Welcome to the MH Instruments Help Section.
Please scroll down for answers to frequently asked questions. If you still need assistance, please contact us:
Customer Service Inquiries
To Submit Repairs ONLY:*
Send to: MHI Service
1040 Hillcrest Drive
Pomona, CA 91768
To Submit Testimonials**
*Please note that repair deliveries may be rejected if receipt signature is required. Please read "Returns" section below for instructions.
**When submitting testimonials and photos for our consideration via email, please send high-resolution 300 dpi photos if at all possible. You may be asked to complete a photo release form. Please note that submitting testimonials and photos does not obligate us to post or otherwise use them.
24902 Via Santa Cruz
Mission Viejo, CA 92692
Owner Manuals & Installation Guides
Rumble Road™ Speakers FAQs
How would you characterize the sound quality of Rumble Road™ speakers?
MHI’s high-output, high-fidelity Rumble Road™ stereo speaker system produces crisp, powerful sound even at highway speeds. The current-generation Ultra and Premium amplified systems, and Limited non-amplified systems deliver powerful, clear audio response. Ultra and Limited models currently feature high-performance Alpine speakers, while Premiums feature high-efficiency speakers from JVC. For all models, our quality speakers are large enough to create good bass response.
Do Rumble Road™ speakers perform well at highway speeds?
A number of MHI customers have given us highly enthusiastic feedback as to how good Rumble Road™ speakers sound, even at highway speeds. Customers consistently give us positive feedback in this regard. In fact, many riders claim that Rumble Roads have made them "leader of the pack"; other riders fall back so they can enjoy the Rumble Road™ speakers! (To them, we say, "Wouldn’t you rather have your own?") It’s worth noting that this is not home theater, and proper perspective is a good thing. Please keep in mind that these are 4" speakers subject to the whims of wind — the higher the volume, the greater the distortion level. But, for their size, Rumble Road™ speakers pack a great punch.
What types of audio devices can I hook up to Rumble Road™ speakers?
Easily installed on handlebars, spotlight mounting bars or forks, the current-generation Rumble Road™ Ultra and Premium speaker systems with integrated amplifiers work with virtually any smartphone or portable stereo radio, MP3, CD or cassette player featuring a standard 3.5mm mini-plug headphone jack. For devices manufactured with 2.5mm stereo jacks, adapters are available from electronics stores. Products with "floating ground" amplifiers, such as very low-end FM radios, may not work optimally with Rumble Road™ speakers. If your motorcycle or ATV is already equipped with a conventional car stereo setup, we recommend MHI’s custom non-amplified Rumble Road™ Limited speaker system.
Can I get full volume from my MP3 player?
MHI’s fourth generation of Rumble Road™ amplified stereo speakers features new higher-gain, integrated amplifiers, which translates to more volume pumped through the system’s high-end speakers and better performance when paired with low-output MP3 players and other audio devices. We increased our proprietary amplifier’s voltage gain by more than 60 percent — from 20 to 33. A low-output MP3 player produces about half a volt, so volume from these devices is lower compared with other, higher-output personal stereos and smartphones that easily produce twice as much. MHI’s upgraded design now provides ubiquity, ensuring full-power output from virtually any device and making MP3s sound better, even at highway speeds.
Can Rumble Road™ speakers be used with a conventional AM/FM car stereo?
MHI’s non-amplified Limited model works with any conventional AM/FM car stereo system (either common ground or bridged) to provide high-quality sound on the go or while parked. Based on the successful Rumble Road™ Ultra and Premium amplified speaker systems, the non-amplified Limited speakers are easily installed on handlebars, spotlight mounting bars, luggage bars or forks.
How big are the speakers?
The domed, spotlight enclosures that house Rumble Road™ Ultra, Premium and Limited speakers are approximately 4.75" in diameter and about 3" deep. The raw speaker is 4" in diameter.
Do the Ultra, Premium (amplified) and Limited (non-amplified) models use the same speakers?
