Vifa NE123W-08 4" Full Range Woofer Speaker

Brand:| Model: NE123W-08
The high fidelity/low distortion Peerless Vifa NE123W-08 4" Neodymium Woofer utilizes advanced design and measurement technologies in combination with carefully selected construction materials.
  • Cast aluminum frame promotes motor cooling
  • Sculpted design improves airflow and reduces reflections
  • High-strength compact neodymium magnet system
  • Proprietary coated natural wood fiber cone with half-roll rubber surround
  • Long-throw 1-1/4" voice coil on titanium former
  • Copper pole piece cap for extended HF response
  • 8 ohm nominal impedance
Part # 
Weight: 1 lbs.  
Due In: 7/24/2014
List Price$107.99
You Save21%
Your Price
Buy 4-up$77.55
Part # 264-1128
Qty:  EA
Available Payment Methods

Product Details

Vifa NE123W-08 4" Full Range Woofer Speaker

The Peerless Vifa NE123W-08 4" Neodymium Woofer features an innovative sculpted, open cast aluminum basket design that minimizes internal acoustic reflections and supplements the neodymium motor's dedicated heat sink. The cone is constructed of a coated natural wood fiber, with a butyl rubber surround designed by finite element analysis for linearity of performance. FEA techniques also contribute to inclusion of the motor's copper cap, which reduces inductance and extends high frequency performance.

Product Specifications
  • Nominal Diameter4"
  • Power Handling (RMS)90 Watts
  • Power Handling (max)180 Watts
  • Impedance8 ohms
  • Frequency Response60 to 8,000 Hz
  • Sensitivity86.2 dB 1W/1m
  • Voice Coil Diameter1.28"
Thiele-Small Parameters
  • Resonant Frequency (Fs)61 Hz
  • DC Resistance (Re)6.3 ohms
  • Voice Coil Inductance (Le)0.06 mH
  • Mechanical Q (Qms)4.98
  • Electromagnetic Q (Qes)0.37
  • Total Q (Qts)0.35
  • Compliance Equivalent Volume (Vas)0.21 ft.³
  • Mechanical Compliance of Suspension (Cms)1.43 mm/N
  • BL Product (BL)5.53 Tm
  • Diaphragm Mass Inc. Airload (Mms)4.7g
  • Maximum Linear Excursion (Xmax)3.1 mm
  • Surface Area of Cone (Sd)54.1 cm²
Materials of Construction
  • Cone MaterialWood Fiber
  • Surround MaterialRubber
  • Voice Coil FormerTitanium
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter4.84"
  • Baffle Cutout Diameter3.86"
  • Depth2.58"
  • # Mounting Holes5
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.05 ft.³
  • Sealed F3141 Hz
  • Vented Volume0.1 ft.³
  • Vented F384 Hz
Vifa NE123W-08 4" Full Range Woofer Speaker
  • BrandVifa
  • ModelNE123W-08
  • Part Number264-1128
  • UPC844632092596
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (3 Reviews)
  • Weight1 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Similar Products

View similar products to the Vifa NE123W-08 4" Full Range Woofer Speaker
in the Woofers product category.


Vifa NE123W-08 4" Full Range Woofer Speaker
Vifa NE123W-08 4" Full Range Woofer Speaker is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Amazing MidsAfter testing a few mid-range speakers , these are the clear winners ! They are very accurate in reproducing the human voice. More so than others tested...They areextremely clear and the sound has a touch of warmth at the same time...A zobel filtermakes it even better......
Date published: 2014-02-05
Rated 5 out of 5 by from Awesome!These are hands down some of the best speakers that I have owned. Everything is crystal clear and have a very warm feeling to them. If your in the market for a 4" midrange driver, chose these!
Date published: 2013-08-25
Rated 5 out of 5 by from Worth Every PennyI was a little nervous spending over $160 for a pair of 4 inch speakers but thankfully, they were worth every penny.I have them running in my car as midrange drivers crossed within a 500-4000hz bandpass. These drivers sound amazing! What surprised me the most was how well they handle the human voice. It literally sounds like the breath is on their lips.The small magnet is also very nice.....installing in shallow enclosures won't be a problem.Fantastic product....and as always...Parts Express shipped fast...well packaged.
Date published: 2012-09-27

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Vifa NE123W-08 4" Full Range Woofer Speaker

What's the correct baffle cutout ? PE page is currently showing it as 4.37" this doesn't seem to match the spec sheet 98cm

Asked by: Jeff_free69
The spec sheet is accurate, I will have the website updated.
Answered by: MattP
Date published: 2014-04-07

This is in addition to my first question, If the speakers range is 60-8k hz and the Fs is 61

Why would it struggle to achieve 70hz at the low end. If the vented box was a little bigger...say .20 cu ft would that be better ? Most people, including me, try to crossover to a sub-woofer at around 80 Hz. I was figuring 70 Hz to be on the safe side. I generally don't listen to music at loud levels and many times I'm listening at low levels, but would like the ability to play loud should I desire. If there is another speaker that might fit my needs better...like a full ranger...feel free to point one out. Thanks for your answer and for any that follow.
Asked by: Mickey
It is not really the box size that keeps this driver from playing that low it can play 70hz fine, the problem with drivers this small is they just don't have the displacement needed to play super loud. In my simulation the excursion peak is at 100hz, and it reaches that with only 13 watts, however this will give you close to 100dB. If your loud is under about 90 dB at listening position (quite loud) then you should be safe, I just like my speakers to be capable of a bit more then that. For a 4 inch woofer 100db is pretty good and I doubt you can do much better without going up to a larger driver.
Answered by: mtg90
Date published: 2012-08-10

I'd like to use this driver as a mid/woofer and cross it over to the tweeter at 5k hz in a two way minimonitor

I like the idea of letting a somewhat larger speaker like a four incher do the heavy lifting in the 1k-5k hz range and bring in a tweeter to pull out the highest notes. Even a good full range 4" would be up for the job. Any advice and/or is this not a good idea. I'm fine with the bass going down to just 70 hz or so. I'm using a subwoofer. Thinking about the Morel mdt 12 or Tang Band 28-847sd to go along with this Vifa. Also, any vented box volume suggestions. Throw in a sealed box volume just for curiosity sake also. Thanks very much in advance.
Asked by: Mickey
You should be good with this one running up to around 5-6khz.For box sizes a .15 cubic foot with a 1.5" diameter by 5" long port looks good, tuning is at 72 hz and f3 is just below that.In a sealed box your looking at 0.07 cubic feet for a qtc of .7, the f3 is ~130hz and your down 11 dB at 70hz.I say the ported look better if you go with your 70 hz crossover point, but the driver is still going to be stressed to play that low at anything over moderate volume levels.
Answered by: mtg90
Date published: 2012-02-18

Customer Projects

Customer projects that include: Vifa NE123W-08 4" Full Range Woofer Speaker

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

Discussions in our TechTalk Forum that include: Vifa NE123W-08 4" Full Range Woofer Speaker

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.

Recently Viewed Products

Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH45066USA

© 1996-2014 Parts Express, All Rights Reserved