no bass...

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   Hey chaps, I thought I'd ask here as I'm sure you guys will know the answer. 

I used to have some plastic cabinet 15" full range PA speakers and although not the greatest bass response they were adequate for my needs as PA speakers and for music playback at gigs, I sold them several years ago but recently bought some other plastic cabinet speakers loaded eith delta 15A 400W drivers and a compression horn of some type. 

The weird thing is that they produce absolutely bugger all bass, would you suppose this is a driver problem or a passive crossover issue? I can't see why they would be so much less bassey than my old cabs!

Thanks guys

Tim

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jifop Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 11 July 2007 Location: United Kingdom Status: Offline Points: 49	Post Options Post Reply Quote jifop Report Post Thanks(0) Quote Reply Topic: no bass... Posted: 31 August 2014 at 8:21am
	Hey chaps, I thought I'd ask here as I'm sure you guys will know the answer. I used to have some plastic cabinet 15" full range PA speakers and although not the greatest bass response they were adequate for my needs as PA speakers and for music playback at gigs, I sold them several years ago but recently bought some other plastic cabinet speakers loaded eith delta 15A 400W drivers and a compression horn of some type. The weird thing is that they produce absolutely bugger all bass, would you suppose this is a driver problem or a passive crossover issue? I can't see why they would be so much less bassey than my old cabs! Thanks guys Tim

ShokZi Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 05 August 2011 Status: Offline Points: 235	Post Options Post Reply Quote ShokZi Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 8:58am
	it could be down to alot of things, but im pretty sure the delta 15A is a mid driver, so wouldnt produce much in the way of bass, it could also be down to box tuning...

colint Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 06 October 2007 Location: United Kingdom Status: Offline Points: 5227	Post Options Post Reply Quote colint Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 10:06am
	The 15A is a mid bass driver so should be ok for what it's being used for is it original to the cabs it's in? what you could do is to connect a lead direct to the driver (only the 15 and disconnect the passive crossover first) and try it with a full range signal in the cab to see if it makes a difference, it could be a problem with the crossover.
	Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes!

Jimmer Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 30 April 2010 Location: Stroud / Glos Status: Offline Points: 2605	Post Options Post Reply Quote Jimmer Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 10:40am
	Check polarity on the mid/bass drivers
	Light travels faster than sound....That's why some people appear bright until you hear them speak!

patryk1305 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 13 December 2012 Location: United Kingdom Status: Offline Points: 488	Post Options Post Reply Quote patryk1305 Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 11:25am
	I think you just expect too much from these drivers :)

mini-mad Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903	Post Options Post Reply Quote mini-mad Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 11:53am
	+1
	If it sounds like a gorilla is trying to escape, turn it down.

jifop Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 11 July 2007 Location: United Kingdom Status: Offline Points: 49	Post Options Post Reply Quote jifop Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 1:21pm
	Tbh I didn't expect too much as they were cheap as hell especially compared to my old ones but I thought it was worth asking here before I wasted money on new ones! Thanks for the advice, I don't believe they are the correct drivers for the cabinet but I will check the crossover and polarity and of that gets me nowhere I'll either flog them or get some small bins! Thanks Tim

jbl_man Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11155	Post Options Post Reply Quote jbl_man Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 2:07pm
	If one of the drivers is out of phase (reversed polarity) it will tend to cancel the bass out from the other,so check that first. I have even seen 2x15 cabinets with the drivers out of phase in the same cabinet,and they wondered why they didnt produce any bass.
	Be seeing you.

Djriver1 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 05 May 2014 Status: Offline Points: 25	Post Options Post Reply Quote Djriver1 Report Post Thanks(0) Quote Reply Posted: 31 August 2014 at 7:57pm
	+1 on the check polarity

jifop Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 11 July 2007 Location: United Kingdom Status: Offline Points: 49	Post Options Post Reply Quote jifop Report Post Thanks(0) Quote Reply Posted: 08 September 2014 at 9:36pm
	Thanks chaps, looks like the wiring is all over the shop, tweeters and MIDs all mixed up and different! Will rewire them this weekend once I figure out which way round they should be wired! Tim

Dub Specialist Sound Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873	Post Options Post Reply Quote Dub Specialist Sound Report Post Thanks(0) Quote Reply Posted: 08 September 2014 at 9:39pm
	Amstrad Dat!........
	Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...