Both the Rumble Road™ Ultra and Limited systems currently use high-performance Alpine speakers. The Premium system features high-efficiency speakers from JVC. All models deliver powerful, clear audio response.
How does the integrated amplifier work? Where is it located?
MHI’s custom-built amplifier mounts behind each speaker assembly within the spotlight enclosure and provides all the power needed to drive the speaker. Dual-bridged amplifiers built into each speaker produce high-fidelity sound reproduction at impressive volumes and low distortion. We are the original designers of this system.
Can I install Rumble Road™ speakers on my bike’s handlebars without drilling holes?
Yes, handlebar mounting without drilling holes in the bar is possible with clamps available from MHI and included with each speaker system as a complete kit.
If my bike has a windshield, can I still mount Rumble Road™ speakers on the handlebars?
Many of our customers mount Rumble Road™ speakers just inside the windshield, on the handlebars. As a guideline, allow for the 3" depth of the speaker enclosures, which are approximately 4.75" in diameter, and a standard 3/8" mounting bolt. By turning the mounting clamp opening so that it faces the seat versus the windshield, you can typically gain an additional two inches of clearance.
Where can I place my smartphone, personal stereo, CD player, cassette player or MP3 player?
You can place your smartphone or audio player just about anywhere within easy and safe reach, on your bike or in your pocket.
Where can I place my car stereo?
Depending on its size, a conventional AM/FM car stereo may be mounted in one of the storage compartments, or saddlebags, outfitted on some bikes. One of the cleanest installations we’ve seen features Rumble Road™ Limited speakers together with a remote-controlled marine radio placed in a saddlebag (see below).
Are Rumble Road™ speakers connected directly to the battery?
Rumble Road™ speakers can be wired either directly to a 12-volt battery, through a user-supplied switch and fuse, or to another switched and fused 12-volt source on your bike. Most of our customers wire the speakers to an existing 12-volt accessory line, headlight power line or other switched accessory on their bike, based on the generalized instructions provided in our installation manual. Your local automotive sound shop or motorcycle dealer should be able to help you find a suitable power source and properly install the system.
Can I install two sets of Rumble Road™ speakers on my bike without overtaxing the battery?
You certainly can! Some of our customers have cleverly installed "quad" mounts — a pair on the handlebars and an opposing pair astride the passenger seat. If you still can’t quite picture it, this approach is beautifully illustrated by one of our customer testimonials. Each pair of Rumble Road™ Premium speakers draws 5 amps peak from the battery.
Can I use a power adapter to run my personal stereo off my bike’s power system instead of using the batteries?
Yes; however, some personal stereos used in this configuration may produce ground noise amplified by the Rumble Road™ Ultras or Premiums. This noise is characterized as a high-pitched whine and occurs whether the engine is on or off. A ground loop isolator (available at most electronics stores) may be inserted between the audio device’s headphone output jack and the input to the speakers. This remedy eliminates any ground loops — and the resulting noise — between the two systems.
Do I need a noise filter to reduce interference from the engine?
If you experience sound distortion caused by engine interference when your bike is running, you can easily and affordably install a noise filter. Noise filters are available in our amplified system kits for your convenience. This filter greatly attenuates electrical noise or whine produced by some motorcycle electrical/ignition systems. One filter works for both Rumble Road™ amplified speakers in the system. A noise filter is automatically included with orders for complete amplified speaker kits.
I installed a noise filter along with my amplified speakers but still get a humming noise and low volume from the speakers. How can I troubleshoot?
A hum is indicative of a bad ground – typically the signal ground. Try double-checking the signal ground from your stereo player, including all black leads connecting the player to the speakers. If the problem persists, you may have installed the speakers at a weak ground point. To remedy, try jumping a wire from the bike's negative battery terminal to the mounting bolt of each speaker. If this results in increased volume, you may need to wire in a good ground.
Are Rumble Road™ speakers waterproof?
Rumble Road™ speakers are water-resistant but not waterproof. The speakers feature injected plastic cone material and are sealed tightly within the spotlight enclosure with heavy rubber washers. The tight mesh of the stainless steel grille covers also helps keep the system dry. MHI has conducted extensive, successful tests for water resistance, and customers have not reported any weather-related malfunctions with properly installed speakers.
