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Phenolic Ring Tweeter 8 Ohm

Overview
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!
Highlights
  • 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 # 
270-252
Weight: 1 lbs.  
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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.



Product Specifications
  • Tweeter TypePaper Cone
  • Cone / Dome Diameter2"
  • Impedance8 ohms
  • Power Handling (RMS)30 Watts
  • Frequency Response2,000 to 15,000 Hz
  • Sensitivity90.3 dB 1W/1m
Thiele-Small Parameters
  • Resonant Frequency (Fs)1,084 Hz
  • DC Resistance (Re)6.90 ohms
Mounting Information
  • Overall Outside Diameter4.25"
  • Cutout Diameter3.19"
  • Depth1.25"
Phenolic Ring Tweeter 8 Ohm
  • BrandParts Express
  • Part Number270-252
  • UPC844632084362
  • Product CategoryTweeters
  • Unit of MeasureEA
  • Product Rating
    (36 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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Reviews

Phenolic Ring Tweeter 8 Ohm
Phenolic Ring Tweeter 8 Ohm is rated 4.8611 out of 5 by 36.
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: 2014-02-27
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: 2014-02-24
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: 2013-07-09
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: 2013-05-14
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: 2013-04-19
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: 2013-03-15
Rated 5 out of 5 by from Phenolic Ring Tweeter 8 OhmI bought a pair of these to replace the 50+ year old tweeters on an RCA New Orthophonic phonograph. They are a perfect physical match with no mods needed. The improvement in sound is phenomenal!
Date published: 2013-02-18
Rated 5 out of 5 by from Excellent purchaseThanks for all you help. Best purchase online. You gave an excellent service.
Date published: 2013-01-21
Rated 5 out of 5 by from Excellent DLK 1 1/2 replacement.Excellent driver to replace fried or damaged stock unit., and at a bargain price.Not all 1 1/2's used 4 ohm units, so get a DVOM and measure the good one (if possible).Add a Dayton poly cap, and some new damping material-reseal with P.E. speaker gasket, and your done.Really amazing how well this tweeter design has held up over the years.Smooth and detailed, with great dispersion behind the stock foam grills.If your's sounds hard or is honking, make sure you replace the old cap, as this tweeter should sound very good with the DLK woofers.
Date published: 2012-12-20
Rated 5 out of 5 by from Phenolic ring tweetersI put a pair of these in a custom enclosure I designed.I am happy with them.They are different from my other tweeters. I like to hear different versions and designs because I experiment. These seem a bit brighter to me than the Dayton silk domes or the 34 dollar Morels I bought here. I am going to order L pads. But I like these a lot. I would not remove them because they are unlike my other tweeters. I used a 2.5 K Dayton crossover with this pair,I may order a 3 K for a test. I keep extra parts to try to maximize each speaker pair.But if I wanted laid back high range I would use the Dayton silk domes or the Morels. I would not be happy without these phonoclic rings though.I think they sound best with horns and Jazz. But when I add L pads they will be slightly subdued . They are good quality and I enjoy the sound.
Date published: 2012-09-14
Rated 5 out of 5 by from Surprise! Surprise!...Perfect For DLK 1 1/2 AR Advent & Other 70's Sealed Systems!I am currently rebuilding a DLK 1 1/2 Acoustic Suspension system from the 70's. This phenolic ring dome tweeter far surpasses expectations while not being overly bright. In fact...it beats the pants off of the more expensive Dayton soft dome types that have that stupid ringing effect at 2 KHz in two way systems. Fed-Ex 2-Day got it to my doorstep quickly.Smooth....smooth...SM-OO-OOTH!!! I'm gonna finish the project with two GRS 8" Paper/Foam Ribbed woofers Parts Express sells for 8 bucks apiece and have high expectations. DO NOT use the Classic Dayton Woofs in these. I found out the hard way!These tweeters are exact replicas of what DLK used originally in the 1 1/2 system except that these are rated at 8 ohms as opposed to the original's 4 ohm rating...NOT A PROBLEM!!!And do not let that low price of seventeen bucks fool you. I've been an audioholic for well over forty years and can tell you that there is something to be said for the phenolic ring tweeters used by Advent and DLK. It just goes to show you that you do not have to spend big bucks for top audiophile sound. Also...do not let the thirty watt rating discourage you either...these gems can handle power without breakup or compressing.Transient response is superb! Plus...no phony brilliance but very extended response within the audible range. Cymbals sound like cymbals...not smeared. Dispersion and depth is extremely wide for older recessed cabinet types. Just make sure you replace your worn out leaking aged crossover capacitors with Dayton polypropylene ones from Parts Express. This plus these gorgeous low cost tweeters will fully restore your highs to their natural full beauty!P.S...Thanx BIG TIME...Parts Ex!!!!
