Buy Funktion One F221 Subwoofers & Res 3 Tops | musicconcertevent.com

If you have been searching for Funktion One F221 for sale as part of a complete matched system with sequential numbers, this is one of the most significant Funktion One listings you will find on the used professional audio market. At musicconcertevent.com, we have eight Funktion One F221 dual 21-inch subwoofers and eight Funktion One Res 3 full-range tops available, all with sequential serial numbers, split equally between red and black finish variants, and accompanied by two original Funktion One GSB-R ground stacking boards.

Sequential serial numbers on a batch of this size is not a detail to understate. It confirms these units were purchased and installed together as a coherent system, operated together throughout their service life, and are now available together from a single source. For buyers building or expanding a Funktion One system, matched sequential numbers mean consistent acoustic performance, consistent component age, and consistent service history across the entire batch.

The colour split is equally significant. Four red and four black units of each model provides system configuration flexibility that a single-colour batch does not. Festival and club productions that require matched aesthetics for specific stage configurations, or buyers who want to split the batch and sell red and black units to different markets, will recognise immediately why this colour distribution adds commercial value.

One critical stock detail: only 2 of the 8 Res 3 units are currently in stock and available for immediate dispatch. The remaining 6 are available but require lead time. Contact musicconcertevent.com before purchasing to confirm current stock status and delivery timeline for the full Res 3 quantity. The F221 units and GSB-R boards are available now. Everything ships worldwide from musicconcertevent.com.

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What Is the Funktion One F221 and Why It Is the Standard for Serious Sub-Bass

The Funktion One F221 is a dual 21-inch professional subwoofer and one of the most respected high-output bass cabinets in the global club and festival sound market. Where the F218 uses dual 18-inch drivers, the F221 steps up to dual 21-inch long-excursion drivers, delivering significantly higher output capability, deeper low-frequency extension, and greater physical impact at the listening position.

The F221 is specified for applications where the F218 reaches its practical output ceiling. Large outdoor festival main stages, high-capacity club installations where sustained high-SPL operation over many hours is required, and touring productions where the system must fill very large spaces consistently all benefit from the F221’s additional driver area and excursion capability. Engineers who have worked with the F221 consistently describe it as one of the most physically convincing subwoofers available in the professional touring market.

Funktion one f221 for sale, Funktion one f221 price, Funktion one f221 specs, Funktion one f221 review, Funktion one f221 used, and Funktion One f221 plans are all actively searched by engineers and production companies who know exactly what the F221 delivers and are evaluating available units before purchasing.

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Funktion One F221 For Sale: 8 Units, Sequential Numbers, 4 Red + 4 Black

Eight F221 units are available with sequential serial numbers. This is the most important condition and provenance detail in this listing. Sequential numbers confirm a single purchase batch, consistent production date, and identical component specification across all eight cabinets. For cardioid array configurations, end-fire arrays, and any deployment where matched driver characteristics produce measurably better acoustic results, sequential numbers matter.

The four red and four black finish split covers both the standard Funktion One black and the less commonly available red finish variant. Red finish F221 units are less frequently found on the used market and command attention from buyers looking for specific aesthetic configurations for club installations or festival stages where visual presentation matters alongside acoustic performance.

Funktion One F221 Specs at a Glance

Funktion One F221 Manifest

Price: €2,500 each. 8 units available.

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Funktion One Res 3 For Sale: 8 Units, Sequential Numbers, 4 Red + 4 Black

The Funktion One Res 3 is a three-way resolution loudspeaker representing an advancement in the Res Series over the Res 2 Mk1 covered in earlier listings. The Res 3 introduces a separate midrange driver section alongside the LF and HF drivers, creating a three-way design that reduces intermodulation distortion between frequency bands and delivers superior phase coherence across the full audio spectrum.

Eight Res 3 units are listed at €2,000 each, following the same four red and four black colour split as the F221 batch, and carrying sequential serial numbers that confirm they were purchased and used together with the F221 units as a matched system.

Important stock notice: only 2 of the 8 Res 3 units are currently in stock and available for immediate shipping. The remaining 6 units are available for purchase but require lead time before dispatch. Contact musicconcertevent.com before placing an order for more than 2 Res 3 units to confirm the current availability timeline.

