its not a perfect match, will i be missing a large frequency band?
Can i use the 2.9 midrange driver (NPT-11-025-1) in my 2.5i ?
I cant find replacement mid-range drivers for the 2.5i.
Even if its not a perfect match, will i be missing a large frequency band?
Hi Jack. I'm looking to use a couple of the NPT-11-047-1 (8" Peerless) drivers as subwoofers for music/home theater duty in about an 18 ft by 12 ft room. Would you happen to have any enclosure recommendations for that woofer in this application?
Avikas,
Unfortunately, I don't have any drivers that can be used as replacements for the npt-11-046-1 woofer.
From a strictly mechanical standpoint, the 046 has a small frame OD. This makes it hard to fit most other 6.5" woofers into the baffle hole. The second problem is that the angled baffle on the M2.5i means that there is very little clearance from the motor of the woofer to the inside surface of the outer cabinet wall. The woofer you put in there must have a motor with a very small OD to not hit the cabinet wall. On other NHT speakers with angled baffles that had larger motor woofers, we had to route out a recess on the inside of the that wall just for motor clearance.
I have never compared the 025 frequency response to the 046, but at least their sensitivities are in the same ballpark. The Re values are the same. The big difference is the Qts. Since the driver is only used own to 125Hz in the M2.5i, the very different Qts won't have too much effect.
I've attached the 046 spec sheet.
Unfortunately, I don't have any drivers that can be used as replacements for the npt-11-046-1 woofer.
From a strictly mechanical standpoint, the 046 has a small frame OD. This makes it hard to fit most other 6.5" woofers into the baffle hole. The second problem is that the angled baffle on the M2.5i means that there is very little clearance from the motor of the woofer to the inside surface of the outer cabinet wall. The woofer you put in there must have a motor with a very small OD to not hit the cabinet wall. On other NHT speakers with angled baffles that had larger motor woofers, we had to route out a recess on the inside of the that wall just for motor clearance.
I have never compared the 025 frequency response to the 046, but at least their sensitivities are in the same ballpark. The Re values are the same. The big difference is the Qts. Since the driver is only used own to 125Hz in the M2.5i, the very different Qts won't have too much effect.
I've attached the 046 spec sheet.
Attachments
Brian,
By a couple do you mean two or four woofers?
What amplifier do you have to drive them? That will affect what type of eq may be available to make a sixth order vented system by modifying the HP filter in the amplifier.
The 047 woofer has a very low Qts. It was designed to be used in a tower speaker with a very low frequency passive crossover. This means there is a lot of DCR in the inductor to raise the Qts of the driver and quite a bit of resulting eq to shape the response curve. If you use this woofer in a vented box without any eq, the f3 won't be very low.
By a couple do you mean two or four woofers?
What amplifier do you have to drive them? That will affect what type of eq may be available to make a sixth order vented system by modifying the HP filter in the amplifier.
The 047 woofer has a very low Qts. It was designed to be used in a tower speaker with a very low frequency passive crossover. This means there is a lot of DCR in the inductor to raise the Qts of the driver and quite a bit of resulting eq to shape the response curve. If you use this woofer in a vented box without any eq, the f3 won't be very low.
Jack Hidley said:
I have 4 drivers to work with, so if using all 4 of them would yield the best results then I could certainly do that. Alternatively, I could pick up a couple of the larger 10" or 12" drivers you still have listed on the NHT surplus page.
As for amplifier power, I had planned to use either one LM3875 based amp per woofer (~50Wrms) or a UCD180 module (~100Wrms) to drive two in parallel. An active rumble and lowpass filter would be used regardless of what amplifier is used.
