Marantz - EQ-340 Custom Fiber-Optic Edition (One-off build) Stereo graphic equalizer
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Expert
Selected by Ariel Cabello
Holds dual bachelor's degrees in electronics and physics with 20 years in audio engineering.
Estimate € 430 - € 480
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Description from the seller
Marantz EQ-340 – Custom Fiber-Optic Edition (One-off build)
This is not a standard EQ-340. It is a fully modified example with hand-applied fiber optic lighting per band controller, combining functionality with an aesthetic response grid. There is literally only one of this type.
Anyone who thinks that 'just putting up some lights' is a simple hobby project is completely mistaken.
For each frequency section is:
The internal rail opened
The original mechanical slider base adjusted
A fine-mesh bundle of optical fibers split, shortened, polished, and fixed.
The light distribution block custom positioned.
The LED drivers are safely dimensioned relative to the original rail load.
Per slider, the roughly 45–70 minutes of production time includes precision drilling, bundle placement, fixing, and testing.
With 12 sliders per channel and 24 in total, you're talking about over 25 hours of work just on lighting technology, excluding dismantling, revision, wiring-routing, and thermal management.
The case has an external OEM look, functional and matching Marantz full-metal design from the same period. Nothing flashy, but futuristic enough to stand out in a high-end vintage rack.
Technical highlights
Marantz EQ-340 base platform
Fully functioning 2-channel 12-band equalizer
Custom fiber-optic illumination, blue spectrum
Individual light points per slider
Separate power supply and resistance bank for the purpose of thermal stability.
• Input-select (Tape 1/Tape 2/Source) operational
• Frontplate aluminium; topplate vintage honey-finish
Performance & Use Case
This device is built for users who assemble their chain modularly and want visual feedback on micro-EQ shifts.
It does not position itself as a toy, but as a statement component within a premium setup.
particularly suitable for studio-style stacks
Seller's Story
In accordance with EU consumer law, returns are accepted within 14 days of receipt. Return shipping costs are to be paid by the buyer. Returned items must be in their original, undamaged condition. If the buyer doesnt pay within 3 days, according to the Catawiki seller contract, it is possible we cancel the deal. You can get your money back by contacting Catawiki when you have not paid within the 3 days. Contact us if you are not able to pay on time.
Marantz EQ-340 – Custom Fiber-Optic Edition (One-off build)
This is not a standard EQ-340. It is a fully modified example with hand-applied fiber optic lighting per band controller, combining functionality with an aesthetic response grid. There is literally only one of this type.
Anyone who thinks that 'just putting up some lights' is a simple hobby project is completely mistaken.
For each frequency section is:
The internal rail opened
The original mechanical slider base adjusted
A fine-mesh bundle of optical fibers split, shortened, polished, and fixed.
The light distribution block custom positioned.
The LED drivers are safely dimensioned relative to the original rail load.
Per slider, the roughly 45–70 minutes of production time includes precision drilling, bundle placement, fixing, and testing.
With 12 sliders per channel and 24 in total, you're talking about over 25 hours of work just on lighting technology, excluding dismantling, revision, wiring-routing, and thermal management.
The case has an external OEM look, functional and matching Marantz full-metal design from the same period. Nothing flashy, but futuristic enough to stand out in a high-end vintage rack.
Technical highlights
Marantz EQ-340 base platform
Fully functioning 2-channel 12-band equalizer
Custom fiber-optic illumination, blue spectrum
Individual light points per slider
Separate power supply and resistance bank for the purpose of thermal stability.
• Input-select (Tape 1/Tape 2/Source) operational
• Frontplate aluminium; topplate vintage honey-finish
Performance & Use Case
This device is built for users who assemble their chain modularly and want visual feedback on micro-EQ shifts.
It does not position itself as a toy, but as a statement component within a premium setup.
particularly suitable for studio-style stacks
Seller's Story
In accordance with EU consumer law, returns are accepted within 14 days of receipt. Return shipping costs are to be paid by the buyer. Returned items must be in their original, undamaged condition. If the buyer doesnt pay within 3 days, according to the Catawiki seller contract, it is possible we cancel the deal. You can get your money back by contacting Catawiki when you have not paid within the 3 days. Contact us if you are not able to pay on time.
Details
Era
1900-2000
Brand
Marantz
Model
EQ-340 Custom Fiber-Optic Edition (One-off build)
Multiple Models
No
Physical condition
Excellent
Nr of items
1
Includes
+ Extra item (see description), Power cord, Refurbished
Serial Number
51n090033
Year of Manufacturing
1982
Weight
4.2 kg
Functional condition
Tested and working/playable
Height
12 cm
Width
43 cm
Depth
22 cm
