Phenolic Ring Tweeter 8 Ohm

Phenolic Ring Tweeter 8 Ohm

At last, a faithful reproduction of the classic "phenolic ring" tweeter developed by CTS and used by Marantz, Altec, Martin, Acoustic Research and many others!
  • Modern reproduction of the famous CTS design used by Marantz, Altec, and many others
  • High efficiency and smooth response
  • Restore your classic speaker system from the Seventies!
Part # 
Weight: 1 lbs.  
List Price$21.99
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Buy 4-up$14.30
Part # 270-252
Qty:  EA
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Product Details

Phenolic Ring Tweeter 8 Ohm

At last, a faithful reproduction of the classic "phenolic ring" tweeter developed by CTS and used by Marantz, Altec, and many others! High efficiency and smooth, extended response. Extremely versatile; great for repairing older systems or for new custom projects. Low-mass paper cone and dust cap, 3/4" voice coil, and stamped steel faceplate. 8 ohm nominal impedance. This is a drop in replacement for the Marantz Imperial Series cabinet speakers models Marantz Imperial 4, 5, 6, 6G, 7, 8, and 9 with common part numbers 137-7348N, 137-7350, 137-7816, and 841-1022 and HLM312A. Also used in Radio Shack Nova series cabinets Nova 7b as well as the Altec Lansing Santana 891 speakers, RSL Rogersound Labs, Acoustic Research AR 4x, Martin Speakers, and Rectilinear XI Cabinets from the 70's.

Specifications: • Power handling: 30 watts RMS/60 watts max • VCdia: 3/4" • Impedance: 8 ohms • Re: 6.9 ohms • Frequency response: 2,000-15,000 Hz • Fs: 1084 Hz • SPL: 90.3 dB 1W/1m • Dimensions: Overall diameter: 4-1/4", Cutout diameter: 3-3/16" (plus notches for terminals), Depth: 1-1/4".

Product Specifications
  • Tweeter TypePaper Cone
  • Cone / Dome Diameter2"
  • Impedance8 ohms
  • Power Handling (RMS)30 Watts
Phenolic Ring Tweeter 8 Ohm
  • BrandParts Express
  • Part Number270-252
  • UPC844632084362
  • Product CategoryTweeters
  • Unit of MeasureEA
  • Product Rating
    (30 Reviews)
  • Weight1 lbs.
  • Case Qty24
  • 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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Phenolic Ring Tweeter 8 Ohm
Phenolic Ring Tweeter 8 Ohm is rated 4.8333 out of 5 by 30.
Rated 5 out of 5 by from Sweet SurrenderReceived yesterday but I believe I've got them broken in already. I remember the look of these tweeters from the old Dynaco series as well as ARs and Advents. Those great vintage speakers were all designed and manufactured around Boston.This copy, I believe, is made in China but really sounds fine. Maybe has a little more sparkle but I don't mind at all. It has brought new presence and articulation to my 10 year old Pioneer 3 ways. It's amazing what a little poly-fill and new tweeters can do.
Date published: 2014-02-28
Rated 5 out of 5 by from Great replacement for my Pioneer S-T100 tweeterCustomer service rep guided me to give this replacement tweeter a try in place of my damaged tweeter (DT-041A) on an old pair of Pioneer S-T100 speakers and it works wonderfully....almost a direct fit entirely. The only adjustment I had to make was putting a spade style connector on one lead as the originals had 2 different style spades to eliminate hooking them up improperly. Sound is comparable and certainly the price was worthy...if you can even find an original Pioneer tweeter replacement.
Date published: 2014-02-26
Rated 5 out of 5 by from exact physical fitI replaced blown tweeters from a 1967 HH Scott 10" cabinet.Pros:- price- quality of sound; more distinct than original- exact fit for this application, otherwise difficult to find- smooth soundCons:-none at this price
Date published: 2013-08-10
Rated 5 out of 5 by from FINALLY available!These were unavailable for years. Had to use various substitutes for my ElectroVoice 210's, none of them as good, for instance, the Goldwood 4" cone (gt-25, #270-018). The phenolic tweeters clearly sound much better, with more detail and smoothness, much less tizz, greater extension into and unity with the midrange, and overall greater musicality. Price is high, though. These used to cost $1.50!
Date published: 2013-07-07
Rated 5 out of 5 by from Perfect replacement for vintage AR speakerThis tweeter fits perfectly in the AR speaker that needed repair after over 25 years of use. The sound reproduction is smooth and clear, void of any harshness whatsoever. Few, if any, replacement tweeters could be as easy to install in the given location at that size, and on top of that, the highs in music and voice blend seamlessly with the stock mids. If you need an exact replacement tweeter for some old AR speakers, this is the one to purchase.
Date published: 2013-08-10
Rated 4 out of 5 by from Manufacturing DefectOne of the drivers of a pair I received had a defect. The phenolic ring was not glued completely to the frame and exhibited a noticeable buzz. Customer Service advised me that they would ship me a replacement at no charge (which they did), to just keep the old one. How can you beat service like that!!! Driver replaces AR-4x tweeter, is more efficient/bright but with an added external 3rd terminal you can experiment with various resistors with drivers mounted and box intact.
Date published: 2013-03-16

