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Suggestions for small high eff tweeter

75.111.0.214
Posted on April 16, 2015 at 08:54:25
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004
 I havea custom made cabinets with 15" eminence woofers and EV 1823 driver horn loaded midranges. The original Ev horn tweeters are gone and seem pricy to me for their rep. I tried a 89db rated dome tweeter, and it is very rolled off. I have a single foster horn tweeter that is much brighter, so i am assuming this is a efficiency issue. Any suggestion on replacement tweeters in the $50 or less price range? The opening in the baffle is 2.25 x 6". Thanks.
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

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RE: Suggestions for small high eff tweeter, posted on April 18, 2015 at 07:17:13
Rpower
Audiophile

Posts: 280
Location: Northeast Georgia
Joined: October 27, 2000
 I looked up your EV 1823 midrange, but the sensitivity rating is not to modern standards (58db?). I would suggest the Eminence APT series of tweeters which are good quality and well within your price range. You might be able to use the horn that is on the EV tweeters that you are replacing. If not, the Apt drivers will take any standard 1" screw on horn, so you should be able to find a replacement horn that fits your cabinet cutout. You could also wire in an L-pad and adjust the level on the APT tweeter or even the Foster tweeter that you now have to match the EV mid and woofer. My 2 cents.

 

RE: Suggestions for small high eff tweeter, posted on April 18, 2015 at 08:15:46
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004
 I saw that 56 db stat as well and it did not make sense. I would say these are in the 90's db range. Since I posted, I bought a pair of 1" fosters with 4x7 horns for 30 dollars. I suspect I will pad them down or put in an in line cap as fosters are typically super efficient.
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

RE: Suggestions for small high eff tweeter, posted on April 18, 2015 at 09:38:06
Paul Eizik
Audiophile

Posts: 2120
Joined: September 15, 2001
 Sanman

The 58 dB spec was likely the old RETMA spec which was derived differently form the modern 1 Watt @ 1 Meter spec. The 1823 should be about 105 dB. The 1823 had a copper voice coil, while the 1823M had an aluminum voice coil so it went higher. Finding a tweeter which will go low enough to mate well with the 1823 for under $50 is a tall order. It should be interesting to see the suggestions offered here. Expect the sensitivity specs among lower priced horn tweeters to be inconsistent and frequently wildly optimistic.

Paul

 

RAAL nt, posted on April 18, 2015 at 11:35:30
Caucasian Blackplate
Industry Professional

Posts: 8313
Location: Seattle
Joined: June 18, 2004
 nt

 

49.2dB, posted on April 18, 2015 at 21:47:10
djk
Manufacturer

Posts: 6135
Joined: June 17, 2000
 1mW at 30, add 49.2dB to get 1W/1M.

 

RE: Suggestions for small high eff tweeter, posted on April 19, 2015 at 04:29:51
thetubeguy1954
Audiophile

Posts: 6112
Location: Orlando, Fla
Joined: January 7, 2001
 Knowing what sensitivity rating you're interested in and whether you meant $50 for the pair of tweeters or $50 each would be a big help my friend...

But as a suggestion: here's a pair of Pioneer Bullet tweeters that might just fit the bill of working with those with 15" eminence woofers and EV 1823 driver horn loaded midranges you're speaking about! Best part is these Pioneer CS-77 tweeters are only $14.95 right now!


Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers


 

RE: Suggestions for small high eff tweeter, posted on April 19, 2015 at 08:28:11
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004



Thanks for the tip. The sensitivity of the midrange is over 100db from what I have gathered here. Also, yes, I meant 50 for the pair, I know that is kinda low these days. I picked these up recently on e bay, they haven't arrived yet. Fingers crossed!

"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

I like - and use - a pair of these, posted on April 19, 2015 at 18:52:03
mhardy6647
Audiophile

Posts: 16013
Location: New England
Joined: October 12, 1999
Contributor
  Since: October 23, 2016

With my Altec Duplexes. First order XO, very high (like 10k Hz high) -- and an L-pad to, well, you know, pad it to just the right amount of sparkle. Best I've done to date to extend the HF of a pair of 604Es unobjectionably (is that a word? The spell-check doesn't think so)

... oh, and boutique, audiophile clip leads, too... of course ;-)


all the best,
mrh

 

RE: RAAL? Nt, posted on April 19, 2015 at 19:27:35
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004
 X
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

RE: Suggestions for small high eff tweeter, posted on April 20, 2015 at 08:20:28
Hornlover
Manufacturer

Posts: 2529
Joined: March 8, 2002
 EV used the old method of 1mW at 30 ft.

