dpFX Pedals - 3-Loop Parallel STEREO Blender / FX Loop switcher [v3.0], w/ EQ, phase reverse, Tails, headphones-out (OPA167x)

dpFX Pedals crafts handmade, hand-painted pedals and custom effects (dpeffects.com). All products are serial numbered.

*** This is the OPA167x variation of our Triple Loop Parallel Stereo Blender [V3.0]

OPA167x Variation Explained: This variation features upgraded audio-grade components, offering an even cleaner signal path with lower noise and distortion (THD), while maintaining excellent transparency and headroom. This unit can operate from either a 9V or 12V power supply, with 12V providing the max headroom (~32Vpp).

This is an all analog Stereo Blender that offers three independent parallel loops with tails capability, stereo/mono selection, dry blend, master volume control and an indepedent Headphones-out with volume control. Every loop has its own dedicated footswitch, Send/Return volume knobs, EQ, and phase reverse switch.

The device is able to handle signals varying from instrument level (guitar, bass, etc) up to higher line level (~24Vpp max). All jacks are TRS. It is compatible with mono signals as well. Mono FX-Loops can be combined wth Stereo FX-Loops (check below)

Function explanation:

• The signal is taken from the INPUT and is split into four separate signals.
• One is send to Loop-A (SND-A), one to Loop-B (SND-B), one to Loop-C (SND-C) while the fourth is the DRY signal whose volume is controlled by the DRY-knob
• The volume of each SEND signal is controlled by its respective SND knob
• The signal from the Loop-Return (RTN-A, RTN-B, RTN-C) is then fed back to the device: first through the Phase Select section, then to the EQ and then to the RTN volume knob which sets the level of the blend.
• The EQ knob when positioned at center, has no effect. Turn the knob clockwise for a darker signal (more bass). Turn the knob anti-clockwise for a brighter signal (more treble).
• The three Loop-Return signals are then mixed together with the DRY signal and sent to the OUTPUT whose level is set by the Master Volume knob.
• ***NEW FEATURE: In this 3rd version a headphones output with its own dedicated volume control has been added.
• The footswitch on the bottom right corner is used to engage or fully bypass the device.
• The A,B,C footswitches are used to mute/engage the respective loop.
• The Phase switches (0°/180°) allow you to you reverse the phase of the return signal on each loop.
• The TAILS switches offer you the option to choose if the footswitches will mute the SEND or the RETURN of each loop, giving you the option to keep the TAILS of your signal active indefinitely.
• The four (M/ST) switches let you choose if the Input and each loop separately (A,C,B) will work in STEREO or MONO mode. This helps in situations where you want to mix stereo and mono FX loops.
  
  e.g.: Let's assume that A-Loop has mono effects while B, C have stereo effects. If you tried to mix them then the return signal of the A-Loop would appear only on the Left channel in the master output. If you want the return signal of the mono A-Loop to appear equally on both L+R channels in the master output then you just have to flip the A switch to the mono position.

**** For a schematic representation of the signal flow and the device's functions check the flow chart in the photos section.

---- Technical specifications: ----
▹ True Bypass (via analog IC switches, requires power)
▹ Use of OPA167x audio grade ICs for lower noise floor and ultra-low harmonic distortion (THD).
▹ Supply Voltage required: 9-12V DC (center negative) [Do not exceed 12Volts!] The use of a regulated/stabilized power supply that can provide at least 300mA is advised.
▹ Current draw: 280mA (it will increase if you use the headphones out at high volumes)
▹ An internal circuit module provides the necessary Dual Rail voltage, for maximum headroom and stability.
▹ Output headroom: ~32Vpp @ 12V | ~16Vpp @ 9V
▹ Input & Return impedance: 2MΩ
▹ Output & Send impedance: 100Ω
▹ Flat response on the whole span of the audio frequency spectrum.
▹ Master Gain: +6dB(V)
▹ Weight: 1.1kg (aprox.)
▹ Enclosure dimensions: 222 X 147 X 56mm (8.74 x 5.78 x 2.20 in)

Shipping method: 1st Priority International Mail (tracked)