HiVi TN25 Fabric Dome Tweeter

HiVi TN25 Fabric Dome Tweeter

Brand:| Model: TN25
HiVi combines a hand treated 1" fabric dome, large non-resonant rear acoustic chamber, and a Ferrofluid cooled voice coil together in the TN25, creating a high performance tweeter with small faceplate for close driver placement.
  • Inherently shielded neo motor
  • Fabric dome for a smooth, natural sound
  • Large acoustic chamber reduces Fs for low crossover points
Part # 
Weight: 1 lbs.  
List Price$30.99
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Part # 297-408
Qty:  EA
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Product Details

HiVi TN25 Fabric Dome Tweeter

HiVi combines a hand treated 1" fabric dome, large non-resonant rear acoustic chamber, and a Ferrofluid cooled voice coil together in the TN25, creating a high performance tweeter with small faceplate for close driver placement. Self-shielded neodymium motor protects sensitive electronics will focusing the magnetic flux in the gap.

Specifications: • Power handling: 20 watts RMS/40 watts max • VCdia: 1" • Nominal impedance: 5 ohms • DC resistance: 4.6 ohms • Frequency range: 2,500-22,000 Hz • Fs: 1,500 Hz • SPL: 89 dB 1W/1m • Dimensions: Overall diameter: 2-1/8" x 2-1/8", Cutout diameter: 1-11/16", Depth: 2-1/2".

Product Specifications
  • Tweeter TypeSoft Dome
  • Cone / Dome Diameter1"
  • Impedance5 ohms
  • Power Handling (RMS)20 Watts
HiVi TN25 Fabric Dome Tweeter
  • BrandHi-Vi
  • ModelTN25
  • Part Number297-408
  • UPC844632021794
  • Product CategoryTweeters
  • Unit of MeasureEA
  • Product Rating
    (18 Reviews)
  • Weight1 lbs.
  • California Prop 65

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

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HiVi TN25 Fabric Dome Tweeter
HiVi TN25 Fabric Dome Tweeter is rated 4.7222 out of 5 by 18.
Rated 5 out of 5 by from Mellow, clean sound with a small mounting diameterPE was having a special on these at the same time that I got an itch to build a pair of bookshelf speakers, so I picked up a pair along with two Dayton RS125-8 5-inch Reference woofers.A custom Linkwitz-Riley crossover at 5kHz is significantly above the minimum that these can tolerate, but even so, the high-end output from these units is extremely clean and mellow. I can listen to them all evening without getting fatigued, and the off-axis response is adequate for my use as nearfield monitors on an office cubicle desk.The 89dB rated response is a fairly good match for many smaller woofers, although I did L-pad them for a better match to my 85dB-rated woofer. Also, the relatively small diameter of the rear chamber means the baffle can be cut with a hole saw, rather than requiring special work with the jigsaw or plunge router.I would definitely consider these again for another bookshelf speaker project.
Date published: 2014-04-12
Rated 5 out of 5 by from Amazing Tweeter For The Price!!Pros. - Clean, Natural sounding easy to listen to. Also handles high volumes well. Fantastic tweeter I have 3 sets of them in different builds and love them all.Cons. - Small faceplate makes mounting a bit more difficult. "Measure twice cut once as they say."X-Over Pros preloaded specs for this speaker as of Dec 31 2000.Fs=1500, Qms=2.201, Cms=0.0184 in/lb, Mms=0.00381 oz, Rms=1.016lb/s, P-Dia=.984 in, Sd=.761, Qes=5.33, Re=4.6 ohms, Le=.0388 mH, Z=5 ohms, BL=.21 lb/A, Pe=20 watts, Qts=1.558, 1-W SPL=85.6 dB, 2.83-V SPL=88 dBHope these specs help!!
Date published: 2013-12-16
Rated 5 out of 5 by from SmoothFor the price this is an excellent tweeter. A clean sweet sound equal to drivers 2 or 3 the cost.
Date published: 2013-02-21
Rated 5 out of 5 by from Fit My Needs & sounded good!I bought two of these based on favorable reviews and electrical/acoustic parameters. I have a mediocre pair of old aftermarket Sony 4 ohm 6x9" speakers on the rear deck my car. My plan was to disconnect the crummy mylar tweeters and mount the new HiVis next to the existing speakers on the deck. I used 14.7uF of capacitance each and protected them from direct sunlight with speaker cloth stretched over a flange I manufactured for them that recesses the tweeter slightly so the fabric does not come into contact with the dome. After connection, voila! Worked perfectly, voicing transitioned well with the adequate bass of the Sonys and efficiency matched nicely as well. The Sonys didn't have a true crossover as apparently the manufacturer just used the natural roll-off of the woofers, so my solution, (around 2,200Hz 1st-order x-over), worked just fine! Previous comments concerning transparency and detail were accurate. I am pleased.
Date published: 2014-04-05
Rated 5 out of 5 by from Excellent performer, but what happened to the value?I just revived a pair of diy t-lines with Zeta .5 series crossovers, the TN25 crossing over at 4000hz to a vintage Rogers polypropylene mid-woofer and a no longer available Vifa M22WR-09-06 woofer doing the bass chores. An l-pad with a 1 ohm series and 10 ohm leg was necessary. Transparency and naturalness are its virtues. It amazingly handles the frightening penny whistles of The Banquet from the Jarvi recording of Ivan the Terrible and Christina Deutekom as the Queen of the Night with aplomb. It just never draws attention to itself. However, they've unfortunately doubled in price since I bought them. Nevertheless, an excellent performer, especially where space is a concern.
Date published: 2012-03-07
Rated 5 out of 5 by from Best bang for the buckI used this tweeter in one speaker build and when I decided to build another pair of speakers I immediately chose these tweeters. I normally prefer ribbon tweeters, but these are the best choice when a ribbon tweeter will not fit due to size.
Date published: 2013-06-15

