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Old 16th September 2002, 11:42 PM   #1
skaara is offline skaara  Slovenia
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What companies that are making high sensitive speakers do you recommend? What speakers are you using?
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Old 17th September 2002, 12:07 AM   #2
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Lately my favorites have been:

TAD, for the big buck crowd,

PHL for the slightly less wealthy

Polydax Pro, for slightly less $ yet

Fostex for the budget minded

Beyma and Selenium instead of beer.




And of course the ever popular Altec 604's
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Old 17th September 2002, 01:23 AM   #3
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Quote:
Originally posted by Nelson Pass
TAD, PHL, Polydax Pro (aka Audax), Fostex, Beyma and Selenium instead of beer.
...
And of course the ever popular Altec 604's [/B]
A good list... the 604s also remind us that there is some nice vintage stuff out there. Triangle, and Eminence (as in things like the Adire HE10) should also get a mention.

dave
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Old 17th September 2002, 01:52 AM   #4
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I would have to add JBL to the list behind TAD, but that’s me. And if you talk about sensitivity, you have to include horns.

Rodd Yamas***a
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Old 17th September 2002, 02:31 AM   #5
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I like Triangles too. And don't forget about Fertins (if we can trust dice45).
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Old 17th September 2002, 03:17 AM   #6
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Quote:
Originally posted by Peter Daniel
And don't forget about Fertins (if we can trust dice45)
Brian Cherry's initial reaction to his are also very positive.

dave
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Old 17th September 2002, 04:10 AM   #7
Variac is offline Variac  United States
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Ok Nelson (and everyone else) I've got my Selenium 15" driver for my beery bass.
Now for the higher notes:
Anyone heard the PHL 1240 TWX 7.5" that has a coax tweeter? only $160!!
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Old 17th September 2002, 05:52 AM   #8
Variac is offline Variac  United States
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Zylatron has 'em on their web site

P-10:

How about a bipolar speaker? The PHL 1240TWX (with tweeter) faces forwarda plain PHL 1240 faces back.

The 1240 has 93 dB efficiency, the tweeter is higher.So if I have one forward and one back will the efficiency be 96dB for the 1240's ? Solves the bafffle step issue, right?, but does it also increase efficiency in the midrange also?

Second possible approach: I'm planning on getting a Fostex FE206 to make a varient on the Basszilla (instead of the FE208)
The driver is mounted in an open baffle. Will the PHL 1240TWX work in an open baffle instead? ( with a crossover to the tweeter of course) but I'm wondering if the compliance is good for open baffle. I assume you can't use too compliant?

Ok another question: What if I mount a 1240TWX AND a 1240 in a vertical array facing forward on an open baffle? Double the efficiency to 96 (the same as the Selenium woofers) Does the tweeter being in the center of one driver screw things up? Obviously not a D'Appolito, but the drivers don't have a tweeter keeping them apart. suggested crossover is 3k.
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Old 17th September 2002, 07:07 AM   #9
skaara is offline skaara  Slovenia
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Thanks for replies...
Whats with horns, why are they so efficient? Dont they make some distortion, how are they made?
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Old 17th September 2002, 07:48 AM   #10
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Quote:
Originally posted by Variac
How about a bipolar speaker? The PHL 1240TWX (with tweeter) faces forwarda plain PHL 1240 faces back.
Sounds like a plan.

Quote:
The 1240 has 93 dB efficiency, the tweeter is higher.So if I have one forward and one back will the efficiency be 96dB for the 1240's ? Solves the bafffle step issue, right?, but does it also increase efficiency in the midrange also?
93 dB measured into 2pi space. As soon as you wrap into 4pi space they go down to 87 dB (ignoring room lift). A bipole would be 93 dB all the way up - it is always radiating into 4pi space. You gain some with 2 drivers in a room.

Quote:
Second possible approach: I'm planning on getting a Fostex FE206 to make a varient on the Basszilla (instead of the FE208)
The driver is mounted in an open baffle. Will the PHL 1240TWX work in an open baffle instead?
The Q is similar to the Fostex. Should come close to filling the same role.