Funktion one res 3 price, Funktion one res 3 specs, Funktion one res 3 used, Funktion one res 3 for sale, and comparisons against the Funktion One Res 2, Funktion One Res 4, and Funktion One Res 5 are all actively searched by engineers evaluating the Res Series before purchasing. The Res 3 sits above the Res 2 in the Funktion One resolution speaker hierarchy and below the Res 4 and Res 5, making it the mid-to-upper tier choice for club and touring applications that require three-way acoustic precision.

Funktion One Res 3 Specs at a Glance

Funktion One Res 3 Manifest

Price: €2,000 each. 8 total, 2 in stock now.

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Funktion One GSB-R Ground Stacking Boards For Sale: 2 Units

The Funktion One GSB-R is an original Funktion One manufactured ground stacking board designed to support two Res 3 tops on one F221 or two F121 subwoofers in a ground-stacked configuration. The GSB-R is a specific piece of Funktion One system hardware that allows safe and stable ground stacking of Res 3 tops directly onto compatible subwoofer cabinets without the need for speaker stands.

Two units are available at €250 each. These are original Funktion One branded accessories, not third-party alternatives, which matters for system integrity and buyer confidence. However, it is essential to state clearly that no hardware is included with either GSB-R unit. There are no clamps, no clasps, no tilt straps, and no anchors. The boards themselves are available but the complete hardware set required for fully secured deployment is not. Buyers must source the appropriate hardware separately before using the GSB-R in any commercial deployment where speaker stability is a safety requirement.

Funktion One GSB-R Manifest

Price: €250 each. Hardware note: no clamps, clasps, tilt straps, or anchors included.

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Complete System Summary

Total asking value (full system): €36,500.

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Estimated Retail Value and Resale Margin

Funktion One F221 Per Unit

Funktion One Res 3 Per Unit

Complete 16-Speaker System (F221 + Res 3)

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Real Profit Examples for Resellers

Example 1: You buy two F221 units at €5,000. You list each individually on GearSource at €5,500, clearly noting sequential numbers and original components. Total return: €11,000. Gross margin: €6,000.

Example 2: You buy all eight F221 units at €20,000. You sell the four red units as a matched set to a club operator wanting the red finish at €5,000 per unit. Total from red units: €20,000. You have recovered your entire investment. The four black units at €4,500 each return another €18,000. Gross margin from the full F221 batch: €18,000.

Example 3: You buy the 2 in-stock Res 3 units at €4,000. You list each on Reverb at €4,500, noting three-way design, sequential numbers, and original components. Total return: €9,000. Gross margin: €5,000.

Example 4: You buy the complete system at €36,500 and sell it as a matched Funktion One F221 and Res 3 club or festival system with sequential numbers and colour-matched pairs. A matched eight-sub and eight-top Funktion One system of this specification with sequential numbers commands €70,000 to €100,000 in the European professional club installation and touring market. Gross margin: €33,500 to €63,500.

Example 5: You deploy the complete system in a premium rental fleet. A matched Funktion One F221 and Res 3 system of eight subwoofers and eight tops commands €8,000 to €15,000 per event day for large-scale productions. Full return on investment: 3 to 5 deployments.

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What Makes the F221 and Res 3 a Complete Festival-Grade System

The combination of eight F221 subwoofers and eight Res 3 tops represents a serious festival and club-grade sound system. Understanding how these components work together in a professional deployment context helps buyers assess the full value of this listing.

The F221 at 3,200W program and 140 dB maximum SPL provides a subwoofer foundation capable of sustaining high-SPL output across large outdoor or indoor spaces without distortion or thermal compression. Eight units deployed in a configured array, whether stereo stacked, cardioid, or end-fire, deliver combined subwoofer output that fills festival main stages and large club rooms coherently.

The Res 3 at 1,600W program and 136 dB maximum SPL handles the full-range top layer from 55 Hz to 20 kHz with three-way acoustic precision. The separate midrange driver in the Res 3 means the transition between bass and treble passes through a dedicated midrange section, eliminating the intermodulation artifacts that two-way designs introduce when a single driver covers a wide frequency range. This is what gives the Res 3 its distinctive clarity and listening fatigue reduction at extended high-SPL levels.

