6 HD15s.. to get 8 ohms at the amp??

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   Hi all,
Right...

Decided on 12 HDs not 8... have also decided to go with the proline 3000 amps.. 2 of, one to run each side...

The proline 3000 puts out 3000 watts @ 8 ohms bridged... (it also does 1800 watts at 2 ohm per channel according to the manual, so it might do 3600 @ 4 ohm bridged, but I don't really fancy running like this, and it's not in the manual).

SO... how the hell do I wire 6 HDs to present an 8 Ohm load?

Cheers,

Adam.

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adambomb Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220	Post Options Post Reply Quote adambomb Report Post Thanks(0) Quote Reply Topic: 6 HD15s.. to get 8 ohms at the amp?? Posted: 20 September 2006 at 10:03am
	Hi all, Right... Decided on 12 HDs not 8... have also decided to go with the proline 3000 amps.. 2 of, one to run each side... The proline 3000 puts out 3000 watts @ 8 ohms bridged... (it also does 1800 watts at 2 ohm per channel according to the manual, so it might do 3600 @ 4 ohm bridged, but I don't really fancy running like this, and it's not in the manual). SO... how the hell do I wire 6 HDs to present an 8 Ohm load? Cheers, Adam.

S�ren Dyhr Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 October 2004 Status: Offline Points: 4	Post Options Post Reply Quote S�ren Dyhr Report Post Thanks(0) Quote Reply Posted: 20 September 2006 at 12:07pm
	3x8�in parrallel gives 2,666666 which is documented apparently to be legal for a single channel... --sd

djstefanos Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 18 November 2005 Status: Offline Points: 2355	Post Options Post Reply Quote djstefanos Report Post Thanks(0) Quote Reply Posted: 20 September 2006 at 12:32pm
	more amps

adambomb Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220	Post Options Post Reply Quote adambomb Report Post Thanks(0) Quote Reply Posted: 20 September 2006 at 1:13pm
	NO MORE AMPS... 3 3K amps has to be enough! (1 for the 4 X1s and 2 for the 12 HDs)... they put out the required power, its just a case of working out the best way to wire em up! Anyone got any sensible suggestions? At the moment I'm thinking 3 on each channel wired parrallel, which should give me 2.66 ohms (I think??), each driver should get around 600watts like this and be safe for the amp (as its rated at 2ohms).

ceharden Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776	Post Options Post Reply Quote ceharden Report Post Thanks(0) Quote Reply Posted: 20 September 2006 at 3:50pm
	Yup, 3 drivers per channel is the way to go. If you build them as HD215's, wire one driver to pins 1+/- and one to pins 2+/-. Then link all three together with 4 core cable and assuming the amp outputs both channels on one speakon you're done. V.v.easy!

adambomb Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220	Post Options Post Reply Quote adambomb Report Post Thanks(0) Quote Reply Posted: 20 September 2006 at 7:06pm
	Bollocks... Have already started going down the single HD15 route... might have a chance to change to HD215s tho... will find out tomorrow. If it's too late... What do I do? Wire half on 1+/- and half on 2+/-??? Cheers for the help,

ceharden Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776	Post Options Post Reply Quote ceharden Report Post Thanks(0) Quote Reply Posted: 21 September 2006 at 3:39am
	It's not a major problem if you have singles, but for that many cabs, twins will probably be easier. What you can do in the case of singles is to link the first three, then use a pin swap cable (reverses pins 1 and 2) onto the fourth then link the rest as normal. It's just clever ways to link all the cabs on one feeder cable. Just make sure you link through all of the pins on the speakons when you make the panels up to make this possible.

adambomb Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220	Post Options Post Reply Quote adambomb Report Post Thanks(0) Quote Reply Posted: 21 September 2006 at 6:42am
	I have found that my wood working guy has not cut any wood yet.. so have changed to 6 HD215s... sweet! Cheers for your help! Most appriciated! Adam.

norty303 Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8806	Post Options Post Reply Quote norty303 Report Post Thanks(0) Quote Reply Posted: 21 September 2006 at 12:35pm
	We have run 12 HD's off 2 PLX3402's, 3 a side at 2.67R. getting about 500w per cab. Sound great and certainly no discernable difference between when we run them with 750 per cab
	My laser stuff: Frikkin Lasers

adambomb Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 10 April 2006 Location: United Kingdom Status: Offline Points: 3220	Post Options Post Reply Quote adambomb Report Post Thanks(0) Quote Reply Posted: 21 September 2006 at 12:43pm
	Cool! I was sure I had enough power... It's a toss up between Celestion FTR and P.Audio C15 500 at the moment.. I can get the Celestions for �65 each (they retail at �110)... or PAP do the P.Audios at �77 (if I buy 12 in one go)... no I can't afford the PD154s... I have had a go at modelling the FTRs with hornresp... and to me the curve looks good, maybe even slightly higher output than the PD154s!(but its a bit of a lumpy curve)... However I have no idea if I'm using Hornresp right.. I have only filled in the blanks from the screen grabs I got from here (I have posted the TS for the FTRs but nobody seams interested in helping me plot them). Edited by adambomb - 21 September 2006 at 12:44pm