 

RE: Suggestions for small high eff tweeter, posted on April 20, 2015 at 13:16:32
deathtube 667
 I use Foster 025N03 horns on top of 811B/808-8A.

They look similar to your horns.

I crossover 1st order at 13K cycles.

With active EQ, they go out to -3dB @ 17K cycles in room at my listening position.

Plenty of top end and these were not expensive, about $30 off ebay.

 

Run!....., posted on April 20, 2015 at 15:22:07
Scholl
Distributor or Rep

Posts: 1357
Joined: March 8, 2001
 Do not walk! Do whatever you can to replace the L-pad with decent resistors ASAP!

They suck!

 

Agree! Or..., posted on April 20, 2015 at 15:39:27
amandarae
Audiophile

Posts: 2591
Location: So.Cal
Joined: November 30, 2004
 ...use a Fostex L-Pad! IMO better than the cheap ones, but composite(resistors) are best
. The "decision maker" for me was convenience in exchange for sacrificing a little sparkle. There are some recordings or music genre where I want to have the HF a bit hotter than what my current adjustment have, and it will be difficult switching discrete resistors for that every time I want to adjust it.

So I choose the L-Pad from Fostex.

 

RE: Run!....., posted on April 21, 2015 at 03:23:58
b.l.zeebub
Audiophile

Posts: 9361
Location: 52deg 28'N,1deg56'W
Joined: April 17, 2006
 Technically that is a variable L-pad and if you replace that with resistors you have a fixed L-pad.
It is called an L pad because the two resistors needed form an L shaped circuit around the driver. There are also T pads, C pads, H, Pi and Box pads, all named after the shape the form in the circuit diagram. They are all types of attenuating or filtering circuits which keep the impedance as seen by the amp the same.

 

RE: Run!....., posted on April 21, 2015 at 06:46:42
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004
 Interesting, I did not know that and assumed it meant loudness. Anyway, i assume you guys don't use tone controls?
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

A friend "lent me" a pair of rola/celestion, posted on April 21, 2015 at 07:19:09
sanman
Audiophile

Posts: 1780
Location: Redwood Coast
Joined: November 13, 2004
 Vintage fiber cone tweeters. Wonderful tone. Maybe a tad loud but easily fixed by lowering the mid and treble on my preamp a notch. Maybe he'll trade me for something...i doubt the fosters coming from ebay will be as nice.
"When the demon is at your door, in the mornin' it won't be there no more"
Steely Dan

 

RE: Run!....., posted on April 21, 2015 at 15:10:29
b.l.zeebub
Audiophile

Posts: 9361
Location: 52deg 28'N,1deg56'W
Joined: April 17, 2006
 My speakers are active and I just use the gain controls on the crossover or the amps so no need for pads or tone controls.

 

sooner or later, I shall so do..., posted on April 21, 2015 at 18:25:13
mhardy6647
Audiophile

Posts: 16013
Location: New England
Joined: October 12, 1999
Contributor
  Since: October 23, 2016
 I tend to move a little slow...

I am not unhappy with what I am hearing, so I am not in a huge hurry (even though my plan has long been to do just that).

Fortunately I think the system's rescued by synergy between the cheap L-pad and the audiophile clipleads.

;-)

all the best,
mrh

 

RE: Suggestions for small high eff tweeter, posted on April 22, 2015 at 10:42:15
Ed Sawyer
Audiophile

Posts: 2595
Joined: November 3, 2000
 I like the Fostex as well, but find the T-90 a bit shrill. T-925 or T-900 preferably, Or T-500 if you are feeling flush. ;-)

 

RE: I like - and use - a pair of these, posted on April 22, 2015 at 17:53:54
thetubeguy1954
Audiophile

Posts: 6112
Location: Orlando, Fla
Joined: January 7, 2001
 What model are those? I use the T-900 which I really like!


I'm listening to: Holland by The Beach Boys





Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers


 

RE: Agree! Or..., posted on April 25, 2015 at 08:04:26
Scholl
Distributor or Rep

Posts: 1357
Joined: March 8, 2001
 IS it this one? They're the same bad sounding devices as the 8.00 jobs but at 4 times the price. If so, get rid of it now.

I spend over a year wrangling with my tweeters and once the L-Pad was replaced with resistors the sound was greatly improved.

 

The T90s were all I could afford (well, justify the affording of) :-) (nt), posted on April 25, 2015 at 12:51:46
mhardy6647
Audiophile

Posts: 16013
Location: New England
Joined: October 12, 1999
Contributor
  Since: October 23, 2016
 nt
all the best,
mrh

 

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