Schroeder "Superior Sound" Cabinets

The Schroeder Preamp is here!

Schroeder Four Band Rack-Mount Bass Preamp

* Due to overwhelming demand the lead time is 60-75 days *

Model Number: KEEN 4B-1

Description:

The KEEN 4B-1 is a versatile four-band active EQ system designed for professional live performance and recording. The Bass, Low Mid, High Mid, and Treble controls allow for +/-16 dB boost and cut for each band. Rack features include Jensen transformer coupled direct out circuit with pre and post EQ switch. Volume pot pulls out for additional 4 dB gain for passive instruments needing that extra kick. Initial gain stage is through a separate FET op-amp circuit providing very active dynamics and touch. At the center detent positions the preamp provides a flat frequency response from 20 to 18kHhz.

Each unit is built with the highest quality components available and. Each EQ is tested prior to shipping to assure it meets or exceeds all design specifications.

KEEN 4B-1 Features:

KEEN Electronics FET Four-Band Audio Bass Preamp
Four bands of tone adjustment at 40 Hz, 560 Hz, 1.12 kHz and 5.75 kHz
Push/pull Volume control for Passive/Active basses (pull for Passive +4db boost)
Jensen transformer coupled direct out circuit with pre and post EQ switch
Ground lift switch for Direct Out
Anodized CNC’d Aluminum front cover with rugged steel Chassis
Designed, hand built, and assembled in the USA to ANSI J Spec 001B

KEEN 4B-1 EQ Specifications:

Frequency Response – 15Hz to 17 kHz Bandwidth +/- 1dB with tone controls set to center detent

Treble Control - +/-17dB @ 5.75 kHz crossover frequency

Low-Mid Control - +/-16dB @ 560Hz
Bandwidth 230-960 Hz

High-Mid Control - +/-16dB @ 1,120 Hz
Bandwidth 740-1650 Hz

Bass Control - +/-18dB @ 40 Hz crossover frequency

Power Supply:
18-24 Volt DC from AC adapter

Preamp Reviews:

"The pre is phenomenal. I am really happy with this one. Really brings
out the instrument for what it is. Like it MUCH better than the BBE's
and Sansamps I've had in the past. Even better than the Kern I was
fooling around with last year. Nice eq points!

God, the more I play this, the more I am loving it. I can not wait to
get this rig out live. You really got it right with this one. Seems to
be built like a tank. Everything feels solid. The thing that sets this
pre apart from others are the controls. Now when I turn a knob, it
actually sounds like I am making adjustments - and the adjustments I
want. Very sensitive, and I mean that in a good way. On some other
pres, it feels like the tone controls do nothing. This rig with my
Sterling sounds like an absolute dream.

That push pull knob is one of the things I really like. I thought it
was going to just be a basic active/passive switch. Nice surprise!
Simplicity with tons of tonal enhancements. I don't know how you did it
with this pre."

© Schroeder Superior Sound Cabinets. All rights reserved.
Schroeder, Superior Sound, and all product names contained within are trademarks of Schroeder Cabinet Corporation.
All listings supersede all previous catalogs and sales literature.
All prices and specifications are subject to change without prior notice.

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