Product Q&A

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HiVi TN25 Fabric Dome Tweeter

Crossover question.

If I'm using the HiVi TN25 and a HiVi M4N 4" Aluminum/Magnesium Midbass in a small boombox, about the size of a lunch box, is a crossover recommended? Thx.
Asked by: Reelz
The other posts here are correct. A crossover both protect the tweeter from burnout and keeps the woofers high frequency output from spurious out of phase pollution of what should be cleaner, sweeter output from the tweeter.So, you should use a crossover--on both the woofer and the tweeter. This is despite the fact that many supposedly quality manufactures of speakers (PE's Dayton B652's are a current good example) do not spend the money on the coil/inductor necessary for the woofer, trying to cut corners by hoping the voice coil of the woofer has inherent inductance does the trick. But it doesn't sound very good.Still, the drivers you selected are both very good quality. If you put a zobel (impedance flattening circuit) on the woofer, you can use a simple first order crossover. This could be any kind of inductor (air or cored) with a value of 0.4mH to 0.5 mH in series with the positive lead. Since the Re of the woofer is 6.5 Ohm, you could use PE's standard 10W 8.2 Ohm ceramic resistor married to about a 15 uF cap to achieve this. Although less expensive than PE's "audio grade" non-inductive resistors, I have measured these side by side with the audio grade resistors to confirm that they actually have less induction than the more pricey audio grade "boutique" resistors. So I recommend the cheaper ones as superior and more affordable (and I have use literally hundreds upon hundreds of these).The tweeter is nominally 5 Ohms and is about 5 dB's brighter than the woofer. Despite the theoretical ideal of getting them to be the same efficiency (in dB's of SPL) for most male listeners over 25 years of age, a difference of up to about 2-3 dBs (with the tweeter being brighter) is more desirable. So putting a 2-3 Ohm resistor is better and also give you a simple 8 Ohm tweeter to crossover. You can then put a second order crossover on the tweeter, using something like a cap at 4.5 uF to 5 uF in series and 0.4 mH in shunt (parallel). No need to reverse the polarity, as is common with 12 dB xovers--but you are welcome to check this yourself.As long as you use film capacitance in the high pass (tweeter) section you will be happy with the result. You need not agonize about what kind of film cap you use (polypropylene or polyester/Mylar). It is not likely you could hear any difference between the different film dielectric materials anyhow. But using a NP electrolytic cap(s) would be a mistake that will be audible. I say this from having measured the DF (dissipation factor) in many, many caps and from having built and sold thousands of crossover upgrades.
Answered by: Litekeys
Date published: 2014-04-05

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