Please note: We highly recommend that speakers not be installed upside down, as this allows rain and other water sources to get inside the speakers, which can result ultimately in malfunction.
Are Rumble Road™ speakers prepackaged with mounting hardware, or do I have to order hardware separately?
Two mounting clamps in a finish that matches your selected speakers are included with each speaker kit. You can select from two to three sizes depending on the speaker system you purchase.
Several ordering options are available for your convenience....
Ordering by Telephone
When ordering by telephone, please call +1.949.713.2173 during normal business hours (Pacific Time).
Ordering by Mail
Mail orders to:
24902 Via Santa Cruz
Mission Viejo, CA 92692
What forms of payment do you accept?
In the United States, MHI accepts VISA, MasterCard and American Express credit cards, cashiers' checks and money orders as forms of payment. C.O.D. service is available only when payment is made with cashier's check or money order at time of delivery. When ordering online or by telephone, please have your credit card readily available and ensure that you provide us with the card's correct billing address as it may not be the same as your shipping address. All orders are subject to verification of payment. If we have any problems with your credit card, we will call or email you for resolution and verify payment before we can ship your order.
Orders shipped within California will automatically incur 7.25% sales tax at time of order, and shipments to Orange County, Calif., will incur an additional 0.5% sales tax. Shipments outside California currently are exempt from sales tax.
International Payment Options
Accepted forms of payment for orders placed outside the United States include VISA or MasterCard.
I just need mounting hardware. Is there a minimum order requirement?
No minimum order is required.
What are my options if the item I want is out of stock?
While we have an ample inventory of parts in stock and do our best to keep up with demand from our dealers and retail customers, we may occasionally experience backorders. We will inform you promptly of any temporarily out-of-stock products. In addition, we will ship any backordered items the same day we receive them, and notify you when your order has actually been shipped.
How quickly can I get my order delivered, and what will it cost?
MHI normally ships in-stock items within 24 hours of receipt. We offer FREE Priority Mail or UPS Ground shipping for U.S. orders placed directly with MH Instruments and, currently, a flat $20 for international orders. Please allow 3-5 days for shipments within the United States, longer for international orders.
Are there special considerations for international shipments?
Customers are responsible for applicable customs charges, VAT and other taxes, and any other costs associated with non-standard delivery of purchases from MH Instruments.
My package was damaged in shipping. What do I do?
If the package you receive has been damaged in shipping, please do not refuse delivery. Contact MHI Customer Service at email@example.com or +1.949.713.2173 so that we may make the necessary arrangements on your behalf.
MHI normally ships in-stock items within 24 hours of receipt. We offer FREE Priority Mail or UPS Ground shipping for most U.S. orders placed directly with MH Instruments (accessory items may ship USPS First Class), and a flat $20 shipping fee for international orders. Please allow 3-5 days for shipments within the United States, longer for international orders.
What's involved in returning an order?
If for any reason you are not 100% satisfied with an MHI product purchased directly from MH Instruments, you may return it for a refund or exchange within 90 days. Just return the product to us in like-new condition, along with the extended warranty form enclosed with your new product, within 90 days from the date it was shipped to you, and we will refund the full purchase price less shipping costs, which are nonrefundable. MHI reserves the right to determine whether a full or partial refund or an exchange is merited based on the condition of the returned merchandise. Returns made after our 90-day guarantee expires are subject to a 10% restocking fee. Defective products or products sent to you in error will be exchanged or refunded in full.
For purchases not made directly from MH Instruments, please contact the dealer who sold you the product for their return policy.
Please note that MH Instruments will only accept returns for refunds from those customers who have purchased directly from MHI. Please return MHI products purchased elsewhere to the dealer or representative from whom you bought the merchandise originally.
How to Return an Order
When returning merchandise to us, please follow these simple procedures to ensure a smooth return:
- Use the original carton(s), if possible.
