Shift Line TWIN MkIIIS - Fender Twin Reverb guitar preamp IR cabinet simulator and Tungsol tubes

Mint conditions, used only a couple of time in my home-studio. A Fender Twin Reverb style tube preamp with built-in IR cabinet simulation. Comes with original box and power supply. No velcro on bottom, no scratches. Equipped with one made in Russia 12AX7/ECC83 Tungsol preamp tube.
PLEASE, SEND ME A MESSAGE BEFORE YOU BUY, TO GIVE YOU AN ACCURATE SHIPPING COST QUOTE.
THANK YOU

SHIFT LINE TWIN MKIIIS

The Shift Line Twin MkIIIS is the third revision of our tube guitar preamplifier which boasts a characterful sound, universal connectivity, and a compact enclosure.

The dynamic range has been expanded to achieve more maximum gain. As a result, it can go from its renowned clean sound into crunch and overdrive without external boosting. The cabinet simulation is based on the Impulse Response Convolution technology, which provides a realistic and detailed sound while preserving the character of the power amp, cabinet and microphone used to record the impulse. The device comes with two impulses recorded from the Fender Twin combo amplifier. The microSD card slot allows users to upload their own cabinet impulses.
Connections:

IN is the signal source input.

THRU is a buffered output for the unprocessed signal split from the IN jack.

SEND/RETURN is a series effects loop for external processing. The SEND out can also be used as an additional output.

OUT is the main output designed to connect the preamplifier to a power amplifier (RETURN or POWER AMP IN on combo amplifiers, INPUT on power amplifiers).

AUX IN is an external audio input (the signal from the AUX IN is only heard through the PHONES output).

PHONES is a headphones output.

BALANCED OUT is a balanced output.

POWER IN is a power supply input. The power requirements are 12V DC 650mA.

MicroSD is a microSD card slot.

  Controls:

GAIN controls input signal amplification. It can go from a crystal-clear sound all the way to a classic California-style overdrive.

The BASS, MIDDLE and TREBLE knobs constitute a classic 3-band passive EQ with a mild frequency correction effect.

MASTER controls the volume of the signal coming from the OUT jack.

VOLUME controls the volume of the signal coming from the PHONES and BALANCED OUT jacks.
The MASTER and VOLUME knobs work independently.

The TOP switch controls the signal's high frequency harmonic content. The "+" position accentuates the highs and the attack. The "-" position provides a milder sound by cutting the high frequencies. The neutral position does not affect the signal in any way.

The GNDswitch allows to override "ground loops" that can negatively affect the signal when using XLR connections. In the lower position of the switch, the preamp's "ground" is connected to the signal receiver's "ground". In the middle position, the "grounds" are disconnected. In the upper position, the "grounds" are connected and an additional filter is used to remove interference.
The optimal setting of the GND switch is selected by ear: there should be a minimum amount of 50Hz hum and interference.

The CAB switch selects one of the two built-in cabinet impulses recorded from a Fender Twin combo amplifier with two JBL D120F speakers:
• The "A" position selects the impulse recorded by a LOMO 19A19 microphone placed 15cm away from the edge of the speaker's protective cap.
• In the middle position, cabinet simulation is disengaged.
• The "B" position selects the impulse recorded by a Sennheiser e609 microphone placed 25cm away from the center of the speaker.
When using a microSD card, impulses are loaded from the corresponding folder on the card. The CAB switch affects the signal from the BALANCED OUT and the PHONES OUT but does not affect the signal from the main OUT.

Specifications:

Tube type: 12AX7

Memory card type: microSD

IR latency: 1,2ms

IN: 6,3mm, mono, unbalanced, -20dB, 1MOhm input impedance

THRU: 6,3mm, mono, unbalanced, -20dB, 1kOhm output impedance

SEND: 6,3mm, mono, unbalanced, -10dB, 1kOhm output impedance

RETURN: 6,3mm, mono, unbalanced, -10dB, 1MOhm input impedance

OUT: 6,3mm, mono, unbalanced, +20dB, 1kOhm output impedance

BALANCED OUT: XLR, mono, balanced, +10dB, 1kOhm output impedance

AUX: 3,5mm, stereo, unbalanced, 0dB, 10kOhm input impedance

PHONES: 3,5mm, stereo, unbalanced, +10dB, 10Ohm output impedance

POWER: 12V DC 650mA, negative tip, 2.1/5.5mm diameter. Phantom power of the balanced line (+48V) or battery power are insufficient for the preamp to operate on. If phantom power is turned on, it will not damage the device. Use a regulated PSU only.

Dimensions (LxWxH): 124x104x55mm (4.9x4.1x2.2")

Unit weight: 480g (1.06lb)

PSU weight: 120g (0.26lb)