pleat Messages: 1452 Registered: June 2004 Location: Belding, Mi
Senior Member
The early K200A series amps came with just port holes behind the grill cloth or at a 20.00 option the aluminum ports with the three screws. Kustom didn't keep the optional port tubes very long before it became standard with the cabinet. You will notice the Kustom logo will have Kustom By Ross on the cabs with aluminum ports, but I have seen aluminum port cabs with the original logo as Kustom Electronics. I'd guess those cabs were towards the end of run before the Chrome plastic ports and Kustom Electronics logo became standard issue.
woodsey Messages: 24 Registered: October 2011 Location: Earth
Junior Member
Thanks again! I restored a ragged 1969 kustom 2-15 (CTS) cab. I bought it from a local musician. It was a shell...filthy, no plates or rollers, missing a handle and the remaining one bent from being dragged, there were no ports and the speakers were only frames, no cones at all! It became a labor of love and a great project. I now have her fully restored and beautiful! I used the plastic chrome ports. I bought a K-250 head to go with her.. And now I have another old cab, a charcoal 2-15 Ross (excellent condition) (unloaded) with the full cloth face..no ports. I recently bought a K200-5 to go with it....Any suggestions on what drivers to use would be appreciated.
pleat Messages: 1452 Registered: June 2004 Location: Belding, Mi
Senior Member
I didn't notice in the posts if you are playing bass, guitar, or keyboards. Regardless of instrument, your K250 head wants to drive one 4 ohm load cabinet for the 125 watt RMS output. (one speaker jack out)
Your K200-5 amp head can drive two 8 ohm speaker cabinets (two Speaker Jack outs) for a 4 ohm total load cabinet for 100 watt RMS output.
If you plan just using one 2x15 speaker cabinet to each amp head, then you can order 8 ohm speakers. Wire the speakers in parallel, and each cabinet will give you 4 ohms per cabinet.
Doing this, you limit one speaker cabinet per amp head, but you get max output from each amp head.
if you bought 16 ohms speakers for both speaker cabinets and each speaker is wired in parallel, each cabinet is 8 ohm load cabinet. This gives you options to use both cabinets on the K200 amp for the 100 watts. The K250 head will suffer a little less in power output running just one 8 ohm cabinet, but if you add a second speaker jack to the K250 head, you can safely run the two 8 ohm cabinets for the max 125 watts.
pleat
woodsey Messages: 24 Registered: October 2011 Location: Earth
Junior Member
Greetings! Actually I play bass and plan to "re-load" the (Black)bass cab. Right now she's packin' 2x15 400w (each) drivers. which I feel may be too much over-kill for the K250-1 head. So I wish to get a better fit to that head.
In the "unloaded" (Charcoal) 2x15 Cab, I will use my 200 PA head with it, for guitar, mics, whatever. All suggestions welcomed.
My Budget depends on choice of drivers, as I plan to keep these two cabs. BTW, in regards to bass I prefer the deep bottom.
Thanks, woodsey
stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
Do a search on this site for this question as I have covered it many many times!
Also note that with Kustoms it's not a matter of 400 watt drivers not being a good match , what matters is that the driver have have a good SPL rating ( above 98 db ) so that it is loud with little wattage bring apply and then another big thing being what the speakers spec for how big a cabinet it needs is very important, this is the drivers VAS spec when viewing it's data.
Using a driver(s) that needs more internal cabinet volume ( cubic feet ) will not allow the drive to reproduce notes well below 200 HZ in most cases without 6 times more wattage than a K200 has to pump out!
woodsey Messages: 24 Registered: October 2011 Location: Earth
Junior Member
So, In regards to the (charcoal) 2x15 cab (by ross) Full Cloth front, no external ports. Can you give me a date range? I'm assuming prior to 1969?
Thanks Woodsey