Looking for some more info on Altec 816A's |
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AlfieDring
Young Croc Joined: 04 September 2006 Location: Bath, UK Status: Offline Points: 842 |
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Posted: 13 December 2007 at 2:58pm |
Im trying to find out if these are gonna be suitable for my needs.
Ive got hold of the plan and spec sheet from http://www.altecpro.com/products/vintage/index.htm The intended use would be as the middle cab in a 3 way active setup, with scoop(s) beneath and a compression driver on a large horn above. System design goal is maximum electrical into acoustic conversion (efficiency of speakers, but also considering idle amp power as a reason not to go 4 way) to provide for live music outdoors to 200 people. Quoted freq response is 50-1000Hz so this might be a tad on the low side for the comp driver? Does anyone use them or have experience with em? If so what do you use on top? What x over points can you reccomend and what drivers do you load them with? Ta :) Alf |
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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Yep,used to have a pair of the genuine Altec 816`s.with the 421-8h drivers(a slightly odd size at 16inches,due to a large frame!)...nice kick from around 100 up to around 800hz...very efficient...used a 2" driver above,crossed at 1k,no probs....i even used them as small bass cab from 60hz,to make a compact 2-way system...worked fine in a small hall...good throw as well....very loud for only 150w per channel...good"disco" sound! Edit....these also used to work well with the JBL"K" series driver,and the old Celestion powercell 250.....not sure about a modern driver..JBL E130 would be ideal,but its not around now. Edited by jbl_man - 13 December 2007 at 3:18pm |
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Be seeing you.
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AlfieDring
Young Croc Joined: 04 September 2006 Location: Bath, UK Status: Offline Points: 842 |
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Cheers for the quick response JBL man :P And almost all good news too!
Im trying to compile a target spec now for the driver. Ive got the data for the JBL E130 that you suggested but cant find anything on that celestion one. Looking over the drivers TS parameters (JBL E130, 421-8h and the altec 421-8LF) it looks like i need to find something roughly like...... Vas <300 Qts in range 0.19 – 0.25 Ill keep nosing around to see what i can find. Im also looking for any internal photo's as im having trouble figuring out the bracing! Cheers Alf |
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boab
Registered User Joined: 21 June 2004 Location: Busby Status: Offline Points: 484 |
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I have two working celestion powercell 15s in good condition.
Will be happy to sell them as they are not doing much just now. Cheers Boab Edit: Just remembered I have one of those(copy) and 4 of the 12" versions. £150 the lot inc 2 x powercells. Edited by boab - 13 December 2007 at 9:06pm |
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AlfieDring
Young Croc Joined: 04 September 2006 Location: Bath, UK Status: Offline Points: 842 |
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Thanks for the offer boab, sounds like a pretty good deal. Ive no need of the 12's! Can i see some pic's of the 816A copy you've got? Particularly the insides if you'd be so kind :P
Also have you any info on the celestion's? Watt's yr of manufacture ect? Theres diddly squat on the net... Cheers Alf |
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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djk
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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Alfie,the 515b was Altec`s top-of the range cinema bass driver,also used in the A7 vott cabinet...i would forget about that,as they are quite low power,and almost impossible to find now.
The 816s i had were from the Altec factory,and had 421-8h drivers as standard.that being basically a 150w extended-range guitar speaker,but they worked very well...as DJK says,the front horn loads it from about 150hz,below that it just works as reflex box.
Here is photo of mine from 1978!
Ian.
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Be seeing you.
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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JBL E140 works quite well in these, will handle the power too.
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djk
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godathunder
Old Croc Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1833 |
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LOUDER THAN LOUD
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mykey
Old Croc Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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is that your system then Ger?
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godathunder
Old Croc Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1833 |
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2 of these at the front mykey - ancient but reliable jbl - parts of the old electrotec labq system- once in a while I even orientate the mids and his correctly. theres also some 15+1s, 12+1s and 8+1s depending on what Im using it for.
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LOUDER THAN LOUD
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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Great balencing act there Ger!..oh i love old skool stuff...are those pukka Court acoustics 18" horns at the bottom?
Ian.
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Be seeing you.
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