EDB-1

(discontinued, replaced by EDB-2 – see below)
Type: dual channel preamp (suitable for violin/guitar or bass instruments)
Features: Mono/Stereo Jacks Inputs, XLR input, Input impedance switchable to optimise various pickup types, 3 Way “Range” Control selects High Pass Filter (Low cut settings, between Guitar, Violin or Bass), 2 Channels, 5 Band EQ, Tunable Notch Filter with variable band width + In/Out, Phantom Power to Inputs via Switch, Balanced XLR Line Out ( Mix of 2 Channels ) + Earth Lift Switch, Jack Line Out in Mono Mix of 2 Channels, Battery or External DC Plug In Power Supply, Low Battery Indicator

EDB-2

Type: dual channel preamp (suitable for violin/guitar or bass instruments)
Features: Mono/Stereo Jacks Inputs, XLR input, Input impedance switchable to optimise various pickup types, 3 Way “Range” Control selects High Pass Filter (Low cut settings, between Guitar, Violin or Bass), 2 Channels, 5 Band EQ (EQ on Ch.1, Ch.2 or on both channels), Tunable Notch Filter with variable band width + In/Out, Phantom Power on ch. 1 (Phantom to “Ring” or “Tip” at 9V) and ch. 2/XLR (18V) , Balanced XLR Line Out ( Mix of 2 Channels ) + Earth Lift Switch, Jack Line Out in Mono Mix of 2 Channels, Aux in Mini-jack input (for e.g. iPod), Battery or External DC Plug In Power Supply, Low Battery Indicator

EDM-1

Type: 1-channel preamp
Features: EQ-presets for bass, cello, guitar, violin and other instruments, 3-band EQ, 3-way impedance switching, Phantom Powering to “Ring” or “Tip” at 9v, tunable range control, p

www.headwaymusicaudio.com

available at www.kontrabass-atelier.de

Promethean P500H Head

Type: amp head, single channel
Power Rating: 500W
Features: 6-band graphic EQ/bass and treble shelving tone controls, Peak limiting circuit, Vibe (color) control knob, 2-way Clip Indicator, Auxiliary input (1/8″), Balance line out (XLR), Phones out, tuner out (1/8″)
size: 11″W x 10.4″D x 2.2″H
weight: 6.4 lbs

The Promethean head can be mounted into a combo (like pictured) or used with any high-quality bass speaker cabinet with the appropriate handling requirements.

Promethean 10″ Combo P5110

Detachable P500H head with extension cabinet
Features: 10″ subwoofer rated at 250 watts, High frequency dome tweeter with passive crossover, Tilt-up system
size: 12.8″W x 13.1″H x 14.2″D
weight: 27.6 lbs

www.ibanez.com

Sunday Driver
Type: preamp/buffer
Features: input impedance 1 MOhm/4MOhm (switchable), gain control
This little box has not much features, but is very effective: it has a switchable input impedance of 1 or 4 MOhm, which helps to get the best from your piezo pickup. The signal is preamplified without any modification. It is suggested to be used as a impedance matching buffer for electric bass amps (which usually have too low impedance inputs), as a cable driver for large stages, in complex effects set-ups, or as a recording preamp.
available at www.kontrabass-atelier.de
www.lehle.com
Basswitch
Type: preamp/buffer/DI-box/…
Features: input impedance 1 MOhm/10MOhm (switchable), semi-parametric EQ, two inputs with a/b switch, effects loops, mute switch, tuner out, DI out, booster

Podium MXV-B

Type: 4/5 channel combo amp
Power Rating: 100/150 Watt (RMS)
Drivers: 2 x 8″ , 2 x tweeter
Size: 470 x 345 x 265 mm
Weight: 13 kg
Features: Compressor-Limiter, channel #1, #2 und #3 with semi-automatic Gain, channel #1 with parametric Mid control.

www.cromacord.com

Double Combo

Type: combo or amp head
Features: 2 channels
Power rating: 220, 300, 550 watts power-modules
Features: Mic input, Phantom Power, High impedance instrument input.
Each channel with 4 band equalizer, phase switch, Lo cut, -10 db pad, 24 bit effects that pans between channels. Channel switch and mute. 3 line drivers (direct outs), head-phone output, and Neutrik combo sockets for speakon and jack. 230/115 volt mains power.

Designed and hand made (!) by bassist Jesper Lundgaard from Denmark.
(Formerly sold under the Arco Amps brand name)
www.lundgaardamps.com

Series 3

Type: preamp
Feautures: volume control, adjustable high-pass filter, Input impedance / capacitance: 10 MΩ / 220 pF, Phase (polarity reversal) switch

This preamp was developped and is manufactured as part-time business by bassist Francis Deck. He doesn’t sell to outside the US: “Unfortunately, the world still has borders. The HPF-Pre product does not carry a CE marking. There may be other countries where the lack of regulatory approval is also a problem. While I am confident that the HPF-Pre would be approved if tested, the cost of testing runs into the thousands of dollars. This is simply impossible for a very small business.”
However, Francis makes the schematics of his preamps available to public for DIY projects.

https://sites.google.com/site/hpftechllc/home/hpf-pre