Together, they form a system that can be deployed at festival main stage scale while retaining the acoustic accuracy associated with Funktion One’s resolution speaker philosophy. The GSB-R stacking boards allow Res 3 tops to be positioned directly on F221 or F121 subwoofers without stands, creating a compact and stable ground-stacked configuration that is practical for stages where flying infrastructure is unavailable.

Understanding the Funktion One Res Series Hierarchy

Buyers evaluating the Res 3 alongside other Funktion One Res Series models will encounter the Funktion One Res 2, Funktion One Res 4, and Funktion One Res 5 in their research. The Funktion One Evo is a separate line array product family distinct from the Res Series.

The Res 2 is a two-way resolution speaker. The Res 3 adds a dedicated midrange driver for three-way operation. The Funktion One Res 4 and Res 5 step up further in output capability and driver specification for the most demanding large-format applications. The Res 3 sits at the practical centre of the range, delivering three-way acoustic performance at a scale appropriate for medium to large club installations and touring productions without the size and cost overhead of the Res 4 and Res 5.

Best Amplifiers for the Funktion One F221 and Res 3

The F221 at 3,200W program and 4 ohms nominal impedance requires substantial amplification. MC2 E90 Mk2, MC2 E100, Powersoft K10, Powersoft K20 DSP AESOP, and Lab.gruppen FP 14000 are all appropriate choices per cabinet. Running one F221 per amplifier channel at 4 ohms is the recommended approach for sustained high-SPL festival deployments.

The Res 3 at 1,600W program requires amplifier channels delivering 2,000W to 3,000W at the speaker’s operating impedance. In bi-amp or tri-amp configuration, the three-way driver architecture may be driven from separate amplifier channels per frequency band, which requires an appropriate multi-output DSP processor and higher amplifier channel count. MC2 E60, MC2 E90, and Powersoft K3 DSP AESOP are proven pairings for the Res 3 in standard configuration.

Technical guidance on Funktion One F221 and Res 3 amplifier pairing and DSP configuration is covered at bostonprosounds.com. For broader Funktion One system design references including array configuration strategies for the F221 and Res 3, sasphonik.com provides useful technical content for engineers specifying this system for the first time.

What to Consider Before Deploying Eight F221 and Eight Res 3 Units

Eight dual 21-inch subwoofers and eight three-way tops is a large-format system deployment. Before your first commercial use, confirm the following.

Amplification requirements are substantial. Eight F221 units each requiring approximately 4,000W to 5,000W per cabinet means a minimum of eight dedicated amplifier channels of appropriate power rating. Budget for amplification before purchase.

DSP processing for the full system requires a processor with sufficient output count. Eight top channels and eight sub channels across a complete system configuration require multiple processor outputs with correctly loaded Funktion One presets. Lake LM 26, XTA DP448, or equivalent multi-output processors loaded with F221 and Res 3 system presets are appropriate.

GSB-R hardware must be sourced separately. The two GSB-R stacking boards included in this listing have no clamps, tilt straps, clasps, or anchors. Do not deploy the GSB-R in any application where speaker stability is a safety requirement without first sourcing and fitting the complete hardware set from Funktion One or an authorised supplier.

Transport logistics require significant planning. Eight F221 cabinets at approximately 100 kg each require a vehicle rated for well over 800 kg of speaker weight alone, plus appropriate loading equipment and crew.

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Why Funktion One F221 and Res 3 Hold Their Value

The F221 holds value for the same reason all serious Funktion One equipment does: engineers specify it by name, it is built to outlast production cycles, and nothing at equivalent pricing delivers the same combination of output, accuracy, and physical impact. Sequential numbers and colour consistency across a batch add a further layer of provenance documentation that generic batches of used Funktion One gear cannot offer.

The Res 3 holds value specifically because three-way designs are inherently more acoustically capable than two-way alternatives at the same price point, and Funktion One’s specific approach to three-way driver integration is well regarded by engineers who have worked with the Res Series across multiple generations. Funktion one res 3 used listings appear less frequently than Res 2 listings, reflecting a smaller supply base and sustained demand that keeps prices predictable.

