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Reviews Categories | Filters, Audio: (DSP and others) | JPS NIR-12 Dual DSP Help

Reviews Summary for JPS NIR-12 Dual DSP
JPS NIR-12 Dual DSP Reviews: 15 Average rating: 4.8/5 MSRP: $375.00
Description: Dual DSP Noise & Interference Reduction
Product is in production.
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AE1CW Rating: 5/5 Jul 13, 2003 10:32 Send this review to a friend
Still useful in 2003!  Time owned: 6 to 12 months
I've now used the NIR-12 on 3 different radios: Patcomm, Kenwood TS-520SE and an Alinco DX77T. It is a helpful accessory for CW and SSB. Recently I was experiencing static and traced it to the speaker input jacks ground connection. I took the unit and circuit board out to repair this and was surprised to find 5 leads of various components that were not soldered to the bottom side of the two sided board. Maybe my unit was made on a Saturday night? I fixed the speaker in jack and soldered the missed leads and the unit is working great once again. I recommend this unit to all who do not have the latest transceiver with good DSP.
WA2MGB Rating: 5/5 Oct 22, 2002 14:28 Send this review to a friend
DSP: Perfection in a little black box  Time owned: 0 to 3 months
I recently aquired the NIR-12 from Ebay in near mint condition. After much fiddling with the adjustments I have found it to be a superb outboard DSP/Noise Reduction unit. Once you have the adjustments down where your ears are comfortable it is very easy to operate. I use it on everything from my Drakes to Swans to my Ten Tec Corsair. Remarkable. A shame they are no longer made. If you can find the NIR-12, go for it. It made my W9GR DSP look like a Model T.
KU4QD Rating: 5/5 Jun 14, 2000 12:38 Send this review to a friend
Very effective and easy to use.  Time owned: 3 to 6 months
I use my JPS NIR-12 with an Icom IC-735 and also an NCG 7/21/50. Neither of these rigs have a narrow SSB filter, and the NIR-12 makes up for this shortcoming admirably. The Dynamic Peak feature is great for eliminating atmospheric noise, and can really help pull the weak ones out. The notch filter also works well. All in all, I am very satisfied.
WA0UDX Rating: 5/5 Nov 5, 1999 09:21 Send this review to a friend
Very effective unit  Time owned: unknown months
I use the NIR-12 with my older Kenwood TS-940, and they make a very good pair. The NIR-12 makes the TS940 more on par with the newer DSP rigs. I am mainly a CW operator, and I find it very useful and worth the money. I bought it used for $175, but I would say it's worth the full retail price, if that's what you have to pay. You will find that you don't have to strain to tell if it is helping or not.
AC5AA Rating: 5/5 Oct 19, 1999 14:23 Send this review to a friend
The best DSP implementation  Time owned: unknown months
I have owned or evaluated a number of DSP units including the Timewave models, JPS, and W9GR families. I have found the NIR-12 to be the best single unit to cover many different noise types within the limitations of any audio DSP unit. In head-to-head measurement, the only other DSP which came close was the Timewave DSP-599ZX, and we had not even engaged the NIR function on the NIR-12 yet. This design has two processors, one which attacks in what I call the "frequency domain" and the other in the "time domain". NIR mode is what I call "time domain" and, as such, introduces some time delay. This makes it useless in QSK CW mode, and if you monitor your CW or SSB signal, you'll want to either disable it during transmit or use the bypass feature to disable it. I used the "dynamic peaking" processor, the "frequency domain" all of the time. It is equivalent to the Timewave and W9GR standard operating mode, but does a better job than either. Combine this with the passband controls (center freq and width) and you have a very strong combination against noise. When these were not quite enough, I would add in some of the NIR processing to gain a little more. Too much NIR will result in the strange artifacts that many people who don't like DSP complain about, but the ability to vary the aggressiveness of the NIR allows one to choose as conditions warrant. The "Notch" filter works extremely well on multiple heterodynes. It will remove RTTY or CW signals completely. The control arrangement, size and weight of the unit make it one of the easiest to adjust quickly. I have not used my NIR-12 for the last year as my new Omni VI+ has excellent on-board DSP, but the NIR-12 still tops my list as the best outboard unit that can be purchased. By the way, if you like to experiment with DSP, there is an add-on kit available to allow you to write your own processing algorithms and view the output on your PC. Although JPS appears to not have a web site up any more, there is information available at:
73, Duane
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