Quote:
Ok another question: What if I mount a 1240TWX AND a 1240 in a vertical array facing forward on an open baffle? Double the efficiency to 96 (the same as the Selenium woofers) Does the tweeter being in the center of one driver screw things up? Obviously not a D'Appolito, but the drivers don't have a tweeter keeping them apart. suggested crossover is 3k.
You'd have to add BSC so you might as well build a bipole (if your room supports it).

dave
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Old 17th September 2002, 08:24 AM   #11
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Quote:
Originally posted by Nelson Pass
Lately my favorites have been:
TAD, for the big buck crowd,
PHL for the slightly less wealthy
Polydax Pro, for slightly less $ yet
Fostex for the budget minded
Beyma and Selenium instead of beer.
And of course the ever popular Altec 604's
Good list, and I would add
Radian compression drivers, 475 1" (exceptional) and 850/950 2"
P.Audio BMS450
JBL 2446, especially with the Radian Al diaphram
Fane ST5022
BMS 4590 (incredible)
Beyma 380 1" CD is one of the sweetest drivers you'll ever hear
McCauley, excellent and not too expensive
JBL Pro drivers
Many Eminence drivers: cheap as dirt for the performance you get
ATC. Big $
Volt radial bass drivers. Not tried them but look excellent. Also big $
Lowther. If you like that sort of thing.

Cheers
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Old 17th September 2002, 08:34 AM   #12
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Quote:
Originally posted by skaara
Whats with horns, why are they so efficient? Dont they make some distortion, how are they made?
Horns are acoustic transformers, and work by taking a high pressure smal displacement signal at the throat, into a low pressure larger displacement by the mouth.

Properly designed and implemented, horns will have lower distortion, especially in domestic use.

Horns are made by taking a driver, either a conventional cone, or a specifically designed compression driver, and coupling it to a 'flare' or horn. Apart from CD's, many cone drivers do not work well into horns as their designed T/S parameters are all wrong for that application.
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Old 17th September 2002, 08:45 AM   #13
Variac is offline Variac  United States
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Dave BSC = baffle step correction I assume. Actually I cross over to the 15" woofer which is in a bass reflex box at the point that the baffle stops working so I don't think I need BSC.

OK does anyone opine that the PHL sounds better than the Fostex? It appears that Nelson might, but I think he is talking about the bigger PHL woofers.

I would be tempted to add a super tweeter to the Fostex FE206 which would probably screw up its coherency. The PHL would allow me to have the tweeter concentric. I suspect that the tweet is an audax unit.

OK, I'm tempted to do the open baffle. (buck up Dave!) PHL has a recommended crossover design. Is there any advantage to having the woofers right next to each other? or do they need to be spaced apart? The crossover freq is 3khz. I know in MTM arrangements the spacing matters-right? This would be more like an TMM
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Old 17th September 2002, 09:28 AM   #14
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Quote:
Originally posted by Variac
Dave BSC = baffle step correction I assume. Actually I cross over to the 15" woofer which is in a bass reflex box at the point that the baffle stops working so I don't think I need BSC.
That is a form of BSC. Put the XO at the BS freq and bi-amp.

Quote:
The PHL would allow me to have the tweeter concentric. I suspect that the tweet is an audax unit.
I wouldn't doubt it. PHL is descended from Audax Pro.

Quote:
OK, I'm tempted to do the open baffle. (buck up Dave!)
Open baffles are good, fairly easy. Just watch you don't get addicted/

Quote:
Is there any advantage to having the woofers right next to each other? or do they need to be spaced apart? The crossover freq is 3khz. I know in MTM arrangements the spacing matters-right? This would be more like an TMM [/B]
If they are covering the same freq the want to be as close (relative to the highest frequency they reproduce).

dave
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Old 17th September 2002, 04:01 PM   #15
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I plan to use eight of these ribbons (without waveguide),
103db (isodynamic actually)
with PHL2520 8" midrange, 100db sensitivity in a small line array
with dual Lambda 15's, then add a 15" or 18" sub = per cabinet

http://www.stageaccompany.com/cdload.html

Upon testing 1 tweeter and 1 midrange I can feel the
cement floor in the garage vibrate and you can feel
the sound penetrate thru your torso with this combination.
So far, this is the best combo that meets my crazy needs
without resorting to prosound horn loaded solutions.
A middle ground between prosound impact and audiophile
quality.

The drawback to achieve this awesome combo is cost,
a big price to pay for a crazy hobby.

Can't wait to hear 8 tweets and 8 mids - hehe

Patients yung jedi...
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