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Forum: Repairing Kustom Amps
 Topic: Active Bass and K250 preamp damage
Active Bass and K250 preamp damage [message #27964] Wed, 20 January 2021 07:45
stevem is currently offline  stevem
Messages: 4331
Registered: June 2004
Location: NY
Senior Member
Well over a year ago now while at rehearsal and using one of my basses with a 18 volt active preamp I damaged my selectone channel in one of my K250 heads when it started to produce a ton of hiss.

Just over the weekend I got to look into the issue and had to replace the 14 pin duel section IC chip to fix it.

So you folks with active preamps in your guitars and or using stomp boxes that can add to signal input levels in to the amp beware of driving these 250 and K150 heads with too much signal into them!

These amps where not made to need that hot a input signal level to drive them to full output wattage.

[Updated on: Wed, 20 January 2021 07:48]

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Forum: Comment Board
 Topic: Bass speakers
Bass speakers [message #27968] Sun, 24 January 2021 16:11
RobbieNuke is currently offline  RobbieNuke
Messages: 65
Registered: October 2006
Location: Baltimore
CTS, Altec, and JBL drivers were available in all the bass cabinets up through the early 70's. But were the entry level speakers used later on Eminence built/KEI badged units? Were any other brands used? I know E-V speakers were offered as an upgrade up through the 80's. Any photo's would be appreciated!

Current Time: Tue Jan #d 21:48:49 EST 2021
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