Red finish units on both models are additionally valuable because they are produced in smaller quantities than black and appear less frequently in the used market. Buyers who specifically need red finish units for aesthetic reasons pay a premium for availability.

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Why Our F221 and Res 3 Units Are Different

At musicconcertevent.com, sequential serial numbers are documented and confirmed before listing. This is not a standard feature of used Funktion One listings. Most used F221 and Res 3 listings come from varied sources with different serial number ranges, different production dates, and inconsistent component histories. Eight units of each model with confirmed sequential numbers from a single system is a specific and verifiable provenance advantage.

The GSB-R boards are listed with complete hardware transparency. No clamps, clasps, tilt straps, or anchors are present, and this is stated clearly in every place where the GSB-R appears in this listing. We do not list incomplete accessories as complete. Buyers know exactly what they are receiving before purchase.

The Res 3 stock situation is also stated transparently. Two units in stock now, six units with lead time. This information is disclosed in the headline, the short description, the manifest, and the FAQ because it is information that affects the buyer’s purchase decision and timeline.

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Why Buy From musicconcertevent.com

musicconcertevent.com sells professional audio equipment directly to buyers across the United States and Europe. No broker fees, no commission structures, and no third-party markups. You deal directly with the source, receive complete and accurate condition, stock, and provenance information, and get worldwide freight shipping with full commercial documentation.

We monitor Funktion one f221 price and Funktion one res 3 price trends actively to ensure every listing reflects genuine market value. At €2,500 per F221 and €2,000 per Res 3 for units with sequential numbers and original working components, this listing is priced well below current secondary market rates for matched Funktion One units of this specification.

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How We Compare to Other Sellers

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Shipping Policy: USA and International

We ship worldwide. For buyers in the United States, dual 21-inch subwoofer cabinets and large-format tops ship via LTL freight, palletized and professionally wrapped. Typical transit time within the continental US is 5 to 10 business days after collection. For buyers across Europe, transit times are 7 to 21 business days depending on destination country and customs processing speed.

All shipments are palletized, professionally wrapped, and fully insured. You receive tracking information and all freight documentation once dispatched. We manage all export paperwork for international orders.

For EU buyers: VAT and import duties are the buyer’s responsibility. We provide complete commercial invoice documentation to support smooth customs clearance in your country.

We do not offer local pickups. All sales are conducted online only. The sole exception is truckload purchases, which may qualify for a scheduled collection by prior arrangement. For all standard unit purchases the transaction is fully remote and fulfilled via professional freight.

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Where to Sell Funktion One F221 and Res 3 After Purchase

• GearSource: the primary B2B professional AV marketplace. F221 and Res 3 listings with sequential numbers and colour documentation attract the most serious production company and festival production buyers who use GearSource specifically for high-value Funktion One acquisitions.
• Reverb: active Funktion One community with consistent search demand for F221 and Res 3 units. Red finish units in particular attract motivated buyers who have been searching specifically for them.
• eBay: high traffic with active search demand for Funktion one f221 for sale and Funktion one res 3 for sale. Sequential number documentation and colour specification differentiate listings in a competitive marketplace.
• Facebook Marketplace: effective for regional club operators and production companies who prefer local collection for large subwoofer cabinets.
• LinkedIn: highly productive for reaching festival production managers, venue owners, and AV integrators who specify Funktion One systems at scale and make volume purchasing decisions.

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Frequently Asked Questions

What is the Funktion One F221 price on the used market?

Used Funktion One F221 units in working condition with original components typically sell between €4,000 and €8,000 per unit depending on condition, serial number provenance, and finish. We are offering eight units at €2,500 each with sequential numbers, original working components, and a four-red four-black colour split, which is well below current secondary market rates for matched F221 units.

What are the Funktion One F221 specs?

The Funktion One F221 is a dual 21-inch professional subwoofer with two long-excursion 21-inch drivers, a frequency response from 28 Hz to 100 Hz, 3,200W program power handling, 102 dB sensitivity at 1W/1m, 140 dB maximum SPL, and 4 ohms nominal impedance. It uses a birch ply touring-grade enclosure with Speakon NL4 connectors.

What are the Funktion One Res 3 specs?

