Akashic Guitar effects PCB lookup
DRIVEHILEVELLO

125B · 4 knobs

PCB Guitar Mania

Lo-filter 7

Based on the Ibanez LF7 Lo-Fi Filter

Category
EQ / Filter· Lo-Fi Filter
Controls
Drive · Hi · Level · Lo
Difficulty
Advanced
Price
€11.90out of stock

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From the vendor

Project overview

The Lofilter 7 puts the Ibanez LF7 Tone Lok Lo-Fi Filter Pedal in your hands.

This classic from 2001 features voltage controlled high and low pass filters that work together to create dreamy sounds reminiscent of transistor radios and megaphones, so get ready for amazing retro waves!

Introduction

In 2001, the Ibanez LF7 was released as part of the Tone-Lok series and almost immediately got early adopters like Dino Cazares of Fear Factory and Head and Munkey of Korn.

To create this new sensation, Ibanez paired two EQ filters with drive and volume controls on push-push knobs that could be pressed in and recessed inside the pedal. This unique “Tone-Lok” design was implemented to stop players from moving the controls with their feet mid-gig.

The LF-7 wasn’t only designed for guitar use; Ibanez itself describes it as useful in “any mix-down context.” It shines the best at the end of a signal chain in combination with other pedals and creates vast, wild soundscapes of far-out tones that used to require a rack of vintage analog gear. It also performs well with vocals, drum machines, or in any mix-down context.

We had our fair share of fun testing it, and so far, the mic setting is one of my favorite type of distortion. The pick attack is relatively clean but has a unique buzz in choir territory. So you don’t lose your pick attack or response but still get lots of gain, similar to a treble booster.

Controls

Potentiometers

• DRIVE

• HI

• LEVEL

• LO

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Lofilter 7 1v1 – Building Docs

Lofilter 7 1v0 – Building Docs

Lofilter 7 – Drilling template

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 75 rows

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RefValueNormalizedTypeNotes
Resistors 46
R34100k100k
R3510k10k
R11k1k
R3610k10k
R2470k470k
R374k74.7k
R32k22.2k
R38510k510k
R42k22.2k
R3910k10k
R5100k100k
R40470R470
R61k1k
R41100k100k
R71k1k
R426k86.8k
R810k10k
R4310k10k
R93k3k
R4410k10k
R103k93.9k
R451m1M
R1110k10k
R46100k100k
R12240k240k
R1310k10k
R14100k100k
R151k1k
R161k1k
R1727k27k
R18220R220
R19220R220
R202k22.2k
R212k22.2k
R227k57.5k
R2327k27k
R2410k10k
R2527k27k
R2610k10k
R27220R220
R28220R220
R2927k27k
R3010k10k
R318k28.2k
R3210k10k
R3310k10k
Capacitors 17
C111u1u
C1510u10u
C16100u100u
C17220u220u
C1100n100n
C239n39n
C368p68p
C4150n150n
C510n10n
C622n22n
C78n28.2n
C822n22n
C91n21.2n
C102n22.2n
C1212n12n
C1368p68p
C141u1u
Diodes 3
D11N41481N4148
D21N41481N4148
D31N40041N4004
Transistors 1
Q12N50882N5088
ICs 4
IC1NJM4558NJM4558
IC2NJM13600NJM13600
IC3NJM13600NJM13600
IC4NJM4558DNJM4558D
Potentiometers 4
DRIVEA50KA50kPotentiometer
HIB20KB20kPotentiometer
LEVELB100KB100kPotentiometer
LOA20KA20kPotentiometer