Midrange compression drivers

[Stupinder]

Just in the planning stages for some a horn project and the budget is leaving me around 250 quid for midrange comprssion drivers when everything else is taken into account. Clearly this leaves the likes of BMS completely out of the window for the time being. Is this doable, even second hand?

Suggestions of what to look out for?

ta

 

[jonjin]

what frequency do you need to cover? off the top of my head, you can get some nice jbls for 500 quid which i know is abit off budget...

 

[Stupinder]

what frequency do you need to cover? off the top of my head, you can get some nice jbls for 500 quid which i know is abit off budget...[/quote800hz to 10khz ish

 

[Stupinder]

dp

 

[i_should_coco]

JBL 2420 would be an obvious choice. Or look out for some Coral M-100s like bigdur's. LE-85s are nice: http://cgi.ebay.co.uk/Vintage-JBL-LE85-LE-85-Olympus-Horn-Speaker-8-Driver-/270685039325

Or perhaps Altecs, like the 800 series: http://cgi.ebay.co.uk/Altec-802-8D-Horn-Driver-Pair-Serial-3460-3426-8-Ohm-/300507452417

Nice pair of 2461s: http://cgi.ebay.co.uk/JBL-2461-HORN-DRIVERS-MINT-SHAPE-USED-HOME-ONLY-/230569639531?

 

[Stupinder]

Thanks guys. That reassures me a bit as it was lloking like i'd only get halfway through the project before running out of dosh.

* :^ :^ :^ :^

 

[jonjin]

the phenolic/alnico driver looks good though you'd need to have a series resistor (like in LeCleach triode festival) to boost the dip in 1kHz, and smoothen the rising frequency response...

i remember going to the lansing heritage and jblpro website to pour over all the schematics/specifications when i started this process...

 

[Stupinder]

As I say i'm just in the planning stages at the moment and waiting for a few bits and bobs to sell before i start buying anything. I reckon it's gonna be a long slow process and i'm sure you people with much more knowledge and experience in these matters will get thoroughly sick of my questions in time.

 

[jonjin]

np... the only thing stopping me upgrading is being able to help out with others go through the process

 

[Stupinder]

:^

 

[TSD15]

If you can get these for the start price it's a fair bit of kit for the money and you can sell what you don't need.

The crossovers in Martin speakers are usually very good.

Distance may be a problem unless you are visiting UK.

http://cgi.ebay.co.uk/Martin-Audio-RS1200-speaker-Pair-Fully-Horn-Loaded-/160525163388?pt=UK_ConElec_SpeakersPASystems_RL&hash=item25600b9b7c#ht_542wt_1141

 

[Stupinder]

Indeed but i'd need to hire a bloody lorry

If you can get these for the start price it's a fair bit of kit for the money and you can sell what you don't need.The crossovers in Martin speakers are usually very good.

Distance may be a problem unless you are visiting UK.

http://cgi.ebay.co.uk/Martin-Audio-RS1200-speaker-Pair-Fully-Horn-Loaded-/160525163388?pt=UK_ConElec_SpeakersPASystems_RL&hash=item25600b9b7c#ht_542wt_1141

 

[enjoy_the_music]

Some good rec's there. Those Martin's look a bargain...

 

[vinylnvalves]

Has anybody tried LOMO drivers ??

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260716475178&ssPageName=STRK:MEWAX:IT

http://cgi.ebay.com/Lomo-1a22-vintage-drivers-modified-ideal-pair-high-freq-/320636698967?pt=Vintage_Electronics_R2&hash=item4aa76fc157

The weight of these things makes shipping expensive. I have still got to arrange a work visit to the USA to pick up some 45Ib (each) Altec drivers 45Ib (each) - which would cost more to ship than buy.

 

[i_should_coco]

I think the diaphragms are pretty shit. I would avoid. The ones I've seen look like they're made of tupperware off-cuts.

 

[Stupinder]

Right, numpty question alert. Well several akcherly

1. If I went for a pair of 280hz horns (rather than 400hz xed at 800hz) crossed over at 500hz how far into the high freqs could i take them with JBL 2482 and would it be sufficient to use just a tweeter to accomodate the high frqs?

2. Can I get a single bass cab to get me to 500hz without needing another drive/cab???? or am i being a tad optimistic?

The reason I ask is that PERHAPS (unless its completely stoopid, which i think it may be) i'd like to add another horn at a later date to cover from 1800hz ( a 605hz horn) up and so would like to keep the stuff i buy as flexible as poss to allow this. Feel free to make mock, point and laugh etc... :^

Stu

 

[paulf-2007]

Spec says nominal efficiency 25% 500Hz - 2.5Khz, Frequency range 300Hz - 6Khz. 500Hz - 2.5Khz gives you 2.5 octaves so you will need something above that really. Don't listen to me though I don't know as much as the learned ones.

 

[i_should_coco]

Right, numpty question alert. Well several akcherly1. If I went for a pair of 280hz horns (rather than 400hz xed at 800hz) crossed over at 500hz how far into the high freqs could i take them with JBL 2482 and would it be sufficient to use just a tweeter to accomodate the high frqs?

2. Can I get a single bass cab to get me to 500hz without needing another drive/cab???? or am i being a tad optimistic?

The reason I ask is that PERHAPS (unless its completely stoopid, which i think it may be) i'd like to add another horn at a later date to cover from 1800hz ( a 605hz horn) up and so would like to keep the stuff i buy as flexible as poss to allow this. Feel free to make mock, point and laugh etc... :^

Stu

The 2482 will be good for 6kHz give or take, so you'll definitely need something above that. You *should* be able to get some sort of bass cab to go up to 500Hz. A nice OB could be good here.

 

[Stupinder]

Thanks chaps