PD1850 vs PD1851 - Diffs/Advantages/Disadvantages

levyte357- wrote: godge wrote: I'm still yet to give our 51's some full fat 32a goodness, would love to hear them how they should Even venue with decent ring main will do the job. Couple of weeks ago, I was drawing upto 28A peaks, off ring main, powering 8x scoops, thru 2x 13A plugs, with voltage drop to only 236V.

I'm yet to draw that much power from mine, running four off an infinite8 but have only seen about 5a draw showing up on the display at peak, looks like I might have to push them a bit harder I think

levyte357- wrote: Elliot Thompson wrote: I have all the TS Parameters of the drivers you've listed in your spreadsheet. The characteristics of the 1850 & 1851 differs greatly. You will need to start scaling the drivers in a loudspeaker program to view the graphical difference in various cabinet designs. Best Regards, The point I was making is, The PD1851, PD186, V18-1200, Fane 18XB, all have warm musical tone. The PD1850/V18-1000 have aggressive in your face "gruff", that need "some" param eq to warm them up.

If the limitation were based on the cabinet size then yes, the drivers you mentioned that sound “warm” would sound similar. However, once you do not limit the cabinet size, there will be a difference amongst the drivers you mentioned on how they sound.

Usually 18-inch drivers that offer high sensitivities mean they offer more mid/kick-bass than lower sensitivity 18-inch drivers. That may be a good or bad thing pending on what you are looking to achieve.

Best Regards,

levyte357- wrote: Elliot Thompson wrote: Usually 18-inch drivers that offer high sensitivities mean they offer more mid/kick-bass than lower sensitivity 18-inch drivers. That may be a good or bad thing pending on what you are looking to achieve. Best Regards, The V18-1000/1850 loaded in, compatible horn loaded cabs, will do the lowest sub notes, but with a peaky response, until at  least 4x cabs in one stack.. Warmer, less sensitive, lower BL drivers, have flatter response, but lower SPL at lowest notes.

If you used the PD 186 it would go even lower than the PD 1850/V18-1000 in a horn. This is due the PD 186 was designed to go lower based on its TS Parameters.

A Peaky response is usually due to the limitation of the cabinet size. It is common with large woofers housed in small horns, reflex, and/or sealed enclosures. This is why some resort to smaller drivers where the loudspeaker chassis does not take up 50% of the cabinet it resides in.

A woofer in a cabinet that delivers a flat response tells you the driver is in a optimum chamber and, will not need to do a lot of work (due to excessive equalisation) to achieve the a lot of SPL. A good example is a high frequency compression driver on a large exponential horn.

Best Regards,

luton_soundman wrote: seems like out of the 50' and the 51' one isnt superior over the other, both just very different. so maybe both should be priced the same?

Probably are, to those in upper echelons, who are important enough.

@ mss pd1850 all the way, the 51 will sound pants in it

Edited by paulus - 14 August 2012 at 4:34pm

MSS wrote: luton_soundman wrote: seems like out of the 50' and the 51' one isnt superior over the other, both just very different. so maybe both should be priced the same? It should be, but it seems like they are very close in price. Not sure what I should load my RX18 with

only close in price cos the 50' went up in price  same with aload of other drivers