INTERCHANGEABLE
Replace your COPPERSTONE preamp without soldering for another one with different sound characteristics.
GAIN CONTROL
Get always the powerfull sound you need. Up to +9dB gain boost
3 SELECTABLE FREQUENCIES
Up to 3 different mid tone frequencies to play with
ENERGY EFFICIENT
COPPERSTONE will run on one 9v battery longer than most of other preamps
COMPACT DESIGN
COPPERSTONE reduced dimensions makes it among smallest preamps available today
CONFIGURABLE
Order your custom COPPERSTONE that better match your desired tone
FOR ACTIVE & PASSIVE PICKUPS
COPPERSTONE bass guitar preamp is compatible with majority of active and passive pickups available on the market
EASY INSTALLATION
Install your COPPERSTONE in few easy steps
EXPANDABLE
COPPERSTONE works flawlessly with other JERZY DROZD modules like FLAME, QUARTZB and MORPHB
JERZY DROZD Copperstone
State of the Art
interchangeable 3 Band Bass Guitar Preamp
Free your Tone
COPPERSTONE interchangeable 3 Band Bass Guitar Preamp frees your instrument from being attached just to one tone. Now if your tone needs to change, for the need, experiment, or just for fun - you can replace your COPPERSTONE at will.
Beautifully crafted, smartly engineered
COPPERSTONE is beautifully crafted compact replaceable 3 band bass guitar preamp designed by Jerzy Drozd and manufactured in THE CASTLE. This is the same bass guitar preamp installed in all JERZY DROZD creations equiped with active electronics.
COPPERSTONE smartly engineered into a small footprint, is easy to install into the bass guitar of your choice. Besides its unique characteristic, interchangeability, this 3 band bass guitar preamp delivers up to 9dB gain boost and can be configured with up to 3 different mid range selectable frequencies, passive tone and active/passive mode among others.
COPPERSTONE produce a powerful tone with warm lows, its 3 midrange selectable frequencies put at your disposal different usable medium tone variations, while the treble control serves a crisp and clear sound.
Up to 3 different switchable medium frequencies
COPPERSTONE can be configured with 3 different mid frequency variations:
- single fixed frequency eg.: 350Hz
- two switchable frequencies eg.: 350Hz/700Hz using 2 way toggle switch
- tree switchable frequencies eg.: 350Hz/700Hz/900Hz using 3 way toggle switch
More over, besides standard frequencies available for COPPERSTONE, you can configure your custom COPPERSTONE preamp with different frequencies to suits your needs.
Adjustable Gain
In its basic setup, COPPERSTONE is adjusted as a unity gain device, where the input signal remains
the same as the output signal. This means that active and passive signals will remain the same
when EQ is set flat on all the tree bands. However, it is possible to boost the gain of COPPERSTONE
up to +9dB if necessary, specially if pickups signal is not enough to drive the first stage of amplification.
Small
COPPERSTONE is one of the smallest bass guitar preamps available today.
FLAME
Flame, an optional module for COPPERRSTONE is a discrete electronic device. This subminiature module
monitors your battery status and will flash when battery drops its voltage below the desired level.
Flame is installed as standard on all new JERZY DROZD creations except PRELUDE instruments.
Energy Efficient & Environmentally Friendly
COPPERSTONE operates on current as low as 0,84mA which represent mostly half of current consumed by other commercialy available bass guitar preamps. The minimum voltage necessary to power COPPERSTONE is 3.5V, very low compared to the minimum of 5v or even 7v for other similar devices.
While batttery with a voltage of 5V will be considered "dead" for other preamps, COPPERSTONE will still be capable to squeeze it down to just 3.5 volts with impresive 70% performance.
These factors among others make this unique bass preamp to stand out in terms of energy efficiency, which translates in less battery consumption, less vaste and, lastly in a lower operational cost.
Optional Expansion Modules
Expansion modules allow you to extend basic funcionality of COPPERSTONE. Can be purchased separately or as Full COPERSTONNE set.
- FLAME (battery level monitor module)
- QUARZ (multi channel piezo preamp for accoustic tone)
- MORPH-B (MIDI module)
COPPERSTONE Specifications
Controls
Optional Controls
- Master Volume
- Pickups Blend
- Treble
- Mid
- Bass
- Active / Passive Toggle Switch (optional)
- Mid Freq. 2 or 3 way Toggle Switch (optional)
- Passive Tone (optional)
Technical Details
Dimensions & Weight
Frequency response (for 500mV input signal):
- Bass: +/- 16.8dB @ 50Hz
- Midrange: +/- 16.8 dB @ 380Hz, 770Hz Up to 3 selectable frequencies
- Treble: +/- 16dB @ 6.0 KHz
- Gain adjustment: 0dB to +9dB
- Frequency range: 18 Hz - 20 KHz
- Input Impedance: 500kOhm
- Output Impedance: 100 Ohm
- Power consumption: 840uA
- Operating voltage: 18v down to 3.5V, one or two 9v alcaline batteries
- Single 9v battery life: Estimated at 600 hours
- Long: 28mm
- Wide: 18mm
- High: 8.3mm
- Weight: 9.7g
- Cover plate: Phosphor bronze
- Connection: 24 pins
Optional Expansion Modules
FLAME
Flame is a discrete electronic device. This little module monitor your battery status and will flash when battery drops its voltage below desired level.
QUARZB
Multi-channel Piezo preamp.
MORPHB
MIDI module.
All specifications are subject to change without previous notice.
JERZY DROZD puts at your disposal the finest guitar electronics
Should you desire to acquire a JERZY DROZD Copperstone
JERZY DROZD COPPERSTONE is Bespoke
Like every JERZY DROZD creation, COPPERSTONE bass guitar preamp are conceived to be bespoke; each detail, even the most subtle, can be personalised to embody the perfect companion for the visionary seeking new horizons and a virgin soil where life can be an art, again.