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Re: K 400b-4 [message #20813 is a reply to message #20812]

Sat, 28 June 2014 09:07

pleat
Messages: 1454
Registered: June 2004
Location: Belding, Mi

Senior Member

You mentioned you have two empty 3x15 speaker cabinets, one K400B-4 amp and I think you mentioned you have a K200B-5 PA head. I'm not sure exactly what is to be accomplished. We need to backtrack and understand how your amps and speaker cabinets were intended to be used for when sold new.

The K200 PA head was offered with three speaker cabinet options. A pair of 4x10 columns, a pair of 4x12" columns, both size columns are 8 ohms each to present a 4 ohm load to the K200 amp. The third option are the siren horn 3x15 speaker cabinets. With the siren horn cabs, each cabinet is 5.3 ohms which would be just under 3 ohms to the amp. (Long story but horns with simple passive crossover present a different mix of impedence so going under the 4 ohms isn't an issue)

Look through all the catalogs on this site in the literature section and you will see a pattern of how many cabinet speaker configurations were offered with either the K200 or K400 heads.

All K200B series and K400B series amps share a one common power amp section. 100 watts RMS into a 4 ohm total load.

Starting with the K200B series, one thing will become evedent, The K200 GUITAR and BASS amps were sold with either one or two of the 2x15 speaker cabinet (each cabinet uses 16 ohm speakers for a cabinet impedence of 8 ohms). The 3x15 cabinet regardless of brand of speaker sold with just one cabient. The exception would be the PA system with two 3x15 siren horn cabs.

The K400 series keeping in mind the amp has two of the common power amps that is used in the K200 series amps. The GUITAR and BASS amps were sold with four 2x15 speaker cabinets or two 3x15 speaker cabinets. In the four 2x15 speaker cabinets, each amp would drive two cabinets.

The K400 series the amps was offered with just two 3x15" speaker cabinets regardless of brand of speaker.

The exeption again is the K400-5 PA amp, the catalog shows four of the 3x15" siren horn cabinets.

Having a game plan as to what you want to do with your cabinets and amp heads would allow us to help you.

Loading the empty 3x15 cabinet for PA use, siren horn in the top and I wouldn't mix woofers as to have a bottom woofer and another 15" to act as midrange. Pick a speaker that you think will give the best results in your price range and load both cabinet with matching woofers.

The woofers will want to be 16 ohms each so with a siren horn, each cabinet is 5.3 ohms. This will allow you to use both speaker cabinets with either the K200 amp or the K400 amp.

A couple of tricks you can do with the cabinets, you can make a bracket to mount a simple on/off switch that can reached through one of the port tubes, or mount a level control on the bracket to control the horn level.

Using the cabinets for bass guitar, you could simply turn off the horn.

My band uses two of siren 3x15 cabinets for PA (simple two way system, and we add a single 18" sub cabinet with electronic crossover to make it a three way system.

Hope this helps,
pleat

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[Message index]

		K 400b-4 By: Iowa Boy on Fri, 27 June 2014 02:40
		Re: K 400b-4 By: stevem on Fri, 27 June 2014 06:53
		Re: K 400b-4 By: pleat on Fri, 27 June 2014 07:07
		Re: K 400b-4 By: Iowa Boy on Fri, 27 June 2014 11:32
		Re: K 400b-4 By: pleat on Fri, 27 June 2014 21:45
		Re: K 400b-4 By: Iowa Boy on Sat, 28 June 2014 00:53
		Re: K 400b-4 By: stevem on Fri, 27 June 2014 11:44
		Re: K 400b-4 By: Iowa Boy on Sat, 28 June 2014 01:24
		Re: K 400b-4 By: stevem on Sat, 28 June 2014 06:37
		Re: K 400b-4 By: pleat on Sat, 28 June 2014 09:07
		Re: K 400b-4 By: pleat on Sat, 28 June 2014 09:24
		Re: K 400b-4 By: rodak on Sat, 28 June 2014 19:34
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 02:32
		Re: K 400b-4 By: pleat on Sun, 29 June 2014 07:33
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 02:36
		Re: K 400b-4 By: rodak on Sun, 29 June 2014 14:57
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 16:08
		Re: K 400b-4 By: rodak on Sun, 29 June 2014 16:49
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 18:13
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 18:21
		Re: K 400b-4 By: rodak on Sun, 29 June 2014 19:32
		Re: K 400b-4 By: pleat on Sun, 29 June 2014 19:43
		Re: K 400b-4 By: rodak on Sun, 29 June 2014 19:58
		Re: K 400b-4 By: pleat on Sun, 29 June 2014 20:07
		Re: K 400b-4 By: Iowa Boy on Sun, 29 June 2014 22:33
		Re: K 400b-4 By: pleat on Sun, 29 June 2014 22:57
		Re: K 400b-4 By: Iowa Boy on Mon, 30 June 2014 00:44
		Re: K 400b-4 By: pleat on Mon, 30 June 2014 06:27
		Re: K 400b-4 By: rodak on Mon, 30 June 2014 10:54
		Re: K 400b-4 By: pleat on Mon, 30 June 2014 16:47
		Re: K 400b-4 By: Iowa Boy on Mon, 30 June 2014 11:57

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