The Filter FX Loop is a utility pedal used for mixing any external effect with your clean signal while offering filtering, level, and phase controls for further tone shaping.

 The Filter FX Loop works by splitting your signal into two parallel paths: Clean and Effect.

The Clean path has LPF and Level controls (white knobs).
The Effect path has HPF, LPF and Level controls (blue knobs) as well as a phase switch. The HPF is placed before the effect, while the LPF, Level, and Phase controls are post effect.
The two signals are summed together and sent to the output.
 
The filters can be used to alter the feel and performance of an effect. Experiment with your effects to find new possibilities.

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Filter FX Loop

 

The SV-Pre is a JFET preamplifier that has been modeled after the preamp section of the 70s SVT. Each gain stage has been carefully designed to capture the feel of warmth and breakup found on the original amp. Coupled with a cab sim, you could have the monstrous tone of the classic bass amp stack without the challenge of transporting 250 pounds of gear.

 

In addition to the gain stage design, the EQ and tone switches have been designed to give the same response as those on the original amp. The Bass and Treble controls are the standard James stack configuration, having a shelving response of the lows and highs. The eq is flat when at noon.

 

The middle control uses a simulated inductor to emulate the same frequency response and width of the mid control on the SVT. Instead of three fixed frequencies, the frequency knob continuously varies from 220 to 3k Hz. The mid eq is flat when at noon.

 

The Low toggle switch uses the same circuitry as the three-way Ultra lo switch on the SVT. With the toggle to the right, a 2-pole high pass filter is applied, and allows for a more natural drive tone. With the toggle in the middle position, the low end is unaffected. With the toggle in the left position, a slight scoop is applied, emphasizing deep lows and treble frequencies. The Bright toggle switch applies a treble boost, and is more pronounced at lower gain settings.

 

A Master volume knob has been added on the output to set the overall level. Use the Gain knob to set the desired amount of warmth and overdrive. The Gain knob is equivalent the the Volume knob on the 70s SVT.

 

The pedal requires a 9V DC power supply (not included). Do not exceed 9V as this will damage the pedal. The DC supply should be a standard Boss style connector, center negative polarity. The current draw is approximately 20 mA.

 

Power Supply Notes

The JFETs are sensitive to power supply noise. Ideally you should use a clean power supply that is isolated from other pedals (i.e. not daisy chained). Some switch mode power supplies tend to be more noisy and should be avoided. Use a good quality, isolated supply and the SV-Pre will perform with very low noise.

 

The SV-Pre has a true bypass switch.

 

Review by 
Theo And His Pedals - Red

Demo by Hondo Felder Music

SV-Pre

The Buffer Bandwidth Amplifier is an always on utility pedal that improves your signal to noise ratio, provides consistent tone and clarity in any setup, and filters out unwanted subsonic and ultrasonic frequencies.

The BBA is designed to be transparent, capturing and preserving your natural tone. Whether you have a huge pedal board, or just go straight to the amp, the BBA provides a consistent impedance for your pickups. Long cable lengths no longer rob you of your high end. Cycling different pedals on and off no longer give unexpected loading on your pickups. The BBA can reliably feed your signal into a variety of devices such as pedals, preamps, DI boxes, amplifiers, mixers, and recording interfaces.

Buffer Bandwidth Amplifier

The Omnicomp is a fully featured optical compressor that combines the precision and clarity of the Apex with the presence and tone of the Monocomp. The Omnicomp is so flexible it can be used on a pedal board for live use, or in a studio for precision compression for all of your tracks.

 The Omnicomp is built with an internal 30 volt regulated supply to be able to cleanly and clearly handle signals all the way up to line level. The audio path is driven by a Burr Brown op amp for superior audio performance and extremely low noise. The compression element is a vactrol--an optical element that provides musical compression that is easy dial in.

 The side chain of the Omnicomp contains a gentle high pass filter that gets more steep for very low frequencies. This is tuned so that bass heavy instruments will not overly trigger the compression. Bass, guitar, drums, and vocals all work well with this compressor, with very even compression across their bandwidth.

Review by reddit /basspedals

Review by Compressor Pedal Reviews

Omnicomp

The Fliptop is a JFET preamplifier that is modeled after the B15 amplifier. The gain staging and EQ sections were carefully designed to give the feel and response of the vintage tube amp, offering a good range of pillowy tone that can be driven to the point of light overdrive if pushed.

 In addition to the James stack EQ and gain staging, the Fliptop adds a Master volume control on the output so you can dial in the amount of drive you want while adjusting the volume as needed.

 The Cab knob is essentially a wet/dry control, allowing you to apply 0 to 100% of the cab tone to the preamplifier output. Dialing in more of the cab response tightens the low end and cuts the high frequencies for a warm, vintage tone. The frequency response is modelled after the 15" cab.

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