Boss DD-3 Digital Delay Long Chip MIJ Blue Label Made in Japan

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Boss DD-3 Digital Delay – 1987 Long Chip Blue Label

Condition

This effects pedal is rated as Excellent condition. This unit has been thoroughly cleaned and tested with 9v battery and compatible power supply. We replaced the original deteriorating rubber screw gasket. There are minor scuffs and scratches on the exterior. There are no issues that impact sound or functionality. The serial number indicates a build date of March 1987 making it a “Long Chip” MIJ version with an identical delay circuit to the earlier DD-2. All functions are operational. The original packaging and instructions are not included.

Can't decide between the DD-2 and DD-3? Check out our blog post comparing the DD-2 with early and later DD-3 versions.

Professor’s Notes

The long-chip DD-3 is the sleeper: the same core circuit as the legendary DD-2, but packaged as a no-nonsense working player’s delay. The repeats are crisp without being cold, the feel is immediate, and it sits in a mix like it was born there — not a “feature list,” just a finished tool you can trust night after night.

Professor’s Tips

• Start with the “tape trick,” digitally: set Delay Time ~300–450ms, Feedback low (2–3 repeats), and Effect Level just under unity — instant depth without clutter.
• Slapback that doesn’t shout: 50–110ms, 1 repeat, low mix. It thickens cleans and tightens overdrive without announcing “delay.”
• The DD-3 loves edge-of-breakup. Put it after drives for the most natural, record-ready repeat shape.
• Keep Feedback conservative live. This circuit stays articulate; too much Feedback can crowd your transients fast. Two to four repeats is the sweet spot for most songs.
• Use the Direct Out intentionally. Run Direct Out to your main amp and Effect Out to a second amp/return for width that’s clean and controlled (and still feels like “your guitar,” just larger).
• For dotted-eighth-ish parts without tap tempo: set the time by ear to the song once, then leave it — the DD-3 rewards commitment more than constant tweaking.

Specifications

Power: 9V DC Dry Battery, AC Adaptor (DC 9V) - BOSS PSA-120 or PSA-120T, Optional

Current Draw: 45mA ~ 65mA (9V DC)

Controls:

EFFECT LEVEL

FEEDBACK

DELAY TIME

MEMORY SELECOR SWITCH

Others:

NORMAL/EFFECT CHANGEOVER (HOLD ON/OFF)FOOTSWITCH

Jacks:

INPUT

DIRECT OUTPUT

MAIN OUTPUT

AC Adaptor (DC 9V) - BOSS PSA-120, PSA-120T, PSA-220 or PSA-240)

System: ANALOG LOGARITHMIC COMPRESSION AND 12 BITS QUANTIZING SYSTEM

Delay Time:

12.5ms(MIN) to 800ms(MAX)

S(SHORT) 50ms (12.5ms to 50ms)

M(MIDDLE) 200ms (50ms to 200ms)

L(LONG) 800ms (200ms to 800ms)

Hold Time:

200ms(MIN) to 800ms(MAX) in Hold Mode

Frequency Responce:

DELAY SOUND:40Hz to 7kHz/ +1-3 dB

DIRECT SOUND:10Hz to 60kHz/ +1-3 dB

Residual Noise:

-95 dBm (IHF-A)

Input Impedance:

1 M Ohm

Output Load Impedance:

10k Ohms or more

Dimensions:

70(W) x 55(H) x 125(D) mm

2-3/4(W) x 2-3/16(H) x 5(D) inches

Weight:

450g / 1 lb