
MAD PROFESSOR Royal Blue Overdrive/FAC (Mad Professor) Overdrive
Product Condition
Brand New | Unused, as sold. |
---|---|
Mint | Like new, no flaws. |
Excellent | Barely used, very minor wear. |
Very Good | Light wear, fully functional. |
Good | Visible wear, plays fine. |
Fair | Heavy wear, still playable. |
Couldn't load pickup availability
Description
Description
The Royal Blue Overdrive (RBO) is an overdrive with a wide range of tones, from light overdrive to distortion, and can also be used as a booster with EQ when the distortion knob is set to minimum.
It can also produce a hard-attack crunch sound reminiscent of a tube amp, and with minimal filtering it delivers a transparent overdrive tone, with both the Treble and Bass controls allowing for further tone adjustment.
Like a top-of-the-line boutique amplifier, the RBO lets you freely control the amount of distortion by adjusting the guitar volume knob or the strength with which you pick the strings. The RBO adds incredible expressive power to clean tones and slightly overdriven amp sounds.
[SPECIFICATIONS]
■CONTROLS
VOLUME: Adjusts the overall output level.
DISTORTION: Controls the distortion of the dynamic response, which is sensitive to picking strength.
TREBLE: A shelving-type equalizer that boosts or cuts the high end in the same frequency range as the amplifier's presence control. This can add sparkle to a bright-toned amplifier without interfering with the amplifier's treble boost.
BASS: A shelving-type equalizer that boosts or cuts the low end just above the resonance produced by a standard 4x12 cabinet. Increasing both Bass and Treble will give you a heavy, scooped mid-range sound. Lowering the knob settings will give you a softer mid-boosted sound.
■SETTINGS
For Midboost: Set the Treble and Bass controls fully counterclockwise.
For Midcut: Set the Treble and Bass controls fully clockwise.
■ELECTRICAL SPECIFICATIONS
Current draw: 3.5mA at 9V DC
Input impedance: 140k Ohms
Output impedance: 25k Ohm
Voltage range: 7.5-12V
POWER REQUIREMENTS: 006P/6F22 9V battery or power supply (center negative, 2.1 mm plug)
----------------------------- About MAD PROFESSOR -----------------------------
Mad Professor Amplification is a guitar effects and amplifier brand founded in Finland in 2002. It is the largest effects brand in the Finnish market, and its high-quality effects are used by guitarists around the world. It is a one-of-a-kind brand that impresses even enthusiastic effects enthusiasts and professional musicians. Our belief is in tone, sound, and music itself.
【※Please note】
Please note that as the entire process, from assembly to painting, is done by hand, there may be cracks or unevenness in the paint.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
For orders exceeding Paypal’s transaction limit of 1 million yen, we will provide more details. For secure transactions, items will only be shipped to the address registered in your Paypal account.
Regarding detailed information and contact information to us, please check FAQ.
Please Note
The following information applies to international orders.
■ Condition
Items with “USED” in the product name are pre-owned and will be delivered as shown in the photos. Signs of wear may be present. All items are function-tested by our staff and rechecked before dispatch.
■ Stock
Many products are stocked across Ikebe stores in Japan. As a result, shipment may take several days. In-store sales may also cause items to sell out. If an item is unavailable, we will contact you promptly; in that case, the order will be canceled and any payment will be refunded.
■ Shipping
We ship via FedEx. Shipments are fully insured against damage or loss during transit.
- Asia: 10–20 days (estimated)
- North America & Oceania: 20–30 days (estimated)
Shipping costs are calculated based on the delivery address and confirmed at the time of dispatch.
■ Taxes & Duties
Import duties, taxes, and fees are the buyer’s responsibility and are not included in the item price or shipping cost. These fees are typically collected by the carrier upon delivery or at pickup. Please check with your country’s customs office for details before purchasing.
■ Other
We cannot declare a reduced item value or mark purchases as gifts.
* Warranty
Our product warranty is valid only within Japan.
* Voltage
All electrical products are intended for the Japanese market and are designed for 100 V operation.

About us
Founded in 1975, Ikebe Music is one of Japan's largest general music stores.Thanks to its long history and proven track record, it has earned the trust of musicians and music fans not only in Japan but around the world.
Ikebe Music ships not only within Japan, but also overseas.As a well-known retailer of used musical instruments in Japan, we have a wide selection of used and vintage instruments.
We have a wide variety of unusual and rare instruments, so please take a look.Please note that we do not list new products, as our contracts with our suppliers prohibit international shipping.
About our stores
In Japan, we have about 30 stores in Tokyo (Ikebukuro, Shibuya, Akihabara) and Osaka.
We have just opened our flagship store, IKESHIBU (IKEBE SHIBUYA), in Shibuya, Tokyo, which brings together numerous musical instrument specialty stores and serves as a hub for entertainment culture.
Please be sure to stop by if you are visiting Japan.


About Shipping





We carefully pack every item with protective materials to ensure it arrives safely.
The photos above show an example of how we securely pack a bass guitar for shipping.