Date published: 2012-06-16
Rated 3 out of 5 by from Too bright for AR-4xa'sI bought these to replace the bad tweeters in my AR-4xa's. The decision to purchase them was based off reviews from people that had used them in AR-4x's. Crossovers are similar so I took a chance. I should have read the reviews more closely as one person described them as having added sparkle. In my speakers that sparkle was a bright and harsh. I'm sure I could have tamed them with crossover mods, but I took the lazy way out and swapped in some Dayton DC28F-8's from another project. They now have that mellow east coast sound that I love so much. The Daytons don't look very retro but the sound sure is. Hopefully the Phenolic Ring Tweeter will work out in a future project.
Date published: 2012-06-08
Rated 5 out of 5 by from Love these Phenolic Ring Tweeters!I grew up in the 60s and 70s when these type tweeters were common. They sounded great then and sound great now. I have never found another dynamic tweeter I thought sounded as good. I am really happy to see them again. The replica is not exact, though performance is all there. I use them in a cabinet with a duel 6" wofer, and a 2 way crossover at 3200 hz. they are really impressive. sound as good as the originals from the 70s.
Date published: 2012-04-29
Rated 5 out of 5 by from Great ReplacementI bought a pair of these to replace the ones in some large vintage Altec Santana speakers and they fight just right. The sound is great. Tech support was helpful.
Date published: 2012-04-19
Rated 5 out of 5 by from Great Speakers!I bought these tweeters to replace an old parrallax cabinet speaker system. After checking the specs out ,ohms ect I found these to be the perfect tweeter replacment for my 3 way cabinets.They sound better than the day i bought them ! I highly recomend them for the Quality and great value ,and also the perfect pitch that comes from them!
Date published: 2012-04-08
Rated 5 out of 5 by from Did the job... Really well!I bought these as a replacement for the tweeter on my AR 4x. I replaced both after one of the originals went bad. I also jumped the pot on both speaker assemblies. The sound is surprisingly good, and I was very happy that the bolt hole's matched perfectly too. I had to plug the hole that wire terminal bracket attaches to the driver, but I wasn't put off by this slight variation from the OE tweeter. Yes, you can find some on ebay, but with PE you get customer service if you need it, and some kind of warranty.
Date published: 2012-04-02
Rated 5 out of 5 by from YES,YES,YES,YES,YES,YES,YES,YES,YES,YES,YES, !!!!!!!!!!!!!This baby made my day because it is an exact,exact replacement for my late dad`s KLH`s These brought tears to my eyes. Only Parts Express can make good things like this happen. THANK`S AGAIN !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Date published: 2012-03-25
Rated 5 out of 5 by from Work GreatDrop in replacement in a pair of RSL 3300 Monitors. Wish they had the foam damper like the originals but no matter. Brought the high end back to life. That and a coat of flat white paint and the speakers look and sound like the day I bought them down in So.Cal.
Date published: 2012-02-13
Rated 4 out of 5 by from Nice Little Sounding SpeakerI used these as a replacement for my Optimus 7 speakers. Not a perfect match but still they sounded very nice. I think an equalizer to bring up the upper end from my amp would help. It may need a slight crossover tweak. Still that is no fault of these nice little speakers. I highly recommend them. I also tried the Dayton DC28FS Silk Dome but it was a bit too muted for my taste (at least for my application).
Date published: 2011-12-16
Rated 5 out of 5 by from Great Old Stock ReplacementsThese are replications, not original old stock. Good job. I dropped these in as replacements in my AR-3's purchased in 1963. Thank You, Henry Kloss !!, they still sound wonderful. High frequency repro improved dramatically - especially intonation. I can make distinctions between similar instruments in the high registers. Had to remove the old pad and modified the #260-230 crossover mid and hi level output for broader bandwidth. I plan to use them as replacements for my Sansui 350's purchase in Japan in 1968. Highly recommended for those who are looking for a subdued but very precise high frequency response.
