Our goal with the latest Dr. Z amp, the EMS, was to produce the essential sounds of 3 generations of classic British amplifiers. Starting with the mid-60s JTM 50 variant, we combine a dual EL-34 power section with a tube rectified power supply, available by selecting “tube” via the rectifier switch on the back panel. Along with the tube rectifier, setting the EMS’ sensitivity switch to “low” and “Touch” response switch to the down position, this combination will produce the bloom and feel of the early American tweed amps but with the British charm of EL-34 output tubes.
Flashing forward to the 70s, the essence of the “small box” JMP amp is available in the EMS by selecting the “solid state” rectifier via the back panel, selecting “low” sensitivity, and using the “Touch” switch to match the amplifier with your choice of guitar. Using the same circuit topography of the JTM series, only with a more powerful solid state power supply, this sound is noted for its lightning quick response and cutting “kerrang” in the upper midrange.
Lastly, the EMS incorporates the cascaded gain stage design found in the 80s JCM series. By using the “high” sensitivity switch on the front panel, and selecting solid state rectification, hard rock and classic metal tones with tight bass response and singing gain will come screaming out of your guitar. We massaged the circuit to remove some of the annoying, persistent high-treble this era of amplifier has been maligned for and boosted the gain a bit further so that more “modern” drive tones are available higher on the gain knob.
The EMS, like all Dr. Z amplifiers, is 100% hand-wired in Maple Heights, OH using select components throughout its stages and built on a custom rolled aluminum chassis. It has a precise copy of the Drake 784-139 50-watt output transformer for authentic British crunch. For a perfect match to the EMS small box head, we have our 2×12 cabinet loaded with a Celestion Creamback 65M speaker and a Celestion G12 H30 70th Anniversary speaker wired in series for 16 ohm. This cab is a great aesthetic match to the EMS head and is covered with black tolex, black grill cloth, and gold piping.
- 50 Watts
- Output Tubes: 2 – EL34 (fixed bias)
- Preamp Tubes: 3 – 12AX7
- Rectifier: Switchable 5U4GB tube and solid state diodes
- Controls: Gain, Volume, Treble, Middle, Bass, Presence
- Other: 4, 8, 16 Ohm impedance via rotary switch, Hi/Lo sensitivity switch, “Touch” sensitivity switch, Tube/Solid State rectifier switch
- *matching 2×12 cabinet with Celestion Creamback and H30 speakers available at special price when ordered together.
- Head*: 23 5/8″ W, 9 5/8″ H, 9 1/4″ D, 30 lbs.
- *matching 2×12 cabinet: 24” H, 24” W, 10” D, 53 lbs.
Most orders over $99.00 ship for free inside the lower 48 states. Certain items that are large and heavy do not qualify for free shipping.
We Ship Worldwide!
For information on International Shipping, please call, email or use live chat for rates. Orders shipping outside the Lower 48 States to Hawaii, Alaska, Puerto Rico and international orders do not qualify for free shipping. Orders shipping to U.S. Military APO/FPO addresses, PO Boxes, and US territories (Guam, Virgin Islands, etc.) can only ship USPS. NOTE: Boxes over 70 lbs each cannot be shipped to these locations.
As a security precaution, orders over $200.00 will only ship to the address your credit card company has on file for you.
* Korg and Mesa/Boogie products are only available for shipment within the USA.
14 Day Return for Merchandise Credit or Exchange
We're so sure you'll enjoy shopping with us that if for any reason, you're not completely satisfied with any item you receive from Matt's Music, simply call us within 14 days of the time you receive your merchandise for either a full in-store credit, or exchange - all entirely up to you. Items must be in brand new, factory fresh, resalable condition with all original packing materials, warranty cards and owners manuals, and show no signs of wear or abuse. All returns are subject to inspection. Special order items that are not normally stocked are non returnable. Ask if your purchase qualifies before you buy. Credit/exchange is for merchandise only and does not include any shipping charges. No refunds are issued in any case. Layaways are good for 60 days and layaway deposits are non refundable.
Early Order Cancellation
All deposits are non refundable. Lots of our products are special orders and in many cases your order has to be built for you at the factory. This is what makes a lot of our products special. Once your order is started, it's being put together just for you. For this reason we ask that you don't cancel your order after you place it with us. If for some reason you absolutely have to cancel your order with us, we will assess you a 25% cancellation charge. This amount is equal to 25% of your total order amount. Ask us before you place your order to see if what you're purchasing is considered a special order.
Do not accept your shipment if the package shows any signs of external damage. After the item is returned to us we will ship you a replacement. If you receive incorrect or defective merchandise, please call 781-335-0700 within 5 days for a return authorization number.