- Pack the merchandise securely to prevent scratching or other damage.
- Enclose a copy of your invoice.
- Enclose a completed copy of the return/repair form located on the last page of your owner manual or inserted in the manual
- Ship the item(s) to us prepaid via USPS with Delivery Confirmation or UPS. Please retain your tracking number. You may want to insure the returned merchandise for its full value to protect yourself against loss. Please do not return goods to us C.O.D.; we cannot accept C.O.D. shipments from customers.
- Send to: MH Instruments Service, 1040 Hillcrest, Pomona, CA 91768 USA.
What if I'm making a return from outside the United States?
Please follow the instructions for returning an order (see above). In addition, please write clearly on the outside of the carton: CONTENTS: RETURN GOODS OF U.S. ORIGIN.
Guarantee / Warranty
What sort of guarantee does MHI offer? What about warranty information?
MH Instruments now provides a 90-day satisfaction guarantee on products and services purchased directly from MHI, and a two-year warranty on parts and labor. We do not provide warranty coverage of inventory close-outs, which are noted when applicable.
90-Day Satisfaction Guarantee
If for any reason you are not 100% satisfied with an MHI product purchased directly from us, you may return it to us for a refund or exchange. Just return the product to us in like-new condition within 90 days from the date it was purchased from us, and we will refund the full purchase price less shipping costs, which are nonrefundable. MHI reserves the right to determine whether a full or partial refund or an exchange is merited based on the condition of the returned merchandise.
MH Instruments warrants each new product it manufactures to be free from defective materials and workmanship. MHI agrees to remedy any such defect or replace the unit, at our option, provided the unit is delivered to us, intact, with all transportation charges prepaid to our factory, for a period of two (2) years from the date of MHI-direct sale to the original purchaser or for a period of one (1) year from the date of third-party sale to the original purchaser. Inventory close-out items are not included in our warranty.
Used and Damaged Merchandise
Any product that we determine shows evidence of being used or installed contrary to our instructions, and/or subjected to improper handling, packaging or shipping by the customer, will not be eligible for exchange, refund or warranty consideration.
We reserve the right to charge a minimum restocking fee of 10% or to refuse any exceptions to our return policy.
Privacy & Security
I don't want my personal information shared. Will MHI respect my privacy?
Your privacy is important to us, and MHI is committed to protecting your online shopping experience. To better protect your privacy, we outline here our online information practices, and the choices you can make about the way your information is collected and used.
In general, we use information we collect from you to process orders and to ensure a smooth and secure online shopping experience. The following explains how and what information is collected, how it is used and how it is protected.
What kind of personal information does MHI collect?
From our site, you can order products, make requests and register to receive materials. When you place an order, we collect your name, address, telephone number, credit card number and expiration date, and email address. We use this information to process and fill your order, and to contact you about the order.
We collect information to monitor traffic patterns and site usage to help us improve the design of the site. We may provide aggregate statistics about our customers to reputable third-party vendors; however, this data does not contain any personally identifying information.How does MHI use the information it collects?
We use your personal information only to complete your online order or respond to your request. We do not share this information with outside parties except to the extent necessary to complete your order or respond to your information request. We use return email addresses to answer the email we receive. Such addresses are not shared with outside parties.
By using this website, you consent to the collection and use of information by MH Instruments as described herein.
Will I end up on someone's mailing list if I contact MHI via email?
Our Contact Us page provides several email addresses for your convenience when contacting us. Information collected through these email exchanges is only used to correspond with you regarding your message. email addresses and other information that you send through this page are not made available to anyone outside the company.
Can I expect MHI to contact me in the future?
MHI may occasionally email you to notify you of significant changes in our website or to make you aware of special offers that may be of interest. If you do not want to receive these site notifications or special offers, you will have the opportunity to unsubscribe. We do not make this information available to other companies.
In addition, we may distribute email newsletters containing special offers, sales notifications and other information of interest pertaining to our products. You may change or remove your email address using the option included with every email newsletter. We do not make these newsletter addresses available to other companies.