Date published: 2011-11-03
Rated 5 out of 5 by from 3 pairs of Altecs ...Recently, a friend brought me some speakers I had 30 years ago and had left in his basementm he'd used them until the surrounds fell apart, threw away the Altec woofers and even replaced some with car speakers. Tweeters were shot. I ordered several surround kits and redid them myself, ordered Goldwood replacements (again through Parts express). Before i found Parts express i ordered two pairs from Dynaco, but what came weren't even close to looking right. Then i picked up a pair of Santana's pretty cheap, kid had poked one woofer (probably with a screwdriver) and both tweeters were shot. I used some of the surround glue and sealed up the puncture wound, and put the Dynaco tweeters (1 pair) in them. At the time iIordered 4 tweeters (the right ones) I also ordered 6 of the 2-way crossovers and installed them in all 3 pairs. I need to order another pair of these for the Santana's just to get them 'right'.The sound is good, clean. This was a very good buy.
Date published: 2011-10-05
Rated 5 out of 5 by from reason these were used by Marantz, Altec, etc.!!warm, full sound. Like the vintage sytsems of the '60's.Why not, they're the same speaker. Wish the SPL was a tad higher but, can't have everything. I dropped the rating for features down because; don't forget to caulk the pop rivet that holds the board for the wiring tabs. Else your cab. will have a leak.
Date published: 2011-09-06
Rated 5 out of 5 by from Another winnerGreat drop in replacement for dead / dying AR4x tweeters. After 40 plus years those old tweeters don't owe us a thing. This little guy bolts right in and takes over the tweeter duties on the 4x very nicely IMO. It may not sound exactly the same as the original, but it doesn't leave any obvious holes in the sound and I find it very pleasing overall. No crossover tweaks needed, another plus.
Date published: 2011-08-31
Rated 4 out of 5 by from restored my vintage ar4xi'm so happy these tweeters are 100% fitted to my ar4x speaker and sound beautifully than i expected. i've been tried many other tweeters before but no one can match the acoustic research speaker need until i found these two..they are now working like new, thankyou
Date published: 2011-08-12
Rated 5 out of 5 by from Great sounding tweeters.These sound so much better than a old set that I got from Radio Shack many years ago. Very very clear sounding... I'm thinking of replacing my old ones with these..
Date published: 2011-03-14
Rated 5 out of 5 by from Money well spent!This is my kind of tweeter. I could buy a case of these and still want more. Response is very good. I've crossed these as low as 1.7K with good results. Great for use in a two way setup.
Date published: 2011-03-04
Rated 5 out of 5 by from WOW! WOW! WOW!I can not believe the sound comming from these speakers and neither can my friends. OK here's the deal.....I had an old pair of Technics SB-L31, The woofer and tweeters were shot. So I order these tweeters and also the realy cheap price woofers (GRS 8PF-8-8") stock # 292-408. The only modification was a notch I had to cut for the tweeters, they both drop in and I did not change the cross over. OK they do lose a little in the bass range, But WOW! When it comes to voice and strings...............It sounds like they are in the room with you. My wife and I are having fun listening to James Taylor, Cat Stevens and groups like Trio (Dolly Parton, Emmy lou Harris and Linda Ronstadt) and even the Allman Brothers. Wow what fun, Thanks Parts Express!
Date published: 2010-11-15
Rated 5 out of 5 by from Well worth the cost.I use these tweeters with a 2.2 mfd capacitor to augment the highs of each of my 1965 Knight/Allied full range speakers. For the low cost of these cones they are perfect for the job.
Date published: 2010-03-24
Rated 5 out of 5 by from Replacement tweeters in my AR 4x SpeakersAll I can say is Wow. I was afraid a first to replace the old Tweeters but the imaging is nice. They have a sparkle to them. I have used them in four speakers so far so I'm satisfied with the results.
Date published: 2010-02-11
Rated 5 out of 5 by from Very impressive, improved speaker's soundstageI restored a vintage speaker pair with blown tweeters. I saw this classic reproduction advertised and decided to try it. It is not the most efficient tweeter on the market. The lower frequencies (below 6KHz) are sweet and full, the high end is subtle yet has remarkable presences. A pleasant alternative to the average bargain harsh, bright competition.
Date published: 2010-01-30