Product Q&A

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Phenolic Ring Tweeter 8 Ohm

phase question

Thanks for the advice on this speaker as a replacement for the tweeter in my old proton 300 table radio. however I have one question:Is there an in phase / out of phase issue with connecting the speaker wires when replacing the tweeter?
Asked by: rupert
Audio is AC current if you saw it on a scope, it would look like an "S" on it's side. It goes from -0- to some value of positive, back to -0- to some value of negative and back to -0-. If this happened 100 time in a second it would be 100 Hz.The polarity or hook-up phase is to insure that when a positive signal is applied across the speaker terminals that the speaker moves forward. If speakers are connected out of phase or polarity then the sound a speaker produces can be in part cancelled by the adjacent speaker move from forward to a neutral or rearward position. There is no damage done to a speaker or an amplifier when polarity is switched.If you can not determine the proper polarity, simply connect the speaker and listen to the sound. If it isn't quite right then reverse the wires.What I am more concerned about is that you said it is an older radio. Very old tube type radios used to use some uncommon impedence values for speakers to create a load characteristic for the tubes used in the amplifier. 16 ohm, 32 ohm and even impedances in the 90's are found in some circa 1940's radios.If your radio is looking for a 32 ohm speaker then damage to the tubes (if applicable) could result. You could research your radio online to determine info about it's design and operation. If the old speaker has 8 ohms printed on it, then all is OK.
Answered by: Nitnub
Date published: 2012-09-01

klh compatibility

has anyone used these to replace klh model 17,20,5, or 6? if so, how do they compare? any changes to crossover values? the size of emplacement or fitting is not an issue since i can make adjustments. thanks.
Asked by: 3406E
It would be my oppinion that this Phenolic Ring Tweeter (8 Ohm)these would be very close to the OEM speakers in your KLH speakers.KLH brought out their series of bookshelf and smaller floor speakers originally back in the mid to late 60's. Over the years they really didn't change alot in the mid and high end area. They always were a transparent open sounding speaker and the phenolic ring tweeter was present in nearly their entire line-up. The only consideration is 2 way or 3 way. They used a crossover point of around 1200Hz in the 2 way and they had power handling capacities of around 45 watts rms. In their 3 way they used a variety of mid range speakers, most were closed back vented type and the cross points were about 900 Hz and 3kHz. These speakers increased power handling to 50 watts - 100 watts rms.I would think that as a direct replacement speaker that it should be very similar in sound to the OEM. If you notice any difference in sound, then replace the tweeter in both or all of you KLH speakers with the same Phenolic Ring Tweeter.If you desire more edge to you high end, consider adding a piezo to each speaker as well. KLH was an east coast speaker company and as a result they designed for smooth transient and more mellow mids and highs.
Answered by: Nitnub
Date published: 2011-08-13

Impedence chart?

Is there an impedence chart available for these tweeters? I want to simulate a crossover design before buying.
Asked by: Bilbo
Gee. sounds like a lot of work. The impedance does not change all that much v frequency in wire/foil-coil speakers. Piezo tweeters on the other hand, are all over the place and best to use a "ballast" reisitor in parallel and cap filter in series.The human-audio spectrum does take awhile to understand: 90% of all music frequencies are produced by tweeters crossed-over at 1KHz. Mids range is 2500 down to 200, and bass 500-50, subs 80-20 [cannon fire is 9hz, is the benchmark for LFE design, and can be costly to acheive].I went thru all that fussing with simulations, too. Speaker technology has so advanced: they are made with better materials and manufacturing techniques, ergo, more power handling & wider frequency response. Then I decided, since I am not designing speakers for sale [re-inventing the wheel], to just buy speakers and try them in my projects [use the force]. I refer you to a cross-over chart on-line [google] to select the requency and components you may need to tailor the sound to the speaker spec.You will be surprised and satisfied with your results without all the fuss. Have fun!
Answered by: Fanden
Date published: 2013-09-11

Off-axis response

How good is the off-axis response?
Asked by: JonnyB
I am proud to say that in 1973 I purchased a pair of Altec Santana speakers. This ring tweeter is a designed direct replacement and I believe it is an exact match. My Altec's a respectable SPL of 88.8 db 1/1m @ 145 degrees off axis. At my normal listening level of 60% output from a Marantz 2270 receiver @ 10 m it 88.5 db @ 145 of axis. This is a clear, clean, open and transparent speaker worth twice the price.
Answered by: Nitnub
Date published: 2012-12-08

Use in a car in 2-way components?

I'm considering using these in a 2-way setup in car doors. I have a 4ohm amp and would run these tweeters in parallel with 8ohm woofers. The amp's output is 87Watts RMS per channel. I'd cross these tweeters at around 2.5-3kHz. The woofer has a sensitivity of 89dB. Would these tweeters do well in this setup and environment?
Asked by: JonnyB
I see no reason that you cannot use this in an automotive environment. BUT- you are not thinking correctly on terms of impedance. When you have 2x 8 ohm drivers and a passive xover between tosend treble to one and bass to the other, you get 8 ohms above and 8 ohms below the xover, if it is optimally designed. If it were a 4 ohm tweeter, you'd have 8ohms below xover and 4 ohms above xover. This is of course if there are no other passive components used for attenuation or such and that the xover sums optimally. Add components and this answer may change.
Answered by: Wolfy
Date published: 2013-02-18

Replacement for Cambridge Soundworks New Ensemble 2?

The CSW specs state it is a 1.75 inch direct radiator (cone) tweeter with 0.6 integral dome. It looks a like this phenolic tweeter but the flateplate shape (at width) is 3.5 inches (rounded edge) but the height is 2.5 inches (flat). Can the face plate be cut to fit? Thanks.
Asked by: JhonBee
Unfortunately this will not work well for that application, the magent is too large to be able to cut the faceplate this small. Usually with an application like yours, you will have to fill the opening with a black sheet of plastic or wood and cut a smaller hole for a smaller flange tweeter.
Answered by: MattP
Date published: 2013-05-20

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