The Funktion One Res 3 is a three-way resolution loudspeaker with a custom LF woofer, a dedicated midrange driver, and a proprietary Funktion One compression driver. Frequency response runs from 55 Hz to 20 kHz with 1,600W program power handling, 103 dB sensitivity at 1W/1m, and 136 dB maximum SPL. It uses a birch ply touring enclosure with Speakon NL4 connectors.

What is the Funktion One Res 3 price on the used market?

Used Funktion One Res 3 units in working condition with original components typically sell between €3,500 and €7,000 per unit. We are offering eight units at €2,000 each with sequential numbers and original working components, which is significantly below current secondary market rates. Note that only 2 units are in stock for immediate dispatch, with 6 units requiring lead time.

How many Res 3 units are available immediately?

Only 2 of the 8 Res 3 units are currently in stock and available for immediate shipping. The remaining 6 units are available for purchase but require lead time before dispatch. Contact musicconcertevent.com before ordering more than 2 Res 3 units to confirm the current availability timeline.

What are the GSB-R stacking boards compatible with and what hardware is missing?

The Funktion One GSB-R is designed to support two Res 3 tops on one F221 or two F121 subwoofers in a ground-stacked configuration. The boards are available at €250 each. However, no hardware is included. There are no clamps, clasps, tilt straps, or anchors with either unit. Do not use the GSB-R for live deployment without sourcing the complete hardware set from Funktion One or an authorised supplier first.

What does sequential serial numbers mean and why does it matter?

Sequential serial numbers confirm that the units in a batch were manufactured in the same production run, purchased together, and used together as a system. This confirms consistent component age, identical specification across all units, and a shared usage history. For cardioid or end-fire subwoofer array configurations where matched driver characteristics produce measurably better acoustic results, sequential numbers are a specific and verifiable advantage over randomly sourced units with mixed serial number ranges.

How does the Funktion One Res 3 compare to the Res 2, Res 4 and Res 5?

The Funktion One Res 2 is a two-way resolution speaker. The Res 3 adds a dedicated midrange driver for three-way operation, improving phase coherence and reducing intermodulation distortion. The Funktion One Res 4 and Res 5 step up further in output capability and driver specification for larger-scale applications. The Funktion One Evo is a separate line array product family. The Res 3 sits at the mid-to-upper tier of the resolution speaker range, appropriate for medium to large club and touring applications.

What amplifier do I need for the Funktion One F221?

The F221 at 3,200W program and 4 ohms nominal impedance requires amplifier channels delivering 4,000W to 5,000W at 4 ohms. MC2 E90 Mk2, MC2 E100, Powersoft K10, Powersoft K20 DSP AESOP, and Lab.gruppen FP 14000 are appropriate pairings. Run one F221 per amplifier channel at 4 ohms for sustained high-SPL professional deployments.

Does musicconcertevent.com ship to the USA and Europe?

Yes. We ship worldwide including all US states and all EU countries. Large-format subwoofer and top cabinets ship via LTL freight, palletized and insured. Transit times within the US are 5 to 10 business days. For Europe, allow 7 to 21 business days. We manage all export documentation. Import duties and VAT are the buyer’s responsibility.

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Legal Disclaimer

All equipment listed on musicconcertevent.com is sold as professional secondhand audio gear. Sequential serial numbers and component status are confirmed as described prior to listing. Stock availability for Res 3 units is stated accurately at time of listing and is subject to change. GSB-R hardware absence is disclosed fully and accurately. No warranty is provided beyond what is explicitly stated. Buyers are responsible for confirming compatibility with their existing systems, sourcing any missing hardware for the GSB-R, and for all applicable import duties, taxes, and local regulations. All transactions are conducted at the buyer’s discretion.

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All F221 units and GSB-R boards are available now at musicconcertevent.com. Eight Funktion One F221 subwoofers at €2,500 each with sequential numbers and a four-red four-black split, two Funktion One GSB-R ground stacking boards at €250 each with no hardware included, and eight Funktion One Res 3 tops at €2,000 each with 2 in stock now and 6 with lead time. A matched Funktion One F221 and Res 3 system of this scale, with sequential numbers and colour documentation, does not appear on the used professional audio market regularly. Contact musicconcertevent.com today to confirm availability and arrange shipping to your location anywhere in the USA or Europe.