Boss - Multiple models - Effect pedal

Brand: BOSS
Models: BF-2 Flanger / OD-2 TURBO OverDrive
Type: Vintage Analog Effects Pedal Set
Made in: Japan / Taiwan
Serial numbers: BF-2: 153600 / OD-2: CB08431
Colour: Purple / Yellow

Vintage BOSS effects pedal set combining two distinctive analogue-era models from different periods of BOSS production.

This listing is for a set of two vintage BOSS compact effects pedals:

BOSS BF-2 Flanger — Made in Japan — estimated February 1982 production lot

BOSS OD-2 TURBO OverDrive — Made in Taiwan — estimated early 1990 production

Both pedals have been carefully cleaned, inspected, serviced where necessary, and fully tested.

The BF-2 represents the early Japanese analogue BBD era of BOSS compact effects, while the OD-2 reflects the later transition into Taiwanese production while retaining a distinctive discrete overdrive circuit design.

Together, these two pedals provide an interesting overview of approximately eight years of BOSS compact-pedal development, from early-1980s Japanese analogue modulation to the early-1990s generation of BOSS overdrive design.

**Key Features & Condition**

BOSS BF-2 Flanger

Serial number: 153600

Made in Japan

Black label

Black screw

ACA specification

Estimated February 1982 production lot

Analog BBD flanger circuit

All major electronic components appear original

Carefully cleaned, inspected, and serviced

Tested and confirmed working properly with both an ACA-compatible adapter and 9V battery

New replacement rubber bushing installed because the original was missing

BOSS OD-2 TURBO OverDrive

Serial number: CB08431

Made in Taiwan

Black label

ACA specification

Estimated early 1990 production

Discrete overdrive circuit design

TURBO mode

Carefully cleaned and inspected

Tested and confirmed working properly with both an ACA-compatible adapter and 9V battery

Replacement rubber bushings installed

DC jack replaced with a new compatible part because the original internal switching mechanism had failed

Battery operation fully restored

Both pedals show scratches, marks, paint wear, dirt, oxidation, and other cosmetic signs of genuine use consistent with vintage equipment.

At the time of testing, no noticeable scratchiness was present in the controls.

However, these are vintage electronic devices with components and contacts that are several decades old. Although they are currently operating properly, it is not possible to guarantee that scratchiness or contact noise will not occur in the future. Such symptoms may develop depending on age, storage conditions, transportation, temperature, humidity, or continued use.

Please refer carefully to the photographs for detailed cosmetic condition.

**BOSS BF-2 Flanger**

The BF-2 Flanger was introduced in 1980 and became one of BOSS’s longest-running and most recognizable analogue modulation pedals.

This particular example is an early Japanese-made black-label unit with a black screw and ACA power specification.

The pedal uses a classic analogue BBD flanger circuit and is equipped with four controls:

MANUAL

DEPTH

RATE

RES

Its sound ranges from subtle modulation and chorus-like movement to deep metallic flanging and pronounced jet-style sweep effects.

Based on the serial number, internal PCB markings, IC configuration, and component markings, this unit is estimated to belong to approximately the February 1982 production lot.

Because BOSS serial numbers from this period are generally understood as lot-based production codes rather than exact individual manufacturing dates, February 1982 should be regarded as an estimated production lot rather than a precise build date.

**BF-2 Maintenance Details**

The jack contacts were removed and polished to remove oxidation.

Before servicing, the MANUAL and DEPTH potentiometers exhibited slight scratchiness.

For this reason, all potentiometers were serviced.

Oxidation was removed from the wiper areas, the carbon tracks were cleaned with electronic cleaner, and contact conditioner was applied.

After servicing, all controls were checked again and no noticeable scratchiness was present at the time of testing.

Because this is a vintage electronic device, continued completely noise-free operation of the potentiometers cannot be guaranteed. Scratchiness or contact noise may occur in the future due to age, storage, transportation, environmental conditions, or continued use.

The original rubber bushing was missing, so a new replacement rubber bushing has been installed.

The pedal was tested using both an ACA-compatible adapter and a 9V battery and operates properly.

**BF-2 Estimated Production Period**

Estimated production lot: February 1982

Serial number: 153600

The first two digits “15” correspond to approximately February 1982 when interpreted using the commonly referenced BOSS six-digit serial dating method for this period.

**BF-2 Production Dating Evidence**

PCB markings:

BF-2 2291033200

BF-2 / ET-54A / ET5211-510A

Major IC configuration:

JRC 4558D ×2

MN3207 BBD

MN3102 clock driver

TL022CP

78L05AV voltage regulator

This configuration is consistent with the early Japanese BF-2 analogue BBD circuit design.

Several internal components also carry markings consistent with approximately 1981 manufacture, supporting an early-1982 assembly estimate.

Documented examples include:

JRC 4558D marking: 1478

78L05AV marking: 8122

MN3102 marking: 1D

ALPS potentiometers marked 214N

These individual markings do not establish an exact assembly date by themselves, but taken together they support an early-1982 production estimate.

All major electronic components appear original, and no visible signs of electronic component replacement were identified during inspection.

**BOSS OD-2 TURBO OverDrive**

The BOSS OD-2 TURBO OverDrive was introduced as a later development in the lineage of BOSS overdrive pedals.

Unlike many conventional overdrive designs based primarily around an operational-amplifier IC, the OD-2 uses a discrete circuit constructed from individual transistor and FET components.

With TURBO mode switched OFF, the pedal produces a smoother and more traditional overdrive response.

With TURBO mode switched ON, the available gain increases substantially, producing a more aggressive and saturated drive sound.

