Unit 5, Silveroaks Farm, Hawkhurst Lane, Waldron, Heathfield, E.Sussex, UK, TN21 0RS
Tel (0)1435- 813393, International +44 1435 813393
VAT Reg. No. GB 241 7291 72






Our Dual channel low noise discrete component Unity Gain Class A Line Driver has been specifically designed to overcome the problems often encountered with amplification of Electric Instruments fitted with magnetic transducers. A frequent cause of these problems is the mismatch of the impedance in the electrical circuit between the pickup and subsequent equipment: this mismatch has been completely eliminated with the introduction of our DUAL LD-3™ Line Driver. The output
impedance is low to enable the output signal to be sent over long cables with minimum loss of volume or tone.

The input impedance of channels IN A and IN B are identical to a high quality tube amplifier and our Unity Gain Class A Line Driver also features a highly effective RF filter which will help prevent interference from nearby radio transmitters. Both input channels have their own Unity Gain Class A Line Driver which means that channel selection is done at low impedance thus eliminating any “pops” or other switching transients.

The pickup outputs should be connected directly to either of the DUAL LD-3™ inputs with a low loss, screened cable; the DUAL LD-3™ OUTPUT can now be fed to any chain of effects or volume pedal etc. (if used) and then on to the amplifier, using fully screened cables throughout. Selection of the active input is via the footswitch marked IN A or IN B and the adjacent LED will indicate the active channel.

Also fitted is a TUNER output, which may be used to feed the active input signal to a separate Tuner; this signal is identical to the main OUTPUT signal but has additional isolation components to ensure that interference signals, which may be generated in a tuner, are not fed back to the amplifier. The TUNER signal is permanently active. For optimum results the external Tuner should be powered by battery or an isolated dc power supply and not the same dc power supply used to power the DUAL LD-3™.

The second heavy-duty footswitch marked PLAY/MUTE controls the signal sent to the main OUTPUT jack and provides a complete shutdown of the audio signal path when set to MUTE. Indication of status is by two further LEDs.

Each unit is hand built, wired and tested by Pete, Lynda and Mingus Cornish. Dimensions: 145 X 95 X 49 mm


This unit is capable of being used with any stabilised and noise free supply voltage between 9Vdc and 24Vdc - the gain is unity with all dc supply voltages but also see below. We recommend the use of the Voodoo Lab Pedal Power 2 Plus adaptor as meeting the above criteria If only a single unit is to be powered the BOSS PSA series may be more cost effective and is also recommended; but do not “Daisy Chain” other effects if using this adaptor as this may cause hum problems.

Using a fully smoothed and regulated AC/DC adapter with an output voltage of between 9 and 24Vdc Maximum, and capable of supplying 20mA, the signal performance of the unit will be as show below. DC connector is 2.1mm with negative (-VE) tip.

Please do not use an adapter with a higher output voltage than the specified 24Vdc maximum, or of reversed polarity, as it may damage the DUAL LD-3™. An adapter with an AC voltage output should NOT be used, as it will permanently damage the DUAL LD-3™. Damage caused by the use of the incorrect adapters mentioned above will not be covered under the terms of our warranty.

SPECIFICATION (with 9Vdc supply):
SPECIFICATION (with 24dc supply):
Input Impedance 1MΩ
Input Impedance 1MΩ
Minimum Output Load 10KΩ
Minimum Output Load 10KΩ
Maximum Output +9dBm/2.2Vrms/6.25v P/P
Maximum Output +18dBm/6.2Vrms/17.6v P/P
Output Noise -110dBm (10Khz B/W)
Output Noise -110dBm (10Khz B/W)
Frequency Response +/- 1dB 15Hz to 40KHz
Frequency Response +/- 1dB 15Hz to 40KHz


This unit has been built using the finest available components and constructed to the highest standards but should any fault occur during the two years from date of purchase please return it post paid to the above address where under guarantee repairs of any original manufacturing fault will be carried out (normal wear, misuse, unauthorized modifications or accidental damage excepted). The warranty will be voided if the guarantee labels are damaged or removed. This warranty does not apply to customer’s own equipment, which has been connected to this unit. This warranty is not transferable.

©Pete Cornish™ Partnership 2014. E. & O.E.