Product Q&A

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Phenolic Ring Tweeter 8 Ohm

Will this tweeter work in the Realistic MC1000?

Asked by: jtimothy
Good question. If the original tweeter is 8 ohms and the cabinet has a cutout of ~3-1/4" or can be modified to accommodate this, yes this tweeter will work.
Answered by: MattP
Date published: 2014-04-04

Hi  What is the PCD of the mounting holes Thank you

Asked by: jross
The mounting holes are 3-15/16" on center.
Answered by: MattP
Date published: 2014-01-20

Will these work as a replacement for Bose 301 series 1 tweeters? I contacted Bose customer support and they don't sell replacements and wouldn't give advice on other replacement options...

Asked by: Yopmo
This depends on a few things, the mounting dimensions (hole size etc.) and where the original Bose tweeters were crossed over. If you could email our tech department at tech@parts-express.com with pictures or capacitor values, we can help you further.
Answered by: MattP
Date published: 2013-12-04

Where are the rest of the specifications, the Qes, Qms, Qts, ???

It would be nice to have them for designing a good anti-resonant notch filter. Thanks, ahead of time.
Asked by: TehnoBoomer
I think the best you can do is design around the frequency chart, build it then analyze the performance and use a notch filter where needed.
Answered by: Nitnub
Date published: 2013-10-20

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

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
NO !!!!!!! Do not use this in a car, this speaker is designed for indoor use.
Answered by: Booth man
Date published: 2013-08-10

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: 2014-05-16

I have a set of Ohm Model E speakers that need tweeters. I was given the speakers without tweeters - just hole. Would this be a good replacement ?

I found an image of Es that look exactly like mine except they of course have tweeters.
Asked by: stignasty
Unfortunately, we do not have any kind of cross-reference by brand, model, or anything of the sort. If your cutout will accommodate this tweeter (or you're willing to modify the enclosure accordingly), and the impedance matches the original tweeter, these should provide good performance. This tweeter is designed for speakers of that era.
Answered by: RussR
Date published: 2012-06-02

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

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

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
Regardless of the proper theory, or what is considered to be technically correct, connecting a speaker in or out of phase will not damage anything. I always suggest trying it both ways, and the way that sounds best to you individually is the right way to connect the speaker.
Answered by: RussR
Date published: 2012-09-01

tweeter replacement for proton 300?

hello,this tweeter is to replace a tweeter in an old Proton 300 table radio. the tweeter is marked:8 ohms10 wjapan153TNYthe actual diameter is 3 7/8 inches, 3 3/8 inches between the holes opposite each other.thank you
Asked by: rupert
I don't believe this would be a direct "drop-in" replacement for your tweeter, although it could probably be made to work. The overall diameter of this tweeter is 4-1/4", so it will be a bit larger than the tweeter you have to replace.
Answered by: RussR
Date published: 2011-06-12

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