The dedicated TONE control also provides greater tonal flexibility than the earlier OD-1 design.

Controls:

LEVEL

TONE

DRIVE

TURBO

This particular unit is a black-label Made in Taiwan example with serial number CB08431.

It is an ACA-specification BOSS pedal.

Based on the serial number format, black-label specification, hardware type, and overall component consistency, the pedal is estimated to have been manufactured around early 1990.

The date should be regarded as an estimated production period rather than an exact individual manufacturing date.

**OD-2 Maintenance Details**

The deteriorated rubber bushings have been replaced with new replacement parts.

The original DC jack had developed a failure in its internal switching mechanism, preventing normal battery operation.

The DC jack was therefore replaced with a new compatible part.

After replacement, normal battery operation was fully restored.

The pedal was tested with both a 9V battery and an ACA-compatible power adapter and operates properly.

No noticeable scratchy potentiometers or abnormal switching noise were observed at the time of testing.

As with any vintage electronic device, however, future freedom from scratchiness cannot be guaranteed. Scratchiness or contact noise may occur due to age, storage, transportation, environmental conditions, or continued use.

**OD-2 Estimated Production Period**

Estimated production: early 1990

Serial number: CB08431

Made in Taiwan

The estimate is based on the serial number format together with the black-label specification, hardware type, and overall component consistency.

**Signal Design & Historical Interest**

These two pedals represent distinctly different areas of BOSS analogue effects development.

The BF-2 uses an analogue BBD delay architecture to create its modulation effect.

By continuously varying a delayed signal and combining it with the original signal, the circuit creates the characteristic comb-filtering movement associated with analogue flanging.

The MN3207 BBD and MN3102 clock-driver combination is central to the classic analogue BF-2 design.

The OD-2 approaches signal processing from a different direction.

Its overdrive circuitry is built around discrete transistor and FET stages rather than a conventional main op-amp clipping architecture.

This design gives the OD-2 its distinctive response and allows the TURBO circuit to provide a noticeably more aggressive gain structure when engaged.

Together, the two pedals illustrate two different approaches to analogue signal processing used by BOSS during the 1980s and early 1990s:

Analogue BBD time-based modulation in the BF-2

Discrete transistor/FET overdrive in the OD-2

**Production Background & Historical Context**

BOSS introduced its compact pedal format in the late 1970s and rapidly established one of the most recognizable effects-pedal platforms in the world.

The early Made in Japan period is particularly associated with the development of many analogue circuits that later became long-running standards within the BOSS catalogue.

The BF-2 Flanger was introduced in June 1980 during this period.

Its combination of four practical controls, robust construction, and a fully analogue BBD-based signal path allowed players to obtain a broad range of modulation sounds in a compact format.

From subtle movement to dramatic jet-style flanging, the BF-2 became one of BOSS’s most enduring modulation designs.

This example, estimated from approximately February 1982, belongs to the relatively early Japanese black-label production period.

Its internal components, including the MN3207 BBD, MN3102 clock driver, JRC operational amplifiers, and period component markings, are consistent with this early production era.

The OD-2 TURBO OverDrive represents a later stage of BOSS development.

Introduced in the mid-1980s, the OD-2 expanded the company’s overdrive concept with a dedicated TURBO mode and TONE control.

Its discrete circuit architecture distinguishes it from many overdrive pedals built around conventional operational-amplifier clipping arrangements.

By approximately 1990, BOSS production was increasingly shifting toward Taiwan.

The OD-2 offered here is a black-label Made in Taiwan example estimated from around this transitional period.

This makes the pair particularly interesting from a historical perspective.

The BF-2 represents early-1980s Made in Japan analogue production, while the OD-2 represents approximately eight years of subsequent development and the transition into Taiwanese manufacturing.

Although they were designed for completely different effects—flanging and overdrive—both demonstrate the practical engineering, durable enclosure design, and stage-oriented functionality that helped establish BOSS compact pedals as an industry standard.

For players, the set offers two very different classic analogue sounds.

For collectors, it provides an interesting pairing of two production eras within the history of BOSS compact effects.

**Condition Details**

Both pedals are fully functional and operate as intended at the time of testing.

BOSS BF-2:

There are visible scratches, marks, paint wear, dirt, oxidation, and some rust consistent with vintage use.

The pedal has been carefully cleaned overall.

The jack contacts and potentiometers have been serviced as described above.

The original rubber bushing was missing and has been replaced with a new replacement part.

All major electronic components appear original.

BOSS OD-2:

There are visible scratches, marks, paint wear, dirt, and other age-related cosmetic signs consistent with vintage use.

The deteriorated rubber bushings have been replaced.

The DC jack has been replaced with a compatible new part because the original internal switching mechanism had failed.

Battery operation has been fully restored.

Both pedals have been thoroughly tested after servicing.

At the time of testing, no noticeable scratchiness was present.

However, due to the age of these vintage pedals, future completely scratch-free operation cannot be guaranteed. Potentiometers, switches, and other electrical contacts may develop scratchiness or contact noise due to age, storage, transportation, environmental conditions, or continued use.

Please refer carefully to the photographs for detailed cosmetic condition.

**Power Supply (Important)**

BOSS BF-2:

9V battery or ACA-compatible external power supply.

This is an ACA-specification vintage BOSS pedal.

BOSS OD-2:

9V battery or ACA-compatible external power supply.

This is also an ACA-specification vintage BOSS pedal.

Neither batteries nor AC adapters are included.

**Included**

No accessories included.

Pedals only.

**Shipping & Import Charges**

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